OLED Burn-In Prevention via Stationary Pixel Luminance Reduction
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Solution Overview
Problem
OLED displays suffer from burn-in, a non-uniform pixel deterioration that leads to image ghosting and reduced lifespan, primarily caused by stationary pixels, which existing technologies have not effectively addressed.
Innovation Solution
A computer-implemented method that includes receiving region information from a stationary region detection process, performing a flat region ghosting artifact removal process, and utilizing a region-based luminance reduction process with a flat region indicator to prevent burn-in, incorporating both global and local flat region detection processes for accurate luminance adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If luminance reduction is applied to stationary regions to prevent burn-in, then OLED lifespan is extended, but ghosting artifacts appear in flat regions
Solution Approach 1:
The patent applies different luminance reduction strategies to different types of stationary regions. Flat stationary regions (uniform color/亮度) have luminance reduced more aggressively to prevent burn-in, while non-flat stationary regions (with texture or variation) maintain higher luminance to avoid visible ghosting artifacts. This localized differentiation resolves the contradiction by tailoring the burn-in prevention intensity to the specific visual characteristics of each region.
Solution Approach 2:
The system dynamically adjusts luminance reduction parameters based on real-time analysis of stationary region characteristics. The flat region detection process continuously evaluates whether a stationary region is flat or non-flat, and the luminance reduction amount is dynamically modified accordingly. This dynamic adaptation allows the system to maximize burn-in prevention while minimizing ghosting artifacts.
2Reliability
If aggressive luminance reduction is applied to all stationary regions, then burn-in is prevented, but visual quality deteriorates due to visible ghosting
Solution Approach 1:
The patent implements local quality differentiation by identifying flat stationary regions and applying selective luminance reduction only to those regions, while preserving luminance in non-flat stationary regions. This selective approach prevents burn-in in vulnerable flat areas without causing visible ghosting artifacts in textured or varied regions, thereby maintaining overall visual quality.
Solution Approach 2:
The system incorporates a feedback mechanism where the flat region detection process continuously monitors stationary regions and provides information to the luminance reduction process. Based on this feedback about whether a region is flat or non-flat, the luminance reduction amount is automatically adjusted, creating a closed-loop control system that balances burn-in prevention with visual quality preservation.
3Object-generated harmful factors
If no luminance reduction is applied, then visual quality is maintained, but burn-in occurs rapidly reducing OLED lifespan
Solution Approach 1:
The patent applies luminance reduction selectively to flat stationary regions where burn-in is most problematic and least visually noticeable, while maintaining normal luminance in non-flat regions where visual quality is more sensitive. This localized approach extends OLED lifespan by preventing burn-in in critical areas without sacrificing overall visual quality.
Solution Approach 2:
The flat region detection process provides continuous feedback to the luminance reduction process, enabling dynamic adjustment of luminance levels based on the characteristics of each stationary region. This feedback-driven approach ensures luminance reduction is applied only where necessary for burn-in prevention, maintaining visual quality in regions where it matters most.
Data Source
AI summary
One embodiment provides a computer-implemented method that includes receiving region information from a stationary region detection process for a video. A processor performs a flat region ghosting artifact removal process that updates the region information with a flat region indicator utilizing the region information and the video. The processor further performs a region based luminance reduction process utilizing the updated region information with the flat region indicator for display ghosting artifact removal and burn-in protection.