Dynamic regional backlight dimming method based on improved shuffled frog-leaping algorithm

Abstract

The invention relates to a dynamic regional backlight dimming method based on an improved shuffled frog-leaping algorithm. On the basis of a image-brightness-based typical feature value, a dynamic regional backlight dimming problem is transformed into an optimization problem and an improved shuffled frog-leaping algorithm is used for solving the problem, so that one solution is found out among all partition brightness distribution solutions and thus an image after regional diming has the highest display quality under the circumstance that the certain energy consumption is not exceeded. One group of initial backlight brightness values is determined by using an image-brightness-based feature parameter statistic method; and optimum backlight brightness values of all divided regions are calculated by using an improved shuffled frog-leaping algorithm to obtain an optimal divided-region backlight brightness distribution solution. With the determined regional backlight brightness distribution solution, distortion of an image after dimming is reduced and thus the image display quality is ensured; the energy consumption is reduced to the great extent; and the mutual restriction relationship between the image display quality and the energy consumption is balanced.

Description

technical field [0001] The invention relates to a method for dynamic dimming of an area backlight. In particular, it relates to an area backlight dynamic dimming method based on an improved shuffle leapfrog algorithm. Background technique [0002] 1. The brightness adjustment problem of the area backlight [0003] The backlight module is the main energy-consuming component of the Liquid Crystal Display (LCD), and almost 90% of the electricity can be consumed on the backlight panel. The traditional LCD backlight uses a surface light source with constant brightness. The brightness of the backlight cannot be dynamically changed according to the content of the displayed image. Even when displaying a dark scene image, the brightness of the backlight is always on, which leads to a large waste of energy consumption. At the same time, this backlight mode causes severe light leakage in the liquid crystal and limits the improvement of the contrast of the LCD, which leads to low cont...

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Problems solved by technology

[0010] Theoretically, the backlight module can make each pixel correspond to a backlight partition, that is, each pixel corresponds to a backlight LED light, but considering the cost, heat dissipation performance and other factors, in practical applications it is a A partition contains hundreds or thousands of pixels. In this case, there is a problem of light crosstalk between partitions, that is, the actual backlight brightness of pixel ii is not only affected by the backlight brightness of its own partition, but also by the brightness of other backlight partitions. Impact

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