OLED Luminance Compensation via Segmented Sub-Area Units
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Solution Overview
Problem
Existing luminance compensation methods for OLED display panels often result in uneven luminance due to voltage drops across power signal lines, leading to poor display quality, especially in areas with high impedance, and require excessive compensation coefficient data for effective correction.
Innovation Solution
The method divides the display area into sub-areas based on luminance abnormal texture density and types, with fewer pixel units in compensation units for areas with poorer quality and more uniform compensation in better quality areas, obtaining compensation coefficients to form a table for targeted luminance compensation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the display area is divided into uniform compensation units across all regions, then the compensation process is simple, but the luminance compensation effect is poor in areas with high impedance and luminance abnormalities
Solution Approach 1:
The display area is segmented into multiple sub-display areas based on impedance characteristics and luminance abnormality distributions. Each sub-display area is further divided into compensation units with pixel units arranged according to specific rules, allowing differentiated compensation strategies for different regions with varying impedance levels and luminance issues.
Solution Approach 2:
Different compensation unit configurations are applied to different sub-display areas based on their local characteristics. Areas with higher impedance and more luminance abnormalities use compensation units with fewer pixel units for fine-grained compensation, while areas with lower impedance use compensation units with more pixel units for broader uniformity, achieving locally optimized compensation quality.
2Manufacturing precision
If fine-grained compensation units are used across the entire display area, then the luminance compensation precision is improved, but the amount of compensation coefficient data required increases significantly
Solution Approach 1:
The display area is divided into sub-display areas with different impedance characteristics, and compensation units are configured differently in each sub-area. This segmentation allows the system to use fine-grained compensation only where necessary (high impedance areas) while using coarser compensation in low impedance areas, reducing the total number of compensation coefficients needed.
Solution Approach 2:
Instead of applying fine-grained compensation uniformly across the entire display area, the patent applies detailed compensation only to sub-display areas with high impedance and luminance abnormalities, while using simpler compensation for areas with better inherent uniformity. This partial application of fine-grained compensation reduces data requirements while maintaining effectiveness.
3Quantity of substance
If large compensation units are used for the entire display area, then the compensation data volume is reduced, but the luminance uniformity in areas with high impedance deteriorates
Solution Approach 1:
The display area is segmented into sub-display areas based on impedance characteristics. In sub-areas with high impedance and luminance abnormalities, compensation units are configured with fewer pixel units to achieve fine-grained compensation and maintain luminance uniformity. In sub-areas with lower impedance, larger compensation units are used to reduce data volume while maintaining acceptable uniformity.
Solution Approach 2:
The patent applies different compensation unit sizes to different local regions based on their specific needs. High impedance regions receive fine-grained compensation with smaller units, while low impedance regions receive coarse compensation with larger units, optimizing the balance between data volume and luminance uniformity for each local area.
4Manufacturing precision
If the compensation unit configuration is optimized for high impedance areas, then the luminance compensation effect in those areas is improved, but the overall processing complexity increases
Solution Approach 1:
The display area is divided into sub-display areas with clear boundaries based on impedance characteristics. Each sub-display area uses a consistent compensation unit configuration rule, which simplifies the overall system design compared to completely arbitrary configurations. The segmentation creates manageable regions with standardized compensation approaches.
Solution Approach 2:
The patent changes the parameter of compensation unit pixel unit count based on the impedance characteristics of different sub-display areas. By establishing clear rules for configuring compensation units according to impedance levels and luminance abnormality densities, the system manages complexity through parameterization rather than ad-hoc configurations.
Data Source
AI summary
A luminance compensation method for a display panel includes: dividing the display area into at least two sub-display areas including a first sub-display area and a second sub-display area, where a density of luminance abnormal textures in the first sub-display area is smaller than that in the second sub-display area, a number of types of the luminance abnormal textures in the first sub-display area is less than that in the second sub-display area; dividing the first sub-display area into a plurality of first compensation units, dividing the second sub-display area into at least one second compensation unit, where a total number of pixel units in each first compensation unit is greater than that in each second compensation unit; obtaining a compensation coefficient of each compensation unit and forming a compensation coefficient table; performing luminance compensation for the display panel according to the compensation coefficient table.