Display Panel Grayscale Compensation for Boundary Brightness Uniformity
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Solution Overview
Problem
Display terminals with a tri-gate drive architecture exhibit strong boundaries between display areas due to increased distance between data driver chips, leading to uneven brightness and reloaded images.
Innovation Solution
The display panel is divided into multiple display portions, with each portion having subpixels of the same color, and compensation grayscales are determined based on the brightness of adjacent subpixels to reduce brightness differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a tri-gate drive architecture is used to reduce the number of data driver chips, then the number of data lines is reduced to 1/3, but the distance between adjacent data driver chips increases, resulting in larger signal attenuation differences and stronger boundary presence
Solution Approach 1:
The patent applies local quality by dividing the display area into multiple display regions, each controlled by a separate data driver chip. Different gray scale compensation values are applied to different regions based on their specific brightness characteristics. This allows each region to be optimized independently, compensating for the brightness non-uniformity caused by increased distance between data driver chips while maintaining the reduced device complexity of the tri-gate architecture.
2Device complexity
If the number of data driver chips is reduced, then cost is reduced, but the charging time of each row of pixels becomes insufficient, resulting in more obvious brightness difference
Solution Approach 1:
The patent applies parameter changes by adjusting the gray scale values dynamically for different display regions. By measuring the actual brightness output and calculating compensation values, the system modifies the gray scale parameters sent to each region to account for variations in charging time and signal attenuation. This allows the tri-gate architecture to maintain adequate effective charging time despite the increased distance between data driver chips.
3Device complexity
If the distance between data driver chips is increased, then device integration is improved, but signal attenuation difference increases, resulting in stronger boundary presence
Solution Approach 1:
The patent implements feedback by measuring the actual brightness output of each display region and using this information to calculate and apply appropriate gray scale compensation values. The system continuously monitors and adjusts the signal parameters to compensate for attenuation differences caused by increased distances between data driver chips, thereby maintaining signal transmission uniformity across the entire display while preserving the improved device integration.
Data Source
AI summary
The present disclosure provides display panels and compensation methods thereof, and devices for generating compensation grayscales. The compensation method includes: obtaining a first compensation grayscale of first subpixels included in a first display portion and a second compensation grayscale of second subpixels included in a second display portion corresponding to a first original grayscale, where the first compensation grayscale and the second compensation grayscale are respectively determined by a second brightness of the second subpixels and a first brightness of the first subpixels under the first original grayscale; and controlling a first part of the first subpixels and a first part of the second subpixels to emit light under the first original grayscale, controlling a second part of the first subpixels and a second part of the second subpixels to emit light respectively under the first compensation grayscale and the second compensation grayscale.