Class / Patent application number | Description | Number of patent applications / Date published |
369530200 |
Of record carrier
| 215 |
369530120 |
Having abnormal condition indicating
| 173 |
369530310 |
Of storage or retrieval information signal
| 111 |
369530250 |
Of transducer assembly mechanism
| 67 |
369530370 |
Initialization or start-up mode or changing system mode: | 5 |
20080310276 | Method and apparatus of recording information in reduced waiting time - A method, apparatus and computer-readable recording medium are disclosed, for recording information in an information recording medium. The method includes a first step of outputting, in response to an initialization request for initializing the information recording medium, termination information indicative of termination of the initialization before the initialization starts, and a second step of starting the initialization at a predetermined timing after the output of the termination information. In this procedure, it is possible to start to record data in a blank disc sooner than in conventional methods. | 12-18-2008 |
20120063283 | OPTICAL DISC DRIVE AND CONTROL METHOD THEREOF - A control method of an optical disc drive includes steps of: detecting data transmission is being performed between the computer system and the optical disc drive or not; stopping supplying an operating voltage to the optical disc drive if data transmission not being performed; determining whether or not an eject switch is being pressed according to a variation in potential on a shared line when a first logic level is detected, and supplying the operating voltage to the optical disc drive if a press on the eject switch is detected and after a predetermined time ejecting a tray from the optical disc drive; and determining whether or not the tray is loaded into the optical disc drive according to a variation in potential on the shared line when a second logic level is detected, and supplying the operating voltage to the optical disc drive if the tray is loaded. | 03-15-2012 |
20140341008 | TESTING DEVICE AND TESTING METHOD FOR TESTING PERFORMANCE PARAMETER OF DISC PLAYER - A testing device for testing performance parameters of a disc player includes a display, and a storage that records a plurality of types of different discs, a plurality of testing commands each corresponding to a type of discs, and a reference value range of each of performance parameters of the disc player. The testing command corresponding to the type of a disc is obtained to be executed by the disc player to obtain a value of each performance parameter of the disc player. The testing device determines whether the disc player is qualified or not according to the obtained value. | 11-20-2014 |
20140355405 | DISC DRIVE TESTING SIGNAL GENERATION DEVICE AND RELATED METHOD - A testing signal generation device for testing performance of a disc drive includes a signal generating unit, a signal converting unit, and a signal transmitting unit. The signal generating unit generates at least one pulse signal for controlling the disc drive to work at predetermined working modes. The signal converting unit converts the at least one pulse signal into at least one test signal. The signal transmitting unit transmits the at least one test signal to the disc drive, to control the disc drive to read data from an optical disc in the disc drive. A testing signal generation method for testing performance of the disc drive is also provided. | 12-04-2014 |
20160012843 | SYSTEMS AND PROCESSES FOR EFFICIENTLY STORING AND RETRIEVING VIDEO CONTENT | 01-14-2016 |
369530300 |
Of relative motion producing mechanism | 3 |
20090175146 | Data Recording/Reproducing Method and Apparatus - A data recording/reproducing method and apparatus which are capable of accurately and stably controlling a gap between a recording medium and a head of the data recording/reproducing apparatus are disclosed. The data recording/reproducing method includes: outputting at least one signal based on a light beam reflected from a recording medium; detecting a minimum value and a maximum value of the output signal; and adjusting a gap between a head of a data recording/reproducing apparatus and the recording medium according to the minimum value and the maximum value. | 07-09-2009 |
20090252009 | POSITIONING CONTROL UNIT AND OPTICAL DISK DRIVE - A position-error-signal calculation circuit ( | 10-08-2009 |
20100074076 | WOBBLE SIGNAL DETECTOR INCLUDING THE SIGNAL PROCESSOR, OPTICAL DISK APPARATUS INCLUDING THE WOBBLE SIGNAL DETECTOR AND READ-WRITE OPTICAL DISK DRIVE INCLUDING THE WOBBLE SIGNAL DETECTOR - A signal processor includes an operational amplifier performing an operation on first and second signals, and amplifying a signal resulting from the operation based on an amplification control signal to remove an offset voltage, a buffer buffering an output signal of the operational amplifier and outputting a result of the buffering as differential signals, an automatic gain amplifier automatic gain amplifying the differential signals output from the buffer and outputting an automatic gain amplified signal as a single ended signal, a level shifter level shifting a level of the single ended signal including the offset voltage and outputting a level shifted signal as level shifted differential signals, and an offset voltage compensation unit converting a difference between the level shifted differential signals to a digital signal, detecting the offset voltage based on the digital signal, and outputting the amplification control signal to compensate for the detected offset voltage. | 03-25-2010 |
