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| Number | Title | Issue Date |
| 7428198 | Optical disc device Provided is an optical disc device in which adjustment precision of recording laser power is improved without complication of a processing sequence during recording operation. In response to a recording start instruction, OPC is executed using an inner disc drive zo... | 09/23/2008 |
| 7423945 | Optical disc, method and apparatus for recording signal thereon An optical disc includes a data area, a first test recording area, a second test recording area, and a recording information management area. The first test recording area extends inward of the data area, and has a portion which has undergone test recording. The sec... | 09/09/2008 |
| 7420901 | Information recording method, recording optical disc, and information recording/recording/reproducing apparatus The present invention discloses an optical information recording method of an optical information recording and reproduction device that uses a semiconductor laser to record or reproduce data in an optical disk. Based on a detected value of an optical path differenc... | 09/02/2008 |
| 7414936 | Recordable optical disc, optical disc recording apparatus, optical disc reproduction apparatus, and method for recording data onto recordable optical disc A DVD-R recorder according to the invention detects an item of recording speed information (d15) from a DVD-R (30) on which histories of recording speed information, write strategy, and recording power condition are stored. When the decoded item of rec... | 08/19/2008 |
| 7411885 | Method of determining the time of adjusting writing strategy of an optical drive A method of determining the time of adjusting writing strategy of an optical drive. Firstly, relation between an output signal value and an ambient temperature is recorded in a look up table stored in a memory. Then, the output signal value of a compensator can be o... | 08/12/2008 |
| 7411881 | Information recording apparatus, method and system, with increased likelihood for recording information at appropriate recording conditions An information recording apparatus records information on an information recording medium by focusing a light beam emitted from a light source on the information recording medium. The apparatus has an information reading device of a type of the information recording... | 08/12/2008 |
| 7403457 | Method and apparatus for recording information with a multi-layer structure An optical recording medium has a multi-layer structure recording layer portion including plural recording layers provided with tracks for guiding a recording light and being adapted to record data, where recording condition information and recording layer identific... | 07/22/2008 |
| 7400571 | Information recording medium, recording apparatus, reproduction apparatus, recording method, and reproduction method An information recording medium is provided, which comprises a plurality of recording layers and a first disc information area for storing parameters relating to access to the plurality of recording layers and formats relating to the plurality of recording layers. T... | 07/15/2008 |
| 7397740 | Method and recording device capable of selecting a write strategy applied to an optical disc A method and a recording device capable of selecting a preferred write strategy from a plurality of write strategies for an optical disc. The optical disc contains a characteristic value. The method includes: reading the characteristic value from the optical disc; s... | 07/08/2008 |
| 7391687 | Method of determining recording power for recordable optical disk in optical disk system A method of determining a recording power for a recordable optical disk in an optical disk system is provided. The method is capable of minimizing the time taken to determine an optimum recording power for each recording speed and thus improve recording performance.... | 06/24/2008 |
| 7388821 | Information recording device An information recording device comprising at least a recording pulse generating means and a recording pulse selecting means capable of generating various multi-pulses each of which is a combination of a leading heating pulse and a succeeding heating pulse, and rect... | 06/17/2008 |
| 7388819 | Optical disc apparatus and recording power determining method thereof A method of determining a recording power used to record information to an optical disc, includes carrying out test recording which records predetermined data to a predetermined area of the optical disc to determine the recording power, and recording predetermined d... | 06/17/2008 |
| 7385893 | Method for forming marks on write-once medium than applying second beam with power level lower than read power set for a predetermined time A write-once high density optical recording medium capable of a high speed recording that effectively forms space between recording marks. A recording layer 18 of a high speed write-once optical recording medium 10 is formed by laminating a first sub r... | 06/10/2008 |
| 7379407 | Method and system for optical drive write strategies embedded in an optical medium An optical drive writes information to an optical medium by obtaining a write strategy for the optical medium from a write strategy table embedded in the optical medium. A write module in the optical drive reads an optical drive identification code from the optical ... | 05/27/2008 |
| 7376059 | Method of obtaining optimal recording condition with respect to information storage medium having storage layer with optical power control area An information storage medium having a plurality of information storage layers, each of which includes an optimal power control (OPC) area for obtaining an optimal recording condition. Optimal power control areas in odd-numbered and even-numbered information storage... | 05/20/2008 |
| 7376058 | Optical information recording medium containing a plurality of recording layers provided with characteristics to achieve optimum recording conditions An optical information recording medium according to the present invention includes a first information recording layer on which information is to be recorded by laser light; and a second information recording layer on which information is to be recorded by the lase... | 05/20/2008 |
| 7369469 | Laser power control apparatus and method, an optical disk apparatus and a recording method A laser power control apparatus is for use in an optical disk apparatus for recording information on an optical disk having at least a first layer and a second layer. The laser power control apparatus includes a power control section for controlling a laser element ... | 05/06/2008 |
| 7366065 | Optical disk apparatus and an optical disk recording and reproducing method An optical disk apparatus and an optical disk recording and reproducing method are provided in which an actuator can be controlled in stable fashion at the time of high-speed recording operation. Before performing the high-speed recording operation under servo contr... | 04/29/2008 |
