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| Number | Title | Issue Date |
| 8174940 | Optical disc apparatus for executing recording or reproducing onto/from a multilayered optical disc having at least 3 layers An optical disc apparatus, for executing recording or reproducing onto/from a multilayered optical disc having “N” pieces of recording layers (N≧3, “N” is an integer), from a first layer to a Nth layer, including a light emitting portion configu... | 05/08/2012 |
| 8111595 | Optical disk recording and playback apparatus and signal detection method utilizing a differential push-pull method and a phase difference method An optical disc recording and playback apparatus includes an optical pickup performing an operation for recording and playing back signal information into and from an optical disc; an optical element allowing a light beam irradiated onto an optical disc by the optic... | 02/07/2012 |
| 8094528 | Method for reading media information from optical recording media A method for reading media information from optical recording media is provided which allows media information to be rapidly and stably read from the recording media. Index marks are successively detected at a plurality of positions spaced at predetermined intervals... | 01/10/2012 |
| 8089833 | Storage device and operating method therefor A storage device including a storage medium for storing data in the form of marks in multiple tracks aligned along track center lines, at least one read transducer for writing and reading said data stored in said storage medium, and an actuator for moving said stora... | 01/03/2012 |
| 8085627 | Lens position control method, lens position control apparatus, cutting method, and cutting apparatus A lens position control method is disclosed. Either an objective lens or a master disc having a resist material film on its substrate is moved, thereby changing a distance between the objective lens and the master disc surface. A return laser beam transmitted throug... | 12/27/2011 |
| 8040764 | Optical disc apparatus and correction servo control signal generation method An optical disc apparatus includes an objective lens that converges a light beam emitted from a light source and irradiates an optical disc having recording marks formed in a uniform recording layer with it, a detection signal generation section that receives a retu... | 10/18/2011 |
| 7965591 | Information recording medium, integrated circuit, recording/playback apparatus, computer program, and information recording/playback method An optical disk 101 in which information is recorded on a groove track, and an optical disk 107 in which information is recorded on a land track. The optical disk 101 has a control data area 102, and a data recording area 103 in which use... | 06/21/2011 |
| 7952964 | Method and apparatus to detect land/groove switch position in seek mode, and optical disk drive using the same A land/groove switch position detecting method includes measuring information about a land/groove switch generation timing of a disc, using a first signal having a frequency that varies in proportion to a rotation speed of the disk in a normal playback mode, and a s... | 05/31/2011 |
| 7903508 | System and method for determining groove/land switching points of an optical disc utilizing a motor rotating signal and original switching points A system for determining groove/land (G/L) switching points of an optical disc is disclosed. The system includes a motor rotating signal generating apparatus, an detection apparatus, and a G/L switching point generating apparatus. The motor rotating signal generatin... | 03/08/2011 |
| 7894311 | Focus servo apparatus A focus servo apparatus for an optical disc apparatus including an objective lens to converge laser beam on an information recording surface of an optical disc, and an actuator to move the objective lens in a focusing direction crossing the information recording sur... | 02/22/2011 |
| 7826314 | Optical disk having wobble patterns representing control information An apparatus for reading subdivided information from an optical disk, which comprises a track groove and on which information is recorded along the track groove is disclosed. The apparatus includes an optical head, which irradiates the optical disk with light and ge... | 11/02/2010 |
| 7821884 | Information recording and retrieval method, and its apparatus Provided is a recording and retrieval apparatus for a multi-layer optical disk. A multi-layer optical disk in which a plurality of recording layers and a single servo layer are combined to form a set is used. A spot for the servo layer and a spot for the recording l... | 10/26/2010 |
| 7817506 | Method of transferring data with respect to an optical information storage medium having different track pitches An optical information storage medium includes a lead-in area, a lead-out area, and a user data area between the lead-in and lead-out areas and in which user data is recorded. Pits are formed in the lead-in area, the user data area, and the lead-out area, and a trac... | 10/19/2010 |
