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Double-layer liquid crystal screen, backlight brightness control method and device and electronic device

A technology of brightness control and backlight brightness, applied in instruments, static indicators, etc., can solve problems such as halo, and achieve the effect of improving contrast and avoiding halo phenomenon.

Active Publication Date: 2018-11-23
SHENZHEN SKYWORTH RGB ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Embodiments of the present invention provide a double-layer liquid crystal screen, backlight brightness control method, device, and electronic equipment to improve the contrast of the display screen and solve the halo problem existing in the traditional area dimming method

Method used

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  • Double-layer liquid crystal screen, backlight brightness control method and device and electronic device
  • Double-layer liquid crystal screen, backlight brightness control method and device and electronic device
  • Double-layer liquid crystal screen, backlight brightness control method and device and electronic device

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Embodiment 1

[0050] figure 1 It is a schematic structural diagram of a double-layer liquid crystal panel provided in Embodiment 1 of the present invention. see figure 1 As shown, the double-layer liquid crystal screen includes: a correspondingly arranged display liquid crystal screen 110 and a brightness control liquid crystal screen 120; wherein, the brightness control liquid crystal screen 120 includes a backlight source 121, an array substrate 122, and a polarizer 123 (the polarizer 123 includes an upper The polarizer 1231 and the lower polarizer 1232) and the liquid crystal cell 124 are used to control the size of the incident light of the backlight source 121 in the corresponding partition according to the average brightness of each preset partition of the image to be displayed, specifically, according to the average brightness of each preset partition of the image to be displayed. Set the average brightness of the partition to generate a control voltage corresponding to the partitio...

Embodiment 2

[0057] image 3 It is a schematic flowchart of a backlight brightness control method provided by Embodiment 2 of the present invention. The backlight brightness control method disclosed in this embodiment is applied to the double-layer liquid crystal screen described in the above embodiment, and the method can be executed by a backlight brightness control device, wherein the device can be implemented by software and / or hardware, and is generally integrated in a terminal , such as TV, etc. For details, see image 3 As shown, the method includes the following steps:

[0058] 310. Divide each frame of the image to be displayed into a set number of pixel blocks based on preset partitions.

[0059] For example, the resolution of the image to be displayed is 3840*2160, and the resolution of the brightness control liquid crystal screen 120 is 1920*1080, that is, the number of preset partitions is 1920*1080; then the image to be displayed is divided into 1920 *1080 2*2 pixel block...

Embodiment 3

[0073] Figure 4 It is a schematic flowchart of a backlight brightness control method provided by Embodiment 3 of the present invention. On the basis of the above-mentioned embodiments, this embodiment performs data compensation on the image of the dark picture to ensure the clarity of the dark picture. For details, see Figure 4 As shown, the method includes the following steps:

[0074] 410. Divide each frame of the image to be displayed into a set number of pixel blocks based on preset partitions.

[0075] 420. Calculate the average brightness value of each pixel block.

[0076] 430 Generate, according to the average brightness value, a brightness control signal of a backlight control partition matching each corresponding pixel block.

[0077] 440. Control the backlight brightness of each corresponding pixel block through the array substrate in the brightness control liquid crystal screen based on the brightness control signal.

[0078] 450 . Determine whether the disp...

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Abstract

The embodiment of the invention discloses a double-layer liquid crystal screen, a backlight brightness control method and device and an electronic device. The method comprises: each frame of to-be-displayed image is divided into a set number of pixel blocks based on preset partitions; an average brightness value of each pixel block is calculated; according to the average brightness value, brightness control signals of backlight control partitions matching all corresponding pixel blocks are generated; and on the basis of the brightness control signals, an array substrate in a liquid crystal screen is controlled based on the brightness to control the backlight brightness of all corresponding pixel blocks. With the backlight brightness control method, the contrast of the to-be-displayed imageis improved and thus the transition between the bright picture and the dark picture of the image becomes natural, so that halo phenomenon is avoided.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of LED backlight brightness control, and in particular to a double-layer liquid crystal screen, a backlight brightness control method, device and electronic equipment. Background technique [0002] With the pursuit of higher and higher image quality, many mid-to-high-end TVs have used multi-zone backlight to realize display. The traditional local dimming backlight module uses a backlight composed of hundreds of LED lights to replace the CCFL (Cold Cathode Fluorescent Lamp, cold cathode fluorescent lamp) backlight. The LED lights that make up the backlight can be adjusted according to the brightness of the image. The LED light used to display the bright part of the image to be displayed can be adjusted to the maximum brightness, while the LED light used to display the dark part of the image to be displayed can be correspondingly reduced or even turned off to achieve the best contrast...

Claims

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Application Information

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IPC IPC(8): G09G3/34G09G3/36
CPCG09G3/3406G09G3/3413G09G3/3607
Inventor 肖志林陈洪波
Owner SHENZHEN SKYWORTH RGB ELECTRONICS CO LTD
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