Abstract: There is provided an optical disk drive that pursues power saving and simultaneously assures data recording quality. A servo processor of the optical disk drive has a low frequency equalizer, a high frequency equalizer, a limiter, and an adder. A limit voltage value of the limiter is set by means of a control command from a system controller. The limit voltage value is set so as to become greater during a data recording period than in a data regeneration period. An output from the adder is supplied as a tracking drive signal to a tracking actuator or as a focus drive signal to a focus actuator.

Abstract: A demodulation circuit accurately demodulates a wobble signal of an optical disk without being affected by a phase shift induced by crosstalk. An A-D converter subjects wobble signal reproduced from an optical disk to A-D conversion and feeds a result of conversion to a zero-crossing detection circuit. The zero-crossing detection circuit detects zero-crossing points of the wobble signal. A sinusoidal wave generation circuit generates a sinusoidal wave by means of sequentially connecting sinusoidal wave elements whose periods are each equal to a time interval between zero-crossing points. A multiplier multiplies an original wobble signal by a sinusoidal wave signal. A slicer detects an HMW-modulated portion of the wobble signal, and another slicer detects an MSK-modulated portion of the wobble signal.

Abstract: An optical disk device has a casing, an insertion slot and a loading mechanism for loading a disk. A shutter is shiftable transversely to an elongate slot shape of the insertion slot, closes the insertion slot partially when in a closed position, and opens the insertion slot when in an open position. A coupling hole is disposed at an end of the shutter with respect to the elongate slot shape. A shift lever moves the coupling hole in a first direction along the elongate slot shape upon shifting of the loading mechanism for loading, and moves the coupling hole in a second direction upon shifting of the loading mechanism for unloading. A cam mechanism shifts the shutter to the closed position when the coupling hole is moved in the first direction, and shifts the shutter to the open position when the coupling hole is moved in the second direction.

Abstract: 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.

Abstract: An optical disk device which flexibly and efficiently executes verification of recorded data is provided. A drive controller sets an area to be verified and a mode of verification according to a command which is supplied from a host device. For the area to be verified, the user selects one or a plurality of lead-in, inner, middle, and outer areas. For the verification mode, the user selects one of an immediate execution mode and an in-close-command execution mode. In a duplicator or the like in which same data is recorded on a plurality of optical disks, the user can designate an important data portion and selectively execute verification.

Abstract: An optical disk apparatus for enhancing time resolution of an RF sum signal. A reproduction sum signal (a signal A+a signal D) on the leading side and a reproduction sum signal (a signal B+a signal C) on the following side, which have been output from a four-quadrant photodetection section of an optical pickup, are supplied to first and second A/D converters. The first A/D converter samples a signal in accordance with a first clock signal CLK, and the second A/D converter samples a signal in accordance with a second clock signal CLK. The first and second clock signals CLK are out of phase with each other. By means of a phase difference between the clock signals, a phase difference between the leading-side reproduction signals and the following-side reproduction signals is compensated for. The phase difference between the first and second clock signals CLK is adjusted such that the quality of a reproduction signal, such as jitter, an error rate, or the like, is optimized.

Abstract: A disk unit is disclosed wherein a disk inserted by a pivoting arm is loaded to the interior of the disk unit or a disk accommodated in the interior of the disk unit is unloaded to the exterior of the disk unit, the disk unit including a plurality of arms able to convey two types of disks different in diameter while supporting an outer periphery edge of each of the disks.

Abstract: An optical disk processing system having a recording unit and a printing unit is provided. An optical disk processing system comprises a printing unit and a recording unit. An optical disk is driven with a low torque and then with a high torque. Based on reaching times until target rotational speeds are reached when the optical disk is driven with the low torque and the high torque, a type of the optical disk is judged. Loading of a plurality of optical disks is detected when the judgment results for low torque and for high torque do not match.

Abstract: An optical disc apparatus reliably executes a seek operation even if an optical disc is warped. Tilt adjustment values spanning from the inner circumference to the outer circumference of an optical disc are stored. When seeking from a start address to a destination address, a tilt adjustment value A at the start address and a tilt adjustment address C at the destination address are not directly used. A tilt adjustment value k·C (k<1) is used during a coarse seek operation until the neighborhood of the destination address and a tilt adjustment value C is used during a fine seek operation from the neighborhood of the destination address to the destination address.

Abstract: A CPU of an overdubbing device plays back a music file recorded in a memory card of the device and outputs the file as a played-back audio signal while mixing the played-back audio signal with an external audio signal input from the outside, to thus perform overdubbing. A music file recorded through overdubbing last time is automatically set as a playback music file for the next time, and a selected state of means for selecting execution/nonexecution of overdubbing is maintained as the state of execution. As a result, overdubbing is enabled by twice operations of a record key, whereby the operation is made identical with operation performed during ordinary recording. Further, playback is performed by changing either playback speed or musical interval of the playback music file.

