Adaptive Pixel Scanning for Display Aging Compensation
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Solution Overview
Problem
Existing display panel systems face inefficiencies in compensating for aging pixels due to lengthy full-panel scans, which are exacerbated by fast-aging phenomena and thermal effects, leading to unacceptably long compensation times.
Innovation Solution
An adaptive feedback system that prioritizes and efficiently measures pixels with high probabilities of change by directing measurements towards areas with significant deviations from reference values, using a method that organizes pixels into clusters and adjusts absolute aging values based on priority, allowing for faster compensation and estimation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a full-panel scan is performed to measure all pixels for aging compensation, then measurement completeness is improved, but compensation time becomes excessively long (over 11 hours)
Solution Approach 1:
The patent divides the full panel into multiple blocks, each containing multiple pixels. Instead of scanning all pixels sequentially across the entire panel, the system measures only a subset of pixels in each block during each scanning cycle. This segmentation allows the system to achieve adequate measurement coverage over time without requiring a complete full-panel scan, thereby reducing the compensation time from over 11 hours to a much shorter duration while maintaining sufficient measurement precision for effective aging compensation.
2Speed
If all pixels are measured simultaneously in each frame, then measurement speed is improved, but the system complexity and resource requirements increase significantly
Solution Approach 1:
The patent implements partial measurement by selecting only a subset of pixels from each block for measurement in each frame, rather than measuring all pixels simultaneously. This partial action approach reduces the immediate measurement burden on the system, lowering complexity requirements for measurement circuits and control logic. The system achieves adequate compensation by performing measurements at this reduced scale across multiple frames, avoiding the need for complex simultaneous full-panel measurement infrastructure while maintaining effective compensation speed.
3Measurement precision
If measurements are performed frequently across the entire panel, then aging detection accuracy is improved, but energy consumption and thermal effects increase
Solution Approach 1:
The patent applies local measurement strategies by focusing measurement efforts on specific blocks and subsets of pixels within each block rather than uniformly measuring the entire panel. This local quality approach concentrates measurement activity in manageable regions, reducing the total energy consumption associated with frequent full-panel measurements. By performing measurements only on selected pixels within each block, the system maintains sufficient aging detection accuracy for effective compensation while significantly lowering overall energy consumption and associated thermal effects compared to frequent comprehensive panel scanning.
Data Source
AI summary
A local priority-based scanning scheme that focuses scanning to areas of a display panel whose measured characteristics are under continuous change (e.g., aging or relaxation). The algorithm identifies areas or regions needing compensation, using a current measurement from a single pixel in an area as a candidate to determine whether the rest of the region needs further compensation. The algorithm thus detects newly changed areas quickly, focusing time-consuming measurements on those areas that need high attention. Optionally, neighboring pixels sharing the same state (e.g., aging or overcompensated) as the measured pixel can be adjusted automatically given the likelihood that the neighboring pixels will also require compensation if the measured pixel needs compensation.