Hitachi-LG Data Storage, Inc. Patent applications |
Patent application number | Title | Published |
20160033122 | OPTICAL MODULE AND METHOD OF MAKING THE SAME - An optical module having a high-moisture-proof package structure in which dew condensation does not occur is provided. | 02-04-2016 |
20150309400 | LIGHT SOURCE MODULE AND IMAGE PROJECTION DEVICE - A light source module and an image projection device which can have high resolution and high optical efficiency are provided with a simple optical system. A light source module includes a light source unit formed by a plurality of stacked light emission surfaces which emit lights of at least red, blue, and green wavelength bands, and a light-source drive and control unit which supplies a driving current to the respective light emission surfaces of the light source unit. Each of the light emission surfaces of the light source unit has a nanostructure smaller than a wavelength of visible light near a p-n junction provided in a semiconductor having a larger band gap than the visible light, and emits a light of a corresponding one of the wavelength bands via a phonon level. | 10-29-2015 |
20150279414 | DATA ARCHIVE SYSTEM - A data archive system includes a data library apparatus and a server. The data library apparatus includes recording media having recording surfaces on both surfaces, a recording media storage unit for storing the recording media, a recording/reproducing unit for the surface for recording/reproducing the data on/from the surface of the recording media, a recording/reproducing unit for the rear surface for recording/reproducing the data on/from the rear surface, and a recording media transporting unit for transporting the recording media between the recording media storage units. The server includes a data configuration unit for allocating the data for recording on the surface and the rear surface of the recording media and a controller for controlling the data library apparatus. The data configuration unit of the server alternately allocates the recording data on the surface and the rear surface of the recording media different from each other. | 10-01-2015 |
20150213828 | OPTICAL DISK INSPECTION METHOD AND OPTICAL DISK LIBRARY DEVICE - An optical disk library device includes an optical disk storage unit that stores a plurality of optical disks, a plurality of record and reproduction units that record and reproduce data with respect to the optical disk, a. transporting mechanism that transports the optical disk between the optical disk storage unit and record and reproduction unit, a library control unit that controls the optical disk library device, and an interface that transmits data and commands to and receives data and commands from a higher device, in which the library control unit controls a record and reproduction unit so as to inspect a predetermined inspection area of an optical disk on which data is recorded based on data recording conditions, and stores an acquisition value obtained by the inspection. | 07-30-2015 |
20150146511 | OPTICAL INFORMATION RECORDING/REPRODUCING DEVICE AND OPTICAL INFORMATION RECORDING/REPRODUCING METHOD - In an optical information recording/reproducing device that radiates signal light and reference light to a recording medium, forms a hologram, and records information and emits the reference light to the hologram of the recording medium and reproduces information, a laser light source that generates the signal light and the reference light; a light angle control unit that controls an angle of the reference light incident on the recording medium; a light detecting unit that detects diffracted light when the reference light is radiated; a positioning unit that allocates an address to the recording medium and performs positioning of the recording medium for the address; a tilt measuring unit that measures a tilt of the recording medium; and a control unit that controls the incidence angle of the reference light, on the basis of a tilt measurement result in a recording mode, in a reproduction mode, are included. | 05-28-2015 |
20150117172 | OPTICAL PICKUP - An optical pickup includes a pair of first tracking coils near the center of the lens holder in the tracking direction on one side of the holder; a pair of first magnets facing the first tracking coils and near the outer sides of the holder in the tracking direction; a pair of second tracking coils near the outer sides of the holder on another side of the holder; and a pair of second magnets facing the second tracking coils and near the center of the holder. The vertical electromagnetic force F in each of the first tracking coils is larger than the vertical electromagnetic force f in each of the second tracking coils. A distance K between the action center of the force F and the support center of the movable part is shorter than a distance k between the action center of the force f and the support center. | 04-30-2015 |
20150109895 | OPTICAL INFORMATION REPRODUCING APPARATUS, OPTICAL INFORMATION REPRODUCING METHOD, AND OPTICAL INFORMATION RECORDING METHOD - When books are densely bedded on a recording medium for recording a hologram on the medium with a high density, the books need to be positioned at a reference light irradiation position with a high precision when reproducing. An optical information reproducing apparatus for producing information from an optical information recording medium, includes: a light source that emits a reference light; an angle adjustment part that adjusts an incident angle of the reference light emitted from the light source to the optical information recording medium; a filter part that suppresses an unnecessary light of a diffracted light obtained when the optical information recording medium is irradiated with the reference light adjusted by the angle adjustment part; a light detection part that detects at least a part of the diffracted light obtained by irradiating the optical information recording medium with the reference light adjusted by the angle adjustment part; and a control part that controls the filter part, wherein at least a part of page data within an adjacent book is recorded as information on the optical information recording medium while deviating the incident angle of the reference light in an angle multiplexing direction, and wherein the control part controls the filter part on the basis of the signal detected by the light detection part. | 04-23-2015 |
20150085633 | OPTICAL INFORMATION RECORDING APPARATUS AND OPTICAL INFORMATION RECORDING METHOD - An optical information recording apparatus configured to record information into an information recording medium by using holography, the apparatus including: a signal generation unit configured to generate two-dimensional data; and a two-dimensional spatial light modulator unit configured to display the two-dimensional data and to spatially modulate a transmitted or reflected beam, wherein the two-dimensional spatial light modulator unit includes a signal region and an external region, the signal region displays two-dimensional data based on user data, the external region displays two-dimensional data not including the user data, and the signal generation unit generates two-dimensional data in such a manner that a frequency of the two-dimensional data displayed on the external region becomes equal to or larger than a frequency of the two-dimensional data displayed on the signal region. | 03-26-2015 |
20150043321 | CHANNEL BITWORD PROCESSOR, PRML DECODER, AND OPTICAL INFORMATION RECORDING/REPRODUCING DEVICE - It is an objective of the present invention to provide a technique, when using fixed-length run-length limit codes based on enumeration, that generates fixed-length channel bit words satisfying maximum run-length limitation using a simple configuration. A channel bit word processor according to the present invention includes an avoidance list that describes a difference between a user bit word satisfying a maximum run-length limitation of run-length limit code and a user bit word not satisfying the maximum run-length limitation. The channel bit word processor, if a user bit word does not satisfy the maximum run-length limitation, generates a channel bit word using a user bit word after the difference is added. | 02-12-2015 |
20140344642 | MODULATION/DEMODULATION METHOD, DEMODULATION APPARATUS, AND CODE MODULATION METHOD - Patterns that might be generated due to a burst error are prepared beforehand. These patterns are formed by shifting all “1”s in an original channel word. A list of these patterns generated as described above is retrieved in parallel with a general conversion table during demodulation. When the demodulation is interrupted due to the burst error, the result of the retrieval of the previous pattern is referred to, and when there is a hit, the error is regarded as the burst error of the original channel word, and the demodulation is continued. | 11-20-2014 |
20140301813 | OPTICAL DISC LIBRARY APPARATUS - In an optical disc library apparatus having a cartridge storing discs; a drive carrying out recording and playback with respect to the discs; and a robot carrying out disc movements between the aforementioned cartridge and the aforementioned drive; wherein: the periphery of a disc is point restrained in three places during disc movement. | 10-09-2014 |
