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| Number | Title | Issue Date |
| 7355585 | Input device and information processing apparatus with such input device and cursor display control method An input device may be used with the information processing apparatus and the like, and provides an improved ease of operation in moving the cursor on the display screen. The input device includes a set of cursor keys 1 that, when activated, cause the ... | 04/08/2008 |
| 7277362 | Audio signal reproduction apparatus having scratch reproducing function An audio signal reproduction apparatus for reproducing scratch sound from an optical disk. Scratch reproduction operation is performed through use of a jog dial and a turntable. When either the jog dial or the turn table has been actuated, a rotational operation sig... | 10/02/2007 |
| 7245571 | Optical disk drive that can adjust erase power during writing operation An optical disk drive that can automatically adjust an erase power to an appropriate level to keep the error rate low and not to shorten the life of an erasable optical disk. The optical disk drive obtains a reference erasing modulation factor using a test area of t... | 07/17/2007 |
| 7215611 | Compressed audio data editing method and apparatus A digital recording system for stereophonic audio signals is disclosed. Included is an MP3 encoder coupled to an ADC for encoding the two channels of digital audio signals into a compressed data stream. Before being directed into a flash memory for editing, the comp... | 05/08/2007 |
| 7212486 | Optical disk device setting a gain of an amplifier so that a peak value and a bottom value of wobble signal components coincide In this optical disk device, a reflected light of a light beam reflected from a pre-pit-formed side of a track wobbled on a disk is detected as a first detection signal. A reflected light of the light beam reflected from the other side of the track is detected as a ... | 05/01/2007 |
| 7185346 | Low-profile disk unit A disk unit includes a tray including a turntable to which a disk-like recording medium is attached, a tray guide mechanism supporting the tray so that the tray is movable between a disk-replacing position and a disk-loading position, and a cover formed to cover the... | 02/27/2007 |
| 7158457 | Optical disk device for recording at optimum recording power An optical disk device for estimating optimum recording power for high speed recording at an outer part of an optical disk, with high accuracy, even when an OPC for high speed recording at the outer part cannot be performed. The optical disk device includes a first ... | 01/02/2007 |
| 7136420 | Recording of super-audio or like one-bit-per-sample signals on a PCM recorder An eight-channel PCM recorder is utilized for recording two channels of delta-sigma modulated audio signals. Employed to this end is a PCM adapter comprising a bit stream divider for dividing the bit streams of the delta-sigma modulated signals into series of sixtee... | 11/14/2006 |
| 7130253 | Disk DVD-ROM drive unit with a playback speed control and disk drive method A disk drive unit for reproducing information recorded on a digital versatile disk (DVD). The disk drive unit has a copyright management information reading unit for reading copyright management information from a predetermined location on a DVD loaded into the disk... | 10/31/2006 |
| 7120110 | Signal processing circuit for noise elimination and demodulator circuit using the same for accurate demodulation A signal processing circuit for eliminating noise from an input binary signal includes a measurement part and a signal output part. The measurement part measures the cumulative period of time of at least one of high-level and low-level states of the input binary sig... | 10/10/2006 |
| 7092346 | Photodetector and optical pickup device A photodetector and optical pickup device which comprises: a monitoring photodetection element (photodiode) 23 for receiving laser beams having different wavelengths from laser light sources; a light source-discriminating photoreceiver 24 represented b... | 08/15/2006 |
| 7085210 | Optical disc drive having OPC control unit for controlling the level of power of the laser beam for recording and reading data from an optical disc An optical disc drive has an OPC control unit that records the signal to a plurality of frames in the predetermined test area on the optical disc using a plurality of recording power values and repeatedly records the signal to another plurality of frames in the pred... | 08/01/2006 |
| 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 coarsely adjusted laser power using a portion of the test area, determinin... | 07/11/2006 |
| 7020213 | Method and apparatus for selectively providing different electric signal paths between circuits A digital signal path selector is disclosed in its simplest form for selectively connecting two input terminals to two output terminals. Both input terminals and output terminals are laid out on a control panel, on which there are also provided two input select push... | 03/28/2006 |
