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Patent Searching and Data


Title:
BACKLIGHT DRIVING CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2019/024134
Kind Code:
A1
Abstract:
A backlight driving circuit, comprising: an input unit (210); a transformer (T) which comprises: a first primary winding (P) electrically connected to an output end of the input unit (210), a first secondary winding (S1) coupled to the first primary winding (P), and a first auxiliary winding (S2) coupled to the first secondary winding (S1); a voltage output unit (220); and a control driving unit (230). The transformer (T) further comprises a second auxiliary winding unit which is coupled to the first secondary winding (S1) and electrically connected to the control driving unit (230), the output voltage of the first auxiliary winding (S2) is lower than that of the second auxiliary winding unit, and the first auxiliary winding (S2) and the second auxiliary winding unit are jointly connected to a voltage control end of the control driving unit (230). Said backlight driving circuit has an advantage that the output voltage range of the voltage output unit (220) can be increased.

Inventors:
CAO, Dan (No.9-2 Tangming Rd, Guangming New DistrictShenzhen, Guangdong 2, 518132, CN)
Application Number:
CN2017/097872
Publication Date:
February 07, 2019
Filing Date:
August 17, 2017
Export Citation:
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Assignee:
SHENZHEN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD. (No.9-2 Tangming Rd, Guangming New DistrictShenzhen, Guangdong 2, 518132, CN)
International Classes:
H02M5/12
Foreign References:
CN102421226A2012-04-18
CN102420529A2012-04-18
CN104575401A2015-04-29
CN104009638A2014-08-27
CN204304785U2015-04-29
US6359795B12002-03-19
Attorney, Agent or Firm:
SCIHEAD IP LAW FIRM (Room 1508, Huihua Commercial&Trade BuildingNo. 80 XianLie Zhong Road, Yuexiu Distric, Guangzhou Guangdong 0, 510070, CN)
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