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RE39952 Laser power controller and optical disk device  
A power control device for controlling a power of a light source of an optical beam directed to an optical medium. The power control device includes a reflected light detector for detecting...
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...
7307932 Recording medium, recording apparatus, and reading apparatus  
In a recording material, physical characteristic information of the recording medium, and more specifically, material information representing the material of the disc, is recorded. Accordingly, a...
7304931 Recording medium, optical disk apparatus and writing method  
Recording parameters are decided so that the time control information on at least the front edge and the rear edge of a parameter forming a mark of twice size or above of the laser spot diameter...
7304928 Laser power control technique and apparatus for recording and reproducing data in and from optical disk under laser power control  
A laser power control apparatus for controlling the output power of a semiconductor laser used to record and reproduce data in and from a recording medium is provided. The laser power control...
7301883 Advanced high density data write strategy  
A method of writing a mark to an optical disc includes receiving data to be written and generating a control signal for a laser pulse having a melt period that transitions to a growth period...
7298681 High-frequency superimposing method and optical disk apparatus using it  
An optical disk drive includes drive current generation unit for supplying a mark forming semiconductor laser drive current and a space forming semiconductor laser drive current; first...
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...
7272088 Information recording apparatus and optimum recording laser power detecting method  
An information recording apparatus records the record data onto an information recording medium, which is provided with wobbled tracks and on which pre-format address information is recorded. The...
7263043 Optical disk apparatus for optimizing laser power during recording  
An optical disk drive for optimizing laser power to be used at the time of recording operation. In a DVD-R drive and a DVD-RW drive, a controller performs OPC to set recording power and records RMD...
7254102 Method for optically recording information according to a strategy and computer-readable recording medium for causing a computer to optically record information according to a strategy  
In a method for optically recording information in a system including a recording and reading device that includes a strategy part for conducting a strategy when optically recording information and...
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...
7242652 Optical recording system with optimal recording laser beam power control, and method and device for generating a mark formation effectiveness signal in an optical recording system  
An optical recording system includes a laser light source that provides an incident recording light signal for recording information on an optical recording medium, an optical detector for...
7239586 Optical disk device and recording power determining method  
An optical disk drive and recording power determination method determine the optimum power with consideration for the recording state of a base layer track when determining the optimum power by...
7236436 Controller for data recorder  
A controller for controlling interruptions and restarts when writing data to a recording medium by emitting a laser beam against the recording medium. The controller prevents buffer underrun...
7224660 Optical disk device and method of recording optical data  
The present invention relates generally to an optical disk device that records and reproduces information on and from an optical recording medium, such as a compact disk or a digital versatile...
7218586 Intermittent optical disc recording method and optical disc drive splitting data  
Because a series of data is recorded continuously, the recording quality of data recorded in course of recording cannot be evaluated. Accordingly, the laser output cannot be controlled properly and...
7200081 Write strategy circuit, write strategy method, and optical disk apparatus  
A write strategy circuit and a write strategy method for capturing data are disclosed. A strategy clock generator generates a strategy clock signal based on a channel clock signal. A phase...
7196989 Optical recording medium driving device  
A method and an apparatus for driving an optical recording medium for recording and/or reproducing various information for the optical recording medium, in which the output power ratio of the light...
7196987 Controller for data recorder  
A controller for controlling interruptions and restarts when writing data to a recording medium by emitting a laser beam against the recording medium. The controller prevents buffer underrun...
7190647 Information recording method and medium having optimum erasing power  
An information-recording method and an information-recording medium which make it possible to improve overwrite characteristics in the high speed recording, especially archival overwrite...
7177254 Optical recording method for high transfer rates  
An optical recording method that performs recording by irradiating optical recording media with laser beam modulated in intensity based on a write waveform is provided. The write waveform has a...
7177252 Method and apparatus for recording data on an optical disc  
A data recording device for recording data on an optical disc by irradiating a laser pulse on the optical disc while controlling rotation of the optical disc at a constant angular velocity. The...
7170840 Information recording method  
An information recording method in which an energy beam is irradiated to a recording medium and a basic recording pattern is generated. The basic recording pattern has a first power level provides...
7170838 Information recording and reproducing apparatus  
An optical information recording and reproducing apparatus that determines the quality of recorded information through a beta value from information on the amplitude of a reproduced signal and if...
7167428 Optical record carrier recording device and method comprising means for generating a timing signal having an increased timing resolution  
The invention relates to an optical record carrier recording apparatus and a corresponding method comprising a device for generating a timing signal having an increased timing resolution with...
