Method and device for adjusting backlight of intelligent display device

A smart display and backlight technology, applied to static indicators, instruments, etc., can solve the problems of not being able to take into account the content of the screen and enhance the image quality

Active Publication Date: 2019-12-24
HISENSE VISUAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, the backlight value and compensation value are calculated based on the image content of each frame. However, if the backlight value is calculated using the prior art method in a high-contrast picture with sharp changes in light and dark or in an ordinary picture with gentle changes in light and dark and compensation value, which cannot take into account all the picture content, and it is difficult to enhance the image quality more accurately

Method used

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  • Method and device for adjusting backlight of intelligent display device
  • Method and device for adjusting backlight of intelligent display device
  • Method and device for adjusting backlight of intelligent display device

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Comparison scheme
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Embodiment 1

[0088] Reference figure 1 , Shows a step flow chart of Embodiment 1 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:

[0089] Step 101: Obtain the brightness characteristic value of each screen area when the current frame image is output in the multiple screen areas; wherein the brightness characteristic value is used to characterize contrast;

[0090] In the embodiment of the present invention, the smart display device may be any liquid crystal display device that uses light-emitting diodes as a backlight light source, such as a computer monitor, a high-definition television, etc. The embodiment of the present invention does not impose any limitation.

[0091] By calculating the brightness value of the pixel of the current frame image, the brightness feature value of each screen area is obtained. When the current...

Embodiment 2

[0112] Reference 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. The smart display device has multiple screen areas, which may specifically include the following steps:

[0113] Step 201: Obtain the brightness characteristic value of each screen area when the current frame image is output in the multiple screen areas; wherein, the brightness characteristic value is used to characterize contrast;

[0114] In the embodiment of the present invention, on the smart display device, the screen of the smart display device may be divided into N screen areas, N> 1. By calculating the brightness value of the pixels of the current frame of image, it can be understood that each frame of image is divided into N sub-images by N screen areas, and each screen area has a corresponding sub-image. In other words, obtain N The brightness feature value of the screen area can ...

Embodiment 3

[0153] In order to enable those skilled in the art to better understand the embodiments of the present invention, a specific example of adjusting the brightness of the backlight by using the backlight value and the compensation value is described below.

[0154] Reference Figure 5 , 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 backlig...

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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, the lightness characteristic values of all the screen areas are acquired; according to a preset backlight threshold interval to which the lightness characteristic value of the current screen area belong, a corresponding backlight value is determined; according to the backlight values of all the screen areas, a variance characteristic value of the current frame of image is determined; according to the backlight values and the variance characteristic values, corresponding compensation values aredetermined; the backlight lightness of the current screen area is adjusted by adopting the backlight values, and display of a next frame of image is adjusted by adopting the compensation values. According to the embodiment, image saturation distortion can be prevented, the picture lightness can be guaranteed, the permeability and detail layer of the display picture can be improved, and the image quality can be improved more precisely according to different picture contents.

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 progress 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 luminescence, and the light can be evenly distributed across the TV plane th...

Claims

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Application Information

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