A method for adjusting the brightness of a local backlight, its adjustment system, and a display device

Abstract

The invention discloses an adjusting method and system for local backlight brightness and display device. The adjusting method comprises the steps that a pixel region corresponding to each backlight partition in a backlight source is divided into a plurality of sub partitions, and maximum values of the pixel grayscales of the sub partitions are obtained; obtained maximum values of the pixel grayscales of the sub partitions are sorted from large to small; according to sorted maximum values of the pixel grayscales of the sub partitions and the number of the sub partitions, the maximum values of the pixel grayscales except the maximum values in a first serial number are selected and an adjusting signal is confirmed so that the backlight brightness of a backlight area can be adjusted. According to the adjusting method and system for local backlight brightness and display device, the adjusting signal is confirmed through the maximum values of the selected pixel grayscales except the maximum values in the first serial number, a backlight brightness saltation caused by the movement of small light blocks such as a mouse is effectively avoided, then a visual impact on eyes of people caused by the local backlight brightness saltation is effectively avoided, and user using experience is obviously improved.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a method for adjusting the brightness of a local backlight, an adjustment system thereof, and a display device. Background technique [0002] At present, more and more Liquid Crystal Displays (LCD for short) use the backlight technology of Light Emitting Diode (LED for short), which has the advantages of long life, energy saving and convenient driving. [0003] Generally, LEDs can be driven by local backlight adjustment (Local Dimming) technology. Specifically, the local backlight adjustment method divides the LED backlight into multiple LED backlight partitions, and performs overall statistics on the pixel gray scale corresponding to each LED backlight partition. For example, if there is a grayscale value of a pixel corresponding to an LED backlight partition that is 255, then regardless of the grayscale value of other pixels, the maximum grayscale value of this area is 255, wh...

AI Technical Summary

Problems solved by technology

[0003] Generally, LEDs can be driven by local backlight adjustment (Local Dimming) technology. Specifically, the local backlight adjustment method divides the LED backlight into multiple LED backlight partitions, and performs overall statistics on the pixel gray scale corresponding to each LED backlight partition. For example, if there is a grayscale value of a pixel corresponding to an LED backlight partition that is 255, then regardless of the grayscale value of other pixels, the maximum grayscale value of this area is 255, which further determines the maximum value of the backlight brightness of this area. The statistics of the maximum value in the brightness statistics of the backlight partition will inevitably cause the statistical maximum value of the area to increase significantly when the tiny bright block enters the darker area, and then produce a local backlight brightness mutation phenomenon, which has an impact on the human eye

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