The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 03, 2003
Filed:
Nov. 08, 2001
Jak-heun Yang, Gyeonggi-do, KR;
Samsung Electrics Co. LTD, Suwon, KR;
Abstract
An optical disc player, and more particularly, an apparatus controlling a mirror signal independently of variations of the quantity of light in a laser received by a pickup or the reflectivity of a disc, and a method thereof. The apparatus includes an envelope detector detecting an envelope of a signal which is reflected from an optical disc, a center voltage outputting unit outputting a center voltage of the envelope, a comparator outputting the optimum mirror signal by comparing the envelope with the center voltage using a predetermined mirror controlling signal and a mirror signal controller outputting a predetermined mirror controlling signal to the comparator, until the mirror signal output from the comparator reaches a predetermined level compared to a fixed mirror signal. Further, a mirror signal output from the comparator is used as an offset signal for the subsequent mirror signal and thus a regular mirror signal can be output independently of variations of the quantity of light in a laser received by a pickup or the reflectivity of a disc. As a result, the mirror signal can be correctly incident on a target point when a track of a disc is jumped.