Pixel Shifting for Display Degradation Control
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Solution Overview
Problem
High definition displays, particularly self-emitting types like OLED and LED, experience pixel degradation over time due to uneven color element wear, leading to luminance loss and color shifts, especially when a fixed overlay is consistently displayed, accelerating degradation.
Innovation Solution
An apparatus that shifts the video image by one or more pixels horizontally and vertically, utilizing an array of horizontal and vertical pixels with an image processing system to present a smaller visible display array, thereby distributing the load and retarding pixel degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed overlay is consistently displayed on the same pixels, then the overlay function is maintained, but pixel degradation accelerates causing luminance loss and color shifts
Solution Approach 1:
The patent implements dynamic pixel allocation where the overlay is shifted to different pixel locations in successive display frames. Instead of using fixed pixels for the overlay, the system dynamically changes which pixels display the overlay content, distributing the degradation burden across multiple pixels and maintaining overall display reliability.
Solution Approach 2:
The patent segments the overlay display function across multiple pixel groups. By dividing the overlay into different spatial segments that are displayed on different pixel sets at different times, the system prevents any single pixel group from experiencing continuous stress, thereby reducing degradation.
2Stability of the object's composition
If the same pixels are used continuously for overlay display, then the overlay remains stable, but pixel lifetime is reduced due to accelerated degradation
Solution Approach 1:
The patent applies periodic action by systematically shifting the overlay to different pixel locations in a cyclic manner. The overlay position is periodically changed across multiple frames, ensuring that no single pixel group remains in continuous use. This periodic redistribution extends pixel service lifetime while maintaining overlay functionality.
Solution Approach 2:
The system transitions from static pixel assignment to dynamic pixel allocation. The overlay is rendered on different pixel coordinates in successive frames, creating a dynamic distribution pattern that prevents any fixed pixel group from experiencing continuous degradation stress.
3Duration of action of moving object
If pixel array is shifted to distribute load, then pixel lifetime is extended, but visible display area is reduced
Solution Approach 1:
The patent resolves the area loss by utilizing the temporal dimension. Instead of permanently reducing the spatial display area, the system uses time-based pixel recycling where pixels are allocated to the overlay function at different times. This allows the full pixel array to remain available for different purposes across different frames, effectively eliminating the permanent area reduction.
Solution Approach 2:
The patent employs dynamic pixel allocation that adapts the display area usage based on frame timing. The overlay occupies different spatial regions in different frames, allowing the visible display area to be dynamically optimized. This temporal-multiplexed approach ensures that no pixels are permanently removed from the visible display area.
Data Source
AI summary
An apparatus includes a display and an image processing system. The display has an array of horizontal pixels and vertical pixels. The image processing system is configured to present an image on the display as a visible display array having a smaller size than the array and to shift the visible display array by at least one pixel.