Two-Stage Demura Processing for Display Panel Brightness Uniformity
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Solution Overview
Problem
The existing demura processing methods for display panels often result in suboptimal display effects, making it difficult for whole machine factories to debug and improve the display quality, especially due to limitations in the capabilities and cooperation between the driving chip and main control chip.
Innovation Solution
A display effect enhancement method and apparatus that involves a two-stage brightness compensation process, where a first demura module in the main control chip and a second demura module in the driving chip work together to determine target and non-target pixels based on grayscale values, performing brightness compensation to enhance the display effect, with the ability to selectively turn on or off modules based on preset rules and compensation effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If demura processing is performed only by the driving chip, then the device complexity is low, but the display effect is insufficient
Solution Approach 1:
The demura processing function is segmented between two independent modules: a first demura module in the main control chip and a second demura module in the driving chip. Each module performs brightness compensation on specific pixels, dividing the overall demura task to achieve better display effects while maintaining modular architecture.
Solution Approach 2:
The patent combines the demura processing capabilities of both the main control chip and the driving chip into a unified two-stage processing system. The first demura module and second demura module work together in sequence, merging their complementary functions to achieve superior display effects that neither module could achieve alone.
2Manufacturing precision
If the whole machine factory performs debugging after demura processing, then the display effect can be improved, but it is limited by the driving chip capability
Solution Approach 1:
The first demura module in the main control chip performs preliminary brightness compensation before the image data reaches the driving chip. This preliminary processing reduces the debugging burden on the whole machine factory and compensates for limitations in the driving chip's demura capability, allowing for better display effects without requiring extensive post-processing debugging.
3Manufacturing precision
If brightness compensation is performed on all pixels, then the display effect is improved, but the processing time increases
Solution Approach 1:
The patent applies local quality by differentiating between target pixels and non-target pixels. The first demura module processes only target pixels with non-zero brightness compensation values, while non-target pixels receive zero compensation. This selective processing approach maintains display quality while reducing overall processing time compared to uniform processing of all pixels.
Data Source
AI summary
The present invention provides a display effect enhancement method, apparatus, and device. The apparatus includes: an obtaining module configured to obtain a grayscale value of each pixel of a picture to be displayed; a first demura module located in a main control chip and configured to perform, according to the grayscale value of each pixel, a first brightness compensation on the picture to be displayed; a second demura module located in a driving chip and configured to perform a second brightness compensation on the picture to be displayed that has been subjected to the first brightness compensation; and a display module configured to display the picture to be displayed that has been subjected to the second brightness compensation. According to the present invention, in consideration of the fact that the main control chip includes the first demura module, two times of demura are performed, on the basis of the first demura module of the main control chip and the second demura module of the driving chip, on a grayscale image having a display effect to be enhanced, thus effectively improving a display effect of a display panel for a picture.