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:
Nov. 16, 2010
Filed:
Aug. 27, 2004
Applicant:
Robert L. Lyle, Jr., Raleigh, NC (US);
Inventor:
Robert L. Lyle, Jr., Raleigh, NC (US);
Assignee:
Intersil Americas Inc., Milpitas, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02M 3/335 (2006.01); H02M 5/42 (2006.01);
U.S. Cl.
CPC ...
Abstract
An AC power supply system modulates a high frequency switching signal with a pulse width modulation (PWM) signal to produce a composite signal. The duty cycle of the PWM component of the composite signal is used to control the brightness of a cold cathode fluorescent lamp for backlighting a liquid crystal display.