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. 05, 2011
Filed:
Apr. 25, 2006
Applicant:
Takashi Kurumisawa, Nagano-ken, JP;
Inventor:
Takashi Kurumisawa, Nagano-ken, JP;
Assignee:
Epson Imaging Devices Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H05B 37/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
An LED driving circuit for driving a plurality of different LEDs includes: a first power supply circuit that is supplied with an input voltage for generating a plurality of driving voltages and a reference voltage with respect to the input voltage and generates a first output voltage and a second output voltage from the input voltage, on the basis of a first control signal; and a second power supply circuit that is supplied with the first output voltage, the second output voltage, and the reference voltage, selects a voltage for driving the LEDs, on the basis of a second control signal, and outputs them.