Patent application number | Description | Published |
20080285408 | Optical Disk Device and Optical Disk Semiconductor - Search time increases if spherical aberration has to be varied for each radial location due to the influence of a disk or lens tilt. An optical disk device includes a spherical aberration search unit (spherical aberration setter | 11-20-2008 |
20090010126 | OPTICAL DISK APPARATUS, CONTROL METHOD OF OPTICAL DISK APPARATUS, AND INTEGRATED CIRCUIT - A disk motor which rotationally drives an optical disk; a rotational phase detector which detects a rotational phase thereof; an optical head having a collecting lens which collects an optical bean; a light detector and an LE signal generator which detect a position of the collecting lens in the optical head as a position signal; an LE signal memory recorder and an LE signal memory which store, in synchronization with a rotational phase to be detected by the rotational phase detector, the positional signal from the LE signal generator; an LE signal memory regenerator which outputs as a correction signal, in synchronization with a rotational phase to be detected, the positional signal which has already been detected; a subtractor; an LE signal filter, a drive circuit and a Tk actuator which move the collecting lens using a signal from the subtractor; and a low pass filter which reduces a high-frequency component of the correction signal are provided. | 01-08-2009 |
20090028028 | OPTICAL DISC, AND INFORMATION RECORDING/REPRODUCING METHOD AND INFORMATION RECORDING/REPRODUCING APPARATUS USING THE SAME - The present invention provides a method for recording/reproducing information on/from an optical disc, wherein the optical disc has a first to an n-th recording layers (n is an integer of 2 or greater) laminated on a substrate, each of the first to the n-th layers having data regions segmented into a first to an m-th data zone groups (m is an integer of 2 or greater) along a radial direction of the optical disc, each of the first to the m-th data zone groups including at least one data zone, the method comprising the steps of: a) recording/reproducing information in/from data zone groups from a j-th data zone group of a first recording layer to a j-th data zone group of an n-th recording layer; and b) repeating step a) for j=1, 2, . . . , m. | 01-29-2009 |
20090147645 | METHOD FOR INSPECTING OPTICAL INFORMATION RECORDING MEDIUM, INSPECTION APPARATUS, OPTICAL INFORMATION RECORDING MEDIUM AND RECORDING METHOD - A method for inspecting an optical information storage medium includes the steps of: irradiating the storage medium with a laser beam and rotating the medium by a constant linear velocity control technique by reference to the radial location at which the laser beam forms a spot on the medium; changing the rotational velocities according to the radial location on the medium between at least two linear velocities that include a first linear velocity Lv | 06-11-2009 |
20100110853 | METHOD FOR INSPECTING OPTICAL INFORMATION RECORDING MEDIUM, INSPECTION APPARATUS, OPTICAL INFORMATION RECORDING MEDIUM AND RECORDING METHOD - A method for inspecting an optical information storage medium includes the steps of: irradiating the storage medium with a laser beam and rotating the medium by a constant linear velocity control technique by reference to the radial location at which the laser beam forms a spot on the medium; changing the rotational velocities according to the radial location on the medium between at least two linear velocities that include a first linear velocity Lv | 05-06-2010 |
20100118673 | METHOD FOR INSPECTING OPTICAL INFORMATION RECORDING MEDIUM, INSPECTION APPARATUS, OPTICAL INFORMATION RECORDING MEDIUM AND RECORDING METHOD - A method for inspecting an optical information storage medium includes the steps of: irradiating the storage medium with a laser beam and rotating the medium by a constant linear velocity control technique by reference to the radial location at which the laser beam forms a spot on the medium; changing the rotational velocities according to the radial location on the medium between at least two linear velocities that include a first linear velocity Lv | 05-13-2010 |
20100238777 | OPTICAL DISK DEVICE, METHOD OF CONTROLLING OPTICAL HEAD, AND CONTROL DEVICE FOR OPTICAL HEAD - An optical disk device includes a DPDTE signal generating section that detects misalignment between a light spot and a mark or a pit, an FE signal generating section, an optical crosstalk correcting section which corrects a signal output by the FE signal generating section using the DPDTE signal generating section, and a focus control section which controls an actuator so that a light beam converges on an information layer. The DPDTE signal generating section detects the misalignment on the basis of phase information obtained from signals received from predetermined light receiving areas. The optical crosstalk correcting section performs a correcting operation of removing a signal component from predetermined receiving areas of a detector which component is used for a DPDTE signal, the signal component being contained in the signals from the predetermined light receiving areas of the detector which signals are used by the FE signal generating section. | 09-23-2010 |
20100246350 | OPTICAL DISC DEVICE AND LASER POWER CONTROL METHOD - An optical disk apparatus according to the present invention generates a divided clock signal by dividing a recording clock signal, and based on the divided clock signal, determines a test emission pattern for test recording which is used for controlling the power of a light beam that is output from an emission section. When the linear velocity at recording changes, the division ratio is adjusted in a direction of reducing a change in frequency of the divided clock signal. In an optical disk apparatus which performs laser power control by conducting a test emission with multipulses in a test area, a good detection accuracy of a multi-pulse average value can be maintained even at high x-speeds. | 09-30-2010 |
