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. 18, 2010
Filed:
Jan. 31, 2008
Yueh-han LI, Hsin-Chu, TW;
Po-tang Hsu, Hsin-Chu, TW;
Chien-ming Ko, Hsin-Chu, TW;
Hung-ching LI, Hsin-Chu, TW;
Yueh-Han Li, Hsin-Chu, TW;
Po-Tang Hsu, Hsin-Chu, TW;
Chien-Ming Ko, Hsin-Chu, TW;
Hung-Ching Li, Hsin-Chu, TW;
AU Optronics Corp., Hsin-Chu, TW;
Abstract
When temperature variation occurs to the LED dice of an LED lighting system, a feedback control mechanism is applied to compensate temperature-related wavelength shift for precisely controlling the light generated by the LED dice based on the voltage drop variation or current variation of the LED dice. The color control method for the LED lighting system includes a preliminary detection phase and a feedback control phase. In the preliminary detection phase, voltage drop signals or current signals together with corresponding color and hue signals of each LED module of the LED lighting system are detected. In the feedback control phase, signal compensating processes are performed to precisely control the light generated by the LED lighting system based on the voltage drop variation or the current variation in conjunction with the corresponding color and hue signals generated in the preliminary detection phase.