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:
Dec. 16, 2008
Filed:
Oct. 12, 2006
Hui-chiang Yang, Hsintien, TW;
Hui-Chiang Yang, Hsintien, TW;
Niko Semiconductor Co., Ltd., Taipei, TW;
Abstract
A half-bridge CCFL driving apparatus uses a bridge rectifier to convert AC into a DC voltage and stores the DC voltage in a capacitor unit. The capacitor unit averages the DC voltage into two voltages that are equal for outputting. Then, the primary winding of the transformer is connected with the capacitor unit via a half-bridge switch to obtain the two equal voltages. The secondary winding of the transformer is connected with at least one harmonic capacitor. The PWM controller driving the half-bridge switch via an isolated driving element by turns means to transmit the two equal voltage outputted from the capacitor unit to the primary winding of the transformer by turns. Then, the serial leakage inductance produced at the secondary winding of the transformer works with the harmonic capacitors to generate a continuous sine-wave voltage that is supplied to the CCFL.