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Backlight adjustment method and device 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: 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

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

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Embodiment 1

[0088] refer to figure 1 , which shows a flow chart of the steps 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, and may specifically include the following steps:

[0089] Step 101: Obtain the brightness characteristic value of each screen region when the current frame image is output in the plurality of screen regions; wherein, the brightness characteristic value is used to represent the contrast;

[0090] In the embodiment of the present invention, the intelligent display device can be any liquid crystal display device using light-emitting diodes as a backlight source such as a computer monitor, a high-definition television, etc., and the embodiment of the present invention does not make any limitations.

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

Embodiment 2

[0112] refer to image 3 , which shows a flow chart of steps in Embodiment 2 of a method for adjusting a backlight of a smart display device according to an embodiment of the present invention. The smart display device has multiple screen areas, and may specifically include the following steps:

[0113] Step 201: Obtain the brightness characteristic value of each screen region when the current frame image is output in the plurality of screen regions; wherein, the brightness characteristic value is used to represent the contrast;

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

Embodiment 3

[0153] In order for 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 will be described below.

[0154] refer to Figure 5 , shows an internal structural diagram of a smart display device, which includes a backlight light source group 1 placed on one side or both sides of a liquid crystal panel (LCD, Liquid Crystal Display), a liquid crystal panel 2 that displays video images, and controls the backlight The source determines the value of the PWM circuit for lighting, the circuit for determining the backlight value and compensation value, the video converter, the backlight compensation circuit, the liquid crystal control circuit, and the connection of each circuit. The side backlights are divided into N backlight groups that can be individually controlled, respectively controlling the corresponding areas on the LCD, as sho...

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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 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 the shipment volume 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 used as the backlight source, and the LCD screen is used as the ultra-thin TV for the 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 lighting, and the light can be evenly d...

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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