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. 04, 2014
Filed:
Jul. 24, 2012
Tiesheng Yan, Chengdu, CN;
Youling LI, Shenzhen, CN;
Feng Lin, Chengdu, CN;
Xinhe Su, Chengdu, CN;
Ching-chuan Kuo, Taipei, TW;
Tiesheng Yan, Chengdu, CN;
Youling Li, Shenzhen, CN;
Feng Lin, Chengdu, CN;
Xinhe Su, Chengdu, CN;
Ching-Chuan Kuo, Taipei, TW;
O2Micro, Inc., Santa Clara, CA (US);
Abstract
A controller for controlling power to a light source includes a first sensing pin, a second sensing pin, a third sensing pin, and a driving pin. The first sensing pin receives a first signal indicating an instant current flowing through an energy storage element. The second sensing pin receives a second signal indicating an average current flowing through the energy storage element. The third sensing pin receives a third signal indicating whether the instant current decreases to a predetermined current level. The driving pin provides a driving signal to a switch to control an average current flowing through the light source to a target current level. The driving signal is generated based on one or more signals selected from the first signal, the second signal and the third signal.