Optical disc drive apparatus, camera apparatus, and method for controlling tilt of light beam in accordance with skew in optical disc

By using an angular velocity sensor in the optical disc drive device to detect disc skew and perform high-precision tilt control, the problem of insufficient tilt correction accuracy when the rotating optical disc is skewed in the prior art is solved, achieving stable irradiation of the light beam and improving the quality of recording and reproduction.

Inactive Publication Date: 2009-04-01
SONY GROUP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when an external force is applied for some reason, the disc may be skewed
If the amount of skew exceeds a predetermined allowable amount, it is difficult to achieve accurate irradiation of the light beam, resulting in interruption of recording and reproduction

Method used

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Embodiment Construction

[0039] The present invention is applicable to devices such as fixed optical disc reproducing devices and optical disc recording / reproducing devices. In particular, the present invention is suitable for use in portable devices frequently subjected to external forces due to rotation during shooting (or reproduction), such as video camera devices including optical disc drive devices.

[0040] Embodiments of the present invention will now be described by taking a portable video camera device as an example with reference to the accompanying drawings.

[0041] overall structure

[0042] FIG. 1 is a schematic block diagram of a video camera device according to an embodiment of the present invention.

[0043] The video camera device 1 shown in FIG. 1 is removably loaded with an optical disc 2 as a data recording medium, such as Digital Versatile Disc / Rewritable Disc (DVD-R / RW), Blu-ray Disc (Blu-ray Disc). Disc) (registered trademark), etc., which have a disc shape with a diameter o...

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Abstract

An optical disc drive apparatus includes a rotatably supporting drive unit supporting an optical disc, an optical pickup, an angular velocity sensor detecting the magnitude and direction of an angular velocity, a skew estimating section estimating disc skew from the result of detection by the angular velocity sensor, such that one estimated skew value in a case where the angular velocity is applied in a direction in which the optical disc moves away from the optical pickup differs from another estimated skew value in a case where the angular velocity of the same magnitude but in the opposite direction, in which the optical disc approaches the optical pickup, is applied, and a tilt drive section changing the tilt of the light beam in accordance with the estimated skew value and correcting a shift, occurring because of the angular velocity, in a light beam applying position on the optical disc.

Description

[0001] Cross References to Related Applications [0002] The present invention contains subject matter related to Japanese Patent Application JP 2007-256511 filed in the Japan Patent Office on Sep. 28, 2007, the entire content of which is hereby incorporated by reference. technical field [0003] The present invention relates to an optical disc drive device and a camera device capable of controlling a tilt of a light beam according to a skew occurring on an optical disc by using an angular velocity sensor configured to detect an angular velocity of a rotating optical disc. The present invention also relates to a method for controlling a beam tilt according to a skew occurring on an optical disc by using an angular velocity sensor. Background technique [0004] An optical disk drive device performs recording and reproduction of information in which a light beam (LB) emitted from an optical pickup is irradiated onto the optical disk while the optical disk is rotating at a high...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): G11B7/095G11B31/00H04N5/225
CPCG11B7/0956
OwnerSONY GROUP CORP