| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 369440260 | Servo system operation related to disc structure information format | 37 |
| 20080219110 | WOBBLE INFORMATION RECORDING METHOD, INFORMATION RECORDING MEDIUM, AND RECORDING AND REPRODUCTION METHOD AND APPARATUS THEREOF - An optical disk and a method for identifying the optical disk are provided which make it possible to identify a recording system of the optical disk easily in a short time by a recording and reproduction apparatus when a groove-recording system and a land-recording system are both employed in one kind of optical disk, for, example, a BD-R. Specifically, the polarity upon reproducing the wobble information is made to be the same in both of the optical disk of groove-recording system and the optical disk of land-recording system. The recording system of the optical disk that shows the same wobble polarity irrespective of the recording system can be easily detected by finding a tracking polarity that can recognize the wobble information by changing the tracking polarity, whereby the start-up time of the recording and reproduction apparatus can be shortened. | 09-11-2008 |
| 20080232205 | Recording Type Optical Disc Medium and Optical Disc Device for the Same - An optical disc medium ( | 09-25-2008 |
| 20080232206 | TRACK DETERMINATION - A light beam is scanned on a track of a recording medium, the track having a first track region and a second track region, each track region having a physical property that has recurring deviations. A wobble signal is derived from the light beam, the wobble signal having information associated with the recurring deviations. Whether the light beam is at the first track region or the second track region is determined based on a frequency, a period, or a pulse width of the wobble signal. | 09-25-2008 |
| 20080267023 | Information recording medium - An optically detectable information recording medium is at least comprised of a substrate and a recording layer, wherein a surface of the recording layer opposite to another surface of the recording layer in contact with the substrate has a Root Mean Square roughness Rσ of less than 5 nm, and wherein the recording layer has dye recording material selected from cyanine dye, phthalocyanine dye, naphtalocyanine dye, azo dye, naphtoquinone dye, fulgide dye, polymethyne dye, and acridine dye. | 10-30-2008 |
| 20080285396 | Method and Apparatus of Formatting a Three Dimensional Optical Information Carrier - A method of formatting at least one optical information carrier is provided. The method is aimed at creating a plurality of formatting marks that are to be sequentially addressed when reading recording information in the carrier. The method comprises recording the plurality of formatting marks within the carrier volume in an interleaved order, thereby reducing delays in recording locally adjacent formatting marks thus reducing the entire carrier formatting time. | 11-20-2008 |
| 20090086592 | OPTICAL DISC APPARATUS SWITCHING FOCUS POINT BETWEEN LAYERS - A focus jump technique enables focus control on recording layers of a disc in such a manner that its effect is not absorbed by disturbance or a variation in the movement speed of an objective lens. The technique involves monitoring level of a focus error signal and rejecting noise from the error signal. A speed sensor detects movement speed of an objective lens; and a speed control circuit generates a voltage for controlling the objective lens, based on the detected movement speed. Movement speed of the objective lens is detected during focus jump, a corresponding lens drive signal is generated, and an end position is determined from behavior of the error signal immediately before the end of the jump. A focus control is pulled, from a focus point corresponding to one recording layer, into a focus point corresponding to another recording layer forcibly in a stable manner. | 04-02-2009 |
| 20100034060 | OPTICAL DISC COMPRISING A WATERMARK AND A METHOD AND RECORDER FOR RECORDING SUCH A DISC - A visible pattern is obtained by modulating the digital sum value. Because the digital sum value modulation allows the choice of several different channel bits groups between DC control points, the selection of a group of channel bits resulting in a change of reflection. This creation of a visible pattern is highly suitable for Blueray as the parity preserving property of the channel code guarantees disparity inversion by the DC-control bit, which keeps the DSV excursions between hard limits. As a result only small DSV deliberate variations are required to produce a visual watermark, which will not deteriorate the bit-detection margin of the optical disc. | 02-11-2010 |
| 20100309759 | RECORDING AND REPRODUCING METHOD, RECORDING AND REPRODUCING DEVICE AND RECORD CARRIER - A recording and reproducing method for recording and/or reproducing information from a record carrier that comprises a plurality of recording layers layered in its film thickness direction and a guide layer having a plurality of tracks carrying tracking servo information, wherein a record mark is formed on each recording layer of the record carrier. The method comprises: a focusing step of converging a servo light beam onto the guide layer as well as selectively converging a main light beam group onto one of the recording layers through a common objective lens, wherein the main light beam group comprises a plurality of main light beams neighboring each other; a tracking step of performing a positioning control of the objective lens so that the servo light beam is tracking on one of the tracks; and a recording and/or reproducing step of performing recording and/or reproducing information with the main light beam group while performing the focusing step and the tracking step. When the servo light beam traces on one of the tracks neighboring each other, one trace group is composed of the main light beam group on the one of the recording layers, wherein, when the servo light beam traces on the other of the tracks neighboring each other, the other trace group is composed of the main light beam group on the one of the recording layers, wherein an interval between the one trace group and the other trace group is larger than an average trace pitch within the trace group. | 12-09-2010 |
