| Entries |
| Document | Title | Date |
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| 20080205223 | Poor recording detection device and image recording apparatus using it - The present invention comprises an illumination unit for applying illumination light to the recording medium after recording on a recording medium and a camera unit for picking up an image recorded on the recording medium to which the illumination light is applied by the illumination unit and outputting detected information. The present invention outputs reference detection information obtained by detecting a reference recording image by the camera unit after recording the reference recording data on the recording medium as input recording data, generates correction information by comparing the reference detection information with the reference recording data and generates corrected input recording data obtained by correcting the input recording data on the basis of the correction information, and also detects poor recording on the comparison result between the input recording image information and the corrected input recording data after recording the input recording data on the recording medium. | 08-28-2008 |
| 20080253248 | SYSTEM AND METHOD FOR CALIBRATING RECORDING TRACK OFFSET OF OPTICAL STORAGE DEVICE - A system and method for calibrating a recording track offset of an optical storage device accessing an optical storage medium of land/groove type. The system includes: a tracking servo loop arranged to control tracking operations of an optical head of the optical storage device; a track offset control loop arranged to control the recording track offset for the tracking servo loop; a controller arranged to enable a latest value of the recording track offset to be a readout value for utilization in a recording process performed later; and a comparator arranged to compare a recording length with a threshold value and generate a flag to represent whether the recording length is a long recording length, wherein the latest value is derived from the track offset control loop. | 10-16-2008 |
| 20090003167 | TRACKING ERROR SIGNAL DETECTION DEVICE AND OPTICAL DISC APPARATUS - A tracking error signal detection device employing a differential phase detection method includes first and second differentiators which remove direct current components in first and second signal groups in which a phase difference between the first and second signal groups changes in accordance with a tracking error signal, and which differentiate the first and second signal groups, first and second analog/digital converters which sample and quantize signals output from the first and second differentiators, respectively, a Hilbert transformer performing a 90-degree phase shift on one of signals output from the first and second analog/digital converters, a delay circuit delaying one of the signals output from the second and first analog/digital converters by an amount of delay equal to that caused by the Hilbert transformer, and a phase comparator calculating a phase difference between a signal output from the Hilbert transformer and a signal output from the delay circuit. | 01-01-2009 |
| 20090040891 | OPTICAL STORAGE DEVICE CAPABLE OF OPERATING WHEN ABNORMAL, AND RELATED METHOD - An optical storage device capable of operating when abnormal, includes: a control unit for controlling operations of the optical storage device; and a sensor coupled to the control unit, where in a normal mode of the optical storage device, the control unit triggers the start-up or stop of a procedure through the sensor. The control unit is capable of controlling the optical storage device to enter an abnormal mode, and triggering the start-up or stop of the procedure in the abnormal mode according to whether the procedure times out or according to a user command. | 02-12-2009 |
| 20090279403 | OPTICAL DISC DEVICE - Light emitted from a radiation light source | 11-12-2009 |
| 20100027396 | DROP-OUT DETECTING CIRCUIT AND OPTICAL DISC DEVICE - An optical disc apparatus according to the present invention includes: an optical head | 02-04-2010 |
| 20100074077 | OPTICAL HEAD DEVICE AND OPTICAL INFORMATION RECORDING/REPRODUCING DEVICE - Provided are an optical head device and an optical information recording/reproducing device, which can record/reproduce information to/from at least three kinds of optical recording media of different standards. A light beam emitted from a semiconductor laser is converged on a disk by an objective lens, and a reflected light beam from the disk is received by a photodetector. The optical system includes a liquid crystal refracting lens which can change the focal distance continuously within a predetermined range. The liquid crystal refracting lens has an electrode, and corrects, when the voltage applied to the electrode is changed, such a spherical aberration in the emitting light as changes with the kind of the disk. Moreover, a liquid crystal aperture control element has an electrode, and changes the effective numerical aperture of the objective lens in accordance with the kind of the disk, when the voltage applied to the electrode is changed. | 03-25-2010 |
