OLED Regional Brightness Compensation for Pixel Burn-In
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Solution Overview
Problem
Existing OLED display technologies suffer from pixel burn-in issues due to prolonged exposure to static bright pixels, leading to reduced panel maximum luminance and compromised display quality, as current anti-burn-in solutions often attenuate 'good' pixels to match 'bad' pixels, thereby reducing overall brightness.
Innovation Solution
A regional anti-burn-in or anti-aging solution that selectively adjusts the luminance of pixels within specific areas of a frame, increasing brightness for pixels with high decay rates and reducing brightness for those with low decay rates, maintaining panel maximum brightness and average brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If current anti-burn-in solutions attenuate all pixels to match bad pixels, then pixel burn-in is reduced, but panel maximum luminance and average brightness are reduced
Solution Approach 1:
The patent divides the display panel into multiple regions and applies different luminance attenuation strategies to each region based on local pixel decay characteristics. Good pixels in regions with mostly good pixels maintain higher brightness, while bad pixels in regions with mostly bad pixels receive stronger compensation. This localized approach prevents uniform attenuation across the entire panel, thereby maintaining panel maximum luminance and average brightness while still addressing burn-in prevention.
Solution Approach 2:
The patent dynamically adjusts the attenuation parameter (alpha value) based on the decay ratio of pixels in different regions. Instead of using a fixed attenuation factor for all pixels, the system calculates region-specific alpha values that reflect the local pixel health status. This parameter adaptation allows the system to apply minimal attenuation to healthy regions while providing stronger compensation to degraded regions, thus preserving overall display brightness.
2Reliability
If current anti-burn-in solutions attenuate all pixels uniformly, then pixel decay is compensated, but display quality and visual experience are compromised
Solution Approach 1:
The patent implements region-specific compensation strategies where each region's pixel attenuation is determined by its local decay characteristics rather than a global uniform approach. This allows good pixels to maintain their original brightness and color accuracy, while bad pixels receive targeted compensation. The result is preserved display quality and natural visual experience in healthy regions while correcting issues in degraded regions.
Solution Approach 2:
The patent segments the display panel into multiple independent regions for separate analysis and compensation. By dividing the panel into region-based units and evaluating pixel decay independently in each region, the system can apply differentiated compensation strategies. This segmentation enables preservation of display quality in good regions while providing necessary compensation in bad regions, avoiding the quality degradation caused by uniform attenuation.
3Illumination intensity
If regional anti-burn-in solution is implemented, then processing complexity increases, but display performance is improved
Solution Approach 1:
The patent divides the display panel into a manageable number of regions, making the complex task of individual pixel analysis more tractable. By grouping pixels into regions and applying region-level attenuation factors, the system reduces computational complexity compared to processing each pixel independently, while still achieving the benefit of localized compensation strategies that preserve average brightness.
Data Source
AI summary
Aspects presented herein relate to methods and devices for display processing including an apparatus, e.g., a CPU. The apparatus may obtain an indication of at least one frame including a set of pixels, where the at least one frame is associated with at least one layer. The apparatus may also detect a first subset of pixels in the set of pixels included in the at least one frame, where each of the first subset of pixels includes a decay ratio that is less than a decay ratio threshold. Further, the apparatus may identify one or more regions of the at least one frame that include all of the first subset of pixels. The apparatus may also increase a brightness value of each of the first subset of pixels or decrease a brightness value of each of a second subset of pixels.