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:
Apr. 18, 2006
Filed:
Jun. 14, 2002
Chih-chung Wu, Tainan, TW;
Kuo-ding Shin, Hsinchu, TW;
Chao-lin Su, Tainan, TW;
Kai-wen Cheng, Ilan, TW;
Chih-Chung Wu, Tainan, TW;
Kuo-Ding Shin, Hsinchu, TW;
Chao-Lin Su, Tainan, TW;
Kai-Wen Cheng, Ilan, TW;
Industrial Technology Research Institute, Hsinchu, TW;
Abstract
The invention provides a method for adjusting a speed-detection device for an object lens in an optical pickup head. The invention provides an adjusted optical disc drive, wherein the optical pickup head is accelerated/decelerated and the speed-detection device outputs a standard signal level. Next, the optical pickup head of an unadjusted optical disc drive is accelerated/decelerated under the same condition, and the speed-detection device outputs a speed signal level. Finally, the gain of a programmable gain amplifier is adjusted until the speed signal is equal to the standard signal.