Pixel Uniformity Compensation Using Grouped Error Patterns
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Solution Overview
Problem
Electronic displays with self-emissive pixels exhibit non-uniform luminance characteristics between pixels, leading to visible image artifacts and reduced clarity, particularly at low luminance levels, and existing pixel uniformity compensation methods are memory and power-intensive.
Innovation Solution
Implementing pixel uniformity correction circuitry that compensates for non-uniform luminance characteristics by using pixel group error patterns, with lookup tables and scaling factors to adjust pixel luminance, reducing the need for one-to-one pixel compensation and minimizing memory and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If one-to-one pixel compensation is implemented, then luminance uniformity is improved, but memory size and power consumption increase significantly
Solution Approach 1:
The patent divides the display pixels into groups (e.g., 2x2 blocks) rather than compensating each pixel individually. This segmentation reduces the number of correction entries needed in memory from N (for N pixels) to N/4 (for N/4 groups), directly addressing the memory consumption issue while maintaining uniformity compensation effectiveness.
Solution Approach 2:
The patent merges multiple pixels into groups and applies a single correction factor to all pixels within each group. This combining approach reduces the total number of correction data entries required, thereby reducing memory requirements while still achieving acceptable luminance uniformity across the display.
2Manufacturing precision
If one-to-one pixel compensation is implemented, then luminance uniformity is improved, but power consumption increases significantly
Solution Approach 1:
By segmenting pixels into groups and using fewer correction entries, the system reduces the amount of data that needs to be processed and stored in memory during operation. This directly lowers the power consumption associated with reading and applying correction factors to each pixel.
Solution Approach 2:
Merging pixels into groups allows the system to use fewer correction entries, reducing the memory bandwidth and processing requirements. This results in lower power consumption while maintaining acceptable uniformity compensation performance.
3Quantity of substance
If group-based pixel compensation is implemented, then memory and power consumption are reduced, but luminance uniformity may be compromised
Solution Approach 1:
The patent applies different correction factors to different pixel groups based on their specific error patterns and locations. This local quality approach ensures that each group receives customized compensation tailored to its characteristics, maintaining high uniformity accuracy while using reduced memory resources compared to full per-pixel compensation.
Solution Approach 2:
The system dynamically selects appropriate correction factors based on the detected error patterns of each pixel group. This dynamic adaptation allows the system to optimize uniformity compensation for each group's specific needs, achieving high precision with reduced memory usage by only storing and applying necessary correction data.
Data Source
AI summary
An electronic display including a display panel that includes a plurality of display pixels having non-uniform luminance characteristics. The electronic display also includes pixel uniformity correction circuitry configured to compensate for the non-uniform luminance characteristics of the display pixels based on a pixel luminance correction factor selected based on pixel group luminance error patterns corresponding to locations of the display pixels.