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Method for adjusting brightness of backlight source

A light source brightness and backlight technology, applied in optics, nonlinear optics, instruments, etc., can solve problems such as excessive and frequent changes in brightness and visual discomfort for users

Active Publication Date: 2013-06-19
AU OPTRONICS CORP
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

Whether the brightness displayed by the LCD panel changes too frequently or suddenly, it will cause visual discomfort to the user.

Method used

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  • Method for adjusting brightness of backlight source
  • Method for adjusting brightness of backlight source
  • Method for adjusting brightness of backlight source

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Embodiment Construction

[0024] The invention relates to a method for automatically adjusting the brightness of a backlight source through ambient light sources and brightness displayed on a liquid crystal panel. The present invention is mainly used in liquid crystal display systems. Please refer to figure 1 , figure 1 It is a schematic diagram illustrating the liquid crystal display system 100 . The liquid crystal display system 100 includes a light source sensor module 102 , a controller 104 , a backlight control module 106 and a man-machine interface module 108 . The light source sensing module 102 is coupled to the controller 104 for sensing the brightness of the external light source and sending an appropriate light source input value to the controller 104 . The controller 104 is coupled to the backlight control module 106 and the man-machine interface module 108, and is used to detect the current image signal source to obtain the digital average brightness value of the picture to be displayed...

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Abstract

The invention discloses a method for adjusting the brightness of a backlight source. The method comprises the following steps of: detecting a current image signal to acquire a digital average brightness value of an image to be displayed and accordingly generate a brightness reaction stage number; entering a polling mode when the brightness of an external light source is truly changed and detecting external light source brightness repeatedly to generate a plurality of external light source brightness values; then, speculating a reasonable external light source brightness value and external light source change conditions according to the external light source brightness values and an original brightness value of the external light source; and adjusting the brightness of the backlight sourceaccording to the reasonable external light source brightness value, the external light source change conditions and the brightness reaction stage number.

Description

technical field [0001] The invention relates to a method for adjusting the brightness of a backlight source, in particular to a method for automatically adjusting the brightness of the backlight source according to the ambient light source and the brightness displayed on a liquid crystal panel. Background technique [0002] The liquid crystal panel is a non-luminescent display device, which needs a backlight source to display images. The brightness of the LCD panel refers to the brightness of the picture. Reasonable brightness can make our eyes more comfortable without affecting the color performance of the picture. Generally speaking, too high brightness is likely to cause visual fatigue to the user, and it will also affect the color scale and gray scale performance of the LCD panel. The higher the brightness displayed by the LCD panel, the easier it is to dilute the color displayed on the LCD panel. resulting in a white screen. [0003] For example, the brightness of man...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/34G09G3/36G02F1/13357
Inventor 戴明盛陈世庭
Owner AU OPTRONICS CORP
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