20140301177 | OPTICAL INFORMATION RECORDING/REPRODUCING APPARATUS AND OPTICAL INFORMATION RECORDING/REPRODUCING METHOD - An optical information recording/reproducing apparatus for recording an interference pattern between signal light and reference light information-multiplexed as a hologram in an optical information recording medium and for reproducing information recorded in the optical information recording medium on the basis of the recorded hologram with use of the reference light. The apparatus includes a light source for emitting light and a coherency controller for controlling a coherency of the light source. The apparatus controls the coherency controller in such a manner as to switch between a coherency required in a recording mode and a coherency required in a reproducing mode. | 10-09-2014 |
20140301176 | OPTICAL INFORMATION RECORDING/REPRODUCING APPARATUS - An optical information recording/reproducing apparatus for recording information on a recording medium and/or reproducing information from the recording medium, includes: a laser light source for performing recording and/or reproducing information; a shielding part, using a liquid crystal, that can switch between transmission and interception of laser light emitted from the laser light source; a driving circuit for driving the switching between transmission and interception of the shielding part; a moving part for relatively moving the shielding part and the laser light; and a controlling circuit for controlling the moving part. The moving part relatively moves the shielding part and the laser light so as to switch a region to which the laser light is applied from a first region of the shielding part to a second region thereof different from the first region, in order to prevent the liquid crystal from deteriorating. | 10-09-2014 |
20140293764 | OPTICAL DISC INSPECTION METHOD IN OPTICAL DISC LIBRARY APPARATUS AND OPTICAL DISC LIBRARY APPARATUS - An optical disc library apparatus, on which and plural optical discs and plural optical drives are mounted, has the ability to reduce the degradation of recording/reproduction capability owing to the variation of temperature. In the optical disc library apparatus, causes for the quality degradation of the optical discs are analyzed; temperature inside the optical disc library apparatus is measured in order to make recoveries in accordance with the causes; an inspection cycle for inspecting the optical discs is determined on the basis of the measured temperature; and the inspection of recording qualities of optical discs on which data have already been recorded and that are stored in the optical disc library apparatus is performed by the optical drives on the basis of the measured temperature. | 10-02-2014 |
20140286152 | DATA RECORDING/REPRODUCING DEVICE, ARCHIVE SYSTEM, AND RECORDING CONTROL METHOD - A data recording/reproducing device for recording data on a recordable area of a recording medium in an arbitrary recording unit, includes a control unit that controls the operation of the data recording/reproducing device. The control unit designates a recording unit where data on the recordable area is not recorded as a non-use area, determines whether data has been recorded, or unrecorded in the recording unit on the recordable area, determines the recording unit designated as the non-use area to have been recorded, and records data in the recording unit determined to be unrecorded when data is recorded on the recording medium, under the control. | 09-25-2014 |
20140286150 | DATA ARCHIVE SYSTEM AND QUALITY INSPECTION METHOD - Disclosed is a data archive system that executes inspection of a recording quality of an optical disc, estimates a recording quality deterioration factor, and informs it to a user, and a method for estimating the recording quality deterioration factor. The data archive system has a server and a data library device. The server has a whole control part, a data library I/F part, and a recording medium. The data library device has multiple recording media, a recording medium storing part, multiple recording/reproducing parts, and a library control part. The recording medium stores attribute information about the recording medium. The whole control part executes first quality inspection on a first recording medium, executes second quality inspection on a second recording medium, refers to attribute information of the recording media recorded on the information recording medium, and controls so that a factor deteriorating the qualities of the recording media may be estimated. | 09-25-2014 |
20140211601 | QUALITY EVALUATION METHOD, INFORMATION RECORDING MEDIUM, OPTICAL DISC DEVICE AND RECORDING/REPRODUCING SYSTEM - When data is recorded on an optical disc, and stored for a long period of time, there is a need to periodically evaluate whether a quality of the recorded data is determined with time, or not. If the signal quality is lower than a given level as an evaluation result, a work for moving the data to a brand-new optical disc is required. However, in periodical inspection, if the number of optical discs is enormous, a large amount of time is required to evaluate all data recorded on the optical disc. In recording user data on the optical disc, a signal of a particular pattern having a lifetime shorter than a reference lifetime of the user data is recorded in a given area of the optical disc in advance, the particular pattern signal is reading at given time intervals, and processing on the user data is determined on the basis of the evaluation result of the signal quality. | 07-31-2014 |
20140211600 | RECORDING/REPRODUCING DEVICE AND OPTICAL DISK LIBRARY DEVICE - In a recording/reproducing device for recording and reproducing an optical disk, when performing verify processing of inspecting a quality of recorded data and compare processing of inspecting whether the recorded data can be read without errors, a time is taken because the same area needs to be reproduced two times. The verify processing and the compare processing are performed at one time reproduction. To perform the verify processing and the compare processing simultaneously, a recording quality storage part is provided in the recording/reproducing device, and reproduced data is transmitted to a host controller while storing quality information at the time of reproduction by an instruction of the host controller. The host controller performs the compare processing by comparing transmitted data and data at the time of recording and inspects the recording quality by acquiring the quality information of a reproduced area from the recording/reproducing device at intervals set in advance. | 07-31-2014 |
20140160911 | METHOD FOR EVALUATING INFORMATION REPRODUCTION PERFORMANCE, INFORMATION REPRODUCTION DEVICE, AND INFORMATION RECORDING MEDIUM - A method for evaluating a reproduction performance which reproduces a specific pattern recording signal to measure a reproduced signal noise, and calculates an evaluated value of a reproduction performance on the basis of a frequency characteristic of the measured reproduced signal noise. | 06-12-2014 |
20140096150 | LIBRARY SYSTEM - The present invention relates to a library system including a disc recording/reproducing unit, a disc container, and a disc transport unit for transporting a disc between the disc recording/reproducing unit and the disc container. In order to improve the reliability of the operation of moving the disc from the disc recording/reproducing unit to the disc transport unit, a disc transport controller determines the situation in both the disc recording/reproducing unit and the disc transport unit, and error-stops the operation according to the result of the determination. Alternatively, the disc transport controller retries the movement of the disc, by pulling the disc into the disc transport unit or returning the disc to the disc recording/reproducing unit, and by finely adjusting the relative positions of the disc recording/reproducing unit and the disc transport unit if necessary, in order to solve the problem of damage to a surface of the disc. | 04-03-2014 |
20140064049 | OPTICAL INFORMATION RECORDING DEVICE - An optical information recording/reproduction device includes a detection unit which detects a focus-direction height of a recording medium, a focus adjustment unit which adjusts a focus-direction distance between the recording medium and a signal light optical system and a reference light system, and a control unit which controls the focus adjustment unit so that a relative distance between the object lens of the signal light optical system and the recording medium is adjusted according to the focus-direction height of the recording medium detected by the detection unit. | 03-06-2014 |
20140036652 | OPTICAL INFORMATION RECORDING MEDIUM, RECORDING AND REPRODUCTION METHOD, AND RECORDING AND REPRODUCTION DEVICE - In the land-groove method, wobble interference is reduced. STW modulation is used as wobble modulation for a part where wobble interference can occur, for example, a part where the configurations of both side walls of the groove are not the same and groove width modulation is unavoidable. Thereby, the amplitude of the groove width modulation can be suppressed to a quarter of that when BPSK modulation is used. | 02-06-2014 |
20140029404 | HOLOGRAPHIC MEMORY APPARATUS AND METHOD FOR ADJUSTING INCIDENT ANGLE OF REFERENCE BEAM - A holographic memory apparatus includes an optical detector which receives reflected light of reference beam from the surface of a hologram recording medium. An incident angle of the reference beam is estimated on the basis of information on a focused position on the optical detector. When the incident angle is different from a target incident angle, the incident angle of the reference beam is adjusted according to a difference between the incident angle and the target incident angle. | 01-30-2014 |
