Flexible Display Supplementary Image Shifting for Boundary Quality
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Solution Overview
Problem
Flexible display devices, such as foldable or rollable displays, face challenges in maintaining image quality when deformed, particularly at the boundaries between display areas, leading to image quality deviations and afterimages due to static supplementary images displayed in non-exposed areas.
Innovation Solution
A display device and method that includes a processor generating image data for different display modes, with a supplementary image being displayed and shifted in a second display area, using image data from boundary pixel columns to minimize image quality deviations by ensuring all pixels emit light for a compensation time, and gradually changing luminance or color as the image moves away from the primary display area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a supplementary image is displayed statically in the second display area, then image quality compensation is achieved, but image quality deviations and afterimages occur at boundaries
Solution Approach 1:
The supplementary image is dynamically shifted across the second display area rather than remaining static. The image compensator moves the supplementary image to different positions in the second display area during the second mode, ensuring that pixels continuously emit light and preventing afterimage formation while maintaining image quality compensation at the boundary between first and second display areas
Solution Approach 2:
The image compensator generates supplementary image data in advance using image data from boundary pixel columns of the first display area. This preliminary generation of supplementary image data based on boundary characteristics allows the system to proactively compensate for potential image quality deviations before they occur, by pre-positioning appropriate image content in the second display area
2Reliability
If the supplementary image is shifted frequently, then afterimage is reduced, but power consumption increases
Solution Approach 1:
The image compensator shifts the supplementary image periodically across the second display area rather than continuously or statically. By implementing periodic shifting with appropriate timing, the system ensures that pixels emit light for sufficient duration to prevent afterimage while avoiding excessive power consumption from overly frequent shifts. The periodic action balances image quality maintenance with energy efficiency
Solution Approach 2:
The supplementary image is shifted only to the extent necessary to achieve image quality compensation and prevent afterimage. Rather than continuously moving the image or using excessive shifting frequency, the system applies partial action by shifting the supplementary image just enough to maintain boundary image quality while minimizing unnecessary power consumption from excessive shifting operations
Data Source
AI summary
A display device includes a display panel including a first display area and a second display area adjacent to the first display area, a processor configured to generate first image data corresponding to the first and second display areas for a first mode, and to generate second image data corresponding to the first display area for a second mode, and a display driver configured to drive the display panel in response to the first image data in the first mode, and to drive the display panel in response to the second image data in the second mode, wherein a supplementary image is displayed in at least a portion of the second display area in the second mode.