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| Number | Title | Issue Date |
| RE43237 | System for constant angular velocity disk recording and method for laser power control thereof The system and method is used for CAV (Constant Angular Velocity) control format recording, whereas the existing disk data is recorded under CLV (Constant Linear Velocity) control format recording. When the PUH receives a laser driver signal, it generates a feed sig... | 03/13/2012 |
| 7952969 | Read and write power control methods and system for optical recording device The present invention discloses read and write power control methods and system for an optical recording device that records information on an optical disk having read-only areas. The read and write power control methods respectively introduce the steps of determini... | 05/31/2011 |
| 7903512 | Multi-speed recording for multi-layer disc The present invention relates to a recording apparatus, record carrier and method of recording data on at least two layers of a recording medium by using a radiation power, wherein individual recording speeds are determined for respective ones of the at least two la... | 03/08/2011 |
| 7872955 | Recording medium, method of configuring control information thereof, recording and/or reproducing method using the same, and apparatus thereof The present invention provides a method of recording control information in a recordable optical disc including at least one recording layer. In recording control information within a management area of an optical disc including at least one or more recording layers... | 01/18/2011 |
| 7817514 | Recording medium, method of configuring control information thereof, recording and/or reproducing method using the same, and apparatus thereof The present invention provides a method of recording control information in a recordable optical disc including at least one recording layer. In recording control information within a management area of an optical disc including at least one or more recording layers... | 10/19/2010 |
| 7639576 | Optical disk device and optical disk recording method An optical disk device includes a recording power acquiring unit which acquires recording power, a recording unit which records data on an optical disk set in a device body by irradiating laser light of the recording power onto the optical disk, and a laser power co... | 12/29/2009 |
| 7636283 | Optical disc signal recording method and optical disc apparatus An optical disc signal recording for forming a record mark according to a recording signal on an optical disc by applying a laser beam of a predetermined power level to the optical disc is provided. A recording pulse having a first period having a first level of Po ... | 12/22/2009 |
| 7558172 | Optical disk device recording data on a recordable or rewritable optical disk by setting a recording velocity and a recording power for each of zones on an optical disk An optical disk device records data on a recordable or rewritable optical disk. The optical disk device comprises zone storing means for preliminarily storing locations of a plurality of zones set by dividing a recordable or rewritable area of the optical disk from ... | 07/07/2009 |
| 7522499 | Recording method and apparatus for optical recording medium with a laminated structure having ROM and RAM layers The recording method for an optical recording medium with a laminated structure with a ROM layer, from which data having been recorded beforehand can be read out, and a RAM layer, from which data is read out and in which data is recordable, includes: emitting laser ... | 04/21/2009 |
| 7502293 | Information recording apparatus for controlling recording power of a recording medium having a constant linear density, an information recording method, an information recording program, a recording medium that can be read and written to by a computer, and circuit parts An information recording apparatus that records information with a substantially constant linear density in a circumferential direction of a recording medium having a disk shape, includes variable velocity recording control means, recording power modification means,... | 03/10/2009 |
| 7433282 | Recording method and drive for optical storage media A recording method and drive for optical storage media. The method inserts or replaces a special pattern in a recording EFM signal before the recording process is interrupted. Therefore, the special pattern is recorded either before or on the interrupted position. T... | 10/07/2008 |
| 7411880 | Method of recording erase pattern information on an optical recording medium, erasing information on the optical recording medium based on the erase pattern information, and optical recording medium therefor An optical recording medium allowing data to be recorded on, erased from, and reproduced from, and storing information about power levels of an erase pulse. The recorded erase pattern information may include information about power levels of first and last pulses of... | 08/12/2008 |
| 7372796 | Apparatus for controlling monitor photo diode in optical pickup system An apparatus for controlling a monitor photo diode (PD) of an optical pickup system monitors an optical power signal output for writing data on or reading data from a disk. The apparatus includes a comparator which compares a voltage signal corresponding to the opti... | 05/13/2008 |