| 7813231 | Optical disc drive apparatus An optical disc drive apparatus has: a rotation angle counter cleared when the number of pulses in a frequency multiplied FG signal has reached a value corresponding to one rotation of the disc; a switching sector detector detecting polarity switching locations base... | 10/12/2010 |
| 7791987 | Recording type optical disc medium and optical disc device for the same An optical disc medium (10) is provided with a data recording area (12) having the spiral recording track (11) and a lead-in area (13) composed of an embossed pit. In the lead-in area (13), information indicating a characteristic r... | 09/07/2010 |
| 7768881 | Medium, apparatus, and method of recording optical-information An optical-information recording medium includes a substrate that includes a servo surface having a servo pattern thereon; an information recording layer laminated on the servo surface of the substrate capable of recording information as a hologram produced by inter... | 08/03/2010 |
| 7738328 | Optical disk apparatus for carrying out a defocus regulation An optical disk apparatus includes: a servo control unit, operable to execute a servo control of focusing based on a focus error signal and to execute a servo control of tracking based on a tracking error signal; a detrack regulating unit, operable to execute a detr... | 06/15/2010 |
| 7719931 | Optical disk device, loop gain setting method, and loop gain setting program An optical disk device is disclosed that includes loop gain adjustment means for finding the first tracking loop gain of a first region, and loop gain estimation means for estimating the second loop gain of a second region on the basis of the loop gain of the first ... | 05/18/2010 |
| 7706216 | Optical head and optical device provided with optical head An optical head includes a plurality of light receiving areas, which receive a first type of reflected rays where zero-order and first-order components of the light diffracted by a track are superposed one upon the other to generate a light quantity signal represent... | 04/27/2010 |
| 7706217 | Optical disc apparatus An optical disc apparatus includes an emitter which emits a laser beam to a optical disc, a divided photodetector including a first divided portion and a second divided portion disposed in a light path of the reflected beam from the optical disc, and producing a fir... | 04/27/2010 |
| 7701813 | Method for recording to and reproducing from an optical recording medium, optical recording medium, and recording and reproduction apparatus for the same A method for recording and reproducing information to/from with an optical recording medium, with which either in-groove recording or on-groove recording is selected according to a type of the recording medium, and information can be recorded and reproduced with goo... | 04/20/2010 |
| 7660209 | Optical disk drive An optical disk drive is designed to read and/or write data from/on a spiral string of tracks where land and groove tracks are alternated. The drive includes: a light source for radiating a light beam; a lens for converging the light beam; a mechanism for moving the... | 02/09/2010 |
| 7643387 | High-density read-only optical disc, and optical disc apparatus and method using the same A high-density read-only optical disc, and an optical disc apparatus and method using the same. The apparatus and method record data on a lead-in area of a high-density read-only optical disc such as a BD-ROM (Blu-ray disc ROM (Read Only Memory)) in the form of pre-... | 01/05/2010 |
| 7630279 | Method of focus error signal adjustment in optical disk device and optical disk drive A method for a focus error signal adjustment in an optical disk device which shapes a focus error signal and enables a high-accuracy focus servo is provided. In a DVD-RAM having an emboss data zone and a rewritable data zone, a focus error signal is generated... | 12/08/2009 |
| 7599257 | Disk drive apparatus and seek method The determination on the reach to a BCA by using a pull-in signal in a seek for the BCA may eliminate the necessity of a position sensor for determination of the reach to a BCA, for example, which can realize a seek independent of a count of the number of steps by a... | 10/06/2009 |
| 7580328 | Method, medium, and device changing a play mode A method, medium, and device changing a play mode if an error occurs in a process of discriminating the type of optical discs. The method includes the operation of discriminating a type of an optical disc loaded in an optical player, and if the optical disc is discr... | 08/25/2009 |
