Curved Display Substrate Blocking Portion Air Bubble Control
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Solution Overview
Problem
In curved liquid crystal display devices, the deformation and offset of black matrices during substrate curvature lead to issues like color mixture, color cast, and light leak, while the formation of air bubbles in the liquid crystal layer due to the thickness difference in film layers complicates the seal oven process, affecting display quality.
Innovation Solution
A substrate with a blocking portion is designed on the base substrate, where the orthographic projection of this portion is within the opening area of the curved display panel, preventing air bubbles from moving and converging, and the strip-shaped black matrix is arranged to space pixels, thereby avoiding color-related issues and ensuring effective bubble prevention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the black matrix is deformed during curving, then the display can be curved, but color mixture and light leak occur
Solution Approach 1:
The blocking portion is formed in advance on the substrate before curving, positioned to preemptively block air bubble movement paths. This preliminary structural preparation prevents air bubble convergence during the curving process, thereby preventing color mixture and light leak without requiring post-curing adjustments.
Solution Approach 2:
The blocking portion acts as an intermediary element between the black matrix and the opening area. It serves as a mediator that intercepts and blocks air bubbles before they can reach the pixel regions, thus preventing the harmful effects of air bubble convergence on color accuracy while allowing the display to maintain its curved shape.
2Ease of manufacture
If air bubbles form in the liquid crystal layer, then the seal oven process can be completed, but display defects occur
Solution Approach 1:
The blocking portion extracts and isolates the air bubble problem from the pixel regions by creating a physical barrier. It separates the air bubble movement path from the opening areas, allowing air bubbles to be contained and managed during the seal oven process without affecting the display quality and pixel performance.
Solution Approach 2:
The blocking portion converts the potentially harmful presence of air bubbles during the seal oven process into a manageable feature. By providing a designated blocking structure, air bubbles are directed to specific areas away from pixel regions, transforming what would be a defect into a controlled element that does not compromise display quality.
3Reliability
If the blocking portion is positioned in the opening area, then air bubble movement is blocked, but aperture ratio decreases
Solution Approach 1:
The blocking portion applies local quality by being positioned specifically within the opening area rather than uniformly distributed. This localized placement targets the air bubble movement paths in the opening regions while minimizing impact on the overall aperture ratio, creating a differentiated structure that addresses air bubble control without sacrificing display area.
Data Source
Figure 1~3a
Figure 3b~3d
Figure 4
AI summary
Embodiments of the present disclosure relate to a substrate for a curved display panel, the curved display panel, and a curved display device. A substrate for a curved display panel is provided. The curved display panel includes a plurality of opening areas arranged in an array. The substrate includes a first base substrate which is curved; a strip-shaped black matrix positioned on the first base substrate and extending along a direction approximately parallel to a curved edge of the first base substrate; and a blocking portion positioned on the first base substrate. An orthographic projection of the blocking portion on the first base substrate is within an orthographic projection region of the opening area on the first base substrate.