Electroluminescent Display Compensation Using Dynamic Pixel Blocks
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Electroluminescent displays, such as OLEDs, suffer from pixel degeneration due to stress from driving currents, leading to luminance drop and degraded display quality over time.
Innovation Solution
Grouping pixels into blocks, accumulating block stress values, and updating block boundaries based on these values to correct input image data, thereby compensating for pixel degeneration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If pixels are individually monitored and compensated for degeneration, then compensation accuracy is improved, but memory and data bandwidth requirements increase significantly
Solution Approach 1:
The patent divides the display panel into multiple pixel blocks, where each block contains multiple pixels. Instead of monitoring each pixel individually, the system monitors blocks of pixels together. This segmentation reduces the total number of monitoring units from N pixels to N/B blocks (where B is the block size), thereby reducing memory and data bandwidth requirements while still providing effective compensation for pixel degeneration within each block.
2Device complexity
If block boundaries are kept fixed, then processing complexity is reduced, but compensation accuracy deteriorates due to inability to reflect actual degeneration patterns
Solution Approach 1:
The patent implements dynamic block boundaries that can be adjusted based on the actual distribution of pixel degeneration. The system periodically updates the block boundaries to align with regions of similar degeneration characteristics, allowing the compensation algorithm to more accurately reflect the actual degeneration patterns across the display panel while maintaining manageable processing complexity through systematic boundary adjustment rules.
Data Source
AI summary
To compensate for degeneration of an electroluminescent display device, a method of compensating for the degeneration may include, grouping a plurality of pixels in a display panel into a plurality of pixel blocks arranged in present block rows and present block columns based on initial block boundaries, accumulating block stress values based on input image data, each accumulated block stress value representing a degeneration degree of the pixels included in each pixel block of the plurality of pixel blocks, performing a boundary updating operation on the plurality of pixel blocks, the performing the boundary updating operation including moving present block boundaries of the plurality of pixel blocks to updated block boundaries based on a distribution of the accumulated block stress values, and correcting the input image data based on the accumulated block stress values and the updated block boundaries.