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| Application No. | Application Title | Issue Date |
| 20120008486 | RECORDING DEVICE AND APC CORRECTION METHOD A recording device includes a light irradiation portion which irradiates an optical recording medium with laser light emitted from a light source via a field lens, a light emission drive portion which drives and causes the light source to emit light, a front monitor whi... | 01/12/2012 |
| 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 d... | 07/14/2011 |
| 20110085434 | MULTI-LAYER OPTICAL DISC, INFORMATION RECORDING METHOD AND INFORMATION REPRODUCING METHOD According to one embodiment, single-sided dual-layer recordable disc 100 may be used. Information recording is performed by forming mark and space portions on data area DA using modulated laser power. Pp denotes the maximum laser power or peak power for forming t... | 04/14/2011 |
| 20100329103 | METHOD AND APPARATUS FOR MASTERING TRACKS ON A DISC BY UTILIZING AN ELECTRON BEAM, AND RESPECTIVE DATA DISC The method provides a recording of data on a rotating disc by using an electron beam for recording marks along a track on the disc, the electron beam performing a wobble oscillation in a radial direction of the disc with a wobble amplitude for recording at least two tra... | 12/30/2010 |
| 20100172230 | OPTICAL DISC DRIVE APPARATUS AND OPTICAL DISC REPRODUCTION METHOD USING THE SAME An optical disc drive apparatus (100) of the present invention rotates an optical disc (1) at a predetermined rotation speed using a motor (2). An optical pickup (3) irradiates the optical disc (1) with a laser beam (5) emitted ... | 07/08/2010 |
| 20100165823 | OPTICAL PICKUP DEVICE AND INFORMATION PROCESSOR In an optical beam transmissive adjusting mechanism (110) included in an optical pickup device, arrangement positions of a first transmissive element (111) having a first transmittance and a second transmissive element (112) having a second transmit... | 07/01/2010 |
| 20100110866 | OPTICAL DISC REPRODUCING LIGHT QUANTITY SETTING METHOD AND OPTICAL DISC APPARATUS In a method of setting a quantity of light directed onto an optical disc for reproduction purposes, an area of the optical disc in which information has been recorded is reproduced with a test-reproducing light quantity (S14, S24), a reproduction time or n... | 05/06/2010 |
| 20100061213 | OPTICAL HOLOGRAPHIC DEVICE AND METHOD WITH GAIN COMPENSATION The present invention relates to an optical holographic device and a corresponding method for reading out a data page recorded in a holographic recording medium (106). In order to improve the bit error rate a reconstruction means (115) provided for reconst... | 03/11/2010 |
| 20090323493 | MULTILAYER OPTICAL RECORDING MEDIUM, RECORDING DEVICE, AND RECORDING LASER POWER ADJUSTMENT METHOD A multilayer optical recording medium includes three or more recording layers formed in a thickness direction. Trial writing areas provided in the respective recording layers to adjust the power of recording laser are formed not to overlap at a position in a planar dire... | 12/31/2009 |
| 20090310470 | METHOD FOR PRODUCING A DATA CARRIER AND DATA CARRIER PRODUCED THEREFROM A method of producing a data carrier with a marking is disclosed. The data carrier includes a laser-markable portion and a beam-modifying portion adjacent the laser-markable portion. The beam-modifying portion has a beam modifying property. The method includes irradiati... | 12/17/2009 |
| 20090268589 | INFORMATION RECORDING UNIT AND RECORDING CONDITION CALIBRATION METHOD A method for calibrating a recording condition in an information recording unit includes: heating a recorded data pattern recorded on the information recording medium; reproducing the recorded data pattern after the heating, to measure a reproduced-signal quality; and d... | 10/29/2009 |
| 20090268590 | OPTICAL STORAGE MEDIUM, INFORMATION RECORDING APPARATUS, AND INFORMATION REPRODUCING APPARATUS An optical storage medium can be provided by which illegal usage of the optical storage medium involving an infringement on the copyright can be prevented effectively without impairment of the functions for reproducing physical format information and optical storage med... | 10/29/2009 |
| 20090201790 | OPERATING CURRENT MODIFYING DEVICE AND METHOD An operating current modifying device is provided for a power generating element. The power generating element generates an output power when the operating current is larger than a threshold current in the power generating element. A functional relationship is between t... | 08/13/2009 |
| 20090196138 | INFORMATION RECORDING APPARATUS AND CONTROL METHOD THEREOF According to one embodiment, in one embodiment of the invention, a laser drive circuit is provided with a first current source, a second drive current source, and a third current source. The control section selectively obtains a plurality of laser light use mode of cont... | 08/06/2009 |