Entries |
Document | Title | Date |
20080212430 | Method and System for Scanning an Information Carrier Via One-Dimensional Scanning - A system for reading an information carrier having a data layer ( | 09-04-2008 |
20080225659 | Information Recording Apparatus and Method, and Computer Program - A disc-shaped information recording medium has a first and a second recording layer. A buffer area is arranged adjacent to a recording area of each of the layers for preventing deviation of the recording position onto/from each of the layers. A first part of the information is written along a first track path on the first recording layer, a predetermined amount of first buffer data in a part of the buffer area of the first recording layer is written into the first recording layer, and inter-layer jump is performed from the first recording layer to the second recording layer. A predetermined amount of second buffer data in the buffer area of the second recording layer is written in the second recording layer and write element is controlled to write a second part of the information to be recorded, on the second recording layer by changing the recording direction. | 09-18-2008 |
20080225660 | Optical disc drive, optical storage medium, optical storage medium inspection apparatus, and optical storage medium inspection method - This optical disc drive has an optical pickup head that emits a light beam to an optical storage medium, detects the light beam reflected from the optical storage medium, and outputs a signal based on the received reflected light; a jitter measuring unit for measuring jitter in signals output from the optical pickup head; and an evaluation unit for determining from the measured jitter if the optical storage medium is good or defective. The jitter measuring unit measures jitter in a train of 3T or longer marks or spaces from an optical storage medium to which digital information is recorded as a train of marks or spaces of length kT based on a period T and an integer k of two or more. | 09-18-2008 |
20080279069 | Optical Disk Apparatus With Approximate Focus Control of Laser Beam - An optical disk apparatus is constructed for writing or reading information by irradiating a laser beam onto an optical disk while rotating the optical disk under a focus control of the laser beam relative to the rotated optical disk. In the optical disk apparatus, an irradiating section is operated to irradiate a laser beam onto the optical disk. A determining section determines a process pattern of the focus control by operating the irradiating section to irradiate the laser beam onto a predetermined area of the optical disk and by monitoring the laser beam reflected back from the predetermined area. A focusing section performs the focus control to regulate a spot diameter of the laser beam based on the determined process pattern during either of the writing or reading of information. | 11-13-2008 |
20090003164 | Fast Disc Recognition by Elimination of Calibrations - A method and a device for fast disc recognition for use in read/write performances when an optical disc is connected to an optical drive, including the provision of a set S of parameters for safe data transfer between the drive and the disc, the direct calibration during a disc recognition step only of those parameters out of said set S in need of a direct calibration, the start of a read/write data transfer sequence after said disc recognition step is finalized and the calibration of the remaining parameters at first after or during one or more data transfer read/write sequences. | 01-01-2009 |
20090003165 | METHOD AND APPARATUS FOR GENERATING SYNCHRONOUS CLOCK FOR WRITE OPERATION IN A DISK DRIVE - According to one embodiment, a disk drive configured to write data to a disk being rotated by a spindle motor has a synchronous clock generator that generates a synchronous clock to use during the write operation. The synchronous clock generator inputs the rotational acceleration of the spindle motor, as feed-forward control value, to the feedback control system provided in the drive disk, thereby generating a clock that is synchronous with the rotational speed of the disk. | 01-01-2009 |
20090003166 | OPTICAL DISK REPRODUCTION APPARATUS AND OPTICAL DISK REPRODUCING METHOD - According to one embodiment, a reproduction apparatus includes an execution unit configured to execute an advanced application, a detection unit configured to detect a series of keys which are operated by a user while the advanced application is executed, a recording unit configured to record key macro information formed of the detected series of keys and operation timings of the series of keys, and a key event generating unit configured to read the key macro information recorded by the recording unit and to generate a series of key events corresponding to the series of keys at the operation timings. | 01-01-2009 |
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 |
