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:
Feb. 10, 2004
Filed:
Aug. 27, 2002
Applicant:
Inventors:
Lajos Burgyan, Mountain View, CA (US);
Francois Prinz, San Jose, CA (US);
Assignee:
Fairchild Semiconductor Corporation, South Portland, ME (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G05F 1/618 ; G05F 1/565 ;
U.S. Cl.
CPC ...
G05F 1/618 ; G05F 1/565 ;
Abstract
Embodiments of the invention provide for circuits for driving LEDs with consistently good illumination and superior efficiency at lower cost and suitable for use with cheaper LEDs or with LEDs having wide component parameter tolerances over wide operating voltages and temperature variations. Circuits disclosed may be, but need not be, embodied on a single semiconductor chip.