Stretchable Display Substrate with Pre-Compensated Pixel Pitch
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Solution Overview
Problem
Flexible display devices experience a decrease in brightness uniformity and pixel density in stretchable regions due to differential deformation between non-stretchable and stretchable display areas, leading to non-uniform luminance.
Innovation Solution
A display substrate design with optimized pixel pitch and deformation compensation in stretchable regions, where the pitch between pixel units in the stretchable region is less than the reference pitch, and deformation amounts are pre-compensated to maintain uniform brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If pixels are removed from the non-stretchable display region to form the stretchable display region, then the display device gains stretchability and deformability, but the pixel density decreases and brightness uniformity is compromised when stretching occurs
Solution Approach 1:
The patent applies preliminary action by pre-compensating the pixel pitch in the stretchable display region before stretching occurs. The pixel pitch is designed to be smaller than the reference pitch in the non-stretchable region, anticipating the deformation that will occur during stretching. This preliminary adjustment ensures that after stretching, the pixel density becomes uniform across both regions, resolving the brightness uniformity issue while maintaining stretchability.
2Manufacturing precision
If the pixel pitch in the stretchable region is reduced below the reference pitch, then the pixel density uniformity is improved after stretching, but the manufacturing complexity increases
Solution Approach 1:
The patent applies local quality by implementing different pixel pitch values in different regions of the display. The non-stretchable display region maintains the reference pixel pitch, while the stretchable display region uses a smaller pixel pitch. This localized differentiation allows each region to be optimized for its specific function, achieving uniform pixel density after stretching while keeping the overall design manageable through clear regional differentiation.
Data Source
AI summary
A display substrate, a manufacturing method thereof, and a display device are provided. The display substrate includes: a non-stretchable display region and a stretchable display region. The stretchable display region includes multiple island regions in an array and separated from each other, and multiple bridge regions connecting adjacent island regions, a pixel unit is arranged on each of the island regions, the pixel unit includes at least one pixel, and a signal wire electrically connecting the pixels is arranged on each bridge region. A pixel pitch between the pixels in the pixel unit in a stretching direction is a reference pitch P0, a pitch between two adjacent pixel units in the stretching direction is a first pitch P1, and the first pitch P1 is less than the reference pitch P0.