Curved Display Panel Spacer Density Gradient for Pressure Uniformity
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Solution Overview
Problem
Curved display panels experience uneven pressure distribution during bending, leading to optical path differences and yellowish color distortions at the peripheral areas due to excessive pressure on the center, causing display quality issues.
Innovation Solution
The arrangement density of spacers is gradually reduced from the center to the non-curved edges, and pillow pads with increasing heights are used to balance the compression ratios, while a black matrix frame is disposed on the outer periphery to reduce light leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the display panel is bent to form a curved display panel, then the display panel can adapt to curvature for better visual effect, but the center area is subjected to large pressing force causing uneven gap and color distortion
Solution Approach 1:
The patent applies local quality by varying the spacer arrangement density across different regions of the display panel. Specifically, the spacer density is reduced from the center area toward the peripheral areas, creating non-uniform spacer distribution that compensates for the uneven pressing forces during bending. This local variation in spacer density ensures more uniform gap maintenance across the curved display surface.
Solution Approach 2:
The patent changes the parameter of spacer arrangement density from a uniform distribution to a gradient distribution. By adjusting the spacer density parameter spatially (higher at center, lower at periphery), the system compensates for the differential pressing forces experienced during bending, thereby maintaining more consistent gap dimensions across the curved display panel.
2Force
If the center area is subjected to large pressing force during bending, then the gap between substrates is smaller at center, but the optical path difference increases and color temperature changes at peripheral areas
Solution Approach 1:
The patent implements local quality by creating region-specific spacer density zones. The center area has higher spacer density to handle the concentrated pressing forces, while peripheral areas have lower spacer density to prevent over-compression. This localized differentiation in spacer properties ensures that each region of the display panel is appropriately supported according to the local mechanical stresses during bending.
3Ease of manufacture
If uniform spacer arrangement is used, then the manufacturing process is simple, but the yellowish color distortion occurs at peripheral areas due to excessive pressure
Solution Approach 1:
The patent applies local quality by implementing spatially varying spacer density rather than uniform spacer arrangement. The spacer density is configured to be higher in the center region and gradually reduce toward the periphery, creating localized differences in mechanical support that compensate for the non-uniform stress distribution during bending and prevent color distortion.
Data Source
AI summary
A curved display panel includes a first substrate and a second substrate that are opposite to each other, a liquid crystal layer disposed in a gap between the first substrate and the second substrate, wherein the first substrate is provided with spacers for supporting the first substrate and the second substrate to form the gap, and arrangement densities of the spacers are gradually reduced from the center of the curved display panel to either side of non-curved edges of the curved display panel.