| 20100124154 | SIGNAL PROCESSING DEVICES AND SIGNAL PROCESSING METHODS - A signal processing device includes a processing circuit and a signal generating circuit. The processing circuit is implemented for determining a position of at least one defective area on an optical storage medium according to a defect signal, and accordingly recording defect position information of the at least one defective area. The signal generating circuit is coupled to the processing circuit, and implemented for generating an output signal according to at least the recorded defect position information of the at least one defective area. | 05-20-2010 |
| 20100135139 | OPTICAL TAPE TEST SYSTEM - Disclosed herein are aspects of optical tape technology, tape manufacturing, and tape usage. Methods and systems of tape technology disclose optical tape media including: configurations, formulations, markings, and structure; optical tape manufacturing methods, systems, and apparatus methods and systems including: curing processes, coating methods, embossing, drums, testing, tracking alignment stamper strip; optical tape methods and systems including: pick up head adapted for the disclosed optical tape; and optical tape uses including optical storage media devices for multimedia applications | 06-03-2010 |
| 20100202264 | RECORDING METHOD FOR OPTICAL DISC DEVICE - An optical disc device recording method, which includes determining whether or not a recording process that records information on a label surface of an optical disc has failed, detecting a recording failure position at which the recording process has failed when the determining step determines the recording process has failed, and resuming the recording process from the detected recording failure position. | 08-12-2010 |
| 20100278025 | OPTICAL DISC DEVICE, OPTICAL DISC RECORDING METHOD, AND REPRODUCTION METHOD - Even when recording data which is continuously inputted at a high speed, it is possible to correct a recording error and reproduce preferable AV data without a noise upon reproduction. A recording error detection circuit ( | 11-04-2010 |
| 20100329093 | DISK INSPECTION APPARATUS - A disk inspection apparatus for discriminating disks. The disk inspection apparatus has an ECC control section and a comparison section. The ECC control section measures the number of error corrections PIE and the number of error correction failures PIF in a predetermined section of the disk. The comparison section discriminates the disk as a disk with a deterioration in jitter characteristic when the minimum or the average of the PIE exceeds a first threshold value; discriminates the disk as a normal disk when the maximum of the PIF is equal to or smaller than a second threshold and the minimum or the average of the PIE is equal to or smaller than the first threshold value; and discriminates the disk as a scratched disk when the minimum or the average of the PIE is equal to or smaller than the first threshold value and the maximum of the PIF exceeds the second threshold value. | 12-30-2010 |
| 20110075536 | CONTENT RECORDING METHOD AND APPARATUS - A method and apparatus for recording contents. The method includes recording contents on a disc; verifying whether an error occurs in the recording; and reducing the number of available recordings of the contents, which is included in recording authority information, by 1, if an error does not occur in the recording. According to the method, if an error occurs in recording, the number of available recordings may be prevented from being unreasonably reduced. | 03-31-2011 |
| 20110090776 | OPTICAL HEAD DEVICE, OPTICAL INFORMATION PROCESSING APPARATUS, AND SIGNAL DETECTING METHOD - An optical head device includes a light source configured to emit a light beam, a light collecting optical system configured to converge the light beam onto an information recording medium, a hologram element configured to diffract the light beam reflected from the information recording medium, and a photodetector having a plurality of detection regions configured to receive the light beam diffracted by the hologram element. The hologram element has a plurality of diffraction regions separated from each other by a straight line extending in a track direction of the information recording medium. At least one of the plurality of diffraction regions has a pattern which introduces coma aberration in the track direction to the diffracted light. | 04-21-2011 |
| 20110096650 | METHOD OF GENERATING MEMORY DISC IN OPTICAL DISC DRIVE - A method of generating a memory disc in an optical disc drive is provided. A request for a change of an optical disc inserted in the optical disc drive into a memory disc is confirmed by detecting if a button included in the optical disc drive is operated. When the request is confirmed, the format of the optical disc may be changed. When an eject button is pushed in a predetermined pattern, for example, when the eject button is pushed for longer than a first reference time or pushed more than twice within a second reference time, the optical disc is initialized into a blank disc, file system data corresponding to the memory disc is recorded in a specific region of the blank disc according to ISO image generating program stored in a non-volatile memory included in the optical disc drive, and the blank disc is formatted. | 04-28-2011 |
