Brightness adjuster and adjusting method

Abstract

A brightness adjustment installment for a display system, adjust the No.i image brightness of the inputting image list which includes some images and every image consists of some pixels. The installment includes: a first computational module computes a present brightness indicative rate of the No.i image, a second computational module computes a indicative rate of average brightness, a judgment module chooses an indicative rate of the outputting brightness between the indicative rate of the present brightness and the indicative rate of the average brightness, a confirming module which saves some groups of brightness indicative rate and the corresponding gain value, and determine the gain value which correspond to the output brightness indicative rate, a adjustment module which multiply the gray-scale value of every pixel in the No.i image and the gain value of the outputting brightness indicative rate to completes the adjustment of the brightness.

Description

technical field [0001] The invention relates to a device and method for adjusting output brightness of an input image sequence (Video sequence) in a display system. In particular, the brightness adjusting device of the present invention is applicable to various color spaces. Background technique [0002] Flat panel display (Flat panel display) is the main trend of future displays, and liquid crystal display (LCD) is the most attention-grabbing among them. Because LCD has the advantages of thin thickness, light weight, low radiation, low power consumption, high resolution and high brightness, and its application range covers personal computers, commercial billboards and home theaters, etc., it can be said to be the most widely used flat-panel display. . [0003] The brightness of the existing LCD is produced by the backlight module, and the pass rate of the backlight can be changed by controlling the twist of the liquid crystal to determine the brightness (gray scale) of th...

AI Technical Summary

Problems solved by technology

Since the luminous flux emitted by LCD TVs will vary significantly with the brightness representation rate of the image, when the image of the program often changes in areas with high and low brightness representation rates, the pupil zoom will also vary with the brightness representation rate. changes, which can easily cause eye fatigue

[0005] In addition, LCD TVs are not only likely to cause eye load when watching programs for a long time, but also easily cause the feeling of poor image contrast.

The reason is that the pupil cannot be zoomed in real time, and it takes a certain amount of time to adjust

If the frequency of bright and dark changes in the program is too high, the human eye cannot adjust the appropriate amount of light in real time, which will cause a feeling of poor image contrast

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