20140022881 | INFORMATION RECORDING METHOD, INFORMATION RECORDING APPARATUS, INFORMATION RECORDING MEDIUM, AND MEDIUM ESTIMATING METHOD - A recording waveform is adjusted based on the fluctuation amount of the mark edge position, focused on that fluctuation of a mark edge position is increased in aged deterioration of a recording signal. Specifically, the recording waveform is adjusted such that a fluctuation amount becomes minimum or a threshold value or less. Then, information is recorded on the optical disc using the recording waveform. Further, provided is a recording medium or an information recording apparatus which stores parameters of the recording waveform. | 01-23-2014 |
20130318545 | ODD ARCHIVE APPARATUS - It is provided an ODD archive apparatus to which a plurality of optical disk media are mounted, the ODD archive apparatus comprising: a cartridge unit accommodating the plurality of optical disk media therein; an optical disk drive for reading/writing data from/to the plurality of optical disk media; a rail assembly for carrying the plurality of optical disk media; and a chassis accommodating the cartridge unit, the optical disk drive, and the rail assembly therein. The rail assembly includes a carrying unit for holding and carrying one of the plurality of optical disk media; a rail for guiding movement of the carrying unit; and a motor for moving the carrying unit, the rail assembly having both end portions fixed to the chassis. | 11-28-2013 |
20130290810 | DATA ARCHIVE SYSTEM, DATA RECORDING/REPRODUCING APPARATUS AND DATA LIBRARY APPARATUS - In a data recording and reproducing apparatus that includes a host computer and a drive in order to improve data reliability, in data recording, the host computer appends a first error correction code to the data and the drive appends a second error correction code to the data. When a failure has occurred in error correction performed by the drive using the second error correction code, the drive reads out the first error correction code and performs error correction using the first error correction code. Since error correction using the first error correction is possible even when error correction using the second error correction code ends in failure, the reliability of data is improved. | 10-31-2013 |
20130276003 | OPTICAL DISC UNIT - A disadvantage is reduced in which a front panel of an optical disc unit tilts by a clearance (rattle) between the components and contacts with a body of a PC incorporating the unit to cause malfunction of insertion and ejection of discs. A disc tray is provided to move relative to rail guides attached to a bottom case of the optical disc unit via rails. The disc tray and rail guides have projection portions to contact with each other with stress. As a result, the clearance is reduced and the disadvantage due to the malfunction is reduced. The contact of the projection portions is close to point contact. The number of the contact positions is three or four. Support portions are provided to the rail guides to generate the stress. | 10-17-2013 |
20130275394 | INFORMATION PROCESSING SYSTEM - Deduplication is executed in a storage device having low random access performance, such as an optical disk library. When an optical disk that is not inserted into an optical disk drive needs to be accessed in order to execute binary compare, data to be binary compared is stored in a temporary memory area in order to postpone the binary compare, and on the timing when the optical disk is inserted, the postponed binary compare is executed. Before second deduplication, which is deduplication between data to be stored in the storage device and the data in the optical disk library, is executed, first deduplication, which is deduplication between the data to be stored in the storage device and the data in the temporary memory area, is executed. | 10-17-2013 |
20130258826 | RECORDING/REPRODUCING SYSTEM AND SERVER - A reproducing process of related data is efficiently performed also in a recording medium having recording surfaces at both of front and rear surfaces in a recording and reproducing system including a plurality of recording media. | 10-03-2013 |
20130227217 | ARCHIVE SYSTEM AND PROCESSING METHOD - In a RAID group using a plurality of recording media readable and writable on both sides, a data configuration such that data on front sides of other disks may be held on back sides of respective double-sided disks is formed and managed, and data for restoration is created from readout data of other data disks than that with failure. | 08-29-2013 |
20130223197 | LIBRARY APPARATUS - In a library apparatus, it is not considered that eliminated is an operation for reversing a direction of a double-sided readable/writable recording medium. In the library apparatus having a function of transporting and loading a recording medium from a recording medium storage unit to a recording and reproducing unit through a recording medium transportation unit, a direction in which an unrecorded recording medium is first loaded in the recording and reproducing unit is afterward treated as a front surface, and a direction opposite to the above direction is treated as a rear surface. | 08-29-2013 |
20130201809 | RECORDING/REPRODUCING SYSTEM AND SERVER - If a fault, or deterioration in read-out quality, is detected during recording processing with respect to a first recording face, a duplication is made, with respect to the recorded data on the second recording face of the same recording medium, on a separate recording medium. | 08-08-2013 |
20130139189 | DISK DRIVE DEVICE - A disk drive device that can prevent warping deformation in upward and downward directions of a disk tray and can prevent vibration in a warping deformation mode without producing a rattle vibration is provided. A disk drive device has a casing and a disk tray on which the spindle motor and the pickup are mounted; and a pair of parallel first and second guide mechanisms that slidably supports the disk tray so as to eject the disk tray from the casing to the outside. In the disk drive device, in a center part in a width direction along the disk mount surface of an introduction side distal end part of the disk tray, an introduction side abutment part having a groove section or a protruding portion is formed, and an inner part abutment part formed on an elastic member is installed on an inner side inner wall part. | 05-30-2013 |
20130100786 | DATA LIBRARY APPARATUS - A data library apparatus capable of changing the mounting positions of disks on the basis of information recorded in the disks and the access histories of the disks. Disks expected to be accessed next are mounted in advance on data recording/reproducing devices, on slots nearer to the data recording/reproducing devices, or on a disk carrying device, etc. In addition, disks relevant to currently active disks are mounted on positions so that the optical disk carrying device can bring out the relevant disks at a time without being moved, and hereby the time necessary for disk access in the data library apparatus can be reduced. | 04-25-2013 |
20130064059 | OPTICAL DISK LIBRARY DEVICE AND OPTICAL DISK DEVICE SELECTING METHOD - In an optical disk library device using a plurality of optical disk devices, before optical disk devices execute recording or reproduction of information to or from optical disks, self-monitoring information is acquired from an optical disk monitor, use preferential orders of the optical disk devices are evaluated on the basis of use frequency information or deterioration information included in the self-monitoring information and an optical disk device to be used for recording or reproduction of information is selected on the basis of the use preferential orders. | 03-14-2013 |
20120331491 | OPTICAL DISC APPARATUS - An example of an optical disc apparatus includes a top case and a bottom case. The top case includes a tab extending downward from one end of the top case. The tab includes a protrusion protruding inward. The bottom case includes a lower-side folded portion formed by folding inward an upper end of one side surface of the bottom case. The lower-side folded portion includes a cantilever spring. The cantilever spring includes a spring portion extending in a vertical direction and a curved portion formed by folding inward an upper part of the spring portion. The protrusion comes into contact with the curved portion when the top case is being affixed to the bottom case and is in contact with the spring portion under a state where the top case is affixed to the bottom case. | 12-27-2012 |
20120311626 | DISTRIBUTING APPARATUS FOR CONTENT LIST AND CONTENT, AND TRANSMITTING METHOD - A distributing apparatus including a communication processor unit to execute transmission of data between a content receiving apparatus connected through a network; a content list producer unit to produce an optical disc content list for when loaded in the optical disc drive apparatus, while to produce a recording medium content list when the optical disc is not loaded; a content list transmitter unit; a content transmitter unit; an authenticator unit; a key producer unit, which is configured to produce key information necessary for encoding the content(s) to be transmitted by the content transmitter unit; and an encoder unit, which is configured to encode the content(s) with using the key information in the key producer unit. | 12-06-2012 |
20120250476 | RECORDING/REPRODUCING DEVICE - The present invention relates to a recording/reproducing device that records data on a double-sided recordable optical disk for storage and management purposes. The device includes a unit which stores a plurality of optical disks, a unit which records data onto and reproduces data from an upper side of an optical disk, a unit which records data onto and reproduces data from a lower side of an optical disk, a unit which conveys an optical disk between the disk storage unit and each recording/reproducing unit. When a request for reading data recorded on the lower side of the disk is received while the upper side is being written onto, a control unit interrupts a data recording process on the upper side, reproduces data recorded on the lower side, and after completion of reproducing the recorded data, resumes the interrupted data recording process. | 10-04-2012 |
