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| Number | Title | Issue Date |
| 8164995 | Enhanced linearity DVD writing current circuit A writing current circuit (42) supplies a controlled electrical current to a laser diode (34) for recording data swiftly onto a DVD (16). A plurality of current sources (62) in the writing current circuit (42) supply electrical cur... | 04/24/2012 |
| 8164996 | Power adjustment method, information write method and information write medium An evaluation method and print wire method which includes (a) fitting a modulation characteristic formula M,m=Msat (1−(Pws−Pasy)/(Pw,m−Pasy)) having a saturated modulation Msat, write start power Pws, and asymptotic power Pasy as parameters to a relation betwe... | 04/24/2012 |
| 8159912 | Recording parameter setting device, program thereof, computer-readable recording medium containing the program, information recording medium, recording/reproducing device, and recording parameter setting method A recording parameter setting device including a trial recording parameter setting section and a reproduced signal quality judging section. The reproduced signal quality judging section judges whether or not a reproduced signal obtained by reproduction of the trial ... | 04/17/2012 |
| 8121003 | Optical recording/reproducing apparatus The present invention provides an optical recording/reproducing apparatus which can record information on the whole plane of the optical disk with a stable quality, even when the temperature has largely changed during a recording standby period in an intermittent re... | 02/21/2012 |
| 8072856 | Recording/reproducing device and method using pulse sequences, and information recording medium A recording/reproducing device includes a laser and a laser drive carried by a pickup having a drive for movement and an input for recording information. A control controls the drives to retrieve recording parameters from a predetermined portion of the recording med... | 12/06/2011 |
| 8050159 | Method of recording data on optical disc and optical disc apparatus This document relates to a method of recording data on an optical disc and an optical disc apparatus. The method of recording data on an optical disc may comprise determining a recording speed at which a recording power control operation will be performed based on a... | 11/01/2011 |
| 8050158 | Power adjustment method, information write method and information write medium A write power adjustment method makes it possible to set optimum write power with high precision. Trial writing is conducted by using write power Pw,m (where m is an integer) of a plurality of kinds, and a modulation M,m associated with each write power is calculate... | 11/01/2011 |
| 7889609 | Enhanced linearity DVD writing current circuit A writing current circuit (42) supplies a controlled electrical current to a laser diode (34) for recording data swiftly onto a DVD (16). A plurality of current sources (62) in the writing current circuit (42) supply electrical cur... | 02/15/2011 |
| 7848195 | Method for transmitting a write strategy to a laser driver The invention relates to a method for transmitting a write strategy to a laser driver, and to a pickup and an apparatus for writing to or reading from and writing to optical recording media using such method. According to the invention, the method has the ste... | 12/07/2010 |
| 7843783 | Method for automatically calibrating output power of optical pick-up head and optical disc driver using the method A method for automatically calibrating an output power of an optical pick-up head is provided. First, an optical disc is provided, wherein a relationship between the output power for writing the optical disc and a specific parameter corresponding thereto is defined ... | 11/30/2010 |
| 7742371 | Information recording/reproducing device, information recording/reproducing method, and information recording/reproducing program It is possible to obtain preferable recording characteristic and reproduction characteristic by considering irregularities of unique characteristics of an LD or the like mounted on an information recording and reproduction apparatus as well as characteristics of an ... | 06/22/2010 |
| 7719934 | Recording medium, method of configuring control information thereof, recording and/or reproducing method using the same, and apparatus thereof A method of recording control information in a recording medium, such as an optical disc, including at least one recording layer is provided Velocity information and per recording velocity write strategy (write strategy parameters) is included in control information... | 05/18/2010 |
| 7719935 | Information storage medium having multiple information storage layers with optimal power control area, and recording apparatus to record data with respect to the information storage medium An information storage medium is provided with 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 informati... | 05/18/2010 |
| 7706226 | Determination of optimum writing strategy for recording information onto optical information recording medium The invention is to provide a method for determining an optimum writing strategy for an optical information recording system to record information onto an optical information recording medium. According to a preferred embodiment of the method of the invention, a det... | 04/27/2010 |
| 7693014 | Laser beam recorder and method for controlling a laser beam recorder The present invention relates to a method for controlling a LBR (Laser Beam Recorder) (56) suitable for mastering a record carrier (60) by writing data in the record carrier in circular or spiral tracks and comprising: means (58) for rotating a ... | 04/06/2010 |
| 7684297 | Optical record carrier recording method, optical record carrier and apparatus for writing information A method, an optical record carrier and an apparatus for writing information to an optical record carrier include reading a write strategy from the optical record carrier which has at least two write strategies, and forming pits and lands by controlling a radiation ... | 03/23/2010 |
| 7636282 | Information recording apparatus and method, and information recording medium An information recording apparatus for recording information onto an information recording medium having a plurality of recording layers, by irradiating the information recording medium with laser light for recording, the information recording apparatus including: a... | 12/22/2009 |
