Self-adapting dynamic backlight control system and method based on image content

A technology of dynamic backlight control and image content, applied to static indicators, instruments, etc., can solve the problems of original video content compensation, unresolved image content, distortion, etc., achieve strong compatibility, facilitate backlight scanning, and solve light leakage problems Effect

Inactive Publication Date: 2015-11-11
XI AN JIAOTONG UNIV
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Problems solved by technology

Although the weighted average method of the average value and the maximum value overcomes the problems of the average value method and the maximum

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  • Self-adapting dynamic backlight control system and method based on image content
  • Self-adapting dynamic backlight control system and method based on image content
  • Self-adapting dynamic backlight control system and method based on image content

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[0054] The present invention will be further described in detail below in conjunction with the drawings.

[0055] See Figure 1 to Figure 4 , The system of the present invention is divided into two major modules, backlight brightness calculation and original image content compensation. The video stream is divided into two channels after entering the system: one is used to calculate the backlight brightness; the other is used for liquid crystal compensation. The backlight calculation module obtains the backlight value of the current block, outputs it through a programmable serial interface, and provides the liquid crystal compensation module with judgment conditions for whether to perform compensation; the liquid crystal compensation module uses the judgment conditions provided by the backlight calculation module and the judgment conditions generated by itself Output after pixel compensation.

[0056] The implementation process of the present invention is as follows figure 1 As s...

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Abstract

The invention discloses a self-adapting dynamic backlight control system and method based on image content. According to image content, a plurality of backlight regions are control independently, therefore the effects are achieved that power consumption is lowered and frame contrast is raised. A video stream is divided into two paths: one path is used for calculating backlight brightness, and the other path carries out liquid crystal compensation. In the backlight brightness calculation path, a histogram statistic module carries out statistics of image brightness, weighted average of the maximum value and the average value of the corresponding regions is carried out and backlight brightness information of the current region is obtained. Through a set threshold determination condition, the brightness is adjusted, final brightness information is obtained, adjustment by an output control module is carried out, and output through a serial data flow is carried out. In addition, because an image content distortion phenomenon can happen after backlight modulation, compensation of the original video signal is carried out according to the obtained backlight brightness information in the liquid crystal compensation path, and screening display as a final video signal is carried out.

Description

technical field [0001] The invention belongs to the field of digital television and digital video processing, in particular to a dynamic backlight control system and method based on image content self-adaptation. Background technique [0002] Traditional digital TVs use surface light sources with constant brightness, which consumes a lot of power, which is the most energy-consuming part of the digital TV system, and the transmittance of the liquid crystal unit is difficult to control to zero, that is, light leakage occurs, resulting in a decrease in image contrast. Reducing the power consumption of the backlight reduces the power consumption of the whole machine. The technologies include improving the driving circuit of the backlight source, improving the luminous efficiency of LEDs, developing new types of LEDs, and dynamic backlighting. Dynamic backlight can just make up for the shortcomings caused by surface light sources, and is the easiest and most effective technology...

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Application Information

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IPC IPC(8): G09G3/34G09G3/36
Inventor 孙宏滨刘超陶维乾郑南宁
Owner XI AN JIAOTONG UNIV
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