20120250474 | OPTICAL DISK APPARATUS - An optical disk apparatus which conducts overwriting of data on a rewritable optical disk or conducts write-once recording of data on a write-once optical disk includes a control unit for receiving a recording command which specifies a recording area and orders recording and receiving transfer data, and a collation unit for collating existing data on the optical disk with the transfer data. Upon reception of the recording command and the transfer data by the control unit, the existing data is collated with the transfer data by the collation unit, and overwrite recording of data in places where the transfer data is different from the existing data is conducted on the rewritable optical disk, or data in places where the transfer data is different from the existing data is recorded in an unrecorded area of the write-once optical disk. | 10-04-2012 |
20120236695 | OPTICAL DISK DEVICE AND DRIVING METHOD THEREOF - The optical disk device can stably control an aberration correction lens even when one end of a movable range of the aberration correction lens is set as a reference position. The optical disk device comprises an optical pickup unit including the aberration correction lens and a stepping motor for moving the aberration correction lens, wherein, when an optical disk is inserted into the optical disk device, the aberration correction lens is moved to the reference position within the movable range and near one end thereof, and wherein, when moving the aberration correction lens to the reference position, driving pulses are applied to the stepping motor to press the aberration correction lens against the one end of the movable range, and thereafter a predetermined number of pulses are applied to reversely rotate the stepping motor and to set a stop position where the aberration correction lens stops as the reference position. | 09-20-2012 |
20120230171 | OPTICAL DISC DEVICE - The operability of an optical disc device for reading or writing data from/to a disc having a data layer and a servo layer is improved by increasing the resistance to control disturbances. An optical disc device in accordance with the present invention includes an objective lens, a relay lens, a blue-violet laser detector, a red laser detector, an objective lens focus actuator, an objective lens tracking actuator, a relay lens actuator, a pair of focus error signal generating units, a pair of focus control signal generating units, a switching unit for selecting a focus control signal, a pair of tracking error signal generating units, a pair of tracking control signal generating units, a switching unit for selecting a tracking control signal, a focus error conversion unit and a tracking error conversion unit. | 09-13-2012 |
20120224465 | RECORDING REPRODUCING APPARATUS AND RECORDING REPRODUCING METHOD - If a recording error has occurred during RAW, then subsequent recording reproducing processing is omitted in a predetermined range, and all blocks omitted in the processing are handled as defective blocks, DFL-registered, and recorded in a replacement area. As a result, it becomes possible to hold down the number of times of recording processing accompanied by seek processing in the RAW processing, and transfer rate lowering can be solved. | 09-06-2012 |
20120106307 | OPTICAL DISC APPARATUS AND DEFOCUS CORRECTING METHOD - An optical disc apparatus in which a bias of a focusing error signal is changed to a value according to a recording power at timing corresponding to a predetermined address position before starting the recording and a defocus of an opposite polarity is preliminarily caused so as to set off a defocus which occurs at the start of the recording. | 05-03-2012 |
20120075975 | OPTICAL DISC APPARATUS, INFORMATION RECORDING METHOD, AND OPTICAL DISC - The invention prevents mark distortion during high-speed recording on an optical disc, thereby improving recording performance. A write pulse signal includes mark periods during which marks | 03-29-2012 |
20120044795 | Optical Disc Drive - Bandwidth is secured for a read signal transmission line by matching the characteristic impedance of the read signal transmission line with the output impedance of a photodetector of an optical pick up, while at the same time securing bandwidth for the photodetector. In an optical disc drive according to an embodiment of the present invention, each line forming a differential transmission line is divided into a plurality of lines of the same quantity, the quantity being two or more, at or near a connection point between a flexible line and the optical pick up. | 02-23-2012 |
20110235805 | STORAGE SYSTEM AND METHOD FOR GENERATING ENCRYPTION KEY IN THE STORAGE SYSTEM - In a storage system including a plurality of recording medium drives and encrypting and recording data with a device key, even if a recording medium drive fails and is replaced with another drive, the data stored by the failed recording medium drive can be reproduced. The plurality of recording medium drives has not only their own device keys, but also copies of the device keys of the other recording medium drives. If any one of the recording medium drives is replaced and data in a recording medium mounted in the replaced recording medium drive cannot be decrypted, the drive queries the other recording medium drives to acquire a copy of a device key of a recording medium drive used in the past and decrypts the encrypted data. | 09-29-2011 |
20110235481 | STORAGE SYSTEM AND METHOD FOR GENERATING FILE SYSTEM IN THE STORAGE SYSTEM - A storage system, which includes a plurality of ODDs, is configured so as to easily retrieving a predetermined file from files stored in a plurality of optical discs. The storage system includes a storage controller connected to the plurality of ODDs and a nonvolatile memory via a storage bus. Each of the optical discs mounted in the ODDs has a file system representing the storage structure of files stored in the optical disc. The nonvolatile memory stores copies of the file systems of all the mounted optical discs. A user refers to the file system stored in the nonvolatile memory to retrieve a file. When an optical disc is ejected, the optical disc stores copies of the file systems of the other optical discs and is ejected. If the optical disc is installed into another storage system, the user can search for a file stored in the other optical discs. | 09-29-2011 |
20110211432 | OPTICAL DISC AND OPTICAL DISC APPARATUS - The invention provides an optical disc apparatus which prevents that a laser beam whose power is set at a read power level causes erroneous data recording or deletion. The optical disc apparatus includes an emission controller which controls an amount of an electrical current that a current supply portion supplies to a laser diode in order to control a level of emission power at which the laser diode emits the laser beam. The emission controller has a function to set levels of the emission power at the following transition processings: a transition processing after a read processing and before a write processing, a transition processing after a write processing and before a read processing, a transition processing between two read processings for respective areas, and a transition processing between two write processings for respective areas. | 09-01-2011 |
20110197211 | OPTICAL DISC DRIVE - In an optical disc drive, a degradation of traveling performance of an optical pickup under hard acceleration or hard deceleration in a random access operation or the like results in a degradation of recording/reproducing performance. Groove structure is provided between two gears of a guide feed provided in an optical pickup, and the groove forms bending structure. Thus, the engagement state between a screw gear and the gears of the guide feed is stabilized. This makes it possible to prevent tooth jumping and step-out from occurring in the gears during the traveling of the optical pickup, achieving stable traveling. In consequence, the recoding/reproducing performance of the optical disc drive can be improved. | 08-11-2011 |
20110197210 | OPTICAL DISC DRIVE - An optical disc drive with low vibration and low noise without risk of damage to components and injury caused by ejection of the disc tray with the rotating optical disc from a housing is provided by simple structure. In a disc-tray scheme of the optical disc drive, a brake member attached to the inside of the housing is placed to be in contact with the optical disc sliding thereon when the disc tray is in a predetermined position except the disc recording/reproducing position and the disc loading/unloading position, and to be connected to the disc tray when the disc tray is in the disc recording/reproducing position. | 08-11-2011 |
20110131575 | RECORDING/REPRODUCING APPARATUS - A recording/reproducing apparatus, for producing a virtual disc independent upon a host PC, and for managing virtual discs with an easy operation, comprises a CPU | 06-02-2011 |