| 20090185464 | LASER POWER CONTROL METHOD AND OPTICAL INFORMATION RECORDING/REPRODUCING DEVICE Each of control powers of a first definition group that correspond to a pulse train used to form a recording mark, and a plurality of levels of a second definition group that includes each of the control powers of the first definition group in accordance with the condit... | 07/23/2009 |
| 20090175152 | OPTICAL DISK APPARATUS AND OPTICAL PICKUP Provided is an optical disk apparatus that suppresses shortening of the life time of a light source, degradation of the signal quality involved in an increase in quantum noise, and lowering of the slope efficiency, which are caused by a temperature increase of the light... | 07/09/2009 |
| 20090154326 | Optical recording and reading equipment Disclosed herewith is a data recording and reading equipment capable of reducing laser noise easily. At first, a laser beam source that can reduce the laser noise when reading data from a subject optical disk is obtained. A modulator capable of varying laser attenuation... | 06/18/2009 |
| 20090116365 | Optical Recording Medium and Optical Recording Method An optical recording method to record information with a mark length recording method, where an amorphous mark and a crystal space are recorded only in the groove of a substrate having a guide groove, with the temporal length of the mark and the space of nT (T denotes a... | 05/07/2009 |
| 20090052306 | Semiconductor Laser Generator and Method of Controlling the Same, and Optical Disk Device The present invention provides a laser generator that allows recording quality to be improved, a method of controlling the laser generator, and an optical disk device. In a laser emitting device including a semiconductor laser diode emitting laser and a semiconductor la... | 02/26/2009 |
| 20090046565 | METHOD FOR DETERMINING OPTIMUM LASER BEAM POWER AND OTICAL RECORDING MEDIUM To provide a method for determining an optimum laser beam power for a single-side, dual-layer optical recording medium having first and second information layers, the method including: determining an optimum laser beam power based on a predetermined characteristic value... | 02/19/2009 |
| 20090010143 | POWER CONTROL SYSTEM AND METHOD OF OPTICAL DISK DRIVE The present invention provides an over drive power control system and a method which are capable of generating an optimized output power of the optical disk drive under a variation of operational environment. According to this invention, a photo detecting unit detects c... | 01/08/2009 |
| 20080298216 | Method for Destroying Data of an Optical Disk The present invention discloses a method used in an optical disk drive for destroying data of an optical disk. The optical disk is rotated clockwise and the optical head moves one track per revolution. Then, the optical head is controlled so that the spot size of the em... | 12/04/2008 |
| 20080285426 | Information Recording Method And Information Recording Device An information recording method and device for recording information by irradiating an optical information recording medium with an energy beam includes forming a first recording mark by irradiation of a monopulse-shaped energy beam having at least a first power level a... | 11/20/2008 |
| 20080279084 | Image Reader An LPF performs low-pass filtering for a light reception signal responsive to return light received by an optical pickup. A comparator makes a comparison between the level of the signal output from the LPF and a predetermined threshold value and outputs a high or low pu... | 11/13/2008 |
| 20080267045 | Laser driving method and optical disc recording/reproducing device A laser driving method and an optical disc recording/reproducing apparatus are provided which are arranged to stably write data on an optical disc. The laser driving method is applied to a laser driving circuit arranged to have a laser diode for emitting a laser beam on... | 10/30/2008 |
| 20080247299 | RECORDING MEDIUM, RECORDING METHOD, REPRODUCTION METHOD, RECORDING APPARATUS AND REPRODUCTION APPARATUS A recording medium comprising a recording area, the recording area includes a first area and a second area, the first area includes a frame area, the frame area includes an area in which a second synchronization code sequence and at least a portion of data are to be rec... | 10/09/2008 |
| 20080232226 | Information Recording Apparatus and Method, and Computer Program An information recording apparatus has: a recording device for recording information onto an information recording medium, whose recording speed can be changed to first and second linear velocities, by irradiating laser light with a variable recording power; a measuring... | 09/25/2008 |
