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Partition backlight-based low-delay liquid crystal display device and driving method thereof

A technology of a liquid crystal display device and a driving method, which is applied to static indicators, instruments, etc., can solve problems such as dark screens and bad display defects, and achieve the effect of improving response time

Active Publication Date: 2018-05-11
WUHAN CHINA STAR OPTOELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the solutions to motion blur mainly include: using high-frequency drive, using screen black insertion, and backlight insertion black, etc. Among them, high-frequency drive can effectively solve the picture blur phenomenon, and there is no bad display defect in the image quality, but High-frequency drive creates new hardware requirements for the response rate of liquid crystals and the amount of data in the driver IC. Black insertion technology can use the persistence of vision of the human eye to improve motion blur, but at the same time it will cause the overall picture to be dark.

Method used

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  • Partition backlight-based low-delay liquid crystal display device and driving method thereof
  • Partition backlight-based low-delay liquid crystal display device and driving method thereof
  • Partition backlight-based low-delay liquid crystal display device and driving method thereof

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Embodiment 1

[0054] ginseng Figure 2a , Figure 2b As shown, the liquid crystal display device in this embodiment includes a backlight unit 10, an array substrate 20, a liquid crystal layer 30, a pixel layer 40, a color filter substrate 50, and a polarizer 60, and also includes a A backlight drive unit, and a liquid crystal drive unit for lighting the display screen (liquid crystal layer 30, etc.).

[0055] Among them, the backlight unit 10 adopts a 2D partition design, including a number of partition backlights distributed in an array, and the number of horizontal and vertical partitions is M and N respectively.

[0056] In this embodiment, in the design of the partition backlight, a large number of small-sized Mini-LED arrays are used as the light source. On the one hand, it takes into account the advantages of thinness and lightness. It can also provide sufficient brightness for a limited time, avoiding the problem of insufficient brightness of the display device caused by the tradit...

Embodiment 2

[0058] ginseng image 3 As shown, the driving method of the low-retardation liquid crystal display device based on the partition backlight in this embodiment specifically includes:

[0059] S1. Actively scan row and column of the display screen to obtain the image gray scale of the current pixel, and obtain the image gray scale matrix.

[0060] Among them, the gray scale of the image is gray(x, y, 3), where x∈[1, height], y∈[1, width], height and width are respectively defined as the height and width of the image, and 3 represent R / G / B three channels.

[0061] S2. Normalize the image grayscale matrix according to the electro-optical curve EOTF of the display device to obtain a display driving matrix.

[0062] Preferably, the electro-optical curve is a Gamma curve, and the display driving matrix is ​​indata(x, y, 3)=(gray / 2^N) gamma , the value of gamma in this embodiment is 2.2, and N is the number of bits of the display device, such as 6, 8, 10 bits and so on.

[0063] S...

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Abstract

The invention discloses a partition backlight-based low-delay liquid crystal display device and a driving method thereof. The liquid crystal display device comprises a plurality of partition backlightwhich is distributed in an arrayed manner. The driving method comprises the following steps: S1. performing line-rank scanning to active arrays of a display screen, and acquiring the gray-level of picture of current pixel, to obtain gray-level picture matrix; S2. normalizing the gray-level picture matrix according to the electro-optical curve of the display device, to obtain displayed driving matrix; S3. dividing the displayed driving matrix into displaying partitions correspondingly one by one according to the partition backlight, and acquiring the position of the displaying partition wherethe current pixel is; and S4. Performing the gray-level distribution statistics of each displaying partition according to the position, where the current pixel is, of the displaying partition and thedisplayed driving matrix, calculating the lighting backlight coefficient of each displaying partition according to the gray-level distribution statistics of the displaying partition, and determining the displaying partition needing to be lightened according to the position where the current pixel is in the displaying partition and the position where the current displaying partition is in the displayed driving matrix.

Description

technical field [0001] The present invention relates to the field of liquid crystal display technology, in particular to a low-retardation liquid crystal display device based on partitioned backlights and a driving method thereof. Background technique [0002] The development of display terminals has gradually transitioned from simple picture display to video display. In recent years, with the rapid development of streaming media, people have put forward higher requirements for the video quality of display devices. In the traditional pursuit of image quality resolution and color reproduction On the basis of performance, contrast, etc., video playback also puts forward new technical requirements for display devices to reproduce dynamic images, and one of the important aspects is to improve motion blur. [0003] From the source, the motion blur is mainly determined by the limited response time of the display device and the visual tracking and spatial resolution characteristics...

Claims

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Application Information

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IPC IPC(8): G09G3/36
CPCG09G3/3607G09G3/3611
Inventor 查国伟崔宏青马长文
Owner WUHAN CHINA STAR OPTOELECTRONICS TECH CO LTD
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