OLED Display Grayscale Adjustment for Lifespan Extension
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Solution Overview
Problem
OLED display devices face issues of short life, high cost, and insufficient color purity, particularly due to decreased life at high temperatures, and existing methods to extend life compromise display quality.
Innovation Solution
A device and method for processing OLED display images by dividing the image into blocks, determining average grayscale values, identifying high grayscale blocks, calculating adjacent grayscale values, and adjusting pixel grayscale values based on these values to optimize brightness and temperature, considering the differences in luminous efficiency and light transmittance of color components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If the display brightness of the OLED display is regulated to increase life, then the lifespan of the OLED display device is improved, but the display quality of the display picture deteriorates
Solution Approach 1:
The display picture is divided into multiple blocks, and each block is processed independently to determine its average grayscale value. This segmentation allows for localized brightness adjustment rather than global dimming, preserving display quality in high-grayscale areas while reducing brightness in lower grayscale areas to extend OLED lifespan.
Solution Approach 2:
Different grayscale adjustment strategies are applied to different blocks based on their local characteristics. High grayscale blocks are identified and processed differently from other blocks, with adjacent block grayscale values considered to maintain smooth transitions. This local quality approach ensures that display quality is maintained where needed while extending lifespan where possible.
2Duration of action of stationary object
If grayscale values are adjusted to improve OLED lifespan, then the lifespan of the OLED display device is improved, but the brightness uniformity across the display deteriorates
Solution Approach 1:
The grayscale value of each block is adjusted based on feedback from its adjacent blocks. The adjustment coefficient for a given block depends on the grayscale values of neighboring blocks, creating a feedback mechanism that ensures smooth transitions and maintains brightness uniformity across the entire display while still implementing lifespan-extending grayscale reduction.
Solution Approach 2:
The grayscale adjustment is dynamic rather than static. The adjustment coefficient varies based on the grayscale values of adjacent blocks, allowing the system to adapt locally to maintain uniformity. This dynamic approach prevents abrupt transitions and maintains visual consistency across the display.
Data Source
AI summary
A device and a method for processing a waited display picture of an OLED display device are provided. The device includes a block dividing unit for dividing a waited display picture into multiple blocks; an average grayscale determining unit for determining an average grayscale value of each block; a high grayscale determining unit for determining a block having an average grayscale value greater than a preset threshold value as a high grayscale block; an adjacent grayscale determining unit for determining an adjacent grayscale value of each high grayscale block; and a regulation unit for adjusting grayscale values of pixels of each high grayscale block. The present invention adjusts grayscale values using a block as a unit. Besides, the difference of luminous efficiency or light transmittance of different color components is also considered so as to effectively improve the life of the OLED display device.