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:
Jun. 05, 2012
Filed:
Jun. 24, 2009
Po-yen Chen, Taipei, TW;
Yeu-torng Yau, Tainan, TW;
Hung-chun LI, Taoyuan County, TW;
Li-ling Lee, Hsinchu County, TW;
Ming-che Yang, Taichung County, TW;
Po-Yen Chen, Taipei, TW;
Yeu-Torng Yau, Tainan, TW;
Hung-Chun Li, Taoyuan County, TW;
Li-Ling Lee, Hsinchu County, TW;
Ming-Che Yang, Taichung County, TW;
Industrial Technology Research Institute, Hsinchu, TW;
Abstract
An light emitting diode (LED) control, a plurality of duty cycle signals corresponding to a plurality of LEDs are stored in a dual-port memory by memory mapping. By sampling, the stored duty cycle signals are outputted to generate a plurality of parallel single-bit data each having one single bit. After the single-bit data are converted by a data transmission module, each bit of the single-bit data is serially outputted to a drive module to drive the LEDs. Thus, the ON duty cycles of the LEDs are modulated by pulse width modulation (PWM), light emitted from the LEDs are mixed in time-domain, and the brightness of the LEDs can be controlled.