| 20110128833 | OPTICAL DRIVE DEVICE - An optical drive apparatus that reproduces an optical disk having a land and a groove, the optical drive apparatus including a first tracking-error-signal generating unit that generates a first tracking error signal by using a DPD method, a second tracking-error-signal generating unit that generates a second tracking error signal by using a DPP method, a tracking servo unit that controls the optical system, and a determining unit that determines that an irradiation point of an optical beam is in a non-recorded area. The tracking servo unit switches over to a control based on the second tracking error signal in response to a result of determination by the determining unit during performing a control based on the first tracking error signal. | 06-02-2011 |
| 20110158063 | OPTICAL DISC DEVICE AND DATA REPRODUCTION METHOD FOR THE SAME - Prevention of deletion of data in an unintended recording layer of an optical disc is ensured even when servo deviation occurs while controlling data reproduction. A light source outputs a light beam with light intensity according to a driving current on which a high frequency signal is superimposed. The light beam is collected on a recording layer of an optical disc. As triggered by detection of servo deviation during data reproduction, a light intensity controller adjusts a superimposed amount of the high frequency signal in the driving current to suit to a specific recording layer with the lowest reproduction tolerance in the optical disc and thereby controls the light intensity of the light beam output from the light source. | 06-30-2011 |
| 20110170385 | OPTICAL DISC DRIVE - An optical disc drive according to the present invention can write information on an optical disc, which includes a substrate on which a number of pre-pits | 07-14-2011 |
| 20110170386 | OPTICAL DISC DRIVE - An optical disc drive according to the present invention includes an optical pickup and a writing control section for instructing the optical pickup to record a mark, representing the information to be written, on the optical disc. In recording the mark on the optical disc, the writing control section instructs the optical pickup to irradiate the same area on the optical disc with a light beam a plurality of times so that the mark is recorded in that repeatedly irradiated area. | 07-14-2011 |
| 20110170387 | OPTICAL DISC APPARATUS AND CONTROL METHOD IN THE SAME - An optical disc apparatus and a control method for the optical disc apparatus are provided. A control method for an optical disc apparatus according to one embodiment of the present invention may comprise rotating a disc through a spindle motor if a type of a disc loaded in the optical disc apparatus is determined; and carrying out servo operation which can be processed irrespective of rotation speed of the disc while checking whether the rotation speed of the disc equals a predetermined speed. Servo operation which can be processed independently of the rotation speed of the disc can correspond to operation related to focusing servo and additionally to operation related to tracking servo. Therefore, since the time the user has to wait for requested video, music, or data to be extracted after the user has inserted a medium is reduced, user convenience can be improved. | 07-14-2011 |
| 20110188358 | OPTICAL DISK DRIVE DEVICE AND ADDITIONAL RECORDING METHOD - Disclosed herein are an optical recording medium driving device and an additional recording method, which performs tracking servo control for moving an objective lens in a direction orthogonal to a tangential direction of a guide track so that a guide tracking error signal is decreased with respect to a guide track of a guide layer separation type recording medium, detects an additional recording start position subsequent to a recorded track if the recorded track is present in a recording layer of the optical recording medium, generates a tracking correction signal according to the reproduction tracking error signal upon tracking servo control of the recorded track just before the additional recording start position, and corrects tracking servo control according to the tracking correction signal upon additional recording start. | 08-04-2011 |
| 20110205868 | OPTICAL RECORDING MEDIUM AND OPTICAL RECORDING-READING METHOD - Efficient recording and reading are achieved in an optical recording medium including servo layers and recording and reading layers. The optical recording medium includes: a first servo layer having a projection and a depression for tracking control that are formed in a first spiral direction; a second servo layer having a projection and a depression for tracking control that are formed in a second spiral direction opposite to the first spiral direction; and a plurality of recording and reading layers having a flat structure with no projection and depression for tracking control. Information is recorded on each of the plurality of recording and reading layers while tracking control is performed using the first servo layer or the second servo layer. | 08-25-2011 |