| 7369470 | Method of recording erase pattern information on an optical recording medium, erasing information on the optical recording medium based on the erase pattern information, and optical recording medium therefor An optical recording medium allowing data to be recorded on, erased from, and reproduced from, and storing information about power levels of an erase pulse. The recorded erase pattern information may include information about power levels of first and last pulses of... | 05/06/2008 |
| 7366073 | Information recording apparatus and method, and computer program product An information recording apparatus is provided with: a recording device for recording information into recording areas of an information recording medium by irradiating laser light; a reference-output-value holding device for holding a reference-output-value of the ... | 04/29/2008 |
| 7362690 | Laser driver/method for generating a laser drive signal A driver for driving a light generator for generating light, comprising a digitalto-analog converter (DAC) having a data input, a data output for generating an analog signal, a first multiplexer (MUX1) for cyclic selection of a number of data levels correspon... | 04/22/2008 |
| 7360145 | Information storage medium on which drive data is recorded, and method of recording information on the information storage medium An information storage medium includes a drive zone having a plurality of physical clusters or ECC blocks. When new drive data is recorded in the drive zone, the new drive data is recorded in a physical cluster or ECC block next to the physical cluster or ECC block ... | 04/15/2008 |
| 7355941 | Information recording method and optical disk apparatus for recording information on a recording-type optical disk An information recording method includes the steps of carrying out an experimental write on both inner-peripheral and outer-peripheral experimental writing areas, in the case of the outer-peripheral experimental writing, a constant recording power computed on the ba... | 04/08/2008 |
| 7355946 | Method of recording signals onto a recording medium A method of recording data onto an optical disk uses a write strategy that corresponds to the recording features of the optical disk. The method detects a track pitch or storage capacity of a recording medium, adjusts a write strategy according to the detected track... | 04/08/2008 |
| 7349306 | Method of recording erase pattern information on an optical recording medium, erasing information on the optical recording medium based on the erase pattern information, and optical recording medium therefor An optical recording medium allowing data to be recorded on, erased from, and reproduced from, and storing information about power levels of an erase pulse. The recorded erase pattern information may include information about power levels of first and last pulses of... | 03/25/2008 |
| 7345972 | Rotation control method and storage apparatus A storage apparatus rotates an optical recording medium at two or more kinds of rotational speeds. The rotational speed is decreased when a read or write margin becomes less than or equal to a first predetermined value or, when a frequency of generation of a servo a... | 03/18/2008 |
| 7342681 | High-speed calibration method and system for an image-capture apparatus The present invention provides a calibration method and circuit for outputting an average calibration value used in an image-capture apparatus. The calibration circuit comprises difference means accepting a plurality of digital signals from capturing a pixel of a ca... | 03/11/2008 |
| 7342853 | Optical disc system and method for managing shock during data record/play An optical disc system and a method of managing shock while recording or playing data in the optical disc system are provided. The optical disc system includes an optical pick-up unit for applying a laser beam to a track of an optical disc and detecting reflected li... | 03/11/2008 |
| 7336574 | Apparatus for detecting abnormal states of laser diode power in an optical disc recording/reproducing device An apparatus for detecting abnormal states which prevents damage to a laser diode or data recorded on a disc and swiftly correcting the abnormal state. An overflow/underflow detector detects whether overflow or underflow of the laser diode occurs, by comparing a las... | 02/26/2008 |
| 7327649 | Method for formatting optical information recording medium, at recording power less than recording power to be used for recording, and recording medium formatted by the method A method for formatting a phase-change optical disk, using an apparatus for formatting phase-change optical disk, which apparatus includes (a) a drive control substrate on which a CPU for controlling an optical disk drive, a ROM for storing data, and an interface ar... | 02/05/2008 |
| 7319644 | Optical head, light-emitting/receiving device, and apparatus for recording/reproducing optical recording/recorded medium An optical head in which focusing error is detected by a spot size method used for recording and/or reproducing information signals on or from an optical disc. The optical head includes a unit for correcting the spot shape between the objective lens and a photodetec... | 01/15/2008 |
