Display Logo Region Gray-Level Correction for Pixel Degradation
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Solution Overview
Problem
Display device pixels degrade over time, especially when displaying high gray level images, leading to degradation and afterimage effects, particularly in logo regions.
Innovation Solution
A display device that includes a controller to detect logo regions and peripheral regions, calculate a correction gain based on average gray levels, and generate corrected image data to reduce pixel degradation and afterimage effects by adjusting the gray levels of these regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If high gray level images are displayed in logo regions, then display quality and visibility are improved, but pixel degradation and afterimage effects are exacerbated
Solution Approach 1:
The patent applies local quality by detecting logo regions and peripheral regions separately, then applying different correction gains to each region. The logo region receives a first correction gain while the peripheral region receives a second correction gain, allowing optimized gray level adjustment for each specific area to reduce degradation while maintaining display quality.
Solution Approach 2:
The patent changes the gray level parameter by calculating correction gains based on the average gray levels of logo and peripheral regions. The correction gain is applied to adjust the gray levels of pixels in these regions, thereby reducing pixel degradation and afterimage effects while maintaining visual quality.
2Reliability
If correction gain is applied to reduce pixel degradation, then reliability is improved, but grayscale banding may occur
Solution Approach 1:
The patent prevents grayscale banding by applying different correction gains to different regions. The logo region uses a first correction gain while the peripheral region uses a second correction gain, allowing localized optimization that maintains smooth gray level transitions and prevents banding artifacts.
Solution Approach 2:
The patent uses feedback by calculating correction gains based on the average gray levels detected in logo and peripheral regions. This feedback mechanism allows the system to dynamically adjust gray levels to reduce degradation while maintaining grayscale precision and preventing banding.
3Reliability
If logo region is detected and corrected separately, then pixel degradation is reduced, but device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the display area into logo regions and peripheral regions, then processing each region separately with appropriate correction gains. This segmentation approach reduces afterimage effects while the complexity is managed through automated region detection algorithms.
Data Source
AI summary
A display device includes a display panel, a controller, and a data driver. The display panel includes a plurality of pixels. The controller receives image data including data representing a logo, detects a logo region including the logo in the image data, determines a correction gain based on a quotient of a second gray level of a peripheral region adjacent to the logo region and a first gray level of the logo region, and generates corrected image data by correcting the image data based on the correction gain. The data driver provides data signals to the plurality of pixels based on the corrected image data.