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:
Sep. 24, 2013
Filed:
Mar. 08, 2011
Hung-ching Lee, Hsin-Chu, TW;
Ching-chou Yu, Hsin-Chu, TW;
Sheng-kai Hsu, Hsin-Chu, TW;
Dang-ko Wang, Hsin-Chu, TW;
Hung-Ching Lee, Hsin-Chu, TW;
Ching-Chou Yu, Hsin-Chu, TW;
Sheng-Kai Hsu, Hsin-Chu, TW;
Dang-Ko Wang, Hsin-Chu, TW;
Au Optronics Corp., Hsinchu, TW;
Abstract
A LED driving method includes steps of: providing a first pulse width modulation (PWM) signal for determining a brightness of a LED; obtaining a duty cycle of the first PWM signal; and selectively enabling the LED to work with a PWM dimming mode or a direct current (DC) dimming mode according to a relative relationship between a magnitude of the obtained duty cycle and a preset threshold value. Since the LED is performed with a two stage brightness control by use of mixed dimming mode, the driving efficiency of the LED can be improved.