| 20110205869 | OPTICAL RECORDING-READING METHOD AND OPTICAL RECORDING MEDIUM - An optical recording and reading method is provided in which the information necessary for recording and reading layers is quickly acquired to reduce the seek time during reading and recording. The optical recording and reading method is used for an optical recording medium that includes a plurality of recording and reading layers and a servo layer. Information is recorded on or read from the recording and reading layers by irradiating them with a recording and reading beam while the servo layer is irradiated with a servo beam to perform tracking control. When information is recorded on the recording and reading layers, control information necessary for subsequent recording and reading to be performed on the recording and reading layers is recorded on the servo layer | 08-25-2011 |
| 20110205870 | OPTICAL RECORDING MEDIUM AND OPTICAL RECORDING-READING METHOD - An optical recording medium including recording and reading layers and a servo layer increases the recording capacity thereof. In the optical recording medium including the plurality of recording and reading layers and the servo layer, the servo layer has a groove and a land that can be used to perform tracking control with a long-wavelength servo beam. Information is recorded on the recording and reading layers with a recording and reading beam having a wavelength shorter than the wavelength of the servo beam. Recording marks are formed on the recording and reading layers while both the groove and land are tracked. | 08-25-2011 |
| 20110205871 | OPTICAL DISC DRIVE AND METHOD OF CONTROLLING THE SAME - An optical disc drive for reading or writing information on a multilayer optical disc having three or more recording layers by irradiating the disc with a light beam includes an optical pickup for irradiating the disc with the light beam, a recording state detector for detecting data recording states at a start point of a focus jump, a transit point or transit points on a recording layer or recording layers to be passed through, and an expected landing point of a focal point of the light beam in a focus jump, and a controller for moving the optical pickup to a position where the recording states are the same at all of the start point, the transit point(s) on the recording layer(s) to be passed through, and the expected landing point if the recording states are different among those points, before starting the focus jump. | 08-25-2011 |
| 20110222380 | OPTICAL DISC APPARATUS, OPTICAL DISC, RECORDING METHOD, AND REPRODUCTION METHOD - It takes time to read management information and the like from a recording layer in starting reproduction of an optical disc, thus posing a problem of poor usability. Moreover, a light beam needs to be largely moved in a radial direction in recording or reproducing the next layer, thus posing a problem that the time to interrupt recording or reproduction increases. The above-described problems can be resolved by enabling a reference layer to be recorded and reproduced, and recording disc management information and the like in this reference layer, and reproducing this information. Moreover, the reference layer comprises two layers having the spiral directions of the track different from each other, and the reference layer, on which a light beam is focused, is changed according to a layer to be recorded or reproduced in the recording layer. | 09-15-2011 |
| 20110255385 | SYSTEM COMPRISING AN OPTICAL DISC AND AN APPARATUS FOR READING OF RESPECTIVE DATA - The optical disc comprises a substrate layer and a data layer disposed on the substrate layer, the data layer having a mark/space data structure arranged in tracks which are arranged in groups being separated each by a land section. The tracks of the groups are each arranged as a spiral, and the start of a track of a consecutive group begins at a position corresponding with the end of a track of a preceding group. A group comprises advantageously an inner track, a center track and an outer track. The optical disc comprises in a preferred embodiment a nonlinear layer with a super-resolution structure and the track pitch between neighboring tracks within a group is below the diffraction limit of a corresponding pickup for reading of data. Further, a tracking method is described which does not rely on tracking offsets to detect the inner and outer tracks of a group. | 10-20-2011 |
| 20110305122 | RECORDING DEVICE AND RECORDING METHOD - A recording device performs recording on an optical disc recording medium having a reference face having a reflection film provided with a position guide, and a recording layer provided at a position of a depth different from that of the reference face and performing information recording by mark forming according to irradiation of light. The recording device includes a light generating and irradiation unit, a recording unit, a tracking mechanism, a first tracking error signal generating unit, a second tracking error signal generating unit, a tracking servo control unit, and a control unit. | 12-15-2011 |
| 20120057442 | INFORMATION RECORDING MEDIUM, AND METHOD AND APPARATUS FOR RECORDING A SIGNAL THEREON - A disc-shaped information recording medium includes a laminate of recording layers on and from which an information signal can be optically recorded and reproduced from one side of the medium. Data areas are provided in the recording layers, respectively. The information signal can be recorded on and reproduced from the data areas while a laser beam emitted from an optical pickup is applied to the data areas. Optical recording test areas are provided in the recording layers, respectively. A test signal can be recorded on and reproduced from the optical recording test areas to decide optimum power values of the laser beam for signal recording. The test areas are out of overlap as viewed in a direction of propagation of the laser beam. | 03-08-2012 |
