Liquid crystal display device and backlight control method thereof

Abstract

The invention discloses a liquid crystal display device and a backlight control method thereof, wherein the liquid crystal display device and the backlight control method relate to the field of display technology. The liquid crystal display device and the backlight control method settle a problem of display picture flicker aware by human eyes because of brightness non-uniformity of a picture which is displayed by the liquid crystal display device caused by frequency change of a received video signal. The liquid crystal display device comprises a processor, a microcontroller and a light emitting diode control chip. The processor is electrically connected with the microcontroller. The microcontroller is electrically connected with the light emitting diode control chip. The microcontroller is configured for generating a plurality of frame synchronization signals with a first signal frequency, and the first signal frequency is a common multiple of the frequency of at least two frame rate signals with different frequencies in a plurality of frame rate signals. The light emitting diode control chip is configured for generating a plurality of PWM signals with same frequency by means of a first signal frequency. The liquid crystal display device and the backlight control method thereof are used for driving the backlight source of the liquid crystal display device to emit light.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a liquid crystal display device and a backlight control method thereof. Background technique [0002] With the continuous development of display technology, the application of liquid crystal display devices has become more and more extensive. When displaying images, liquid crystal display devices generally first analyze the video signal from the video signal source through the processor in the liquid crystal display device, and then analyze the The frame rate signal obtained after is output to the microcontroller on the backlight driver board in the liquid crystal display device, and at the same time, the processor also outputs the backlight data signal carried by the frame rate signal to the microcontroller; then the microcontroller controls the frame The frequency signal is multiplied to obtain the frame synchronization signal and the synchronous backlight data signal carried ...

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to provide a liquid crystal display device and its backlight control method, which are used to solve the uneven brightness of the picture displayed by the liquid crystal display device caused by the change of the frequency of the received video signal, and the occurrence of artificial Visually detect flickering on the display

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