Liquid crystal display brightness control method and device, and liquid crystal display device

Abstract

The invention provides a liquid crystal display brightness control method and device and a liquid crystal display device, which belong to the technical field of liquid crystal display, wherein, according to the received image signal, the gray scale value of the image in the partitioned image data block is determined according to the preset rules, and the gray scale value of the image is determined according to the gray scale of the image Pre-extract the partition backlight value corresponding to the partition image data; multiply the preset backlight value gain variable with the pre-extracted partition backlight value to obtain the partition backlight value after the gain of the backlight partition, wherein the preset backlight value gain variable greater than 1; map the backlight value of each partition after gain to the driving circuit of the backlight in the corresponding backlight partition to drive and control the brightness of the backlight of the corresponding backlight partition; improve the contrast and image quality effect of the liquid crystal display screen.

Description

technical field

[0001] The invention belongs to the technical field of liquid crystal display, and in particular relates to a liquid crystal display brightness control method and device and liquid crystal display equipment. Background technique

[0002] A Liquid Crystal Display (LCD for short) usually uses a dynamic backlight modulation technology to control the brightness of the backlight, which can achieve image quality effects such as energy saving and improved display contrast. Such as figure 1 It is a schematic structural diagram of dynamic backlight modulation technology in liquid crystal display in the prior art. The liquid crystal display device includes an image processing unit that receives an input image signal and acquires backlight data according to the grayscale brightness of the image signal. On the one hand, according to the specifications of the predetermined display panel The format of the image signal is converted and output to the timing controller (TCON...

Examples

no. 1 approach

[0046] Such as Figure 6a Embodiment 1 of the present invention provides a schematic flowchart of a method of obtaining preset backlight gain variables, specifically:

[0047] S401. Obtain an average gray scale value of the global image according to the gray scale value of the image.

[0048] example, such as Figure 5a Embodiment 1 of the present invention provides a schematic diagram of partitioning image data blocks in a display area, combining figure 2 with Figure 5a As shown, according to the division rule of the backlight partition, the display panel is also divided into 144 virtual partitions, the global image displayed at the corresponding position on the display panel is divided into 144 partition image data blocks, and each partition image data block is extracted separately contains the grayscale values ​​of all pixels, and then obtains the average grayscale value through a preset algorithm. Among them, the predetermined algorithm can be the gray scale average ...

technical field

[0001] The invention belongs to the technical field of liquid crystal display, and in particular relates to a liquid crystal display brightness control method and device and liquid crystal display equipment. Background technique

[0002] A Liquid Crystal Display (LCD for short) usually uses a dynamic backlight modulation technology to control the brightness of the backlight, which can achieve image quality effects such as energy saving and improved display contrast. Such as figure 1 It is a schematic structural diagram of dynamic backlight modulation technology in liquid crystal display in the prior art. The liquid crystal display device includes an image processing unit that receives an input image signal and acquires backlight data according to the grayscale brightness of the image signal. On the one hand, according to the specifications of the predetermined display panel The format of the image signal is converted and output to the timing controller (TCON...

Examples

no. 1 approach

[0046] Such as Figure 6a Embodiment 1 of the present invention provides a schematic flowchart of a method of obtaining preset backlight gain variables, specifically:

[0047] S401. Obtain an average gray scale value of the global image according to the gray scale value of the image.

[0048] example, such as Figure 5a Embodiment 1 of the present invention provides a schematic diagram of partitioning image data blocks in a display area, combining figure 2 with Figure 5a As shown, according to the division rule of the backlight partition, the display panel is also divided into 144 virtual partitions, the global image displayed at the corresponding position on the display panel is divided into 144 partition image data blocks, and each partition image data block is extracted separately contains the grayscale values ​​of all pixels, and then obtains the average grayscale value through a preset algorithm. Among them, the predetermined algorithm can be the gray scale average ...

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