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. 20, 2010
Filed:
Mar. 13, 2008
Shwang-shi Bai, Tainan County, TW;
Hsiu-na Hsieh, Tainan County, TW;
Shu-ming Chang, Tainan County, TW;
Shwang-Shi Bai, Tainan County, TW;
Hsiu-Na Hsieh, Tainan County, TW;
Shu-Ming Chang, Tainan County, TW;
Himax Technologies Limited, Tainan County, TW;
Abstract
A backlight module and a current providing circuit thereof are provided. The current providing circuit includes a signal generating unit, a switching unit, a first capacitor, a transformer and an output node. The signal generating unit generates a PWM signal according to a level of a power source. The switching unit determines whether a first signal end and a second signal end of the switching unit are conducted according to the PWM signal received by a control end of the switching unit. Following a switch performed by the switching unit, the first capacitor charges and discharges through a current path provided by a primary coil of the transformer. Thereby, a secondary coil of the transformer generates a corresponding AC voltage by sensing a current change in the primary coil and outputs the AC voltage through the output node.