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:
Jul. 10, 2012
Filed:
Sep. 13, 2010
Applicants:
Chien-yang Chen, Taipei, TW;
Po-kun Hsieh, Taoyuan County, TW;
Tung-hsin Lan, Taipei, TW;
Ming-chang Lin, Tainan County, TW;
Inventors:
Chien-Yang Chen, Taipei, TW;
Po-Kun Hsieh, Taoyuan County, TW;
Tung-Hsin Lan, Taipei, TW;
Ming-Chang Lin, Tainan County, TW;
Assignee:
Chunghwa Picture Tubes, Ltd., Bade, Taoyuan, TW;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H05B 41/16 (2006.01);
U.S. Cl.
CPC ...
Abstract
A power supply unit provides a voltage, and a driving current to a series of light emitting diodes. A dimming unit adjusts a duty cycle of an original dimming signal to generate a dimming signal according to the driving current and an ideal current. A current sink coupled to the series of light emitting diodes adjusts a duty cycle of the driving current according to the dimming signal.