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Backlight adjustment method and device of intelligent display device

A technology of intelligent display and backlight adjustment, applied to static indicators, instruments, etc., can solve the problems of inability to realize fine control of backlight value, unbalanced dark area and bright area, etc., to improve the transparency and details of the display screen Layers, good picture effect, anti-saturation effect

Active Publication Date: 2018-02-13
HISENSE VISUAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the implementation, the backlight value and compensation value of each partition are calculated using a unified formula, which cannot balance the dark area and bright area in the case of high image complexity, and cannot achieve fine control of the backlight value.

Method used

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  • Backlight adjustment method and device of intelligent display device
  • Backlight adjustment method and device of intelligent display device
  • Backlight adjustment method and device of intelligent display device

Examples

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Embodiment 1

[0061] Reference figure 1 , Shows a step flow chart of the first embodiment of a method for adjusting the backlight of a smart display device according to an embodiment of the present invention. The smart display device has multiple screen areas, which may specifically include the following steps:

[0062] Step 101: Obtain the average brightness value and the brightness characteristic value of each area when the current frame image is output in the multiple screen areas; wherein, the brightness characteristic value is used to characterize contrast;

[0063] In the embodiment of the present invention, when the smart display device is specifically applied to play a video, the brightness value of the pixels of the current frame image is calculated to obtain the brightness average value and the brightness characteristic value of each area. When each screen area is output, the steps of the brightness average value and brightness characteristic value of each area include the following sub...

Embodiment 2

[0083] See image 3 , Shows a step flow chart of the second embodiment of a method for adjusting the backlight of a smart display device according to an embodiment of the present invention, which may specifically include the following steps:

[0084] Step 201: Obtain the average brightness value and the brightness characteristic value of each area when the current frame image is output in the multiple screen areas; wherein, the brightness characteristic value is used to characterize contrast;

[0085] In actual application, calculate the brightness value of each pixel of the current frame image; use the brightness value of each pixel to calculate the maximum brightness and the average brightness of the multiple screen areas; respectively for the brightness of the multiple screen areas The maximum value and the brightness average value are subjected to a difference operation to obtain the brightness characteristic values ​​of the multiple screen regions. The brightness value may be ...

Embodiment 3

[0112] In order to enable those skilled in the art to better understand the embodiments of the present invention, the following describes specific examples of adjusting the brightness of the backlight by using the backlight value and the compensation value.

[0113] Reference Figure 4 , Shows the internal structure of a smart display device, which includes a backlight source group 1 placed on one or both sides of a liquid crystal display (LCD, Liquid Crystal Display), a liquid crystal panel 2 that displays video images, and controls the backlight Source determines the value of the light-emitting PWM circuit, determines the backlight value and compensation value circuit, video converter, backlight compensation circuit, liquid crystal control circuit, and the connection of each circuit. The side backlight is divided into N backlight groups that can be individually controlled to control the corresponding areas on the LCD, as shown by the 1,2,...N dotted lines in the figure. The bac...

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Abstract

The embodiment of the invention provides a backlight adjustment method and device of an intelligent display device. The intelligent display device has multiple screen areas. The backlight adjustment method comprises the steps that when a current frame of image is output in the multiple screen areas, a lightness average value of all the areas and lightness characteristics values are acquired; a grayscale interval to which the lightness average value of all the areas belong is determined as a target grayscale interval; in the target grayscale interval, a corresponding backlight value and a corresponding compensation value are determined according to the lightness characteristic value of the current screen area, wherein in different target grayscale intervals, the backlight values and the corresponding compensation values can be different; the backlight lightness of the current screen area is adjusted by adopting the backlight value; display of the image is adjusted by adopting the compensation value. According to the embodiment, the backlight values and the compensation values can be determined according to the proportions of bright areas to dark areas in different image contents, better picture effects without light leakage can be obtained for the dark areas, the situation can be avoided that original picture layers are lost due to saturation of the bright areas, and the permeability and detail layer of the displayed picture are improved.

Description

Technical field [0001] The present invention relates to the technical field of intelligent display equipment, in particular to a backlight adjustment method and a backlight adjustment device. Background technique [0002] With the continuous advancement of science and technology, the global 4K TV market is growing rapidly. It is estimated that shipments will reach 60.65 million units before 2017, accounting for more than 24% of the overall TV market. 4K TVs are based on light-emitting diodes (LED, Light- Emitting Diode) is an ultra-thin TV with a backlight source and LCD screen as a display screen. The current resolution is up to 4096*2160; 4K TV has become an important milestone in the development of the TV industry. 4K TVs need to be ultra-thin, environmentally friendly and energy-saving, with excellent picture quality and high contrast. [0003] Most of the 4K TVs on the market are in the form of side-lit light-emitting, and the light can be evenly distributed across the TV pla...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/34
CPCG09G3/342
Inventor 刘丽丽
Owner HISENSE VISUAL TECH CO LTD
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