| 7366071 | Data recording method and device, data recording medium, data reproduction method and device The present invention provides a DSV normal controller and a DSV special controller. In only a predetermined region designated on an optical disc, the DSV special control is performed. The DSV special control causes the absolute value of the DSV to increase so that ... | 04/29/2008 |
| 7362672 | Method and apparatus for disc rotation control in an optical storage system based on detected extent of disc warping An apparatus is provided for disc rotation control in an optical storage system, which is capable of generating a focusing error signal from light that was reflected by a loaded optical disc. The apparatus includes a focus controller for processing the focusing erro... | 04/22/2008 |
| 7362673 | Optical recording method and apparatus using this method Optical recording method and apparatus using this method. An optical recording method and recording apparatus using this method is described in which an optimum write power of a radiation beam in the apparatus is set by writing a series of test patterns on an... | 04/22/2008 |
| 7359309 | Optical disk, thin plastic sheet, and method for affixing display sheet to disk substrate An optical disk is provided with a disk substrate having a recording layer formed on one surface of a substrate and a cover sheet applied over the recording layer; and a display sheet which is affixed to a surface of the disk substrate opposite to a surface covered ... | 04/15/2008 |
| 7359300 | Recording condition determining method, program, and medium, information recording apparatus, and information recording system A recording condition determining method is disclosed for realizing high quality recording at high speed while preventing the degradation of a light source. Specifically, a determination is made as to whether an optimal recording power obtained through OPC or runnin... | 04/15/2008 |
| 7359298 | Optical pickup device for writing information to an optical disk The present invention relates, in general, to an optical pickup and apparatus for recording and reproducing information on and from an optical recording medium, such as a compact disk or a digital versatile disk and, more particularly, to an optical pickup device, w... | 04/15/2008 |
| 7358470 | Optical pickup An optical pickup with a reflective coating device is provided, including a laser diode (LD), an optical element, and a photo detector integrated circuit (PDIC). The LD emits 1-3 lights with different wavelengths but the same polarization orientation. The beam trans... | 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 |
| 7355943 | Method of recording and/or reproducing data with respect to multi-layer information storage medium having optimal power control areas An information storage medium having a plurality of information storage layers, each of which includes an optimal power control (OPC) area for obtaining an optimal recording condition, wherein OPC areas in odd-numbered and even-numbered information storage layers ar... | 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 |
| 7355939 | System and method for switching control modes of spindle motor A system and method of switching the control modes of spindle motor are described. The switch system comprises a first control module, a second control module and a switch controller. The first control module electrically coupled to the spindle motor and the OPU con... | 04/08/2008 |
| 7355957 | Optical disc medium having a system information recording area of low recording density In order to stably carry out reproduction of information in an optical disc medium (10) using a PRML (partial-response maximum-likelihood) method for reproducing the signal, the optical disc medium (10) has not only a data recording area (14) wh... | 04/08/2008 |
| 7352668 | Optical disc apparatus manufacturing method and optical disc apparatus A method for manufacturing an optical disc apparatus including: reading by an optical pickup head a medium on which signals are recorded with appropriate optical power; leading an RF signal corresponding to the recorded signal obtained from the medium by the reading... | 04/01/2008 |
| 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 |
| 7349307 | Method of recording data optimally onto a recording medium The present invention relates to a method of maintaining an optimal writing power for various recording modes during data recording onto a recording medium. The present method checks a recording speed at a recording position, reads a write strategy set for the check... | 03/25/2008 |
| 7349308 | Optical disc apparatus and recording power determining method thereof A method of determining a recording power used to record information to an optical disc, includes carrying out test recording which records predetermined data to a predetermined area of the optical disc to determine the recording power, and recording predetermined d... | 03/25/2008 |
| 7345974 | Optical recording/reproducing apparatus An object of the present invention is to provide an optical recording/reproducing apparatus capable of improving medium usability through a laser power adjusting process while keeping compatibility with a read only type medium. The optical recording/reproducing appa... | 03/18/2008 |
| 7345973 | Multi-layer writable optical record carrier with an optimum power calibration area, and method and apparatus for forming optimum power calibration areas on such a record carrier A writable optical record carrier comprising a plurality of recording layers L0, . . . , Ln−1 separated by a spacer material, each recording layer comprising an optimum power calibration area having a first portion with an average reflection value representative o... | 03/18/2008 |
| 7342986 | Digital PLL device A phase-locked-loop device includes a clock generator for generating a reference clock based on a binarized playback signal and a frequency of run-length data and for generating N-phase clocks using the reference clock, a pulse-length measuring device for measuring ... | 03/11/2008 |
| 7342861 | Method and apparatus for recording data on an optical recording medium An optical recording apparatus and method thereof form a mark and a space by radiating a laser signal corresponding to a recording pulse having a peak level and a bias level onto an optical recording medium. The optical recording apparatus includes a recording pulse... | 03/11/2008 |
| 7342860 | Method and apparatus for recording data on optical recording medium A method and apparatus to record data on an optical recording medium include generating a recording waveform having an erase pattern comprising a predetermined pulse having a high level which is higher than an erase power level and having a low level which is lower ... | 03/11/2008 |
| 7339871 | Method for accurate positioning of marks and spaces on an optical disc An optical disc has spatial features (notches, bumps, etc.) that intentionally distort the analog Read Data signal. For a mark or space that is centered on a spatial feature, the distortion does not affect the resulting binary Read Data signal. If an edge of a mark ... | 03/04/2008 |
