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:
Mar. 18, 2003
Filed:
Jan. 09, 2002
Applicant:
Inventors:
Hsien Jen Li, Chang Hua County, TW;
Chih Jung Yu, Yi Lan County, TW;
Assignee:
Delta Optoelectronics, Inc., Hsin-Chu, TW;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H05B 4/116 ;
U.S. Cl.
CPC ...
H05B 4/116 ;
Abstract
A method for driving a cold cathode flat fluorescent lamp (CCFFL). The method comprises the steps of generating a pulse-combined signal, applying the pulse-combined signal to an inverter driver circuit which is electrically connected to the CCFFL and causes it to light up, and adjusting the pulse width and the pulse period so that the CCFFL is at a maximum luminance while a luminance uniformity thereof is maximum. Based on the pulse width and the pulse period, the luminance uniformity of the CCFFL is constant while the CCFFL is adjusted for a desired luminance.