Display Stain Compensation Using Defect Pixel Classification
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Solution Overview
Problem
Existing display devices suffer from reliability issues due to stains and defects in pixels, which affect image quality and uniformity, and current compensation methods are inefficient and resource-intensive.
Innovation Solution
A stain compensating system and method that utilizes an inspection device to classify pixels into different defect categories, generating specific compensating values for each category using look-up tables to enhance image quality by selectively compensating for brightness and color defects in varying pixel units, optimizing resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a single compensating value is used for all defect pixels, then the compensation process is simple, but the image quality and uniformity deteriorate due to different defect characteristics
Solution Approach 1:
The patent segments defect pixels into multiple categories (first defect pixels and second defect pixels) based on their different defect characteristics. Different compensating values are generated for each category, allowing precise compensation tailored to specific defect types while maintaining manageable system complexity through structured classification.
Solution Approach 2:
The patent applies different compensating values to different defect pixel categories based on their local characteristics. First defect pixels receive first compensating values while second defect pixels receive second compensating values, ensuring that each region receives quality-appropriate compensation rather than a uniform approach.
2Reliability
If compensation is performed for all pixels uniformly, then comprehensive defect coverage is achieved, but computational time and memory requirements increase
Solution Approach 1:
The patent segments the pixel population into different defect categories and processes each segment with appropriate compensation strategies. This segmentation allows the system to focus computational resources on pixels that actually require compensation, reducing overall computational time and memory usage while maintaining comprehensive defect coverage.
Solution Approach 2:
The patent applies compensation selectively to different defect pixel categories rather than uniformly to all pixels. By identifying and compensating only for pixels with specific defect characteristics using category-specific compensating values, the system achieves effective defect coverage with reduced computational overhead compared to processing all pixels equally.
3Measurement precision
If detailed classification of defect pixels is performed, then compensation precision is improved, but device complexity and processing overhead increase
Solution Approach 1:
The inspection device segments defect pixels into distinct categories (first defect pixels and second defect pixels) based on their characteristics. This segmentation achieves precise defect classification by grouping pixels with similar defect properties, enabling targeted compensation while keeping the classification system manageable through clear categorical distinctions.
Data Source
AI summary
A system for compensating a stain in a display device including a display panel including pixels and a driving controller, an imaging unit, and an inspection device including a defect characteristic classifying unit, and a compensation data generating unit. The inspection device generates first measurement data and second measurement data. The inspection device compares second image data with compensation data that is based on the first and second measurement data, and the defect characteristic classifying unit classifies, as a first defect pixel or a second defect pixel a plurality of pixels, based on the first measurement data, the second measurement data, and the second image data. The compensation data generating unit generates a first compensating value for compensating for the first defect pixel in a first pixel unit, and a second compensating value for compensating for the second defect pixel in a second pixel unit different from the first unit.