| 6956805 | Signal processing circuit and method for extracting superimposed signal with accuracy A signal processing circuit, which extracts a signal superimposed on a reference signal and having a peak level higher than a level of the reference signal by a value greater than a given value, includes a first pulse generation part generating a first binary signal... | 10/18/2005 |
| 6954709 | Signal processing circuit outputting a signal representing the number of times an input signal rises in a predetermined period as a signal corresponding to a quality of the input signal A signal processing circuit outputs a signal corresponding to a quality of a digitized input signal. An edge counter of the signal processing circuit counts the number of times the input signal rises and/or falls in a predetermined period. An output unit of the sign... | 10/11/2005 |
| 6922842 | Optical pick-up device An optical pick-up device includes a lens that focuses light onto a recording medium, a lens holder that holds the lens, a suspension holder that supports the lens holder disposed opposite a distal end of the lens holder, a frame formed so as to be disposed opposite... | 07/26/2005 |
| 6914859 | Method of recording and/or reproducing information onto/from an information storage medium and an information-recording and/or information-reproducing device A method of recording and/or reproducing information onto/from an information storage medium includes the step of detecting a time interval between a received command and a subsequent command. The method further includes the step of controlling recording and/or repr... | 07/05/2005 |
| 6483656 | Pilot lamp current consumption reduction system for a flexible magnetic disk drive or the like A flexible magnetic disk drive to be USB interfaced with a computer, there being a maximum current limitation of 500 milliamperes to be carried by USB cables. The current consumption of the disk drive maximizes when both disk drive motor and stepper motor... | 11/19/2002 |
| 6469858 | Motor current consumption control system for a flexible magnetic disk drive or the like A disk drive for use with interchangeable flexible magnetic disks of potentially different weights, comprising a disk drive motor for imparting rotation to a disk loaded therein, and a stepper motor for moving a transducer across the track turns on the di... | 10/22/2002 |
| 5978166 | Method of and apparatus for positioning a rotary magnetic head drum in an arcuate scan system An apparatus for positioning at least one magnetic head relative to a magnetic tape for recording and reproducing information includes a head unit for holding at least one magnetic head and a moving unit for moving the head unit parallel to a surface of t... | 11/02/1999 |
| 5784350 | Disk drive apparatus which eliminates the disk eject button A disk drive apparatus which eliminates the eject button on a front bezel and eliminates the opening for the eject button is provided. A tray carries a recording medium, and is movable between an eject position in which the recording medium in the tray is... | 07/21/1998 |
| 5661705 | Optical disk pickup control apparatus and method providing stabilized search operations An optical disk drive is provided with a microcomputer for calculating the number of tracks on an optical disk traversed by an optical pickup in a seek operation and the number of steps to be taken in the seek operation. The number of steps determined in ... | 08/26/1997 |
| 5633768 | Sheet metal frame construction for a disk apparatus There is provided a frame construction for a disk apparatus of which manufacturing cost is reduced by reducing a number of parts and a number of assembly processes. A cartridge accommodating a recording medium is loaded in the disk apparatus. A driving un... | 05/27/1997 |
| 5627811 | Constant linear velocity optical disk apparatus having improved circuitry for speed data access An optical disk apparatus includes a disk servo unit which generates a servo signal based on a data signal read from an optical disk. The servo signal is supplied to a disk motor to control a rotation of the motor so that a linear velocity of the disk is ... | 05/06/1997 |
| 5623468 | Disk apparatus for detecting address marks from a recording disk having data recorded in a zoned constant angular velocity type system Disk apparatus for detecting address marks in the data of a zoned constant angular velocity (ZCAV) recording disk. The apparatus includes a detecting unit for detecting sector marks in the data. Time delay circuitry establishes a time delay between sector... | 04/22/1997 |
