Patent · US Expired

Circuit arrangement for the operation of a light source for the optical scanning of recording media

US5264692A · kind A · utility

2Cited by

6References

18Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Helmut Schmid · Freudenstadt, DE
Andreas Rosinger · Hannover, DE
Gunter Notzel · Hildesheim, DE

Key dates

Filing date	Apr 27, 1992
Grant date	Nov 23, 1993
Priority date	—
Expiry date	Apr 27, 2012

Classification

Technology area (CPC G)Physics
CPC primaryG11B7/126
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

In a circuit arrangement for the operation of a light source for the optical scanning of recording media, in particular so-called compact discs, from an information signal obtained by the scanning a signal (quality signal) is derived which describes the quality of the information signal. The power of the light source is controlled in dependence on the quality signal with the aim of maximising quality.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.