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Disc driving device

A disk drive device and a technology for correcting disks, which can be applied to the configuration/installation of heads, instruments, optical recording media, etc., and can solve the problems of increasing device costs, etc.

Inactive Publication Date: 2004-03-24
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, even for this method, it is necessary to add a new structure to the existing signal detection system, so it is inevitable to increase the cost of the device

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Hereinafter, the present invention will be specifically described based on the drawings showing the embodiments. Since the parts with the same symbols as those in the conventional example are basically the same parts as those in the disk drive device shown in FIG. 17, detailed description thereof will be omitted.

[0054] FIG. 1 is a block diagram showing a disk drive device as Embodiment 1 of the present invention. In this figure, 10 is an optical disc, 11 is a semiconductor laser as a light source, 12 is a collimator lens, 13 is a beam splitter, 14 is an objective lens, 15 is a photodetector, 16 is a transmission mechanism, 17 is a differential amplifier, 18 19 is a playback difference signal processing section, 20 is a polarity control section, 21 is a polarity inversion section, 22 is a tracking control section, 23 is an adding amplifier, and 25 is a playback signal processing section. 26 is a polarity information reproducing part, 27 is an address reproducing part...

Embodiment 2

[0083] Fig. 8 is a block diagram showing a disk drive device according to Embodiment 2 of the present invention. In this figure, 10 is an optical disc, 11 is a semiconductor laser as a light source, 12 is a collimator lens, 13 is a beam splitter, 14 is an objective lens, 15 is a photodetector, 16 is a transmission mechanism, 17 is a differential amplifier, 18 19 is a playback difference signal processing section, 20 is a polarity control section, 21 is a polarity inversion section, 22 is a tracking control section, 23 is an adding amplifier, and 25 is a playback signal processing section. 26 is a polarity information reproducing part, 27 is an address reproducing part, 28 is an information reproducing part, 30 is a traverse control part, 31 is a traverse motor, 32 is a recording signal processing part, 33 is a semiconductor laser drive part, 34 is a transmission mechanism driving part, which has the same or equivalent functions as those described in the conventional example or...

Embodiment 3

[0106] Fig. 14 is a diagram showing a disk drive device according to Embodiment 3 of the present invention. In the figure, 10 is an optical disc, 11 is a semiconductor laser as a light source, 12 is a collimator lens, 13 is a beam splitter, 14 is an objective lens, 15 is a photodetector, 16 is a transmission mechanism, 17 is a differential amplifier, and 18 is a differential Signal waveform shaping part, 19 is playback difference signal processing part, 20 is polarity control part, 21 is polarity inversion part, 22 is tracking control part, 23 is adding amplifier, 25 is playback signal processing part, 26 is Polarity information playback section, 27 is address playback section, 28 is information playback section, 30 is traverse control section, 31 is traverse motor, 32 is recording signal processing section, 33 is semiconductor laser drive section, 34 is The driving parts of the transmission mechanism have the same or equivalent functions as those described in the conventional...

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PUM

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Abstract

A disk device capable of correcting only the tilt between a disk and a light beam which is to be irradiated from a head at a low cost is obtained. The disk includes a first identification information area and a second identification information area. The disk device is provided with means obtaining the sum signal of the outputs of a photodetector when the light spot passes the first identification information area and the outputs of the detector when the light spot passes the second identification information area and tilt control means controlling the relative tilt between the disk and the head so that an index approaches the extremun while using the obtained sum signal as the index.

Description

technical field [0001] The present invention relates to a disk drive device having a function of correcting the degree of inclination between an optical disk as a recording medium and an optical head that emits a light beam. Background technique [0002] In recent years, there has been a demand for a medium capable of storing information such as image information or video image information, which has a larger capacity than conventional character information or audio information, and optical disks have attracted attention as a solution thereto. In conventional recordable optical discs, in order to control the light beam for recording and reproducing at the center of the track, guide grooves are engraved in advance when the disc is manufactured. The guide grooves form spiral or concentric convex (land) and concave (groove) portions on the disc. By using both the convex portion and the concave portion as the recording track (land track and groove track), twice as much informat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B7/007G11B7/09G11B7/095
CPCG11B7/00745G11B7/0938G11B7/0956G11B7/09
Inventor 岛元昌美中根和彦
Owner MITSUBISHI ELECTRIC CORP