Optical recording medium driving device

Details Optical recording medium driving device Optical recording medium driving device

2007-03-27

2007-03-27

Hindi, Nabil (Department: 2627)

Dynamic information storage or retrieval

Control of storage or retrieval operation by a control...

Mechanism control by the control signal

C369S116000, C369S112020

Reexamination Certificate

active

11418254

ABSTRACT:
A method and an apparatus for driving an optical recording medium for recording and/or reproducing various information for the optical recording medium, in which the output power ratio of the light source may be reduced for recording and reproduction, for optical recording media of different sorts, or for respective recording surfaces of a multi-layered optical recording medium, so that optimum characteristics may be realized even with use of an easy-to-fabricate light source or a light source with a smaller light output rating. The intensity of a light beam emitted on an optical recording medium102by an optical head104is controlled by optical coupling efficiency varying elements214, 215depending on the sort of the optical recording medium102, recording surfaces of a multi-layered optical recording medium, recording surfaces in the multi-layered optical recording medium or on the operating modes, in such a manner that the intensity of the light beam emitted on the optical recording medium102may be significantly varied without drastically increasing the output power ratio on the side light source212.

REFERENCES:
patent: 5901131 (1999-05-01), Ootaki et al.
patent: WO 03/049096 (2003-06-01), None

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