OLED Display Afterimage Prevention via Movable Pixel Area
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
OLED displays suffer from afterimage phenomenon due to the drift of threshold voltage in TFTs, leading to permanent damage when displaying the same image for an extended period, which affects their service life.
Innovation Solution
An image display method that selects a partial area as a movable area and moves it in a specific pattern, intersecting directions, to avoid afterimage by periodically shifting pixels along defined paths, such as triangular or spiral tracks, to diffuse or shrink from the center, thereby reducing visual position deviation and preventing damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If the display continuously shows the same image for a long time, then the image display function is maintained, but afterimage phenomenon occurs and permanent damage results
Solution Approach 1:
The patent applies the dynamics principle by making the display image moveable instead of static. A movable area is defined that can shift position according to a preset moving track, changing the display position over time. This dynamic adjustment prevents prolonged exposure of the same pixel to the same image content, thereby reducing afterimage effects and extending the display's reliable operation duration.
Solution Approach 2:
The patent implements periodic action through the moving track mechanism, which guides the movable area to follow a predetermined path and return to its initial position after completing a cycle. This periodic movement pattern ensures that pixels are exposed to varying image positions over time, preventing cumulative damage from static image display while maintaining overall image integrity through cyclic repetition.
2Adaptability or versatility
If the display switches from one image to another, then new content is shown, but the previous image is partially retained causing afterimage
Solution Approach 1:
The movable area dynamically adjusts its position during image transitions, shifting along the preset moving track. This dynamic position change ensures that when switching between images, the pixel elements are not simply overwritten but gradually repositioned, reducing the retention of previous image content and minimizing afterimage effects while maintaining smooth image transitions.
3Duration of action of stationary object
If a still image is displayed for too long, then the display function is maintained, but severe afterimage occurs causing permanent damage
Solution Approach 1:
Even when displaying what appears to be a still image, the patent applies dynamics by continuously moving the movable area along the preset track. This creates effective motion within the displayed content, preventing the prolonged static exposure that causes severe afterimage and permanent pixel damage, thereby extending the safe display duration.
Solution Approach 2:
The periodic movement of the movable area along the closed-loop moving track ensures that even during extended display periods, the pixel elements are continuously repositioned. This periodic action prevents cumulative damage from prolonged still image display while maintaining the appearance of stable image presentation over extended durations.
Data Source
AI summary
An image display method, a storage medium, an image drive device and a display device are disclosed. The image display method, applicable to an image display device, includes: selecting at least a partial area in an image display area as a movable area; allowing the movable area to move M pixel step or steps from an initial position along a first direction; and allowing the movable area to move N pixel step or steps along a second direction. The first direction is intersected with the second direction, M1 and N1.