Matches 1 - 25 out of 25
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7616536 Apparatus for radial tracking in an optical disc drive using tracking an error signal derived from wobble-induced signal components and/or data-induced signal components of a detector output  
An optical disc drive uses a tracking error signal derived from the wobble-induced signal components of the optical detector signal. This tracking error signal is relatively insensitive to...
7616533 Optical disc apparatus and access control method of the same  
An optical disc apparatus, as a learning operation before a recording or reproducing operation, rotates an optical disc at a first speed to read PID information, discriminates between lands and...
RE40946 Optical disk apparatus  
An optical disk apparatus comprises a focusing means for focusing a light beam on a recording medium having first and second information faces; means for moving a focal point of the light beam in a...
7590034 Method for detecting servo error, apparatus therefor, disk which maintains quality of servo error signal, method of controlling servo of disk recording/reproducing apparatus, method of detecting tracking error, and method of detecting tilt error  
An apparatus for recording data on and reproducing data from the disk in which a recording area is divided into sectors, includes a reproducing signal generator for generating a reproducing signal...
7586818 Optical disc apparatus and semiconductor device  
The purpose is to provide an optical disc apparatus which can accurately calculate a gain for focus control. An optical apparatus ( 100 ) includes: an FE generator ( 20 ) for generating an FE...
7586816 Playback apparatus and layer jump method  
A playback apparatus that plays back a recording medium having recording layers includes an optical head irradiating the recording layers with laser light using an objective lens and reading...
RE40895 Optical head and apparatus for and method of storing and reproducing optical information  
In a optical head, a beam is emitted from a light emitting element in which a plurality of light sources are integrally formed, the light sources being able to emit beams having different wave...
7577063 Calibration of a focus offset in an optical drive  
Calibration of a focus offset in an optical drive. A calibration pattern, comprising a plurality of marked areas, is marked upon a medium. A user input is received, identifying a perceived darkest...
7570550 Focus servo recovery processing method for optical disc device and optical disc device  
In an optical disc device employing a CLV method, executing pickup return processing when focus drop occurs during recording poses problems of increased waiting time for rotation and increased...
7570549 System and method for efficiently timing recalibration procedures in a disc drive apparatus  
A disc drive apparatus ( 1 ) is described, for writing/reading information into/from a storage medium ( 2 ), such as an optical disc. After start-up, multiple recalibration processes are executed,...
7558176 Method for preventing optical disk from being scraped  
The method prevents an optical disk from being scraped by an optical apparatus of a pickup head of an optical disc drive is disclosed, it mainly includes: moving the optical apparatus of the pickup...
7548492 Optical disk recording/reproduction device and search method for information recording area of optical disk in the same  
The optical disk recording/reproduction device is provided with an information recording area search means, comprising, a moving means which detects the presence and absence of information and...
7535805 System and method for detecting the location of an optical pick-up head  
Disclosed is a system for detecting a location of an optical pick-up head on an optical disk, and the optical disk comprises a plurality of sectors and the optical pick-up head emitting light to...
7525884 Position control apparatus and method for an optical disk recording/reproducing apparatus with interlinked on/off of a phase compensator and on/off of a servo loop  
The present invention aims to obtain a position control device which, even if the range within which a mechanical part can be pulled in for position control is narrow, enables quickly stabilizing...
7522482 Optical pickup device and apparatus for reading data from optical storage medium  
An optical pickup is provided for preventing an objective lens from colliding with an optical recording medium at the stage of initial adjustments. The optical pickup device comprises a servo...
7512042 Method of controlling focus of optical disk recording and reproducing device  
In an optical disk recording and reproducing device which uses an optical disk having at least a first recording layer and a second recording layer, a thickness of a spacer section between the...
7492678 Apparatus and method for stabilizing operation of disc driver in section for setting mode conversion  
An apparatus which stabilizes an operation of a disc driver in a mode conversion setting section includes a pickup which reads information from a disc that is inserted into the disc driver, a...
7486595 Tracking error detector  
A tracking error detector receives laser light that is irradiated onto tracks on a disc surface and that is reflected from the tracks by using a light-receiving device having divided portions,...
7480216 Optical information recording apparatus  
A rewritable optical disk apparatus, optical information recording and reproducing apparatus or the like is allowed to automatically and properly adjust the optical system to the optimum focal...
7460456 Radial control method for a device for reproducing information of an optical disk, and reproduction device for carrying out said method  
The invention relates to a radial slaving method and to a reproduction device implementing it for optical discs. In an optical head of a conventional reproduction device using a four-quadrant...
7457208 Method and apparatus for determining position of optical pick-up head  
The displacement of a pick-up head along the radial direction of an optical disk is detected, and the absolute position of the pick-up head is determined by the accumulation of the displacement,...
7443774 Optical head and data processing apparatus including the same  
An optical data processing apparatus reads and/or writes data from/on a data storage medium, in which first and second data storage layer are stacked, by radiating light from the second layer. The...
7440362 Optical disc drive which uses a train of pulses to shift the focus of a focusing section  
An optical disc drive includes: a light source; a focusing section; a focus shifting section for shifting the focal point of light by changing the position of the focusing section perpendicularly...
7406509 Dynamic switching of a communication port in a storage system between target and initiator modes  
A storage system includes a communication port, the mode of operation of which can be dynamically switched by a user between a target mode and an initiator mode. The port may be a Fibre Channel...
7400671 Periodic calibration for communication channels by drift tracking  
A method and system that provides for execution of a first calibration sequence, such as upon initialization of a system, to establish an operation value, which utilizes an algorithm intended to be...
Matches 1 - 25 out of 25