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:
Jul. 01, 2003
Filed:
Dec. 05, 2001
Applicant:
Inventors:
Young-Kee Min, Elm Grove, WI (US);
Bernd Clauberg, Schaumburg, IL (US);
Bertrand J. E. Hontelé, Dalfsenlaan, NL;
Assignee:
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H05B 4/114 ; H02M 3/335 ;
U.S. Cl.
CPC ...
H05B 4/114 ; H02M 3/335 ;
Abstract
The driver circuit for light emitting diodes (LEDs) of the present invention provides power to LEDs using pulse width modulation (PWM). The driver circuit uses current feedback to adjust power to LED arrays and provides a full light and a dim mode.
Published as:
US2003102819A1; WO03049505A1; AU2002348912A1; US6586890B2; EP1459599A1; CN1600047A; JP2005512334A; EP1459599B1; ATE387832T1; DE60225333D1; CN100446629C; DE60225333T2; JP4353804B2; EP1459599B2; DE60225333T3;