ADJUSTMENT METHOD FOR LED BACKLIGHT BRIGHTNESS

An adjustment method for LED backlight brightness, comprising the following steps of: if the current LED backlight brightness is greater than a preset value, maintaining the PWM duty ratio as the maximum value, and adjusting the LED backlight brightness by adjusting an LED conduction current (S10);...

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Bibliographic Details
Main Authors YANG, YONG, WEN, DONG, ZHANG, HAIYING, ZUO, DEXIANG, QIN, JIANSHE, LI, JIANQIANG
Format Patent
LanguageEnglish
French
German
Published 01.06.2016
Subjects
ELECTRIC HEATING
ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
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Summary:An adjustment method for LED backlight brightness, comprising the following steps of: if the current LED backlight brightness is greater than a preset value, maintaining the PWM duty ratio as the maximum value, and adjusting the LED backlight brightness by adjusting an LED conduction current (S10); and if the current LED backlight brightness is not greater than the pre-set value, maintaining the LED conduction current to be constant, and adjusting the LED backlight brightness by adjusting the change of the PWM duty ratio between the maximum value and the minimum value (S20). This method can improve the light-emitting efficiency of LEDs, reduce backlight loss, and reduce the noise generated by an LED drive circuit.
Bibliography:Application Number: EP20140829741