| 20080225674 | OPTICAL DISC APPARATUS AND METHOD FOR CONTROLLING THE SAME An optical disc apparatus capable of obtaining an effect to reduce the laser noise without shortening the laser diode service life or increasing the power consumption. The optical disc apparatus includes a laser diode for emitting a laser beam, a laser driver for drivin... | 09/18/2008 |
| 20080212454 | Information recording method and apparatus with suppressed mark edge jitters Recording information is disclosed in which an information recording medium is irradiated with a recording energy beam that is power-modulated into at least a record power level and a record-ready power level lower than the record power level. The information is recorde... | 09/04/2008 |
| 20080212453 | OPTICAL INFORMATION RECORDING DEVICE, OPTICAL INFORMATION RECORDING METHOD, AND OPTICAL INFORMATION RECORDING MEDIUM Provided are an optical information recording device, an optical information recording method, and an optical information recording medium which provide an appropriate recording characteristic even when a disturbance occurs during information recording. A drive forms re... | 09/04/2008 |
| 20080192617 | Information recording method and apparatus with suppressed mark edge jitters Recording information is disclosed in which an information recording medium is irradiated with a recording energy beam that is power-modulated into at least a record power level and a record-ready power level lower than the record power level. The information is recorde... | 08/14/2008 |
| 20080151738 | Optical Disk Drawing Apparatus, Host Computer, and Optical Disk Drawing Method A drawing pulse generating unit of an optical disk recording apparatus judges a bit stream of main data contained in a bit stream signal of frame-formatted data, and generates pulse signals DOTX 1 and DOTX 2 based upon the judgment, and then, outputs the g... | 06/26/2008 |
| 20080137520 | Recording and Reproducing Method and Recording and Reproducing Apparatus A recording and reproducing method has a recording pulse generating step of generating a recording pulse to set timing of a beam emitted from a laser according to data to be recorded on an information recording medium; a laser power control step of controlling a laser d... | 06/12/2008 |
| 20080130472 | RECORDER AND METHOD FOR DETERMINING RECORDING SIGNAL A method for determining a recording signal of a recorder to record data onto a disc, the recording signal comprising a top pulse having a first power value Ph includes steps of: generating first test power values based on an initial first power value to record test dat... | 06/05/2008 |
| 20080123508 | Write Correction Circuit and Write Correction Signal Generating Method Conventional signal write correction circuits involve a problem that when n-phase clock is selected, the waveform may be distorted in high speed operation if the last-phase clock is selected. Two delay selection circuits (16a, 16b) select the... | 05/29/2008 |
| 20080101204 | OPTICAL DISK DEVICE AND METHOD FOR CONTROLLING THE SAME. An optical disk device capable of conducting high-precision record control in response to minute defects on an optical disk, and a method for controlling the optical disk device are provided. Recording power for recording data on an optical... | 05/01/2008 |
| 20080084805 | WRITING POWER CALIBRATING METHOD AND DATA RECORDING APPARATUS USING THE SAME A power calibrating method includes steps of: determining a target value for a front monitor diode signal; outputting light with a power having a writing power level and an erasing power level, durations of the writing power level being identical to durations of the era... | 04/10/2008 |
| 20080056103 | PHOTODETECTOR AND OPTICAL PICKUP APPARATUS A photodetector comprising: a first light-receiving surface configured to receive reflected light of zero-order light generated based on a laser beam, from one information recording layer of a multilayer optical disc; a second light-receiving surface that is adjacent to... | 03/06/2008 |
| 20070291620 | POWER CONTROL SYSTEM AND RELATED METHOD A method for controlling a specific output power level emitted from a laser diode (LD) in an optical pick-up head unit (OPU) is disclosed. The LD is configured to provide a plurality of output power levels for accessing/recording an optical disc. The method includes: de... | 12/20/2007 |
| 20070291621 | Method of setting write conditions for optical recording media A method is provided to enable efficient optimization of write pulse waveforms using a trial writing region. To record information on an optical recording medium using a laser beam, the method includes: recording a specific pattern of multiple record marks on the trial ... | 12/20/2007 |