20110126221 | Flexible Printed Circuit and Electric Apparatus and Optical Disc Drive Having Flexible Printed Circuit - A electronic device including a mechanism for changing the relative positions of two circuit boards such as in an optical disc drive, in which a flexible printed circuit electrically connecting between the two circuit board changes shape to suppress fluctuations in the transmission characteristics occurring due to contact with metal such as a case, and provides stable signal transmission. A flexible printed circuit is comprised of at least one or more differential lines, a fixed unit affixed to a case at least at one location, a movable unit that changes shape according to the relative positions of two case. The lines adjacent to the differential line are a grounded surface, and the flexible printed circuit is formed to narrow the distance between the movable unit lines more than the distance between the fixed unit lines. | 05-26-2011 |
20110116351 | Servo Controller and Optical Disk Device - In a servo controller and an optical disk device (FIG. | 05-19-2011 |
20110110206 | OPTICAL DISK DEVICE - Proposed is an optical disk device capable of optimally adjusting a current value of a direct current and a high frequency superimposed current for driving a laser diode. This optical disk device includes a laser driver for superimposing a high frequency current on a direct current to obtain a drive current and supplying the drive current to the laser beam source and driving the laser beam source, and a control unit for adjusting a current value of the direct current and/or the high frequency superimposed current supplied by the laser driver to the laser beam source based on the servo signal or the reproduction signal. The control unit adjusts the current value of the direct current and/or the high frequency superimposed current so that a value representing a waveform fluctuation of the servo signal or the reproduction signal satisfies a specified value of the waveform fluctuation, a value representing a reproduction performance of the reproduction signal satisfies a specified value of the reproduction performance, and a value representing a durability performance of the optical disk in relation to the laser beam satisfies a specified value of the durability performance. | 05-12-2011 |
20110096649 | Optical Disk Apparatus with an Improved Track Jump Performance - An optical disk device for recording or reproducing an optical disk has: an objective lens for irradiating a laser beam to the optical disk; an actuator for moving the objective lens in the radial direction of the optical disk; and a spindle motor for rotating the optical disk. After the laser beam irradiated to the optical disk passed through a PID portion of the optical disk, the actuator moves the objective lens in the radial direction of the optical disk at a timing corresponding to a rotational speed. Between signals to drive the actuator, an output time of a deceleration signal is set to a predetermined ratio of a time during which an acceleration signal is outputted. While the deceleration signal is outputted, a light spot passes through the PID portion. | 04-28-2011 |
20110080822 | OPTICAL DISC DRIVE - When a multilayered optical disc is used, the signal-to-noise ratio of a read signal is decreased as effective reflectance is extremely low due to the influence of reflection and absorption by front recording layers. Further, when a high-frequency modulation technology is used to suppress returned light noise of a laser, the erasure of recorded information is likely to occur on certain types of discs, making it difficult to simultaneously achieve the suppression of returned light noise of a laser and the prevention of the erasure of recorded information. To address the above problems, the present invention includes a section that performs a read by executing a multi-tone demodulation. The present invention also includes a section that controls the position and shape of a read light pulse to be radiated on a recording layer. | 04-07-2011 |
20110075532 | Optical Disk Device and Optical Disk Discriminating Method - An optical disk discriminating method and an optical disk device which can detect reflected rays for making discrimination among kinds of optical disks with high accuracies. By switching a plurality of lasers and moving a spherical aberration corrector while moving an objective lens to cause it to approach or keep away from an optical disk, rays reflected light from the optical disk can be detected with high accuracies. Discrimination among the kinds of a plurality of optical disks can be made on the basis of signals generated from the detected reflected rays. This ensures that the kind of an optical disk can be determined through one operation of sweeping. | 03-31-2011 |
20110055856 | Optical disc apparatus - An optical disc apparatus, presenting recording quality without degradation by an extreme temperature rise in an objective-lens drive mechanism in an optical pickup, includes a mechanical chassis on which a disc rotation mechanism, an optical pickup, and a transfer mechanism are mounted, a decorative plate that is a plate-shaped member located between the disc and the optical pickup and fixed on the mechanical chassis, a disc tray for loading and removing the disc, a circuit board for operation control, and an apparatus housing containing the components. A recess is formed in an indented shape in a portion of the mechanical chassis facing an outer peripheral region of the disc recording surface. An incline is formed in a position close to an opening of the disc tray for mounting the mechanical chassis and opposite the outer peripheral region of the disc recording surface, and slopes gently down to the recess. | 03-03-2011 |
20110051589 | Optical Disc, Optical Disc Reproducing Apparatus, Optical Disc Apparatus, Reproducing Method and Recording Method - Where a hybrid disc has different types of media, the light spot moves among recording layers of the different media, after loading the disc into an optical disc apparatus, there is a problem that information on a media type of each recording layer should be recorded in DI etc. of the optical disc. Detailed information on the hybrid disc is stored in DI, by changing a disc layer type identifier or a disc structure in DI such as BCA or PIC on the optical disc. | 03-03-2011 |
20110038241 | Optical Disc Recording Device - A technique for investigating differences of composition and structural state of a recording layer of an optical disc along with other defects, such as scratches, contamination, warp and distortion, prior to video recording and for setting up appropriate recording conditions in compliance with this result to thereby perform recording is disclosed. In an optical disc recording device capable of recording information on an optical disc, a region to be investigated is defined based on the video recording reservation contents. Then, investigate and evaluate the disc state which can affect the recording quality in a target disc region to be recorded. Next, based on investigation/evaluation results, perform recording setup, recording speed setup, servo control setup and recording position setup to thereby perform the recording. By appropriately modifying the recording setup on a case-by-case basis, it is possible to achieve high-quality recording. | 02-17-2011 |
20110019514 | Recording and Reproducing Apparatus and Method - A Spare Area kept unused on a disk is available for use other than spare processing, or Defect Management process, and compatibility of the disk is at least secured between different recording apparatuses. This is implemented by recording a SWP_PAC cluster defined as a new item and by recording address information of used addresses in a PAC or TDDS area. | 01-27-2011 |
20110002206 | Apparatus and Method for Recording/Reproducing On/From Medium - To prevent the degradation in read access performance to replacement data caused by not selecting appropriate replacement clusters and to suppress the waste of the number of DFL registrations. Attention is paid to the usage direction of a user data area and that of a replacement area, and in the case where one CRD-type DFL registration can be made collectively in the sequential defect management processes, a replacement area of which the usage direction is the same as that of the user data area is selected. | 01-06-2011 |
20110002205 | Medium Recording and Reproduction Apparatus and Method - Medium recording and reproduction apparatus and method can prevent prohibition of disc recording due to the fact that laser power calibration area becomes unusable by studying a management information update method during data recording. When usable capacity of the laser power calibration area is monitored and the capacity is reduced, management information area to be currently updated is changed to another layer. | 01-06-2011 |
20100302920 | Optical Disk Drive and Program Therefor - Provided is an optical disk drive including: an actuator for driving an objective lens for applying a beam from a laser to an optical disk to cause a focal point of the beam to move in a focus direction; and a servo controller for receiving an input of a focus error signal and driving the actuator to control a focusing position of the beam, which includes: a compensation unit for generating a drive signal for the actuator based on the focus error signal; a noise detection unit for detecting a noise component by changing a limiter characteristic according to a frequency of the drive signal; and a correction unit for correcting the drive signal by subtracting the noise component from the drive signal. Accordingly, an influence of a tracking error signal leaking into the focus error signal in a focus servo system can be reliably suppressed. | 12-02-2010 |