20110222384 | OPTICAL DISC DEVICE AND OPTICAL DISC DEVICE DRIVE METHOD - An optical disc apparatus of the present invention records and/or reproduces data to/from an optical disc where data is recorded on one of a groove track and a land track. The optical disc apparatus includes an identification section for identifying the type of the optical disc as being either an optical disc where data is recorded or reproduced to/from a groove track or an optical disc where data is recorded or reproduced to/from a land track. The identification section identifies the type of the optical disc while in a state where a focus control is being performed and a tracking control is not being performed. | 09-15-2011 |
20110296447 | METHOD FOR INSPECTING OPTICAL INFORMATION RECORDING MEDIUM, INSPECTION APPARATUS, OPTICAL INFORMATION RECORDING MEDIUM AND RECORDING METHOD - A method for inspecting an optical information storage medium includes the steps of: irradiating the storage medium with a laser beam and rotating the medium by a constant linear velocity control technique by reference to the radial location at which the laser beam forms a spot on the medium; changing the rotational velocities according to the radial location on the medium between at least two linear velocities that include a first linear velocity Lv | 12-01-2011 |
20120170436 | LASER POWER CONTROL METHOD AND LASER POWER CONTROL APPARATUS - With a large capacity of an optical disk and high-speed recording, a frequency of a recording signal is increased and a pulse width is narrowed. In the case that a laser is driven by a signal having the short pulse width, unfortunately the high-speed recording is hardly performed to an optical disk when a rise time and a fall time of the optical pulse are lengthened. | 07-05-2012 |
20130016594 | OPTICAL DISK APPARATUSAANM Kondo; KenjiAACI OsakaAACO JPAAGP Kondo; Kenji Osaka JPAANM Fujiune; KenjiAACI OsakaAACO JPAAGP Fujiune; Kenji Osaka JPAANM Yamamoto; TakeharuAACI OsakaAACO JPAAGP Yamamoto; Takeharu Osaka JP - Provided is an optical disk apparatus capable achieving stable focus control or tracking control. A first detector receives reflected light from an object lens optical system, a second detector receives reflected light from a prescribed information layer, a positional deviation determination unit determines positional deviation between a focal point of a light beam and a point where information on the prescribed information layer is recorded or reproduced, on the basis of a signal from the second detector, a stray light determination unit determines a surface stray light component which is reflected light from the surface of an optical disk and is included in the signal from the positional deviation determination unit, on the basis of the signal from the first detector, and a stray light correction unit corrects the signal output from the positional deviation determination unit on the basis of the surface stray light component thus determined. | 01-17-2013 |
20130100787 | OPTICAL INFORMATION APPARATUS AND INFORMATION RECORDING OR REPRODUCING METHOD - An optical head ( | 04-25-2013 |
20130121122 | OPTICAL INFORMATION DEVICE AND LOSS-OF-CONTROL DETECTION METHOD - Provided is an optical disc device including a focus control unit for performing control so that a convergent point of a main beam converges on a predetermined information layer, a tracking control unit for performing control so that the convergent point of the main beam scans a predetermined track or a predetermined mark sequence on an information layer, a sub beam receiving unit for receiving a sub beam reflected off the information layer and outputting a signal according to an amount of beam received, and a microcomputer for detecting, during a recording operation of recording the information, a focus loss-of-control state where the convergent point of the main beam deviates from the predetermined information layer or a tracking loss-of-control state where the convergent point of the main beam deviates from the predetermined track or the predetermined mark sequence on the information layer. | 05-16-2013 |
20140168110 | TACTILE INPUT AND OUTPUT DEVICE - A tactile input and output device includes: a panel; a touch information obtaining unitobtaining touch positions; an order input determining unit determining setting information; a vibration position determining unit determining a first touch position and a second touch position, the first touch position observed in a spatial order, and corresponding to the determined setting information, and the second touch position being another one of the touch positions than the first touch position; and a multi-point simultaneous vibration control unit controlling the vibration on the panel to provide a predetermined vibration to the first touch position and provide no predetermined vibration to the second touch position. | 06-19-2014 |
20140233362 | INFORMATION DEVICE - An information device includes a slider ( | 08-21-2014 |
20140375602 | TACTILE PRESENTATION APPARATUS AND TACTILE PRESENTATION METHOD - An apparatus according to an embodiment includes: a plurality of vibrating sections configured to cause vibration in a touch section to receive a touch made by a user; a first determination section configured to determine a plurality of vibration points on the touch section; a second determination section configured to determine a plurality of target vibrations, respectively, at the plurality of vibration points; and signal generation sections configured to generate a plurality of driving signals for respectively driving the vibrating sections, based on vibration transfer characteristic profiles obtained according to the positions of the plurality of vibration points and main component frequencies of the plurality of target vibrations, and on the plurality of target vibrations. The signal generation sections generate the plurality of driving signals based on a plurality of transfer characteristic profiles respectively corresponding to the plurality of target vibrations near the main component frequencies. | 12-25-2014 |