Dynamic Backlight Modulation for LCD Visual Quality
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Solution Overview
Problem
Existing liquid crystal panel backlight technologies fail to provide satisfactory visual effects, particularly in Internet TV and intelligent TV systems, as they cannot effectively manage image information and brightness levels to enhance contrast and layered perception.
Innovation Solution
A TV set with a processor-readable storage medium and processors that determine the amount of image information, retrieve a backlight gain coefficient, calculate a gained backlight value, and transmit it to a light source drive circuit to dynamically modulate the backlight, using a memory to store image information and corresponding backlight gain coefficients, and an equation f(x)=k(α)×x to process the backlight value, along with an image compensating unit to adjust the video signal accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional backlight control methods are used, then the device structure remains simple, but the visual effect and image quality are unsatisfactory
Solution Approach 1:
The patent divides the backlight control into multiple processing stages: image information amount determination, backlight gain coefficient retrieval, backlight value extraction, and gained backlight value calculation. Each stage is handled by a dedicated functional unit, transforming a complex control task into manageable segments that improve visual effect while maintaining systematic organization
Solution Approach 2:
The patent performs preliminary determination of image information amount and retrieval of backlight gain coefficients before actual backlight adjustment. This preparatory processing allows the system to optimize backlight parameters in advance based on image characteristics, improving visual quality without adding excessive complexity during real-time operation
2Illumination intensity
If uniform backlight intensity is applied, then the control system remains simple, but the contrast and layered perception of the image are insufficient
Solution Approach 1:
The patent applies different backlight gain coefficients to different regions or areas of the display based on local image information characteristics. By determining image information amount and retrieving corresponding backlight gains for specific regions, the system achieves local backlight intensity variation that enhances contrast and layered perception without requiring complex global control mechanisms
Solution Approach 2:
The patent implements dynamic backlight adjustment by continuously determining image information amount and calculating gained backlight values based on real-time image characteristics. This dynamic modulation allows the backlight intensity to adapt to varying image content, creating enhanced contrast and depth perception while maintaining a relatively simple control architecture through algorithmic adaptability
Data Source
AI summary
A TV set including a liquid crystal panel, a processor-readable storage medium storing instruction units for providing the TV set functions to control backlight of the liquid crystal panel; and one or more processors in communication with the storage medium to execute the instruction units, wherein the instruction units include: an image information amount determining unit (102); the backlight gain retrieving unit (104); a backlight value extracting unit (106); the backlight value processing unit (108); and a backlight value transmitting unit (110). Correspondingly a method of controlling backlight of a liquid crystal panel is further disclosed. In the technical solution of the disclosure, a backlight modulation coefficient can be modulated dynamically according to the amount of image information to perform backlight enhancement on an image with a large amount of information.