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:
May. 12, 2015
Filed:
Jun. 09, 2009
Chih-ching Yu, Tao-Yuan Hsien, TW;
Hung-hsiang Chang, Hsinchu County, TW;
Ping-tsai Tsai, Kaohsiung, TW;
Chih-Ching Yu, Tao-Yuan Hsien, TW;
Hung-Hsiang Chang, Hsinchu County, TW;
Ping-Tsai Tsai, Kaohsiung, TW;
Mediatek Inc., Hsin-Chu, TW;
Abstract
The invention relates to recording on a medium, and in particular, to laser control during recording data on an optical medium. A laser control method for dynamically adjusting laser power during recording data onto an optical disc comprises: recording normal data onto the optical disc according to an initial laser power; stopping recording when a trigger is generated; reading back the recorded normal data and generating a first recording quality index; recording a test pattern at a test pattern starting point according to a selected laser power; reading back the test pattern and generating a second recording quality index; and determining an adaptive laser power to continually record the normal data according to the first recording quality index and the second recording quality index.