20090052288 | DISTANCE MEASURING APPARATUS - A distance measuring apparatus for measuring a distance to a target point in a target area comprises a laser oscillator for generating a laser beam having a first wavelength, a nonlinear crystal into which the laser beam having the first wavelength generated by the laser oscillator enters, the nonlinear crystal generating a laser beam having a second wavelength, a collimator lens at which the laser beam having the first wavelength generated by the laser oscillator and the laser beam having the second wavelength generated by the nonlinear crystal are concentrated and are transformed into parallel light flux, a laser device provided with the laser oscillator, the nonlinear crystal, and the collimator lens, an output unit for outputting the laser beam having the first wavelength and the laser beam having the second wavelength at the same time, which are emitted by the laser device, while scanning the target area, a selective reflective mirror for selectively reflecting the laser beam having the first wavelength and the laser beam having the second wavelength that are reflected at the target point in the target area, a first light receiving unit which receives the laser beam having the first wavelength selected at the selective reflective mirror and outputs a first signal, a second light receiving unit which receives the laser beam having the second wavelength selected at the selective reflective mirror and outputs a second signal, and a signal processing unit for measuring the distance to the target point in the target area by selecting one of the first signal and the second signal. | 02-26-2009 |
20090073836 | Disk decision method and optical disk drive using the disk decision method - A method of determining the type of disk loaded on an optical disk drive, and an optical disk drive using the method are provided. The disk decision method includes operations of detecting a change in the magnitude of a focus error signal generated during a focus search for a recording layer of a disk closest to an outermost layer of the disk, wherein the change in the magnitude of the focus error signal depends on a change in a recording layer of the disk for which aberration correction is performed, and determining a recording layer architecture of the disk according to the detected change in the magnitude of the focus error signal. | 03-19-2009 |
20090116354 | Recording parameter setting device, program thereof, computer-readable recording medium containing the program, information recording medium, recording/reproducing device, and recording parameter setting method - A recording parameter setting device including a trial recording parameter setting section and a reproduced signal quality judging section. The reproduced signal quality judging section judges whether or not a reproduced signal obtained by reproduction of the trial recording carried out in accordance with the trial recording parameter satisfies a predetermined reproduced signal quality. If no, the recording parameters of the predetermined recording mark length or longer are further classified into detailed groups and trial recording is carried out again. If the reproduced signal satisfies the predetermined reproduced signal quality, the reproduced signal quality judging section sets the trial recording parameters as a recording parameter. This makes it possible to form a recording mark capable of surely providing a good reproduced signal quality while the number of recording parameters to be used is reduced. | 05-07-2009 |
20090213711 | METHODS APPLIED TO OPTICAL STORAGE MEDIUM FOR IDENTIFYING BOUNDARY BETWEEN AREAS STORING INFORMATION WITH DIFFERENT CHARACTERISTICS - A method applied to an optical storage medium for identifying a boundary between a first area and a second area is provided. The first area and the second area store information with different characteristics. The method includes moving an optical pickup unit in a radial direction for accessing the optical storage medium to generate a read-back signal, generating a feature signal according to the read-back signal detecting the feature signal to generate a plurality of detection values successively, dynamically selecting a plurality of monitored values from the detection values while the optical pickup unit is accessing the optical storage medium, and identifying the boundary between the first area and the second area according to the monitored values. | 08-27-2009 |
20090245054 | METHOD AND DEVICE FOR ENHANCED ROBUSTNESS OF NEAR-FIELD OPTICAL SYSTEMS - The invention comprises a method and device for application in a near-field optical system such that the robustness of the optical system and the system performance are enhanced. Use or threshold values, in combination with signals already present in the system, facilities protection by implementation of corrective actions to be taken in the event of the distance between refractive element and record carrier being determined to be outside threshold boundaries. | 10-01-2009 |
20100027395 | OPTICAL DISK DEVICE AND OPTICAL DISK PROCESSING SYSTEM HAVING OPTICAL DISK DEVICE - An optical disk device which quickly detects that a transparent disk is loaded is provided. When an optical disk is loaded, a drive controller of an optical disk device drives a spindle motor and checks existence of an optical disk based on a driving result. In addition, the drive controller drives an optical pickup to apply a focus control, to detect whether or not focusing is possible. When it is determined from the driving result that there is an optical disk and that focus is not possible, the drive controller judges that the optical disk (D) is a transparent disk. | 02-04-2010 |