| 7317674 | Optical pick-up units and laser drivers with increased functionality Optical pick-up units and laser drivers are disclosed, which can be used in various types of information recording/reproducing apparatuses, such as, but not limited to, DVD and CD drives, DVD camcorders, and DVD video recorders. A laser driver integrated circuit (LD... | 01/08/2008 |
| 7313075 | Optical information recording method and apparatus An optical information recording method and apparatus which records information on a recording medium by irradiating the recording medium with an irradiation light of a recording power to form a recorded-mark on the recording medium such that reflection coefficient ... | 12/25/2007 |
| 7307939 | Method and apparatus for controlling write power in an optical drive A method and an apparatus which controls write power of an optical driver by optimizing the number of channels used to drive a laser diode in a write mode while stabilizing the level of a write power voltage at an early stage of the write mode. The method of control... | 12/11/2007 |
| 7304929 | Optical information recording medium, an optical information recording apparatus, an information processing apparatus, program and information recording method An optical information recording apparatus can maintain a stable recording quality when recording information on an optical information recording medium having a recording layer of a multilayer structure. An optical information recording medium of a rotating type ha... | 12/04/2007 |
| 7304936 | Method and apparatus for controlling power of laser diode in optical disc drive A method of and an apparatus for controlling a power of a light emitter in an optical disc drive to stabilize a servo control operation by efficiently compensating a slow tail effect occurring in a photodiode monitoring outputs of the light emitter are provided. The... | 12/04/2007 |
| 7301870 | Information recording method and an information recording apparatus An information recording method where different optimum recording power levels are determined for different mark lengths. At a first trial writing process, first predetermined test data, from which a specific pattern, e.g., 3T is removed, are written with rec... | 11/27/2007 |
| 7283454 | Information storage medium and method of recording information thereon An information storage medium (a disc) includes an area and a user data area. The area includes a recordable zone having a drive & disc zone in which information on a drive and information on a state of the disc are recorded. The drive & disc zone includes a plurali... | 10/16/2007 |
| 7283445 | Optical storage device and reading method for optical storage medium A signal detection sections detect the light intensity modulated by the phase pits as ROM signals from the return lights of an optical storage medium that has phase pits and a recording layer to simultaneously regenerate data in the ROM and RAM, and detect the RAM s... | 10/16/2007 |
| 7281175 | Readout controlling apparatus, reproducing apparatus, recording apparatus, and readout controlling method A readout controlling apparatus for controlling reading conditions at the time of reading data coded in units of predetermined code blocks from a recording medium capable of performing error correction at a high reliability even when the playback conditions are poor... | 10/09/2007 |
| 7280446 | Optical disk drive responsive to internal temperature change There is provided an optical disk drive capable of appropriately effecting recording and reproducing operations without being affected by offset values and a laser output value, which are set at startup of the disk drive, even when changes have arisen in the interna... | 10/09/2007 |
| 7272094 | Methods and devices for recording marks in an information layer of an optical record carrier, and record carriers for use therein Methods and devices are described for writing an optical record carrier, in which a mark representing recorded data is written in a phase-change layer of a record carrier by a sequence of radiation pulses. A rear heating pulse 24 is introduced after a last wr... | 09/18/2007 |
| 7266063 | Optical power calibration method according to a data writing location onto an optical storage carrier A method is used for calibrating a writing power of an optical storage carrier player. The player has an access device for writing data onto the optical storage carrier. The carrier includes a center, an inner power calibration area (first calibration area), a data ... | 09/04/2007 |
| 7254101 | Laser beam power modulation pattern decision method, device for recording data onto optical recording medium, and optical recording medium It is an object of the present invention to provide a method for determining a pattern for modulating the power of a laser beam which can determine a pattern for modulating the power of a laser beam so that data can be recorded in a write-once type optical recording... | 08/07/2007 |
| 7248551 | Apparatus and method for controlling laser power for disc drive A laser power control apparatus and method prevent fluctuation in the level of laser power due to a difference between reaction speeds of an automatic power controller according to write speeds of a disc drive. In the apparatus and method, laser power can be automat... | 07/24/2007 |