| 20120106308 | OPTICAL RECORDING MEDIUM AND RECORDING DEVICE - An optical recording medium in which recording is performed by a recording device that is configured such that tracking servo control of recording light is performed by irradiating the recording light and ATS light for an adjacent track servo and by an adjacent track servo based on reflected light of the ATS light, wherein while a recording layer in which a mark is formed according to an irradiation of the recording light is included, a mark row is formed in advance by a pitch that is twice a distance between an irradiation spot of the recording light and an irradiation spot of the ATS light or greater in the recording layer. | 05-03-2012 |
| 20120113777 | RECORDING APPARATUS AND RECORDING METHOD - A recording apparatus includes: a light illumination and light sensing unit configured to illuminate an optical disc recording medium including a reference surface having address information recorded and a recording layer, with recording light and light for position control; a recording unit which performs recording on the recording layer; and a control unit which controls, when data instructed to be recorded is to be recorded from an instructed recording start address, the recording unit to perform recording of dummy data on an area adjacent to a front side at least from the recording start address over a range of equal to or greater than the maximum spot deviation amount between an illumination spot of the light for position control and an illumination spot of the recording light and to perform recording of the data instructed to be recorded in succession to a recorded area of the dummy data. | 05-10-2012 |
| 20120127841 | PICKUP DEVICE AND OPTICAL DISC DRIVE ADOPTING THE SAME - Provided are a single beam optical pickup device and a disc drive including the optical pickup device. The optical pickup device includes a light controlling device that prevents or limits stray light generated from a medium from being incident on a light sensor. The light controlling device may further include an additional auxiliary light sensor so as to reuse effective light among diffracted light. | 05-24-2012 |
| 20120195177 | DISC DRIVE AND TRACKING SERVO PULL-IN METHOD - A disc drive includes an optical pickup that emits laser light to a predetermined layer position via an objective lens and detects reflection light of the laser light, a tracking mechanism that drives the objective lens in a tracking direction, a tracking error signal generation unit that generates a tracking error signal, based on a light detecting signal for the reflection light obtained by the optical pickup, a tracking servo control unit that performs a tracking servo control based on the tracking error signal, and a control unit that makes the tracking servo control unit perform tracking servo pull-in on the basis of a frequency measurement result of the tracking error signal and a recording or non-recording determination result based on the light detecting signal. | 08-02-2012 |
| 20120300602 | OPTICAL INFORMATION PROCESSING DEVICE AND TRACKING CONTROL METHOD THEREOF - An optical information device used with a grooveless multilayer disc including multiple recording layers used to record and reproduce information signals and a guide layer dedicated to detect tracking error signals (TES) can always stably detect the TESs when the distance between the recording layer and guide layer varies due to selection of a target recording layer. For example, a plurality of light spots for detecting the TESs are formed by a holographic grating on the guide layer, but are defocused with respect to each other. The TESs are detected individually from the respective light spots. The TESs are subjected to an addition operation to be a signal for tracking control, thereby extraordinary increasing the defocus dynamic range of the TESs. | 11-29-2012 |
| 20130201806 | INFORMATION RECORDING MEDIUM, INFORMATION RECORDING APPARATUS AND METHOD, AND INFORMATION REPRODUCING APPARATUS AND METHOD - An information recording medium adopting a zone CAV method is provided with: a guide layer in which tracks are formed in advance; and a plurality of recording layers laminated on the guide layer. On the tracks, a plurality of guide areas, each of which has a physical structure for carrying guide information for guidance, are arranged discretely at arrangement intervals of predetermined distance or less which is set in advance in a track direction and are shifted between a plurality of tracks throughout the plurality of tracks which are adjacent to each other in a radial direction. On the tracks, moreover, a plurality of specific areas, each of which has a predetermined pattern, are respectively arranged in a same phase from an inner circumference to an outer circumference in the radial direction such that the predetermined pattern can be detected in a state in which tracking servo is open. | 08-08-2013 |
| 20130250743 | MULTILAYER OPTICAL RECORDING MEDIUM, DRIVE DEVICE, REPRODUCING AND RECORDING APPARATUS, AND INSPECTION METHOD FOR MULTILAYER OPTICAL RECORDING MEDIUM - According to one embodiment, a multilayer optical recording medium including a substrate, a guide layer group that is provided on the substrate and has guide layers in which positional information in a radial direction is recorded, and a recording layer group that is provided on the substrate and has recording layers in which information can be recorded. In the recording layer group, positional information of the recording layers associated with the positional information recorded in the guide layers and control information of the optical device where reflected light volumes of the laser beams on the guide layers and the recording layers become maximum at the positions in the radial direction are recorded at the positions in the radial direction of the recording layers. | 09-26-2013 |
