Electroluminescent Display Compensation With Dynamic Pixel Block Boundaries
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Solution Overview
Problem
Electroluminescent displays experience luminance drop due to pixel degeneration caused by stress from driving currents, leading to degraded display quality.
Innovation Solution
Group pixels into blocks, accumulate block stress values, update block boundaries based on stress distribution, and correct input image data to reflect the degeneration state accurately.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If pixels are grouped into fixed blocks for stress compensation, then the compensation process is simplified, but the compensation accuracy deteriorates due to mismatch between fixed block boundaries and actual degeneration patterns
Solution Approach 1:
The patent implements dynamic block boundaries that adapt and move based on the accumulated stress distribution patterns. Instead of fixed block boundaries, the system recalculates and repositions block boundaries to align with actual degeneration regions, enabling the compensation structure to dynamically respond to changing stress patterns while maintaining compensation accuracy
Solution Approach 2:
The patent applies different compensation strategies to different regions by creating blocks with boundaries aligned to local stress patterns. Each block independently tracks its own stress accumulation, allowing localized compensation that matches the actual degeneration characteristics of each region rather than applying uniform compensation across the entire display
2Measurement precision
If block boundaries are frequently updated to match degeneration patterns, then compensation accuracy improves, but processing time and computational load increase
Solution Approach 1:
The patent performs preliminary grouping of pixels into blocks based on initial or previously determined boundaries before stress accumulation occurs. This pre-organization allows the system to efficiently track stress within predefined regions without requiring continuous recalculation of block structures during operation, reducing real-time processing demands while maintaining accurate stress tracking
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.