Image Correction Unit for Display Afterimage Prevention
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Solution Overview
Problem
Display devices such as OLEDs and LCDs experience pixel deterioration over time, leading to afterimages due to continuous output of specific images or characters, which accelerates pixel degradation.
Innovation Solution
Implementing an image correction unit that moves images on the display panel in a uniform period, reducing one region and enlarging another, with black data at the edges, to distribute image data evenly and prevent prolonged usage of specific pixels, thus reducing afterimage generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an image is continuously displayed on a specific region of the display panel, then the image can be clearly shown, but the pixels in that region deteriorate over time causing afterimages
Solution Approach 1:
The patent applies periodic action by moving the displayed image to different regions of the display panel in uniform periods. The image correction unit shifts the image position periodically, ensuring that no single pixel remains in the same display position continuously. This periodic movement distributes the display load across different pixel groups, preventing any specific pixel from deteriorating due to continuous usage, thereby eliminating afterimage formation while maintaining clear image display.
2Reliability
If the image is moved on the display panel to prevent pixel deterioration, then afterimage is reduced, but the image size and positioning may be distorted
Solution Approach 1:
The patent employs parameter changes by dynamically adjusting the image position parameters (X-axis and Y-axis shift amounts) while maintaining the image size parameter constant. The image correction unit calculates precise shift amounts and applies them periodically, ensuring that the image moves to different regions without changing its dimensions. This approach prevents afterimage formation through position variation while maintaining accurate image positioning and size, avoiding any distortion.
3Reliability
If the image size is changed to distribute data across regions, then pixel usage is balanced, but the original image dimensions are altered
Solution Approach 1:
The patent applies another dimension by introducing the time dimension to the image positioning problem. Instead of changing image size to distribute pixel usage, the system maintains the original image dimensions and distributes pixel usage by varying the image position in the spatial dimensions (X and Y axes) over time. The image correction unit shifts the image to different positions in the display panel across different time periods, achieving balanced pixel utilization while preserving the original image shape and size.
Data Source
AI summary
There is provided a method of displaying an image on a display device, the method including moving an image displayed at an image display region of the display device, and reducing a first region and enlarging a second region, the first and second regions included in the image, wherein the image has a smaller size than the image display region.