| 20130258827 | OPTICAL DISK, FORMAT PROCESSING METHOD FOR THE SAME, RECORDING METHOD FOR THE SAME, AND OPTICAL DISK DEVICE - An optical disk that enables a laser beam to be focused on an object track without making mistakes, an optical disk device, a format processing method, and a recording method. The optical disk shall be configured to has a guiding layer with a physical groove structure containing address information and a single or multiple recording layers with no groove structure, in which the guide areas for recording the address information thereon are formed along a track of the guide layer at fixed intervals in a user data area of each recording layer. An address for the recording layer is generated based on information obtained from the guide layer, and the address for the recording layer is recorded in the guide area. | 10-03-2013 |
| 20130343169 | RECORDING APPARATUS, RECORDING METHOD, AND SPARING DESTINATION SELECTING METHOD - A recording apparatus includes: a recording unit to record information by laser irradiation on a recording medium having multiple recording layers where information is recorded, with a track formed in the layers as a continuous recording area and data recorded within a track, and also multiple tracks set to one layer according to recording purpose; and a control unit to determine a sparing destination where information is recorded on a recording position specified according to a recording request, and if sparing processing occurs, as a first priority the next recording address of a track being recorded is selected as a sparing destination, and as a second priority the next recording address of a track overlapped with a track where recording is performed according to the recording request in a layering direction of the layers is selected as a sparing destination, and to cause the recording unit to execute sparing recording. | 12-26-2013 |
| 20140003208 | INFORMATION STORAGE MEDIUM, REPRODUCING METHOD, AND RECORDING METHOD | 01-02-2014 |
| 20140003209 | INFORMATION STORAGE MEDIUM, REPRODUCING METHOD, AND RECORDING METHOD | 01-02-2014 |
| 20140071798 | MULTILAYER INFORMATION RECORDING MEDIUM, AND INFORMATION PLAYBACK METHOD AND INFORMATION RECORDING METHOD EMPLOYING SAME - The purpose of the present invention is to minimize increase in the number of types of medium control information, and increase in time required for OPC, in association with a greater number of recording layers in a multilayer optical information recording medium. Provided is a multilayer optical information recording medium having two or more recording layers, the multilayer optical information recording medium characterized in that the recording layers are classified into layer groups that are fewer in number than the number of recording layers, each of the layer groups so classified being assigned medium control information that is shared within the layer group, and the medium control information assigned to each layer group being pre-registered in an administrative domain. | 03-13-2014 |
| 20140185420 | INFORMATION RECORDING MEDIUM, INFORMATION REPRODUCING APPARATUS, MANAGEMENT INFORMATION REPRODUCING METHOD, INFORMATION RECORDING/REPRODUCING APPARATUS AND IDENTIFICATION INFORMATION REPRODUCING/RECORDING METHOD - According to one embodiment, in an information recording medium including a plurality of data layers, at least one pre-format area is provided on each of the data layers and is circumferentially divided into a plurality of segments. Management information including data layer identification information for identifying the data layers is recorded in at least one of the segments in each of the data layers, using the marks include BCA marks extending radially uniformly. On adjacent ones of the data layers, the BCA marks associated with the management information are recorded in differently positioned segments which are not opposed to each other. | 07-03-2014 |
| 20140286148 | OPTICAL DISC DEVICE - The optical disc device has a circuit which forms a focus error signal for focus servo control based on reflection light from an optical disc exposed to laser light. Also, the device has a data processing unit which can control by feedback a position to which an objective lens is moved by a focusing actuator based on a focus error signal. In label printing, the data processing unit controls, by feedforward, a position to which the objective lens is moved by the focusing actuator based on control data for label printing. The operation resolution of the focusing actuator in feedforward control is made higher than that in feedback control. Thus, an intended position control accuracy is achieved in feedforward control. For instance, in feedforward control, the gain of the driver circuit for the focusing actuator is switched to a smaller one in comparison to that in feedback control. | 09-25-2014 |
| 20160163347 | INFORMATION RECORDING AND PLAYBACK DEVICE - An information recording and playback device includes a recording and playback unit, and a controller. The controller divides a recording area of an optical disk into a first recording area which is at an inner circumference side, and a second recording area which is at an outer circumference side. The controller controls the recording and playback unit such that the unit records or plays back data in the first recording area at a first speed, and records or plays back data in the second recording area at a second speed slower than the first speed. The predetermined radius is set to a boundary between an area in which a control residual exceeds a predetermined reference value when servo control related to focusing and tracking is performed on the recording area of the optical disk, and an area in which the control residual does not exceed the predetermined reference value. | 06-09-2016 |