20100260018 | Optical Disk Apparatus with an Improved Track Jump Performance - An optical disk device for recording or reproducing an optical disk has: an objective lens for irradiating a laser beam to the optical disk; an actuator for moving the objective lens in the radial direction of the optical disk; and a spindle motor for rotating the optical disk. After the laser beam irradiated to the optical disk passed through a PID portion of the optical disk, the actuator moves the objective lens in the radial direction of the optical disk at a timing corresponding to a rotational speed. Between signals to drive the actuator, an output time of a deceleration signal is set to a predetermined ratio of a time during which an acceleration signal is outputted. While the deceleration signal is outputted, a light spot passes through the PID portion. | 10-14-2010 |
20100202259 | OPTICAL DISC APPARATUS - An optical disc apparatus for recording or reproducing on or from an optical disc, comprising a laser light source for emitting a laser beam; a drive portion for driving the laser light source; a detection portion for detecting the emission power of the laser beam; and means for focusing the laser beam onto the optical disc, wherein information is reproduced by a reproducing power varied according to a recording power to obtain reproducing signals having necessary quality while suppressing deterioration of the recording quality due to the reproducing power. | 08-12-2010 |
20100172223 | Optical Disk Apparatus - A servo control of an optical disk apparatus increases a suppression degree of an iterative learning control system, against a frequency disturbance of integer multiple of rotation frequency in a predetermined rotation phase range including a range, in which a servo deviation is detected, of the rotation phase. | 07-08-2010 |
20100157770 | OPTICAL DISC DRIVE AND OPTICAL INFORMATION READ METHOD - An HF waveform prevailing during a read operation varies due, for instance, to changes in the ambient temperature of an optical disc drive and variations in the characteristics of a laser. This degrades read performance and decreases the number of rewritable disc read operations. To address the above problems, an optical disc drive and an optical information read method are disclosed. The disclosed optical disc drive and optical information read method vary an HF amplitude in relation to the resistance, differential resistance, or temperature of the laser. | 06-24-2010 |
20100128580 | Optical Disc Apparatus and Focus Offset Control Method - An optical disc apparatus in which processing time is shortened and processing accuracy is ensured upon focus offset processing for plural recording layers. Regarding each of mutually adjacent recording layers, based on a signal based on reflected light from a guide groove formed in a recording surface of the recording layer, a focus offset for an optical system with respect to the guide groove is learned, and based on the learned focus offsets for the respective recording layers, a focus offset for recording or reproduction is calculated and set. In an optical disc having three or more recording layers, a focus offset when the difference between the focus offset and the learned focus offsets for the respective recording layers is a value corresponding to the characteristic of the optical system is set as a focus offset for the respective recording layers or a common focus offset to the respective recording layers. Otherwise, a mean value of the focus offsets when the differences between the focus offsets and the learned focus offsets for the respective recording layers are values corresponding to the characteristic of the optical system is set as a focus offset for one recording layer. | 05-27-2010 |
20100118677 | Optical Disc Apparatus, Method of Adjusting Focus Offset for Optical Disc Apparatus, and Program for Executing Focus Offset Adjustment - In an optical disc apparatus, whether an unrecorded recording layer without information recorded thereon is included in the multiple recording layers of the optical disc mounted inside the apparatus is judged. then when the unrecorded recording layer is judged to be present, a signal for focus offset adjustment is recorded in a non-user data recording area of the unrecorded recording layer, and reproduction of the recorded focus offset adjusting signal is followed by its quality evaluation, which is further followed by calculation and setup of an appropriate focus offset value based on evaluation results. | 05-13-2010 |
20100118670 | SERVO CONTROL SIGNAL GENERATION DEVICE AND AN OPTICAL DISK DEVICE USING THE SAME - A servo control signal generation device for discriminating a kind of an optical disk, changing over between top and bottom envelope signals of an RF signal, and generating a defect signal and a mirror signal includes an RF generator for generating the RF signal from reflected light of an optical disk, a disk discriminator for discriminating a kind of the optical disk from the RF signal, and a top envelope generator and a bottom envelope generator respectively for generating the top and bottom envelope signals of the RF signal. If the disk has reflectance after recording which is lower than that before recording, the defect and mirror signals are generated respectively from the top and bottom envelope signals. If the disk has reflectance after recording which is higher than that before recording, the defect and mirror signals are generated respectively from the bottom and top envelope signals. | 05-13-2010 |
20100061206 | OPTICAL INFORMATION RECORDING METHOD - To solve the problem of deterioration in recording quality due to a change of a write waveform caused by changes of temperature and recording powers, aged deterioration and the like. A driver having a function of controlling rise/fall times and an overshoot amount of an optical waveform is used to optimize an optical waveform that changes in recording under the influence of a component of a laser and the like. Specifically, the rise/fall times and the overshoot amount of the optical waveform are optimized by obtaining a waveform control register value from test recording or a table. | 03-11-2010 |
20100054099 | Optical Disc Apparatus and Focus Offset Setting Method Thereof - An optical disc apparatus in which, regarding mutually adjacent recording layers, a focus offset of an optical system to a guide groove formed in a recording surface of the recording layer is learned based on a signal based on reflected light from the guide groove, and a focus offset for recording or reproduction is calculated and set based on the learned focus offsets for the respective recording layers. As the focus offset of the optical system for recording or reproduction, a mean value of the learned focus offsets for the respective recording layers is set as a focus offset common to the both recording layers. Otherwise, a focus offset when a difference between the focus offset and the learned focus offsets for the respective recording layers is a value corresponding to a characteristic of the optical system is set. This structure reduces processing time and ensures processing precision upon focus offset processing for plural recording layers. | 03-04-2010 |
20100054094 | Optical Disc Drive - To obtain optimum conditions for writing data on the disc. Provided is an optical disc drive for writing/reading data on/from a loaded optical disc medium comprising: a pickup for writing/reading data on/from the optical disc medium using laser light; and a controller for controlling an operation of the optical disc drive. The controller judges whether the loaded optical disc medium is unrecorded; records a first piece of data on a test area of the optical disc medium in a case where the loaded optical disc medium is judged to be unrecorded; determines optimum output power for recording the data by reproducing the first piece of data; records a second piece of data on the test write area using the determined optimum output power; and adjusts focus balance by reproducing the second piece of data. | 03-04-2010 |
20100053806 | DISC DRIVE APPARATUS - A disc drive apparatus comprises: a spindle motor | 03-04-2010 |
20100031277 | TRAY OF OPTICAL DISK DEVICE AND OPTICAL DISK DEVICE INCLUDING THE SAME - A tray of an optical disk device and an optical disk device including the tray are provided. In a tray rear portion located at a higher level than a tray bottom portion, a first tapered surface as a draft taper and a second tapered surface sloping more gently than the first tapered surface are formed. An upper end of the second tapered surface is located farther from a center of rotation of an optical disk than a lower end, and thus air in a peripheral portion of the optical disk generated during rotation of the disk is introduced along the tapered surface to a rear. | 02-04-2010 |
20100023957 | Optical Disc Apparatus - An optical disc apparatus for enabling reduction of fluid noises accompanying with disc rotation, effectively, comprises a tray | 01-28-2010 |
20100020653 | Optical Disc Apparatus and Method for Recording Information Using the Same - This invention provides an optical disc apparatus constructed to discriminate a disc ID of an optical disc on which information is to be recorded, then derive, from a strategy pre-registered in the optical disc apparatus, test-recording repetition count information that matches the discriminated disc ID, and after using the derived test-recording repetition count information to assign the number of test-recordings to be conducted upon one specific address within a test-recording area of the optical disc, implement the assigned number of test-recordings and calculate an optimum recording power level for information recording, based upon a read signal generated after the final test-recording. The above construction improves recording power accuracy of information recording on rewritable optical discs. | 01-28-2010 |
