Display Device Pixel Degradation Compensation for Consistent Luminance
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Solution Overview
Problem
Existing display devices suffer from pixel degradation over time, leading to reduced image quality and efficiency.
Innovation Solution
A display device equipped with a degradation compensator that calculates the degree of pixel degradation based on image data and generates compensated grayscale values using specific degradation curves for each pixel type, thereby compensating for luminance loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If display devices operate over time, then productivity and usage duration increase, but pixel degradation occurs leading to reduced image quality and luminance
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing degradation curves for different pixel types before actual display operation. The compensation values are computed in advance based on expected degradation patterns, allowing the system to proactively adjust grayscale values rather than reactively correcting degradation after it occurs. This enables long-term operation while maintaining image quality through pre-prepared compensation strategies.
2Reliability
If degradation compensation is implemented, then image quality and luminance consistency are maintained, but device complexity increases due to additional compensator components and calculation mechanisms
Solution Approach 1:
The patent applies segmentation by dividing the display panel into different pixel types (e.g., first, second, and third pixel types with different sub-pixel configurations). Each pixel type has its own dedicated degradation curve and compensation strategy. This segmentation allows the system to manage complexity through modular, type-specific compensation rather than requiring a single complex compensation mechanism for all pixels, reducing overall system complexity while maintaining accuracy.
3Illumination intensity
If pixel degradation is compensated through grayscale value adjustment, then luminance loss is recovered, but energy consumption increases due to additional calculations and compensation operations
Solution Approach 1:
The patent reduces energy consumption during actual display operation by performing compensation calculations in advance. The degradation curves and compensation values are pre-computed and stored, allowing the display controller to simply look up and apply pre-determined compensation values rather than performing complex real-time calculations for each pixel. This preliminary computation approach minimizes energy usage during operational phases while maintaining accurate luminance compensation.
Data Source
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AI summary
A display device includes a display part, a degradation compensator that generates a first compensated grayscale value by compensating for a first grayscale value corresponding to a first pixel, and generates a second compensated grayscale value by compensating for a second grayscale value corresponding to a second pixel, and a data driver that generates a first data signal based on the first compensated grayscale value to supply the first data signal to the first pixel, and generates a second data signal based on the second compensated grayscale value to supply the second data signal to the second pixel. A second degradation curve is defined by a first degradation coefficient corresponding to a first degradation curve, and a second degradation coefficient corresponding to a first estimated degradation curve for the light conversion particles of a second color calculated by applying the first degradation curve.