20100039912 | OPTICAL INFORMATION RECORDING/REPRODUCING UNIT AND METHOD OF MEASURING RECORDED-MARK QUALITY - An equalizer ( | 02-18-2010 |
20100135138 | OPTICAL DISK DRIVE AND METHOD OF DETERMINING WRITE STRATEGY THEREOF - An optical disk drive, and a method of determining a write strategy thereof. In the method of determining a write strategy of an optical disk drive where a mark and a space are formed on an optical disk by a laser beam to display write information and information is written or reproduced, write quality is evaluated by combining at least two of power- and pulse-based parameters defining a writing multi pulse, and the at least two parameters are changed on a 2-dimensional matrix. The power- and pulse-based parameters indicating specific write quality are determined as strategy parameters, based on evaluated results of the write quality. | 06-03-2010 |
20100142348 | OPTICAL INFORMATION MEDIUM MEASUREMENT METHOD, OPTICAL INFORMATION MEDIUM, RECORDING APPARATUS AND REPRODUCING APPARATUS - An optical information medium measurement method of the present invention, for measuring a degree of modulation in an optical information medium of a multilayered structure having a plurality of information layers, includes a first step of measuring the modulation degree of each layer of the optical information medium, by use of a measurement optical system, a second step of obtaining a thickness between layers of the optical information medium, a third step of obtaining a reflectance of each layer of the optical information medium, and a fourth step of converting the modulation degree of each layer, the modulation degree being measured in the first step, into a modulation degree at a reference optical system differing from the measurement optical system, based on a value indicative of the thickness between layers, the thickness being obtained in the second step, and a value indicative of the reflectance of each layer, the reflectance being obtained in the third step. | 06-10-2010 |
20100188951 | ENCODING DEVICE, SYSTEM AND METHOD - The disclosure provides an encoding device comprising a reflector, a rotating disk having at least one aperture; and an optical unit comprising a light emitter and a light detector. Said disk being positioned between said reflector and said optical unit whereby rotation of said disk causes the movement of said at least one aperture in an alternating manner into a path of said light, such that said path is periodically interrupted and reestablished. | 07-29-2010 |
20100220568 | SIGNAL MEASUREMENT APPARATUS AND BEAM MODULATION APPARATUS USED THEREIN - An apparatus for modulating an incident beam includes a body that is non-transmissive and rotatable about an axis perpendicular to a surface of the body. The body has a first set of features including transmissive features with respect to the incident beam along a first radial path at a first radial distance from the axis and a second set of features including data storage features along a second radial path at a second radial distance from the axis. The apparatus also includes a reference sensor disposed over a first position along the second radial path. In the apparatus. the radial distances are different and the numbers of transmissive features and data storage features are relatively prime. When the body is rotating, the first set of features modulate the incident beam and the reference sensor generates a reference signal based on the data storage features traversing the first position. | 09-02-2010 |
20100296378 | CALIBRATION CIRCUIT AND METHOD THEREOF FOR DATA RECOVERY - A calibration circuit and a calibration method thereof for data recovery are provided. The calibration circuit includes an amplitude detector, a period detector, and a compensation circuit. The amplitude detector samples amplitudes of a data signal according to a zero-crossing signal and outputs an amplitude signal accordingly. The period detector counts a clock signal according to the zero-crossing signal and outputs a period signal accordingly. The compensation circuit receives the amplitude signal, the period signal, and the data signal. The compensation circuit adjusts a phase of the data signal by calculating differences between a reference signal and the amplitude signal and between the reference signal and the period signal and outputs a calibrated data signal accordingly. Accordingly, a better recognition performance on the data signal is achieved by calibrating the data signal in real-time. | 11-25-2010 |
20100315926 | HFM ENABLE CONTROL SYSTEM - A modulation control system for use with a high frequency modulator is described. This system comprises a latch for selectively receiving enable signals, wherein the latch transmits a latched signal in response to receiving at least two of the enable signals; a selection device coupled to the latch for receiving the latched signal, a voltage source, and a terminal for receiving at least one of the enable signals, wherein the selection device transmits a selected signal; and a logic device coupled to the selection device and a terminal for receiving a modulated enable signal, wherein the logic device transmits a synchronized signal for either enabling or disabling the high frequency modulator in response to receiving the selected signal associated with at least one of the enable signals. | 12-16-2010 |