| 20110164486 | OPTICAL DISC APPARATUS - An optical disc apparatus for use of an optical disc including a plurality of recording layers sets an amount of correction of spherical aberration for each of the recording layers of the disc during a focus sweep. A photodetector portion produces a signal in response to returned light for each of the recording layers. | 07-07-2011 |
| 20120014238 | SPHERICAL ABERRATION COMPENSATION METHOD AND DEVICE OF OPTICAL DISC DRIVE - A spherical aberration compensation method is provided. A first thickness of a cover layer at a first radius position of an optical disc is measured. A second thickness of the cover layer at a second radius position of the optical disc is measured. A spherical aberration calibration is performed at a third radius position of the optical disc to obtain an optimal spherical aberration compensation value. According to the first and second radius positions, the first and second thicknesses, and the optimal spherical aberration compensation value at the third radius position, a spherical aberration compensation formula is acquired. Afterwards, an updated spherical aberration compensation value is calculated by the spherical aberration compensation formula according to a fourth radius position where an optical pickup head of the optical disc drive is located. The updated spherical aberration compensation value is inputted into a spherical aberration compensator of the optical disc drive. | 01-19-2012 |
| 20120087222 | DISC INSPECTING METHOD AND DISC INSPECTING DEVICE - A disc inspecting method includes: forming recording marks on a disc; scanning the recording marks from inside to outside or from outside to inside of the disc by a pickup unit to read a reproduction signal while rotating a spindle to move a slider by each predetermined width; acquiring reproduction data from the reproduction signal in a signal acquiring unit; and determining whether or not the reproduction data is proper in a calculation unit, and optimizing a formation condition of the recording marks when it is determined that the reproduction data is not proper. | 04-12-2012 |
| 20120113781 | OPTICAL DISK APPARATUS - An optical disk apparatus according to the present invention includes: a drive selector | 05-10-2012 |
| 20120127843 | SERVOING SYSTEM FOR MASTER WITH PARALLEL TRACKS IN A HOLOGRAPHIC REPLICATION SYSTEM - Techniques are provided for controlling the reading of optical data from a master disk in a holographic replication system. Imperfections in the master disk or movement of the disk during a recording process may cause source beams to deviate from target data tracks. In some embodiments, a detector system is used to determine the focus and alignment of the source beams on the master disk, as well as the tilt and rotation of the disk with respect to the holographic replication system. The detector system may detect deviations in the intensity distribution of the reflections of the source beams and generate an error signal corresponding to focusing, tracking, tilt, and/or rotational errors. Servo-mechanical devices may actuate optical components to compensate for such errors. | 05-24-2012 |
| 20120201111 | OPTICAL DISK REPRODUCING DEVICE AND PHASE-LOCKED LOOP CIRCUIT - An optical disk reproducing device for controlling false detection of synchronization signals due to intersymbol interference, and stably improving accuracy of frequency acquisition of a phase locked loop (PLL) even when offset and so on occur. A signal width close to an original mark length is obtained to use for frequency acquisition of the PLL by, for example, using two different slice thresholds and taking a width between a rising of a result of slicing at one threshold and a falling of a result of slicing at the other threshold as a synchronization signal width. When asymmetric properties due to offset, asymmetry, etc. occur, an amount of corrections on the slice threshold is calculated, and it is reflected on a threshold previously set to always obtain a correct synchronization signal width. | 08-09-2012 |
| 20120294133 | OPTICAL PICKUP, OPTICAL DISK DRIVE DEVICE, OPTICAL INFORMATION RECORDING DEVICE, AND OPTICAL INFORMATION REPRODUCTION DEVICE - An optical pickup, an optical disk drive device, an optical information recording device, and an optical information reproduction device in which a reproduction signal, a focus error signal, and a gap error signal can be detected with high accuracy when information is recorded/reproduced on/from an optical information medium having a plurality of information recording layers. The optical pickup includes a focusing lens group ( | 11-22-2012 |
| 20160155469 | REPRODUCING DEVICE | 06-02-2016 |