7167427 Data recorder  
A data recorder for recording data that prevents buffer overrun errors emits a laser beam against a recording medium to record data. The data has a level that determines the power of the laser...
7161882 Method and arrangement for regulating the light power of a scanning beam in an apparatus for reading from or for writing to optical recording media  
In order to compensate for so-called clipping effects, it is proposed, in an apparatus for reading from and/or writing to an optical recording medium in which the light power of a laser diode ( 1 )...
7161881 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...
7154826 Information recording method, information recording medium and information recording apparatus  
An information-recording method and an information-recording medium which make it possible to improve overwrite characteristics in the high speed recording, especially archival overwrite...
7154825 Optical recording/reproducing apparatus with APC and ACC processes  
In an optical recording/reproducing apparatus of the present invention, a semiconductor laser driver supplies a selected one of a plurality of drive currents, including at least a first-level drive...
7139227 Device and method for recording data to optical disk using recording pulse with corrected edge position  
The present invention provides a device and method for an optical disc such as a DVD which can keep proper edge position of a recording pulse to record data of high quality without depending on a...
7126896 Information recording method, recording condition detection method, and information recording apparatus  
A plurality of pits representing recording target information are formed on an optical disk, while a laser light having a predetermined power is irradiated onto the optical disk. When information...
7123562 Method and device for determining a set of recording pulse series parameters for optical carrier recording and optical record carrier  
A method is described for determining a set of recording pulse series parameters for recording information on an optical record carrier. First a series of test patterns is written on the record...
7123561 Device that records on an optical disc and method thereof  
A device that records information on an optical disc and a method for recording the information on the optical disc, so as to maintain a constant recording quality when the information is recorded...
7116623 Optical information recording method, optical information recording device and optical information recording medium  
An optical information recording device includes a linear velocity setting circuit for setting a first linear velocity v 1 and a second linear velocity v 2 higher than the first linear velocity v...
7116616 Method for controlling an optical drive to record data  
A method for controlling an optical drive to record data onto a disc. The optical recorder has a pick up head for emitting laser onto the disc to record data onto the disc. The method includes...
7113473 Optical information recording apparatus for stable recording  
In an apparatus for recording information to an optical recording medium, a laser beam is irradiated to and reflected from the medium. A photodetector detects the light quantity of the irradiated...
7102970 Optical disk adaptable to record at high disk scanning speed, and related apparatus and method  
A laser-beam-scanned optical disc includes an information recording area and an information management area. The information management area stores recording management information having portions...
7082088 Optical recording medium and optical recording method by irradiation  
On a recording layer ( 12 ) of a disc-shaped optical recording medium ( 10 ), a plurality of virtual recording cells ( 40 ) are assumed contiguously in a spiral or concentric fashion in a groove (...
7075870 Recording/reproducing apparatus for optical information recording medium and optical head  
A plurality of optical heads each of which comprises an independent light source and optical system are provided on the same side with respect to a recording medium having a plurality of recording...
7075863 Method of determining optimum tracking offset value during optimum power control (OPC) for optical disk drive  
A method of an optical disk drive for determining both an optimum write power and an optimum tracking offset value using a test area reserved for a conventional OPC operation by determining a...
7068579 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 (d 15 ) from a DVD-R ( 30 ) on which histories of recording speed information, write strategy, and...
7057996 Information recording method, information recording medium, and information recording apparatus  
An information recording apparatus having an energy beam generator for generating an energy beam, a power adjusting mechanism for setting a power level of the energy beam to a first power level...
7057989 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...
7050367 Optical information recording method and apparatus, and recorded medium where optical information recording control program is recorded  
An optical information recording method and a device which can record information with a laser light irradiating direction kept constant even if an information recording surface of an optical...
7035180 Optical information recording reproducing apparatus and recording method  
An attempt is made to prevent an adequate recording power detection lag from being generated according to data from a defective area at trial writing, by detecting a defective area portion based on...
7020061 Device and method for preventing excess current flowing into pick-up head of optical storage device  
A method for detecting a current through a pick-up head in an optical storage device. An output value is first set and a root-mean-square value corresponding to the current is further obtained....
7012870 Optical recording method, optical recording medium and optical irradiating time controlling device  
An optical recording method for irradiating an optical recording medium 10 with a laser beam to form recording marks 48 A to 48 G. The method includes defining contiguously a virtual recording...
7009923 Method of and apparatus for recording information  
A method of recording information in which each recording mark is formed in a recording medium, by irradiating a pulse chain of an energy beam including a first pulse, a middle pulse chain, a last...
Matches 1 - 50 out of 159 1 2 3 4 >