Dynamic backlight control method

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 thefull 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...

AI Technical Summary

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 of the backlight. Certain improvements, but the control methods disclosed by them are not sufficient, and have limited effect on improving the display effect of liquid crystal displays

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