Display Pixel Degradation Sensor Spatial Resolution Compensation
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Solution Overview
Problem
Conventional organic light emitting display devices face challenges in accurately measuring pixel degradation, particularly in low gray level regions, due to low signal-to-noise ratio and decreased spatial resolution, which affects the reliability of sensing data.
Innovation Solution
A display device with a degradation sensor and calculator that measures and calculates pixel degradation data using accumulated input data, predicted pixel degradation data, and measured block degradation data, analyzing correlations to restore spatial resolution and improve accuracy through compensation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pixel block sensing is used to improve reliability of sensing data in low gray level region, then reliability is improved, but spatial resolution decreases
Solution Approach 1:
The sensing process is segmented into two distinct stages: block-level sensing for reliability and pixel-level calculation for spatial resolution. The display panel is divided into pixel blocks that share common sensing electrodes, allowing simultaneous block-level measurement while maintaining individual pixel degradation calculation through the degradation calculator
Solution Approach 2:
The patent transitions from a single-dimension sensing approach (either pixel-level or block-level) to a multi-dimensional approach by combining block-level sensing data with pixel-level input data accumulation. The degradation calculator operates in a higher dimensional space, integrating both block degradation information and individual pixel usage patterns to produce pixel-level degradation data
2Measurement precision
If pixel-level sensing is used to maintain spatial resolution, then spatial resolution is maintained, but reliability of sensing data decreases in low gray level region
Solution Approach 1:
The patent merges block-level sensing (which provides reliable data) with pixel-level input data tracking (which maintains spatial resolution). The degradation calculator combines the measured block degradation data with accumulated pixel input data to calculate individual pixel degradation, effectively merging the advantages of both approaches
3Reliability
If more pixels are included in pixel block to improve sensing reliability, then reliability is improved, but spatial resolution of sensing data decreases in reverse proportion
Solution Approach 1:
The patent segments the sensing and processing functions: block-level sensing provides reliable aggregate data, while pixel-level degradation calculation restores fine-grained spatial resolution. This segmentation allows the system to benefit from both block-level reliability and pixel-level precision without the direct trade-off
Data Source
AI summary
A display device includes a display panel including a pixel block that includes pixels, a degradation sensor for measuring degradation information of the pixel block, and a degradation calculator for accumulating input data provided to each of the pixels and for calculating pixel degradation data of each of the pixels based on accumulated input data and the degradation information.