Backlight control module, backlight control method and liquid crystal display device

Abstract

A backlight control module, a backlight control method and a liquid crystal display device. The backlight control module includes a backlight calculation unit, which is used to set the frequency of at least one pulse width modulation signal according to the frequency of the picture when at least one area picture in at least one display area is used to display a picture; At least one initial time point of the area picture is respectively set at least one initial time point of one cycle of at least one pulse width modulation signal; and the pulse width modulation unit is coupled to the backlight calculation unit and the timing control unit for generating at least one According to the pulse width modulation signal and at least one image data of at least one area frame, at least one width of at least one open interval of the period of at least one pulse width modulation signal is respectively set, and the at least one open interval is respectively located in at least one pulse width modulation signal end of cycle. The invention can save power, reduce light leakage, increase dynamic contrast and reduce dynamic afterimage.

Description

technical field [0001] The present invention refers to a backlight control module, a backlight control method and a liquid crystal display device, especially a backlight control module and a backlight control method capable of performing regional backlight control on at least one display area of ​​a display device. Background technique [0002] With the growing maturity of backlight area control (local dimming) technology, more and more display devices (such as LCD monitors, LCD TVs, LED LCD monitors, LED LCD TVs, etc.) have built-in backlight area control. or total darkness, saving power consumption, reducing light leakage and increasing dynamic contrast. In detail, backlight region control refers to firstly dividing the display device into multiple display regions, and then adjusting the brightness and darkness of the backlights in the display regions respectively according to the brightness and darkness of the regional pictures in each display region. For example, a dark...

AI Technical Summary

Problems solved by technology

[0004] However, the frequency of the pulse width modulation signal is usually much higher than the frequency of the picture displayed by the display device, that is, the display device does not synchronize the two, and cannot solve the dynamic afterimage caused by the switching state of the liquid crystal.

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