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:
Feb. 23, 2010
Filed:
Aug. 07, 2008
Chien-yang Chen, Taipei, TW;
Chi-hsiu Lin, Yun-Lin Hsien, TW;
Shin-chang Lin, Taipei Hsien, TW;
Po-kun Hsieh, Taoyuan County, TW;
Chien-Yang Chen, Taipei, TW;
Chi-Hsiu Lin, Yun-Lin Hsien, TW;
Shin-Chang Lin, Taipei Hsien, TW;
Po-Kun Hsieh, Taoyuan County, TW;
Chunghwa Picture Tubes, Ltd., Taipei, TW;
Abstract
A light source driving circuit includes a voltage signal source and a temperature-improving current source for adjusting luminance of a series of LEDs. A first end of the series of LEDs is electrically connected to a ground end. The temperature-improving current source includes an adjustable power supply for outputting an adjustable voltage, a voltage-controlled current source for outputting currents according to the voltage signal source, and a feedback circuit electrically connected between a second end of the series of the LEDs and the adjustable power supply for controlling the output voltage of the adjustable power supply according to the voltage on the second end of the series of LEDs.