Afterimage Compensator Adaptive Shift Interval
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Solution Overview
Problem
Display devices, such as organic light emitting and liquid crystal displays, experience afterimages due to pixel deterioration from continuously displaying high-luminance fixed images, leading to accelerated degradation and image retention issues.
Innovation Solution
An afterimage compensator that adjusts the image shift interval and smoothing period based on image variation, using an image analyzer to determine the amount of change and an image shifter to adaptively adjust the shift interval and luminance transition, thereby reducing pixel deterioration and afterimage formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the image is shifted at a fixed interval to prevent afterimage, then afterimage formation is reduced, but the shift interval cannot be adaptively optimized for different image contents
Solution Approach 1:
The patent applies dynamics by making the shift interval variable rather than fixed. The image shifter adjusts the shift interval dynamically based on the amount of image variation detected by the image analyzer. When image variation is high, the shift interval is shortened; when image variation is low, the shift interval is extended. This dynamic adjustment optimizes afterimage prevention for different image contents while maintaining system reliability.
Solution Approach 2:
The patent changes the parameter of shift interval based on image variation characteristics. The system analyzes image data to determine the amount of variation and uses this information to adjust the shift interval parameter adaptively. This parameter change allows the system to optimize afterimage compensation for different types of images (e.g., static vs. dynamic content) without requiring manual configuration.
2Reliability
If the shift interval is shortened to improve afterimage compensation, then afterimage formation is reduced, but the processing load and power consumption increase
Solution Approach 1:
The patent optimizes power consumption by adaptively changing the shift interval parameter based on image variation. Instead of using a consistently short shift interval (which would maximize afterimage compensation but increase power consumption), the system extends the shift interval when image variation is low, thereby reducing the frequency of image shifting operations and lowering power consumption while maintaining adequate afterimage compensation.
Solution Approach 2:
The system uses feedback from the image analyzer to control the image shifter's operation. The image analyzer continuously monitors image variation and provides feedback that determines the appropriate shift interval. This feedback mechanism ensures that image shifting operations are performed only when necessary, optimizing the balance between afterimage compensation effectiveness and power consumption.
3Manufacturing precision
If the smoothing period is extended to improve image quality during shifting, then image quality is improved, but the response time for adapting to image variation decreases
Solution Approach 1:
The patent applies dynamics by making the smoothing period variable rather than fixed. The image shifter adjusts the smoothing period dynamically based on the amount of image variation. When image variation is high, the smoothing period is shortened to enable faster response; when image variation is low, the smoothing period is extended to maintain high image quality during shifting. This dynamic adjustment optimizes both image quality and response speed for different image contents.
Solution Approach 2:
The system changes the smoothing period parameter adaptively based on detected image variation characteristics. This parameter change allows the system to optimize the balance between image quality and response speed. By adjusting the smoothing period according to image content, the system can maintain high image quality during image shifting while responding quickly to changes in dynamic scenes.
Data Source
AI summary
An afterimage compensator and a display device having the same are disclosed, and the afterimage compensator includes an image analyzer configured to determine an amount of image variation based on a change of image data, and an image shifter configured to adjust a shift interval, which is an interval between time points at which an image is shifted, according to the amount of image variation.