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EP0312105A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Optical disk player

Assignee: Sony Corp
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Filing: 1988-10-14
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Granted: —
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Expires: 2008-10-14
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Abstract

Abstract An optical disk player for reproducing information stored on various types of optical disks, such as video disks and compact disks having diameters different from that of the video disk, for recording audio signals and for recording audio and video signals, wherein a skew sensor (41) detects an inclination of an optical disk (1a, 1b, 1c) relative to an optical pickup (40), a skew servo mechanism (47, 47′) controls the inclination of the optical pickup (40), relative to the optical disk on the basis of the detected inclination, a disk size detector (45) detects the size of the disks, a disk detector detects signals, recorded in audio and audio/video compact disks indicative of the type of optical disk, and on the basis of the detected outputs from the size detector (45) and the disk detector, the skew servo (47, 47′) is effected continously from the innermost track to outermost track or slightly before the outermost track when the disk is a video disk or audio/video compact disk, but wherein the skew servo is stopped at a predetermined position inwardly of the outermost track when the disk is an audio compact disk.

Inventors

  • 👤 Keiji Maruta
  • 👤 Masanobu Nishikata

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-09 06:19
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/08; G11B7/09; G11B7/095; G11B19/00; G11B19/02; G11B19/04; G11B7/0956

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 219 words
An optical disk player capable of reading information stored on a video disk, on an audio compact disk having a diameter different from said video disk, and on a video and audio compact disk, wherein both the audio compact disk and the video and audio compact disk have lead-in tracks (T) storing identification signals for identifying the type of compact disk (1a, 1b, 1c), said disk player being characterized by an optical pickup (40) for reading stored information from a disk; means (45) for detecting the size of the disk; means for detecting the identification signal from the lead-in tracks of the disk; a skew sensor (41) for detecting an inclination angle of skew of the disk relative to said optical pickup; means (47′) for adjusting said inclination of the disk relative to said optical pickup; skew servo means (47) for supplying a skew signal to said means (47′) for adjusting upon detection of an inclination by said skew sensor (41), said skew signal being held at its value obtained when said optical pickup (40) is at a predetermined radial track location on the disk when said means (45) for detecting the size detects that the disk size is a compact disk and said means for detecting the identification signal detects that the disk is an audio compact disk.
Claim 2
Dependent Claim 219 words
An optical disk player capable of reading information stored on a video disk, on an audio compact disk having a diameter different from said video disk, and on a video and audio compact disk, wherein both the audio compact disk and the video and audio compact disk have lead-in tracks (T) storing identification signals for identifying the type of compact disk (1a, 1b, 1c), said disk player being characterized by an optical pickup (40) for reading stored information from a disk; means (45) for detecting the size of the disk; means for detecting the identification signal from the lead-in tracks of the disk; a skew sensor (41) for detecting an inclination angle of skew of the disk relative to said optical pickup; means (47′) for adjusting said inclination of the disk relative to said optical pickup; skew servo means (47) for supplying a skew signal to said means (47′) for adjusting upon detection of an inclination by said skew sensor (41), said skew signal being held at its value obtained when said optical pickup (40) is at a predetermined radial track location on the disk when said means (45) for detecting the size detects that the disk size is a compact disk and said means for detecting the identification signal detects that the disk is an audio compact disk.
Claim 3
Dependent Claim 21 words
An optical disk player according to claim 1, characterized in that said means (47′) for adjusting comprises a skew motor (26).
Claim 4
Dependent Claim 22 words
An optical disk player according to claim 2, characterized in that said skew motor (26) is held by holding said skew signal.
Claim 5
Dependent Claim 33 words
An optical disk player according to any one of claims 1 to 3, characterized in that said predetermined location is at approximately 35 mm from the center of the disk (1a, 1b, 1c).
Claim 6
Dependent Claim 29 words
An optical disk player according to any one of claims 1 to 4, characterized in that the disk is a CD (1c) having a radius of about 40 mm.
Claim 7
Dependent Claim 29 words
An optical disk player according to any one of claims 1 to 4, characterized in that the disk (1b) is a CD having a radius of about 60 mm.

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