20090316555 | Multilayer Optical Disk, Multilayer Optical Disk Recording Apparatus and Multilayer Optical Disk Reproducing Apparatus - A multilayer optical disk apparatus comprises an optical pickup that emits N (N represents an integer of two or more) laser beams of the same wavelength. The optical pickup emits the N laser beams at the same time, focuses the N laser beams on a first recording layer group alternately configured by N recording layers of the multilayer optical disk and performs a recording operation on the N recording layers at the same time. When changing the recording layers the optical pickup focuses the N laser beams on a second recording layer group configured by recording layers adjacent to the respective recording layers configuring the first recording layer group and performs a recording operation on the N recording layers at the same time. | 12-24-2009 |
20090316538 | Optical Disc Apparatus - An optical disc apparatus comprises an overcurrent detector and when the overcurrent detector detects an overcurrent during a recording operation or a reproduction operation and during an operation for controlling a focus of an objective lens, a rotation speed of an optical disc is reduced and an actuator is controlled to cause the objective lens to be in a retracted state under the condition that a disc motor exerts brake force. The objective lens is in the retracted state until the rotation speed of the optical disc becomes equal to or smaller than a predetermined value and when the rotation speed of the optical disc is equal to or smaller than the predetermined value, the objective lens is released from the retracted state. | 12-24-2009 |
20090310457 | Optical Disk Recording Apparatus, Laser Diode Driving Apparatus and Recording Signal Generating Apparatus - The optical disk recording apparatus has the function of correcting the timing shift of the write strategy signal caused by the change in the operating environment of the digital signal processing circuit including the write strategy generating circuit, the laser drive circuit for driving the laser at the time of recording and the flexible printed board for electrical connection between the digital signal processing circuit and the laser drive circuit. Upon determination that the timing shift correction is required, the timing shift is reduced by operating the timing shift correcting function. | 12-17-2009 |
20090310455 | Optical Disc Reproducing Apparatus, In-Vehicle Optical Disc Reproducing Apparatus, In-Vehicle Optical Disc Reproducing System, and Optical Disc Reproducing Method - An in-vehicle optical disc reproducing apparatus according to the present invention reads disc specific information from an optical disc, and inputs vehicle specific information from an IC card, or the like. Next, the in-vehicle optical disc reproducing apparatus creates an encryption key from the disc specific information and the vehicle specific information, and then uses the created encryption key to encrypt content stored on the optical disc before the encrypted content is stored in a HDD. During the above process, if shaking of a vehicle is detected, the processing of storing the encrypted content to the HDD is stopped. When the encrypted content is reproduced, the disc specific information is checked. Only when an original disc is inserted, the encrypted content is decrypted by use of the stored encryption key to generate the original content so that the original content can be reproduced. | 12-17-2009 |
20090268591 | HIGH-FREQUENCY SUPERIMPOSING METHOD AND OPTICAL DISK APPARATUS USING IT - An optical disk drive includes drive current generation unit for supplying a mark forming semiconductor laser drive current and a space forming semiconductor laser drive current; first high-frequency superimposition unit for superimposing a high-frequency component on the space forming semiconductor laser drive current; and high-frequency superimposition control unit for controlling the first high-frequency superimposition unit to stop the superimposition of the high-frequency component for a predetermined duration prior to a timing at which to switch from the space forming semiconductor laser drive current to the mark forming semiconductor laser drive current, eliminating positional variations on the disk of the mark leading and trailing edges due to the high frequency superimposition. | 10-29-2009 |
20090265726 | OPTICAL DISC DRIVE AND ELECTRONIC APPARATUS - An optical disc drive comprises: a disc tray | 10-22-2009 |
20090222844 | Optical Disc Apparatus - There are provided a disk motor arranged on a chassis, an optical pickup that performs recording and reproducing of a signal from an information recorded surface of an optical disk, a pair of guide shafts arranged on the optical pickup to guide the optical pickup radially of the optical disk, adjustment screw that move at least one ends of the guide shafts in a direction substantially perpendicular to a surface of the chassis, a leaf spring arranged on a frame body to bias the one end of the guide shaft toward the surface of the chassis, and the leaf spring includes a support surface that supports the one end of the guide shaft, and a stopper portion projecting from the support surface to define a clearance between the support surface and the surface of the chassis. | 09-03-2009 |
20090154313 | Optical Disc Apparatus - In servo control within an optical disc apparatus, when iterative learning control is started, the servo characteristics are modified to servo characteristic giving increased gains during a given period of time. Under this condition, the iterative learning control is provided. | 06-18-2009 |
20090135684 | Defocus Detection Device, Defocus Detection Method and Optical Disk Unit Using the Same - Defocus detection device and method capable of detecting a defocus accurately during recording of information to an optical disk having a plurality of recording layers and an optical disk unit using the device and method are provided. A temporal restriction is imposed on defocus detection and besides, in comparison with a level for detection of a first change of a focus error signal developing during a defocus, a level for detection of a successively occurring second change of a polarity inverse to that of the first change is made to be smaller. When the first level is exceeded and thereafter the second level is exceeded within a restricted time, a defocus is detected. | 05-28-2009 |
20090100501 | Content Providing System, Content Providing Method, and Optical Disk - A terminal transmits disk identification information and user information to a content delivery server for purchase of initial content in the case where the content to be stored in an optical disk is provided to a user. The user information and the content delivered by the content delivery server are written on the optical disk. The optical disk storing the initial content is set in the terminal for purchase of additional content. The terminal transmits, to the content delivery server, disk identification information, the user information and content information. The content delivery server determines whether or not the purchase of the additional content is authorized. When the content delivery server determines that the purchase of the additional content is authorized, the content delivery server delivers the additional content to the terminal. The terminal writes the additional content on the optical disk. It is therefore possible to prevent content from being copied and obtained in an unauthorized manner and provide content based on preferences and characteristics of the user. | 04-16-2009 |
20090080306 | OPTICAL DISK DEVICE AND OPTICAL DISK DISCRIMINATING METHOD - An optical disk discriminating method and an optical disk device which can detect reflected rays for making discrimination among kinds of optical disks with high accuracies. By switching a plurality of lasers and moving a spherical aberration corrector while moving an objective lens to cause it to approach or keep away from an optical disk, rays reflected light from the optical disk can be detected with high accuracies. Discrimination among the kinds of a plurality of optical disks can be made on the basis of signals generated from the detected reflected rays. This ensures that the kind of an optical disk can be determined through one operation of sweeping. | 03-26-2009 |
20090080300 | Data transmission method, optical disc recording method and optical disc recording apparatus - A data transmission method for a large amount of contents information, comprises the following steps of:
| 03-26-2009 |
20090073840 | Optical disk drive - According to one aspect of the present invention, there is provided an optical disk drive that is equipped with a land prepit detection circuit, the land prepit detection circuit including: a first peak hold circuit for inputting a push-pull signal to output a first peak voltage; a second peak hold circuit for inputting the push-pull signal through an LPF to output a second peak voltage; a bottom hold circuit for inputting the first peak voltage to output a bottom voltage; a slice level generation circuit for dividing the difference between the bottom voltage and the second peak voltage to generate a slice level used to detect a land prepit; and a comparator for comparing the push-pull signal with the slice level generated by the slice level generation circuit to detect the land prepit. | 03-19-2009 |
