Dynamic backlight control method

A technology of dynamic backlight control and control method, applied to static indicators, instruments, etc., can solve the problems of insufficient control method and limited display effect of liquid crystal display

Inactive Publication Date: 2010-07-14
HISENSE VISUAL TECH CO LTD
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  • Claims
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Problems solved by technology

[0008] The prior art represented by the above-mentioned patented technology provides a variety of methods and corresponding devices for controlling the backlight by using the brightness

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Embodiment Construction

[0032] The present invention provides a method for dynamically adjusting the brightness of the backlight. By adjusting the brightness of the full-screen backlight, the problem of light leakage inherent in dark gray scales inherent in liquid crystal display and structural coordination is overcome, the dynamic contrast is improved, the image quality is improved, and energy saving is achieved. environmental protection purposes.

[0033] figure 1Shown in is a flow chart of the backlight control method utilizing the present invention. In this embodiment, in order to improve the liquid crystal display problem in both the normal mode and the energy-saving mode of the liquid crystal display, and prevent light leakage from the liquid crystal display. In this embodiment of the present invention, two modes are adopted. Each mode corresponds to a different adjustment curve. The relationship between the brightness of the backlight in each curve and the average brightness value of the full...

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Abstract

The invention relates to a light-emitting control method for adopting and controlling liquid crystals to emit light from independent light sources for displaying characters, in particular to a dynamic backlight control method for an LED display panel. The control method comprises the following steps: setting at least one control point between two preset fixed threshold values of the average brightness of the full screen, and forming a regulation curve corresponding to backlight brightness between the control point and each of the two fixed threshold values to be used as a reference for backlight regulation; computing the weighted average of the previously computed average brightness value and the subsequently computed average brightness value to acquire the average brightness value of the full screen of the current frame image; and correspondingly regulating the backlight brightness according to the backlight brightness value corresponding to the average brightness value on the regulation curve used as the reference for backlight regulation. Thus, the invention provides a method for dynamically regulating backlight brightness, which overcomes the defect of light leakage of the inherent dark gray scale in liquid crystal display and structure coordination, increases the dynamic contrast, improves the image quality, and realizes the purposes of energy saving and environmental protection.

Description

technical field [0001] The invention relates to a lighting control method using liquid crystal and controlling the lighting from an independent light source for displaying characters, in particular to a dynamic backlight control method of an LED display panel. Background technique [0002] The liquid crystal panel in the widely used liquid crystal display does not emit light, but relies on the backlight behind the liquid crystal panel to provide a light source to complete the display function. At present, the most used backlight source in liquid crystal panels is light-emitting diode LED. As the backlight source of liquid crystal display, LED has excellent color reproduction, good brightness uniformity, long service life and good shock resistance. It has been used in backlight devices of liquid crystal panels. middle. However, in the existing design, in order to improve the display quality and overcome its own inherent defects, people think of effectively controlling the ba...

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Application Information

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IPC IPC(8): G09G3/34G09G3/36
Inventor 张晓峰
Owner HISENSE VISUAL TECH CO LTD
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