Movable Display Panel Reciprocating Motion Eliminates Screen Door Effect
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Solution Overview
Problem
Current VR devices suffer from a 'screen door effect' due to pixel size limitations, causing users to see pixel grids and affecting the display experience.
Innovation Solution
A display device with a moveable structure between the base substrate and display panel, which performs reciprocating motion with a preset cycle, allowing pixels to move into non-pixel areas, leveraging the visual persistence effect to eliminate the screen door effect and ensure timely image refreshment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the pixel size is reduced to improve display resolution, then the screen door effect becomes more noticeable, but the display quality deteriorates
Solution Approach 1:
The display panel is made movable through a moving structure that enables reciprocating motion between pixel areas and non-pixel areas. This dynamic approach allows the display to actively compensate for the screen door effect by periodically shifting pixel positions, transforming a static display limitation into a dynamically solvable problem.
Solution Approach 2:
The display panel performs reciprocating motion with a preset cycle that matches the image refresh rate. This periodic action ensures that pixels move into non-pixel areas and return to their original positions in synchronization with frame updates, creating the visual persistence effect that eliminates the screen door effect while maintaining image stability.
2Object-affected harmful factors
If a moveable structure is added to eliminate the screen door effect, then the display quality improves, but the device complexity increases
Solution Approach 1:
The moving structure is divided into independent components including a moving plate, supporting legs, and elastic components. This segmentation allows each component to perform its specific function independently, simplifying the overall design and making the complex motion mechanism more manageable and manufacturable.
Solution Approach 2:
The patent utilizes elastic deformation parameters of the supporting legs and elastic components to achieve the reciprocating motion. By changing the physical state from rigid to elastic, the system achieves smooth, controlled movement without complex mechanical linkages, reducing overall structural complexity.
3Object-affected harmful factors
If the display panel moves during refresh, then image crosstalk may occur, but the screen door effect is reduced
Solution Approach 1:
The motion of the display panel is synchronized with the image refresh cycle through feedback control. The reciprocating motion completes exactly one full cycle per refresh period, ensuring that pixels return to their original positions before the next frame is displayed, preventing image crosstalk while maintaining the screen door effect elimination.
Solution Approach 2:
The display panel performs preliminary reciprocating motion before the image is fully refreshed. By completing the pixel movement to non-pixel areas and back to original positions within the refresh cycle, the system prepares the display state in advance to avoid crosstalk while maintaining image stability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively reduces the screen door effect by ensuring non-pixel areas display the same content as pixel areas, improving display uniformity and preventing image crosstalk, thus enhancing the VR experience.
Implementation Method 1
the moveable structure includes a piezoelectric ceramic motor
Implementation Method 2
leveraging the visual persistence effect to eliminate the screen door effect
Data Source
AI summary
A display device includes a base substrate, a display panel, and a moveable structure located between the base substrate and the display panel, fixedly connected to the display panel and slidably connected to the base substrate; the display panel includes pixel areas and non-pixel areas between the pixel areas; in displaying phase, the moveable structure is configured to control the display panel to perform reciprocating motion with a preset cycle, the distance that the display panel moves in a single direction in the preset cycle is smaller than or equal to the width of a non-pixel area in the single direction, the preset cycle is the time required for the display panel to perform reciprocating motion once, and the time that the display panel moves in the single direction in the preset cycle is equal to the time that an image of the display panel is refreshed once.