Optical disk device for reproducing address information from wob

Details Optical disk device for reproducing address information from wob Optical disk device for reproducing address information from wob

1996-04-25

1997-12-09

Tran, Thang V.

Dynamic information storage or retrieval

Information location or remote operator actuated control

Selective addressing of storage medium

369 47, 369 54, G11B 7085

Patent

active

056967420

ABSTRACT:
A light sensor is divided into two light receiving sections which receive light reflected by an optical disk. A first intermediate address signal is generated from a difference signal of outputs of the light receiving sections. A second intermediate address signal is generated from a sum signal of outputs of the light receiving sections. An address generating circuit generates an address signal by using the first and second intermediate address signals. An optical disk device stably generating an address signal regardless of a displacement of an objective lens and a change in reflectance of the optical disk is thus provided.

REFERENCES:
patent: 4375088 (1983-02-01), De Hoan et al.
patent: 5121375 (1992-06-01), Kuribayashi
patent: 5185732 (1993-02-01), Ogawa et al.
patent: 5339302 (1994-08-01), Takahashi et al.
patent: 5615185 (1997-03-01), Horikiri

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