Title:
LUMINANCE ADJUSTING METHOD FOR LED DISPLAY SCREEN SYSTEM
Document Type and Number:
WIPO Patent Application WO/2018/133182
Kind Code:
A1
Abstract:
A luminance adjusting method for an LED display screen system. The LED display screen system comprises an input signal end for adjusting luminance, a PWM controller, a PWM signal generator, and an LED power source driver for generating backlight current of an LED lamp. The method adjusts the luminance of an LED display screen based on the LED display screen system, and comprises the following steps: S1, obtaining a correspondence between the duty ratio of the PWM controller and the physical luminance of the LED display screen; S2, obtaining an adjusting signal of the input signal end and the current duty ratio, and comparing, determining, and setting the duty ratio outputted by the PWM controller according to the adjusting signal; S3, generating a PWM signal of the corresponding physical luminance of the LED display screen by the PWM signal generator according to the duty ratio. High-precision luminance adjustment is achieved, the luminance of the LED display screen can be adjusted to be extremely low, and the human eyes can recognize content on the LED display screen in extremely dark and extremely bright environments.
Inventors:
XIE YUAN (CN)
YAO CHENGZHONG (CN)
JIA QIZHONG (CN)
LI MIN (CN)
YAO CHENGZHONG (CN)
JIA QIZHONG (CN)
LI MIN (CN)
Application Number:
PCT/CN2017/076091
Publication Date:
July 26, 2018
Filing Date:
March 09, 2017
Export Citation:
Assignee:
GOLDENTREK TECH CO LTD (CN)
International Classes:
G09G3/32
Foreign References:
| CN105430198A | 2016-03-23 | |||
| CN101707040A | 2010-05-12 | |||
| CN101770751A | 2010-07-07 | |||
| CN101188099A | 2008-05-28 | |||
| CN102088500A | 2011-06-08 | |||
| US20070176883A1 | 2007-08-02 |
Attorney, Agent or Firm:
SHENZHEN KAIDA PARTNERS INTELLECTUAL PROPERTY LAW FIRM (CN)
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