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. 07, 2015
Filed:
Mar. 15, 2013
Applicant:
Trw Automotive U.s. Llc, Livonia, MI (US);
Inventors:
Jeffrey L. Kulczycki, Plymouth, MI (US);
Nicholas W. Howell, Dearborn Heights, MI (US);
Stephen B. White, Minnesota City, MN (US);
Gerard Zettler, Winona, MN (US);
Kevin L. Medin, Lewiston, MN (US);
Assignee:
TRW AUTOMOTIVE U.S. LLC, Livonia, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05B 37/02 (2006.01); H05B 39/02 (2006.01); H05B 39/04 (2006.01); H05B 33/08 (2006.01);
U.S. Cl.
CPC ...
H05B 33/0845 (2013.01); H05B 33/0854 (2013.01);
Abstract
A method and apparatus for generating a pulse width modulated voltage that has a duty cycle that is inversely proportional to a sensed battery voltage and using the generated pulse width modulated voltage to control a light emitting diode to maintain the intensity of light emitted as the battery voltage fluctuates.