20110149704 | SIGNAL EVALUATION METHOD AND SIGNAL EVALUATION APPARATUS - A signal evaluation method according to the present invention is a method for evaluating a read signal, retrieved from an information recording medium, based on a binarized signal generated from the read signal by a PRML method. The method includes the steps of: detecting the patterns of multiple paths associated with the binarized signal and merging into the same state; getting the ideal value of a correct pattern associated with the binarized signal and that of an erroneous pattern that is similar to, but different from, the correct pattern; calculating the difference between a distance from the ideal value of the correct pattern to the read signal and a distance from that of the erroneous pattern to the read signal; calculating, based on the difference, an expected error rate for each predetermined group of patterns by the PRML method; and calculating a standard deviation that is associated with a total error rate, which is obtained by adding together the error rates of the predetermined groups of patterns, and that is used for evaluating the read signal. | 06-23-2011 |
20110222385 | APPARATUS AND METHOD FOR TESTING SPOKE SENSOR - An apparatus and a method for testing spoke sensor are disclosed. A drive unit is started to rotate a test disc to a predetermined rotation speed. A module test unit is electrically connected to a spoke sensor under test of a spindle motor module. The module test unit is started to drive the spoke sensor to detect the spoke signals of the test disc and record the number of detected spoke signals. Within a test time, a comparison unit is used for comparing the number of spoke signals with a threshold, and only when the detected number is larger than a threshold will the spoke sensor be assembled to the product. Thus, the product quality is assured. | 09-15-2011 |
20110242953 | Systems and Methods for Testing Unformatted Optical Recording Media - Various embodiments herein include one or more of systems, methods, software, and/or data structures to test and evaluate unformatted optical media such as optical tape and optical discs. Advantageously, testing and evaluation can be performed earlier in the manufacturing process of the optical media to locate defects and/or other problems or issues with the optical media that can be addressed before additional manufacturing steps are performed and possible wasted. The systems and methods include at least two optical pickup units (OPUs), a first of which may be dedicated to writing digital data and the second of which may be dedicated to scanning, locating, tracking and/or reading the written data (when the optical media is moving in a first direction) in one of a plurality of manners. Information (e.g., optical signals such as sum, differential push pull and focus error signals) associated with the writing, scanning and retrieving of data at one or more locations or segments of the optical media may be used part of an analysis of one or more properties (e.g., signal to noise, signal jitter, thickness, roughness) of the optical media. | 10-06-2011 |
20120263026 | METHOD FOR DETERMINING ECCENTRICITY OF OPTICAL DISC - A method for determining an eccentricity of an optical disc is provided. The method includes predetermining a plurality of optical disc with known eccentric distances, respectively measuring a ratio of maximum and minimum amplitudes of a tracking error signal of the optical discs, establishing an eccentric distance ratio table or curve, measuring a ratio of maximum and minimum amplitudes of the tracking error signal for an optical disc under test, and comparing the measured ratio with the table or curve to promptly determine the eccentricity distance of the optical disc under test. | 10-18-2012 |
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 |
20140169148 | DISC PLAYER AND BURN-IN TEST METHOD FOR DISC PLAYER - A disc player plays a test disc to perform a burn-in test. The disc player includes a driving unit, a timing unit, storage, an input unit and an output unit. The driving unit plays the test disc and generates a first timing signal when begin to play the test disc. The timing unit counts the duration of the burn-in test from a default value in response to the start signal. The storage stores the duration counted by the timing unit in real time. The input unit generates an output signal in response to a first user operation. The output unit outputs the stored duration in response to the output signal. | 06-19-2014 |
20140347967 | TESTING DEVICE AND TESTING METHOD FOR TESTING PERFORMANCE OF DISC PLAYER - A testing device for testing performance parameters of a disc player which includes a display, and a storage. The storage at least one sector table associated with a disc in the disc player, each sector table recording sector information corresponding to a plurality of physical sectors of the disc, a testing command associated with each physical sector, and a reference value range of each of performance parameters of the disc player. The testing command corresponding to the physical sector of the disk is obtained to be executed by the disc player to obtain a value of each performance parameter of the disc player. The testing device determines whether the disc player is qualified or not according to the obtained value. | 11-27-2014 |