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:
Aug. 05, 2003
Filed:
Oct. 16, 2001
Applicant:
Inventors:
Tai-Shan Liao, Hsinchu, TW;
Ming-Li Chen, Hsinchu, TW;
Ming Hung Huang, Hsinchu, TW;
Ho-Lin Tsay, Hsinchu, TW;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03K 1/760 ; H01J 1/60 ; G08B 5/00 ; G09G 3/32 ;
U.S. Cl.
CPC ...
H03K 1/760 ; H01J 1/60 ; G08B 5/00 ; G09G 3/32 ;
Abstract
A light emitting element driver composed of two transistors, one ground resistor, one inductance and a single capacitor is arranged to drive an LED with a supplied voltage as low as about 0.92 V. The transistors include an NPN transistor and a PNP transistor, the base of the PNP transistor being connected to the ground resistor and the base of the NPN transistor being connected to the collector of the PNP transistor, with the capacitor being connected between the base of the PNP transistor and the node connecting the collector of the NPN transistor to the inductance and to the LED.