| 5610781 | Interchangeable eject mechanism for use with various disk drive units A disk drive unit has a main body including a loading/ejecting mechanism for loading a recording disk set at an initial position to a loading position and for returning the recording disk from the loading position to the initial position, the loading/ejec... | 03/11/1997 |
| 5602812 | Reproducing rate control apparatus for optical disk A reproducing rate control apparatus for an optical disk includes a synchronizing clock generating unit which generates a synchronizing clock pulse with a phase locked to a phase of a digital reproduction signal. A signal processing unit generates a demod... | 02/11/1997 |
| 5590105 | Disk apparatus using constant linear velocity method and having head function stopped in standby mode A disk apparatus using a CLV method is provided in which disk apparatus a power consumption is reduced by providing a power save mode in which an operation of a head driving system is stopped during a standby state. The disk apparatus uses a constant line... | 12/31/1996 |
| 5566368 | Cassette compartment mechanism having member for closing cassette lid when cassette is withdrawn A holder unit receives a cassette therein, the cassette containing a recording tape and having a lid unit thereon. A lid pressing member comprises a pair of sliding portions which come into contact with two opposite end portions of the lid unit of the cas... | 10/15/1996 |
| 5550447 | Pulse generating system responding to instruction pulses for generating driving pulses for diving motor A pulse generating unit responds to a series of instruction pulses to generate a series of driving pulses which includes alternately occurring first driving pulses and second driving pulses. The pulse generating unit generates the first driving pulses dir... | 08/27/1996 |
| 5535183 | Optical disk reproducing device and its seek operation method An optical disk device generating reproduced data based on a reproduced digital signal which is derived by tracking a track on an optical disk with an optical pickup is shown. A bit-frequency-information generation unit measures a bit frequency of the rep... | 07/09/1996 |
| 5532994 | Disk storage having notched front bezel A thin disk storage to and from which a disk cartridge accommodating a disk is inserted and ejected. A front bezel of the disk storage includes a concave portion having a concave shape when viewed from a direction perpendicular to a recording surface of t... | 07/02/1996 |
| 5526341 | Test disk having defect patterns uniformly distributed in recording areas A test disk having defect patterns uniformly arranged in recording areas is produced by a production method including: producing a stamper having a plurality of data pits in accordance with test data signals recorded on the test disk; radiating laser ligh... | 06/11/1996 |
| 5519688 | Spindle motor mounting structure and disk unit having the same A spindle motor mounting structure for a disk or a disk cartridge recording/reproducing apparatus includes a substrate, a spindle motor including a stator part fixed on the substrate, a spindle shaft, and a disk shaped rotor part rotatably supported on th... | 05/21/1996 |
| 5508857 | Magnetic head loading/unloading apparatus maintaining a magnetic head at predetermined positions by permanent magnets A magnetic head loading/unloading apparatus has a head arm being maintained in either a loading state or an unloaded state by means of a permanent magnet. The head arm has a magnetic head on one end thereof, and is fixed on an end of a first yoke. A secon... | 04/16/1996 |
| 5485336 | Magnetic recording and/or reproducing head with slider A magnetic head comprises cores made of a magnetic substance that forms a magnetic circuit via a gap when a magnetic flux is induced there. The magnetic head also comprises a plurality of coils that are wound around the cores and induce a magnetic flux in... | 01/16/1996 |
| 5467235 | Lid mechanism, for recording-medium insertion opening, having lid deformation control construction An axis mechanism supports a lid on a periphery of an opening so that the lid can rotate about a rotational axis. At least a part of the lid can move along a direction perpendicular to the rotational axis in a manner different from the manner of the rotat... | 11/14/1995 |
| 5455809 | Disk apparatus having magnetic head for magneto-optical recording device An magneto-optical disk apparatus has a magnetic head assembly a magnetic head slider loading mechanism. The magnetic head assembly has a magnetic head slider and a support arm for supporting the magnetic head slider. The magnetic head slider loading mech... | 10/03/1995 |
| 5453891 | Head-arm mechanism used in disk apparatus having head-arm holding function A head-arm mechanism comprises a head-arm being provided with a head. The head-arm is supported so that the head-arm can rotate. The head-arm mechanism also comprises a first driver. The first driver drives the head-arm to rotate so as to make the head mo... | 09/26/1995 |