| 7633844 | Optical information recording apparatus, optical information recording method, and signal processing circuit An optical information recording apparatus corrects a recording condition for an optical medium having a difference in recording property between the inner and outer peripheries in real time. The optical information recording apparatus obtains an RF signal by using ... | 12/15/2009 |
| 7583573 | Information storage medium having multiple storage layers with optimal power control (OPC) areas and buffer areas An information storage medium and an apparatus for recording and/or reproducing the information storage medium are provided to control optimal recording power without an influence of an optimal power control (OPC) area in a layer upon an OPC area in a different laye... | 09/01/2009 |
| 7583572 | Apparatus and method for calibrating laser power in an optical disk apparatus Laser light irradiation can be performed on a recordable surface in a defocused state with a high-power laser beam with safety without incurring data destruction due to erroneous data recording or overwrite recording even in the recording on an eccentric disk or reg... | 09/01/2009 |
| 7558171 | Optical disc recording/playback apparatus An optical disc recording/playback apparatus is provided with a first AD converter 35 for shaping a push-pull signal 14 detected from an optical disc medium 1 by a light difference signal shaping circuit 21, and converting the signal into... | 07/07/2009 |
| 7522498 | Optical information recording apparatus The present invention is applicable to a recording apparatus of a CD or DVD, a recording method thereof and a recording medium, and an object of the present invention is to clearly record a second information such as characters and figures between two recording leve... | 04/21/2009 |
| 7496012 | Information storage medium having storage layer with optical power control area, and recording apparatus to record data with respect to information storage medium 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... | 02/24/2009 |
| 7496013 | Information storage medium 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... | 02/24/2009 |
| 7492681 | Information storage medium 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... | 02/17/2009 |
| 7492680 | Method of recording data on information storage medium having multiple storage layers with optimal power control (OPC) areas and buffer areas An information storage medium and an apparatus for recording and/or reproducing the information storage medium capable of controlling optimal recording power without an influence of an optimal power control (OPC) area in a layer upon an OPC area in a different layer... | 02/17/2009 |
| 7489606 | Information storage medium having multiple storage layers with optimal power control (OPC) areas and buffer areas An information storage medium and an apparatus for recording and/or reproducing the information storage medium capable of controlling optimal recording power without an influence of an optimal power control (OPC) area in a layer upon an OPC area in a different layer... | 02/10/2009 |
| 7453776 | Optical disc recording/reproducing apparatus and a method for determining write strategy thereof An optical recording and reproducing apparatus and a method for determining a write strategy thereof, includes a pickup part to record record data by irradiating a light on an optical disc, a driving part to operate the pickup part to irradiate the light correspondi... | 11/18/2008 |
| 7450481 | Apparatus for reproducing data from information storage medium having multiple storage layers with optimal power control (OPC) areas and buffer areas An information storage medium and an apparatus for recording and/or reproducing the information storage medium capable of controlling optimal recording power without an influence of an optimal power control (OPC) area in a layer upon an OPC area in a different layer... | 11/11/2008 |
| 7447129 | 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... | 11/04/2008 |
| 7440679 | Recording medium for storing information for still picture, recording and/or reproducing method and apparatus therefor A recording medium for storing information for still pictures, and a recording and/or reproducing method and apparatus therefor. A writeable and rewriteable recording medium stores data for a plurality of still pictures and audio data added thereto in one file or a ... | 10/21/2008 |
| 7440368 | Information storage medium 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... | 10/21/2008 |
| 7426162 | 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... | 09/16/2008 |
| 7423944 | Information storage medium having storage layer with optical power control area, and recording apparatus to record data with respect to information storage medium 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... | 09/09/2008 |
| 7420906 | Automatic power calibration apparatus for optical recording device and automatic power calibration method therefor An automatic power calibration apparatus for optical recording devices and a method therefore. The power calibration apparatus includes an optical emission unit, an optical emission unit driving unit which outputs a signal for driving the optical emission unit in re... | 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 |
| 7414935 | Method of overwriting optical disk with adapting initial writing conditions An optical recording method is designed for recording data on a recordable optical disk by use of a laser beam of a present recording apparatus under a desired recording condition. The method detects identification information which is reserved in the optical disk a... | 08/19/2008 |
| 7414937 | Information storage medium having multiple storage layers with optical power control areas, and recording apparatus to record data with respect to information storage medium 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... | 08/19/2008 |
| 7414934 | Method for controlling optical power level A method for controlling an optical power level includes the steps of a) regularly increasing a control value of a driving signal generator for driving a pickup unit adapted to output an optical power, b) checking a driving signal of the driving signal generator acc... | 08/19/2008 |
| 7411886 | Device and method of recording information on an optical disc A device for recording information on an optical disc so as to improve the recording quality of the information when a recording operation has just started. The recording device includes a luminous element radiating a light for recording information on the optical d... | 08/12/2008 |
