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CD apparatus and interference learing method thereof

A technology of optical discs and equipment, applied in the field of interference learning, can solve the problems of interference information learning process, small interference value, and inability to fully learn

Inactive Publication Date: 2004-02-18
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, in these disturbance learning processes, there is a problem that the disturbance value is small compared with the control gain, and it is impossible to sufficiently learn
In addition, for recorded type discs, the noise value is also affected by the difference in reflectivity between recorded and unrecorded areas
Therefore, there is a problem of not being able to perform a learning process that accurately interferes with information

Method used

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  • CD apparatus and interference learing method thereof
  • CD apparatus and interference learing method thereof
  • CD apparatus and interference learing method thereof

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Embodiment Construction

[0038] Preferred embodiments of the optical disc apparatus according to the present invention will be described in detail below with reference to the accompanying drawings.

[0039]

[0040] The configuration of the optical disc device according to the first embodiment of the present invention will be described below. FIG. 1 is a block diagram showing a configuration example of an optical disc device according to a first embodiment of the present invention. FIG. 2 is a block diagram showing another configuration example of the optical disc device according to the first embodiment of the present invention. Fig. 3 is a graph showing the relationship between the objective lens of the optical head and the optical disc. FIG. 4 is a configuration diagram of an optical system of an optical head. Figure 5 is a block diagram showing another configuration example of the optical disc device according to the first embodiment of the present invention.

[0041] The optical disc "d" to ...

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Abstract

An optical disk device comprises position control portions (15, 20, 21, 22, 23) which carry out position control of at least one of an optical head and an objective lens based on a detection signal from the optical head (10), and disturbance learning portions (18, 19, 20) which reduce a compensation gain of the position control portion in a range in which servo control is not deviated, and detect disturbance information of the optical disk to store it as learning disturbance information. Fine disturbance information can be reliably learned because the information is not affected by the compensation gain.

Description

technical field [0001] The present invention relates to an optical disc device for learning disturbances of an optical disc. More particularly, the present invention relates to an optical disc device and a disturbance learning method of the optical disc device for performing reliable disturbance learning by reducing a servo gain during learning. Background technique [0002] Recently, optical disc devices such as DVD (Digital Versatile Disc) have been developed and known. In such an optical disc device, there is a need to more significantly improve operational reliability. [0003] As an example of such an optical disc device, in Japanese Patent Application Laid-Open Publication Nos. 8-77589 and 9-50303, an optical disc device having a stabilization control system for acquiring an error signal one period before and a current The correlation between the error signals, when the correlation is strong, the gain of the control system is increased, or, when the correlation is we...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B21/08G11B7/00G11B7/085G11B7/09G11B7/095G11B21/10
CPCG11B7/0948G11B7/0941G11B7/0946
Inventor 米澤実
Owner KK TOSHIBA
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