Title:
BACKLIGHT CONSTANT-CURRENT CONTROL CIRCUIT AND BACKLIGHT STRUCTURE
Document Type and Number:
WIPO Patent Application WO/2022/077766
Kind Code:
A1
Abstract:
A backlight constant-current control circuit (1) and a backlight structure (14). The backlight constant-current control circuit (1) comprises a light-emitting module (2) and a constant-current control module (3), wherein the constant-current control module (3) comprises a first switch unit (4); and the constant-current control module (3) is used for adjusting, upon detecting that a working current of the light-emitting module (2) deviates from a pre-set current, a turning-on time and a turning-on degree of the first switch unit (4), so as to adjust the working current of the light-emitting module (2) to the pre-set current, such that the light emission brightness of the light-emitting module (2) is kept at the pre-set light emission brightness.
Inventors:
LIU JINFENG (CN)
Application Number:
PCT/CN2020/139008
Publication Date:
April 21, 2022
Filing Date:
December 24, 2020
Export Citation:
Assignee:
TCL CHINA STAR OPTOELECTRONICS TECH CO LTD (CN)
International Classes:
G09G3/34; H05B45/325; H05B45/345
Foreign References:
| CN103440848A | 2013-12-11 | |||
| CN105657899A | 2016-06-08 | |||
| CN106132025A | 2016-11-16 | |||
| CN102956204A | 2013-03-06 | |||
| CN103037597A | 2013-04-10 | |||
| US20070159421A1 | 2007-07-12 |
Attorney, Agent or Firm:
PURPLEVINE INTELLECTUAL PROPERTY (SHENZHEN) CO., LTD. (CN)
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