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:
Apr. 29, 2014
Filed:
Mar. 03, 2011
Xuecheng Jin, Palo Alto, CA (US);
Minjong Kim, San Jose, CA (US);
Enzhu Liang, Pacifica, CA (US);
John William Kesterson, San Jose, CA (US);
Xiaoyan Wang, Milpitas, CA (US);
Xuecheng Jin, Palo Alto, CA (US);
Minjong Kim, San Jose, CA (US);
Enzhu Liang, Pacifica, CA (US);
John William Kesterson, San Jose, CA (US);
Xiaoyan Wang, Milpitas, CA (US);
Dialog Semiconductor Inc., Campbell, CA (US);
Abstract
A system that provides an intelligent approach to driving multiple strings of LEDs. A processing device determines an optimal current level for each LED string from a limited set of allowed currents. The processing device also determines a PWM duty cycle for driving the LEDs in each LED string to provide precise brightness control over the LED string. The settings for the current level and duty cycle are transmitted to an LED driver for regulating the current and on-off times of the LED strings. Beneficially, the system reduces the size of the LED driver while leveraging existing resources available in the processing device to operate the LEDs in a power efficient manner.