Timing Controller Mura Compensation Toggle for LCD Grayscale Transitions
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Solution Overview
Problem
Conventional Mura compensation systems for liquid crystal display panels cause display abnormalities when performing compensation on specific pictures, such as grayscale transition or single grayscale value pictures, leading to indistinguishable grayscale transitions and uneven brightness.
Innovation Solution
A Mura compensation optimization method and system that detects whether an original picture is a grayscale transition or single grayscale value picture, allowing the timing controller to toggle the Mura compensation function on or off, ensuring appropriate compensation only for pictures that require it, thereby avoiding display abnormalities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If Mura compensation is performed on all pictures, then the Mura phenomenon is eliminated or attenuated, but display abnormality occurs on grayscale transition pictures
Solution Approach 1:
The patent applies dynamics by making the Mura compensation function adjustable rather than fixed. The timing controller dynamically switches the compensation function on or off based on the type of picture being displayed. For grayscale transition pictures, the compensation function is turned off to avoid display abnormalities, while for other pictures it remains on to eliminate Mura phenomenon, thus adapting to different display scenarios
Solution Approach 2:
The patent applies local quality by differentiating treatment for different types of pictures. Instead of uniformly applying Mura compensation to all pictures, the system identifies grayscale transition pictures through detection and applies different processing (turning off compensation) specifically for this local case, while maintaining compensation for other picture types, thereby achieving localized optimization
2Illumination intensity
If grayscale compensation value is added to all regions, then brightness uniformity is improved, but grayscale transition boundary becomes indistinguishable
Solution Approach 1:
The system dynamically adjusts the application of grayscale compensation based on picture content. When a grayscale transition picture is detected, the compensation function is turned off, preserving the original grayscale transitions. For non-grayscale transition pictures, compensation is applied to improve brightness uniformity, thus dynamically balancing between the two competing requirements
Solution Approach 2:
The patent uses preliminary detection to identify grayscale transition pictures before compensation is applied. By detecting the picture type in advance and preemptively turning off the compensation function for grayscale transition pictures, the system prevents the harmful effect of indistinguishable grayscale boundaries before it occurs
Data Source
AI summary
A Mura compensation optimization method and system for liquid crystal display panel is disclosed. The method detecting the received original picture data signal and determining whether an original picture is a grayscale transition picture or a single grayscale value picture by a timing controller; and when determining that the original picture is a grayscale transition picture or not a single grayscale value picture, turning off a Mura compensation function by the timing controller. The present invention can avoid the phenomenon of display abnormality caused by Mura compensation under some specific screens, and optimize the Mura compensation effect of the liquid crystal display panel.