Title:
BACKLIGHT CONSTANT-CURRENT CONTROL CIRCUIT AND BACKLIGHT STRUCTURE
Document Type and Number:
WIPO Patent Application WO/2022/077719
Kind Code:
A1
Abstract:
A backlight constant-current control circuit (1) and a backlight structure (13). The backlight constant-current control circuit comprises a light-emitting module (2) and a constant-current control module (3), wherein the constant-current control module (3) comprises a feedback unit (5) connected to an output end of the light-emitting module (2), and a voltage regulation unit (4) connected to an input end of the light-emitting module (2); when the working current of the light-emitting module (2) deviates from a pre-set current, the feedback unit (5) outputs a voltage regulation signal to the voltage regulation unit (4); and the voltage regulation unit (4) regulates a voltage at the input end of the light-emitting module (2) according to the voltage regulation signal, such that the working current is the pre-set current.
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Inventors:
LIU JINFENG (CN)
Application Number:
PCT/CN2020/132608
Publication Date:
April 21, 2022
Filing Date:
November 30, 2020
Export Citation:
Assignee:
TCL CHINA STAR OPTOELECTRONICS TECH CO LTD (CN)
International Classes:
G09G3/32; H05B45/325; H05B45/345
Foreign References:
| CN101764516A | 2010-06-30 | |||
| CN202738176U | 2013-02-13 | |||
| CN107909969A | 2018-04-13 | |||
| CN102682696A | 2012-09-19 | |||
| CN107945746A | 2018-04-20 | |||
| CN103177697A | 2013-06-26 | |||
| CN103440848A | 2013-12-11 | |||
| JP2011060696A | 2011-03-24 | |||
| US20070159421A1 | 2007-07-12 |
Attorney, Agent or Firm:
PURPLEVINE INTELLECTUAL PROPERTY (SHENZHEN) CO., LTD. (CN)
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