OLED Display Degradation Compensation by Color and Frequency
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Solution Overview
Problem
Organic light emitting display devices suffer from degradation of light emitting elements, which can lead to shortened lifespan and difficulty in normal image display.
Innovation Solution
A display device with a first memory to store degradation information, a second memory to store degradation compensation data, and a timing controller to compensate image data using this data, classifying compensation based on light emitting colors and frequencies of light emitting elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If organic light emitting elements are used in display devices, then the display device achieves thinner thickness, wider viewing angle, and faster response speed, but the organic light emitting elements degrade over time which shortens the device lifespan
Solution Approach 1:
The patent applies preliminary action by proactively measuring the luminance of light emitting elements and storing this information in memory before significant degradation occurs. The system continuously monitors and compiles luminance data over time, creating a database that tracks degradation trends. This preliminary measurement and storage of degradation information enables the system to anticipate and compensate for future degradation, thereby extending device lifespan while maintaining the inherent fast response speed of organic light emitting elements.
2Device complexity
If degradation compensation is performed without considering light emission colors and frequencies, then the compensation process is simpler, but the compensation effectiveness is reduced
Solution Approach 1:
The patent applies local quality by tailoring degradation compensation parameters specifically for each light emitting color (red, green, blue) and frequency range. Instead of using a universal compensation approach, the system divides the compensation data into color-specific and frequency-specific subsets, allowing each subset to be optimized for its particular degradation characteristics. This localized approach increases compensation effectiveness for each color and frequency while managing complexity through structured organization of compensation data.
Solution Approach 2:
The patent segments the degradation compensation process into distinct categories based on light emission colors and frequencies. The compensation data is divided into multiple subsets, with each subset corresponding to a specific color and frequency range. This segmentation allows the system to handle complex degradation patterns by breaking them down into manageable, color-specific and frequency-specific compensation tasks, thereby improving overall compensation effectiveness without overwhelming complexity.
3Device complexity
If degradation information is not stored and compensated, then the device structure is simpler, but image display quality deteriorates over time
Solution Approach 1:
The patent implements feedback by continuously measuring the actual luminance of light emitting elements and comparing it against expected performance values. The measured luminance data is stored in memory and used to generate compensation information that is fed back into the image processing pipeline. This feedback loop enables the system to dynamically adjust image data based on real-time degradation observations, maintaining high image display quality while using a relatively simple storage-based approach rather than complex active compensation hardware.
Data Source
AI summary
A display device according to an embodiment of the present disclosure may include a first memory configured to store degradation information; a second memory configured to store degradation compensation data; a timing controller configured to, when receiving image data from a host system, compensate the image data using the degradation compensation data; and a display panel including a plurality of light emitting elements, and configured to display an image according to compensated image data using at least some of the plurality of light emitting elements, wherein the degradation compensation data is classified on the basis of light emitting colors of the plurality of light emitting elements.