Method for integrally adjusting light of LED backlight and device thereof
A technology of LED backlight and overall dimming, which is applied in the field of video image processing and control, can solve the problems that affect the development and improvement of technology, and the research on image quality and energy saving has not been in-depth, so as to achieve the effect of good display quality
Active Publication Date: 2010-03-17
FUZHOU UNIV
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Problems solved by technology
[0003] At present, there is no perfect solution for the circuit drive of LED backlight. At the same time, the research on improving image quality and energy saving, such as dynamic modulation, has not been in-depth, which has affected the development and improvement of this technology.
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[0012] In a preferred implementation example of the present invention, the present invention provides a method for overall dimming of LED backlight sources, which is characterized in that: firstly, the degree of distortion of dimming of the backlight source is preset, and the dynamic range of the image is compressed according to the degree of distortion to limit the In a small area; then the image is stretched and compensated, and the backlight compensation factor is calculated using a prediction method; finally, the external brightness and the backlight compensation factor are comprehensively judged, and the backlight dimming parameters are output.
[0013] The compression method includes an overall compression method or a high-brightness area compression method. Here, the present invention takes the background brightness factor into consideration when compressing and stretching the image, utilizes the characteristic that the human eye is relatively insensitive to the bright a...
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The invention relates to a method for integrally adjusting the light of an LED backlight, which is characterized of comprising the steps of: firstly presetting the light-adjusting distortion degree ofthe backlight, and compressing the image dynamic range according to the distortion degree to be limited in a small area; secondly stretchy compensating the image, and counting backlight compensatingfactor with a predict method; and finally integrally judging the outer illumination and the backlight compensating factor to output backlight light-adjusting parameters. According to the method, the invention also provides a device for integrally adjusting the light of the LED backlight, comprising an LED backlight light-adjusting parameters setting interface, wherein the device is characterized in that the interface is sequentially connected with a video acquiring unit and an image preprocessing unit, an image dynamic compressing unit and a stretchy processing unit, and a backlight illumination judging unit and a backlight light adjusting unit. The invention can control the illumination of the LED backlight according to the characteristic of the display image, thereby not only having higher display quality, but also having good energy saving effect.
Description
technical field [0001] The invention relates to a liquid crystal display device, in particular to a method and device for overall dimming of an LED backlight source of a liquid crystal display device, and belongs to the field of liquid crystal display and backlight source, and also belongs to the field of video image processing and control. Background technique [0002] LED backlight has the advantages of long life (100,000 hours), high color purity, high color reproduction rate, high brightness, low temperature resistance, strong adaptability, good reliability, and no mercury pollution. It must be used in the field of LCD backlight in the future. will occupy a pivotal position. At present, small-sized LCD panels have widely used LEDs as backlights, and the design of backlight structures such as light guides and diffuse reflections is becoming more and more mature. However, in the liquid crystal display module, the power consumption of the backlight source can account for m...
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IPC IPC(8): G09G3/36H05B37/02
CPCY02B20/40
Inventor 姚剑敏郭太良辛琪
Owner FUZHOU UNIV