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. 13, 2010
Filed:
Jun. 05, 2007
Ming-jiou Yu, Taipei, TW;
Chih-ching Chen, Miaoli County, TW;
Chia-wei Liao, Hsinchu County, TW;
Kuo-jung Lan, Taipei County, TW;
Bing-yu Hsieh, Taipei, TW;
Shu-hung Chou, Taipei County, TW;
Kuan-hua Chao, Taipei, TW;
Jong-woei Chen, Taichung County, TW;
Ming-Jiou Yu, Taipei, TW;
Chih-Ching Chen, Miaoli County, TW;
Chia-Wei Liao, Hsinchu County, TW;
Kuo-Jung Lan, Taipei County, TW;
Bing-Yu Hsieh, Taipei, TW;
Shu-Hung Chou, Taipei County, TW;
Kuan-Hua Chao, Taipei, TW;
Jong-Woei Chen, Taichung County, TW;
Mediatek Inc., Hsin-Chu, TW;
Abstract
A method for controlling a specific output power level emitted from a laser diode (LD) in an optical pick-up head unit (OPU) is disclosed. The LD is configured to provide a plurality of output power levels for accessing/recording an optical disc. The method includes: determining a specific power control value according to a first output power level, a second output power level, a first power control value of the first output power level, and the specific output power level, wherein the first output power level is less than the specific output power level and greater than the second output power level; and driving the LD to emit the specific output power level according to the specific power control value, the first power control value, and a second power control value of the second output power level.