20090059755 | Method for adjusting a focus position on an optical disc and an optical disc apparatus applying the same therein - In a method for adjusting a focus position for an optical disc, onto/from which in formation is recorded or reproduced, while adjusting the focus position of an optical reproducing means, upon a recording surface of an optical information recording medium having an area where information of the optical information recording medium is recorded in advance, comprising the following steps of: memorizing plural numbers of information relating to focus positions determined appropriately, which can be obtained from the area where the information of the optical information recording medium is recorded in advance; and adjusting the focus position for the optical disc loaded into an apparatus, from at lease one (1) signal relating to the focus position, which can be obtained from the optical disc, with utilizing a relationship between the plural numbers of information relating to the focus positions determined appropriately, memorized in advance, when reproduction of the information is impossible when the optical disc is loaded into the apparatus, thereby providing the focus position adjusting method and an optical disc apparatus applying the same therein, for enabling an appropriate focus adjustment even in case when DMA area cannot read out due to damages or defects therein. | 03-05-2009 |
20090046557 | PRML (Partial Response Maximum Likelihood) information reproducing method and information reproducing apparatus for implementing the same - An information reproducing method using PRML technology which provides asymmetry compensation and also assures media interchangeability. To compensate for asymmetry, target levels are basically adapted to readout signals and either restriction type (1) (time reversal and level reversal symmetry) or restriction type (2) (time reversal symmetry) is imposed between target levels. As a consequence, asymmetry compensation is made regardless of a readout signal distortion such as mark shift which might deteriorate media interchangeability. | 02-19-2009 |
20090028020 | Optical disk device and control method for the same - Provided is an optical disk device capable of recording and/or reproducing information on optical disks with high reliability; and a method for controlling the optical disk device. The position of an optical lens where the amplitude of a reproduction signal during the period corresponding to a minimum-length recording mark and a space having the same length reaches its maximum is detected; and the detected position is set as a reference position for the objective lens relative to the optical disk, for use in focus control. Also, the position of the objective lens where the result of multiplication of resolution and modulation becomes greatest is detected; and the detected position is set as a reference position for the objective lens relative to the optical disk, for use in focus control. | 01-29-2009 |
20080304376 | Opitical disc device and tracking and slider control method - An optical disc device and tracking control method capable of stable tracking control even for inferior optical discs with tracks decentered by a large amount. The optical disc device and tracking control method includes: obtaining a rotation angle at which the degree of displacement of the track due to the eccentricity of the optical disc becomes maximum on the inner circumference side and the outer circumference side, and detecting the eccentricity amount of the optical disc; and performing track pull-in at the rotation angle, at which the degree of displacement of the track due to the eccentricity of the optical disc becomes maximum, detecting a displacement direction of the optical disc at the time of the pull-in, and moving the slider in the detected displacement direction for a distance equal to or almost equal to the eccentricity amount of the optical disc. | 12-11-2008 |
20080298204 | Optical disc drive apparatus - An optical disc drive apparatus, for recording/reproducing upon/from an optical disc medium having a plural number of recording layers, comprises a recording/reproducing element, which is configured to irradiate a laser upon the optical disc medium, to as to conduct recording/reproducing thereon/from, wherein recording is conducted within a region of an arbitrary range on the optical disc medium by means of the recording/reproducing element, and the region is used for moving an optical spot of the laser irradiated from the recording/reproducing element when recording/reproducing data thereon/from. | 12-04-2008 |
20080271062 | Optical disc apparatus - To prevent deformation of a chassis due to an impact force in an optical disc apparatus, there is provided a tray for inserting/ejecting an optical disc into/from an apparatus body, with the chassis connected thereto through vibration proof materials in plural portions in a surface opposite a disc placing surface. The tray has projecting portions projecting in a chassis direction in positions facing the chassis in peripheral portions of the plural connecting portions. The projecting portion is located at a position higher than a tray plane with which the vibration proof material comes into contact, and lower than the surface of a chassis facing the tray. When the vibration proof material is compressed and deformed due to the impact force, the projecting portion comes into contact with the chassis facing surface, to reduce the amount of deformation of the vibration proof material and thereby prevent deformation of the chassis. | 10-30-2008 |
20080270869 | Data reproducing apparatus - A data reproducing apparatus has a nonvolatile memory in addition to a memory for data processing. When data error is uncorrected, data and error correction codes other than uncorrected data are accumulated in the memory for data processing. Corrected data is coupled and repaired, and the repaired data is stored in the nonvolatile memory. It is possible to reproduce data without retry, even if data error is uncorrected when the data of an optical disc is reproduced at the next time. | 10-30-2008 |
20080239893 | Optical Disc Apparatus - An optical disc apparatus capable of conducting seek processing stably. If an angle is given to an objective lens in a radial direction by using an actuator at the time of seek processing, then it is possible to correct deviation between an amplitude center of a tracking error signal obtained when crossing a track and a level obtained when a tracking servo system is in the on-state, which is caused by an objective lens getting out of a center of intensity distribution of laser light. The deviation can also be improved by adding an offset to the tracking error signal. Therefore, stable seek processing is conducted by conducting tilt correction or adding an offset to the tracking error signal, according to a movement condition. | 10-02-2008 |
20080235715 | Optical disc apparatus - To eliminate scratches on a disc surface of an optical disc in an emergency eject operation, there is provided an optical disc apparatus including: an emergency eject detector for detecting an emergency eject instruction; a rotation speed detector for producing a signal corresponding to the rotation speed of the optical disc; and a logical circuit unit which is operated by a first signal from the emergency eject detector and a second signal from the rotation speed detector, and when the second output signal is not more than a reference level, produces a third signal so as to input a control signal for instructing stop of the actuator control into an actuator controller. After detection of the emergency eject instruction, the apparatus performs the actuator control without producing the third signal until the rotation speed is not more than a predetermined value. Thus the objective lens is made in a focus control state or in a saving state in which the objective lens is separated from the disc surface. | 09-25-2008 |
20080219107 | Built-in type optical disc apparatus - For providing a built-in type optical disc apparatus, to be installed in a part of an electronic equipment having plural kinds of electric power source portions within a housing thereof, enabling to protect from a malfunction or breakdown of parts thereof when power source is one-sided, thereby to achieve a desired operation with certainty, the optical disc apparatus comprises: a first electric power source portion, to convert a first power source voltage, which is supplied from an electric power source portion provided within the housing of the electronic equipment, into a predetermined voltage, to be supplied to a part of the respective portions, which build up said optical disc apparatus; and a second electric power source, to convert a second power source voltage, which is supplied from another electric power source portion provided within the housing of the electronic equipment, into another predetermined voltage, to be supplied to other part of the respective portions, which build up the optical disc apparatus, and further comprises an electric power source observation portion | 09-11-2008 |
20080205218 | Optical disc drive and method for processing recorded data - This invention provides a technique which ensures that if a recording error occurs in an optical disc, recorded data will be immediately erased from the disc without leaking to third parties. While recording data onto the optical disc, a controller judges whether the recording process has been executed to completion properly. If the recording process is judged to have failed, the controller will stop the recording process and activate an optical pickup to erase recorded data from the data-recording area on the optical disc by overwriting this area with required erasing data. | 08-28-2008 |