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. 17, 2007
Filed:
Nov. 22, 2004
Yih-wey Tang, Taipei, TW;
Yung-hsin Chiang, Taipei Hsien, TW;
Yih-Wey Tang, Taipei, TW;
Yung-Hsin Chiang, Taipei Hsien, TW;
ADDtek Corp., Taipei, TW;
Abstract
An integrated circuit includes a light emitting device and a light emitting device driver coupled to the light emitting device. The light emitting device driver is for generating a drive signal to drive the light emitting device to emit light. A light emitting device driver includes a transistor having a first terminal coupled to a light emitting device; a resistor having a first terminal coupled to a second terminal of the transistor, and a second terminal coupled to a supply node; and a comparator having a first input terminal coupled to a reference voltage, a second input terminal coupled to the second terminal of the transistor, and an output terminal coupled to a control terminal of the transistor. The light emitting device driver controls an electrical current flowing through the transistor for driving the light emitting device to emit light.