Abstract: A disk drive controls the rotational speed of a disk to an appropriate value. A system controller of the drive stores data read from a disk and read-ahead data into buffer memory. A time interval ti at which the buffer memory becomes full is measured, and the time interval ti is compared with a predetermined lower limit value t1 and a predetermined upper limit value t2. When a relationship of ti>t2 stands, rotational speed is increased. When a relationship of ti<t1 stands, control is performed in such a way that the rotational speed is decreased so as to achieve t1?ti?t2.

Abstract: In an optical disk drive, running OPC (ROPC) is performed without fail, to thus enhance recording quality. ROPC is performed by use of a remaining portion of an area for APC operation within an APC area of a recording unit (RUB) in a next-generation optical disk such as a blu-ray disk. ROPC is performed by means of tentatively writing test data having a length of 50 T longer than a specified length of data to be recorded; and detecting level B of the amount of light reflected at that time. The APC area is formed from five wobble periods. APC is performed in periods of first two wobbles, and ROPC is performed in remaining three wobble periods.

Abstract: There is disclosed a device which realizes a shortcut function without providing any key exclusively used for the shortcut function. When a home key is operated in a state where a lower screen at a lower position of a hierarchical structure is displayed, a home screen at an upper position of the hierarchical structure is displayed, and data to specify the lower screen when the home key is operated are stored in association with the home key. When the home key is operated in a state where the home screen is displayed, the lower screen is displayed based on the stored data to take a shortcut to the lower screen from the home screen.

Abstract: An optical disk drive capable of reproducing data even when defects, such as flaws or stains, are present in the disk. A system controller of an optical disk drive reproduces data by setting the maximum speed in accordance with the type of an optical disk, an amount of side-to-side runout, and the like. When reproduction of data becomes impracticable for reasons of meandering of a track, or the like, in the middle of reproduction of data, the rotational speed is decreased, and a retry is performed. However, when reproduction of data becomes impracticable for reasons of flaws or stains, the rotational speed is reversely increased, and a retry is performed.

Abstract: In a disk device, a case includes a base frame and a top panel, which are made of thin metal plates. In the top panel, a corrugated section is formed to increase its rigidity. The corrugated section has peaks and valleys that are alternately arranged. The peaks and valleys extend in a direction orthogonal to a disk loading direction to the vicinity of both side ends of the top panel.

Abstract: A disc device has a plurality of arms configured to support the outer rim of a disc carryable. Automatic loading is applied such that the disc inserted can be carried in the device, and the disc housed inside the device can be carried out of the device. A pair of shutter pieces are located on the central portion of a slot in a front bezel to be used to insert the disc therethrough and are spaced at a certain interval. The shutter piece rotates about one end thereof to raise/tumble the other end thereof. The tumbled shutter piece changes to the raised state after the disc is housed in the device while the shutter piece changes to the tumbled state before the disc housed inside the device is carried out of the device.

Abstract: A printer comprises a transfer assembly 56 for transferring a print image formed on an intermediate transfer sheet 42 to a print surface of a print medium 100, a print tray 12 on which the print medium 100 is placed, and a retaining roller 70 installed slightly downstream of the transfer assembly 56. The retaining roller 70 which is biased downward pushes the print medium 100 from above, to thereby prevent the print medium 100 from being lifted up.

Abstract: In a disc processing apparatus capable of automatically carrying out processing work such as recording information on a plurality of optical discs and printing label surfaces on those optical discs, this disc processing apparatus is able to suppress by separating a conveyed optical disc from an optical disc located just under the conveyed optical disc the occurrence of a phenomenon in which a plurality of optical discs is simultaneously conveyed in the state in which they stuck together when a plurality of optical discs accommodated within a stacker in the stacked state stuck together. After a disc contact portion 17c of a disc holding mechanism C1 was brought in contact with an optical disc D, the disc holding mechanism C1 is lowered by a predetermined amount to urge the disc contact portion 17c to downwardly press the optical disc D to thereby apply force directed in the direction substantially perpendicular to the disc surface to the optical disc D.

Abstract: To eject an optical disk forcibly from a disk device by a manual operation, an operation pin is inserted into an emergency hole of a front bezel. Then, the operation pin causes first and second ejection levers to move rearward to push a first transmission gear down to a disengaged position. When the first transmission gear is pushed down to the disengaged position, a loading slider begins to move forward according to a biasing force of a coil spring, feeding the disk outward. After moving a distance forward, the loading slider is stopped against a receiving portion of a first ejection lever, thereby to stop the disk at a half-eject position where the disk slightly protrudes from the bezel. Thereafter, when the operation pin is pulled out, the loading slider moves forward along with the pull-out movement of the operation pin, and the disk is fed out to a full-eject position.