| 7580329 | Optical recording medium recorded with information in depth direction, and method and apparatus of reproduction therefrom An optical disk has a lead-in region provided at the inner circumference side and a user region provided at the outer circumference side. Pit string 3 of pits of different depths is formed in the lead in region. Light beam reflected from the pit string is det... | 08/25/2009 |
| 7573788 | Method for correcting influence of thickness unevenness of recording medium, information recording/reproducing apparatus using the same method and optical head unit An optical disk unit of this invention includes a defocus detecting system for detecting a defocus of an objective lens, a thickness unevenness detecting system for detecting a thickness unevenness of a transparent resin layer provided nearest the objective lens of ... | 08/11/2009 |
| 7483346 | Digital disk read/write device A device for reading from and/or writing on a rotating disk including a mobile opto-electromechanical device placed above the disk and connected to a motherboard via a set of electric wires. The opto-electromechanical device includes actuators, a laser diode, photod... | 01/27/2009 |
| 7468935 | Optimized tracking method The invention relates to a method for optimized tracking of an optical scanner along a track of an optical recording medium, the track having information markings arranged in dense succession, and also having fundamental changes in properties in significantly lower ... | 12/23/2008 |
| 7447124 | Recording/reproducing device The present invention relates to a recording and/or reproduction apparatus and a program suitable for use to record or reproduce data onto or from an optical disk having two recording layers on one side thereof. In an optical disk which has, on one side there... | 11/04/2008 |
| 7443772 | Focus offset calibration A series of signals is applied to a lens actuator of a disc media marking device to respectively position a lens at a series of distances from an optical disc. A mark is formed on the optical disc at each of the distances of the lens from the optical disc by passing... | 10/28/2008 |
| 7420889 | Optical disc tracking control device, tracking control method, and tracking control program A tracking control apparatus for stable tracking lead-in of an optical disc which has wobble grooves as tracks, including: a signal detection unit that detects tracking error and wobble signals from an optical spot; a speed detection unit that calculates a relative ... | 09/02/2008 |
| 7420896 | Information recording apparatus An information recording apparatus according to one aspect of this invention comprises a detection unit configured to detect a manufacturing error unique to an information storage medium, a transmission unit configured to transmit the manufacturing error detected by... | 09/02/2008 |
| 7411891 | Method of transferring data with respect to optical information storage medium having different track pitches An optical information storage medium includes a lead-in area, a lead-out area, and a user data area between the lead-in and lead-out areas and in which user data is recorded. Pits are formed in the lead-in area, the user data area, and the lead-out area, and a trac... | 08/12/2008 |
| 7406024 | Method of recording data to an information recording medium A method of recording data optically to an optical disk having a plurality of sectors, in which each sector has a region to be recorded with data, the data is recorded in units of blocks, and the block includes a predetermined number of sectors and is a data unit in... | 07/29/2008 |
| 7400559 | Information recording medium having a wobbling groove structure An information recording medium having at least a read only area and a recording and reproducing area is composed of at least: a substrate; a recording layer formed on the substrate so as to record and reproduce information; and a light transmission layer having tra... | 07/15/2008 |
| 7397748 | Optical recording medium, recording method and apparatus for optical recording medium and reproducing method and apparatus An optical recording medium having a track including plural pits formed based on first data and lands defined between neighboring pits, these pits are deformed as they are recorded based on second data. The first and second data are synthesized and reproduced to rea... | 07/08/2008 |
| 7394750 | Information recording medium, and information reproducing apparatus and method A record mark is formed on a master disc DS. The record mark is formed substantially along a spiral standard locus, but a record mark position is displaced in a direction crossing the spiral standard locus according to record data. A wobble is formed such that the a... | 07/01/2008 |
| 7391681 | Information recording medium having a wobbling groove structure An information recording medium having at least a read only area and a recording and reproducing area is composed of at least: a substrate; a recording layer formed on the substrate so as to record and reproduce information; and a light transmission layer having tra... | 06/24/2008 |
