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Method and device for controlling back light brightness of display

A technology of brightness control and control device, which is applied in the method of comparing with reference electrical parameters, static indicators, instruments, etc., can solve the problems of low contrast, inability to meet the refined control of backlight in different areas, and high power consumption, and achieves Soft picture effect

Inactive Publication Date: 2010-02-10
HISENSE VISUAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, since this algorithm can only calculate a backlight brightness signal based on the current entire image, it cannot satisfy the fine control of backlight in different areas.
Therefore, the applicant believes that this backlight control method has at least the following disadvantages: poor picture softness, low contrast, and high power consumption

Method used

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  • Method and device for controlling back light brightness of display
  • Method and device for controlling back light brightness of display

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Embodiment Construction

[0037] In order to enable those skilled in the art to better understand the solution of the present invention, and to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the embodiments and the accompanying drawings.

[0038] figure 1 It is a schematic flowchart of a typical embodiment of the control method of the present invention.

[0039] Step S1: Each image is equally divided into at least 2 blocks. As a preferred embodiment of the present invention, the applicant divides the image into 500 blocks.

[0040] Step S2 500 images correspond to 500 independent backlight units, and each backlight unit collects brightness information of the corresponding image.

[0041] Step S3 generates a brightness control signal according to the brightness information and the current environment brightness.

[0042] The specific control methods are as follows:...

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Abstract

The invention relates to a method for controlling the back light brightness of a display, comprising the following steps: averagely dividing each image into at least two pieces; generating a brightness control signal according to the brightness information of each image and the brightness of a current environment; and controlling the back light of each image according to the brightness control signal of each image. The invention also discloses a back light control device of the display. The invention can improve the softness of a picture and heighten the contrast of the picture and can also reduce the power dissipation of equipment.

Description

Technical field [0001] The present invention relates to a backlight control method and device of a display, in particular to a backlight control method and device of a liquid crystal display using LED as a backlight source. Background technique [0002] The emergence of LED backlight makes it possible for people to control the brightness of the backlight according to the image intelligence. In the prior art, there is a method for controlling the brightness of an LED backlight, which can perform new analysis and calculation according to the brightness of the collected image, generate a control signal, and make the LED backlight work in a discontinuous mode, thereby achieving the purpose of reducing power consumption. [0003] Another backlight source control method in the prior art mainly uses a light-sensing signal to generate a PWM control signal to directly adjust the backlight source voltage linearly. While adjusting, either part of the power consumption or image quality is sacr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/20G09G3/36G01J1/10
Inventor 徐志强
Owner HISENSE VISUAL TECH CO LTD
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