Display Compensation Compression for Mura Artifact Reduction
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Solution Overview
Problem
Display panels, such as LCD and OLED, suffer from defects like mura due to manufacturing errors, which increase with panel size, requiring high-capacity memory for compensation, and existing compression methods lead to errors and artifacts.
Innovation Solution
A method and apparatus that compress compensation information by dividing the screen into blocks for primary and secondary compression, using differential coding and reference values to reduce memory requirements and prevent artifacts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If block-based compression is used to compress compensation information, then memory capacity is reduced, but block artifacts occur between blocks
Solution Approach 1:
The patent divides the screen into multiple blocks and performs primary compression on each block independently, then performs secondary compression on the representative values of the blocks. This segmentation approach reduces memory capacity while managing block artifacts through the two-stage compression process.
Solution Approach 2:
The patent merges adjacent blocks that have similar compensation characteristics into the same block for compression purposes. This merging reduces the number of blocks, thereby reducing block artifacts while still achieving memory capacity reduction through compression.
2Quantity of substance
If compression ratio is increased to further reduce memory capacity, then error propagation increases
Solution Approach 1:
The two-stage compression process segments the compression operations, with primary compression handling individual blocks and secondary compression handling representative values. This segmentation allows for controlled error propagation while achieving high compression ratios.
Solution Approach 2:
The patent changes the parameters being compressed at different stages: primary compression operates on individual block compensation values, while secondary compression operates on representative values of blocks. This parameter change allows for higher compression ratios with controlled error propagation.
Data Source
AI summary
The present disclosure discloses an apparatus and method for providing compensation information, which compress the compensation information for demura and a display driving apparatus for solving a defect in a screen by using compressed compensation information. The apparatus for providing compensation information includes a compensation value provision unit configured to provide compensation values of pixels and a compression unit configured to perform compression on the compensation values for each block of a screen.