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:
Mar. 31, 2015
Filed:
Nov. 10, 2011
Hsing-chien Yang, Hsinchu County, TW;
Wen-hsin Cheng, Hsinchu, TW;
Ying-hao Hsu, Hsinchu, TW;
Lan-ting Hsu, Hsinchu, TW;
Tsung-hau Chang, Hsinchu, TW;
Hsing-Chien Yang, Hsinchu County, TW;
Wen-Hsin Cheng, Hsinchu, TW;
Ying-Hao Hsu, Hsinchu, TW;
Lan-Ting Hsu, Hsinchu, TW;
Tsung-Hau Chang, Hsinchu, TW;
Novatek Microelectronics Corp., HsinChu, TW;
Abstract
A light-emitting diode (LED) driving circuit includes an LED control circuit and a power stage circuit. The LED control circuit shifts an input pulse width modulation (PWM) signal toward a higher frequency direction in a frequency domain to generate an output PWM signal having a duty cycle substantially the same as a duty cycle of the input PWM signal. The power stage circuit outputs an LED driving current according to the output PWM signal.