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. 15, 2012
Filed:
Oct. 15, 2009
Chih-hao Yang, Tainan, TW;
Fu-yuan Shih, Danshuei Township, Taipei County, TW;
An-tung Chen, Pingzhen, TW;
Shui-mu Lin, Taichung, TW;
Chih-Hao Yang, Tainan, TW;
Fu-Yuan Shih, Danshuei Township, Taipei County, TW;
An-Tung Chen, Pingzhen, TW;
Shui-Mu Lin, Taichung, TW;
Richtek Technology Corporation, R.O.C., Hsin-Chu, TW;
Abstract
The present invention discloses a circuit and a method for controlling a light emitting device, and an integrated circuit therefore. The circuit for controlling a light emitting device comprises: a power stage controller circuit controlling a power stage circuit to convert an input voltage to an output voltage, which is supplied to at least one light emitting device channel including at least one light emitting device; a transistor switch in the light emitting device channel; and a current source circuit controlling a current through the light emitting device channel, wherein the power stage controller circuit and the current source circuit are integrated in an integrated circuit which provides a control voltage to control a gate of the transistor switch.