Curved Display Panel Engaging Structure for Cell Gap Uniformity
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Solution Overview
Problem
Conventional display panels face issues with maintaining uniform cell gap when curved, leading to non-uniform liquid crystal distribution and affected display quality due to relative movement between substrates.
Innovation Solution
Incorporation of a first engaging structure with a protruding portion on one substrate and a receiving portion on the other, allowing for mutual engagement to restrict relative movement and maintain uniform cell gap, even under external forces or curvature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional spacers are used to maintain cell gap, then the display panel can be assembled, but the cell gap uniformity deteriorates when the panel is curved due to relative substrate movement
Solution Approach 1:
The patent divides the substrate into multiple regions with different spacer heights, creating a multi-level spacer structure. The first spacers have a first height and the second spacers have a second height different from the first, allowing differential compensation for substrate deformation in different areas when curved
Solution Approach 2:
The patent changes the height parameter of spacers based on their position and function. By setting different heights for first spacers and second spacers, the system can maintain uniform cell gap under various conditions including curvature, as the varying heights compensate for the non-uniform deformation of the substrate
2Adaptability or versatility
If the display panel is curved to enable flexible display, then the adaptability is improved, but the liquid crystal distribution uniformity deteriorates due to spacer level changes
Solution Approach 1:
The patent employs spacers with different heights to maintain uniform cell gap when the display panel is curved. The first spacers and second spacers have different heights respectively, allowing the structure to adapt to curved configurations while preserving liquid crystal distribution uniformity through compensated geometric relationships
3Manufacturing precision
If spacers are disposed in peripheral areas to maintain cell gap, then the cell gap is maintained in flat state, but the spacers separate from substrates when curved causing cell gap non-uniformity
Solution Approach 1:
The patent segments the spacer system into first spacers and second spacers with different heights and positions. The first spacers are disposed in the first area and the second spacers in the second area, allowing each type to maintain reliable contact with substrates under different deformation conditions when the panel is curved
Solution Approach 2:
By setting different heights for spacers in different areas, the patent ensures that spacers maintain reliable contact with substrates even when the panel is curved. The height parameter is optimized for each spacer type to prevent separation while maintaining cell gap uniformity
Data Source
AI summary
A display panel includes a first substrate; a second substrate disposed opposite to the first substrate; a display medium disposed between the first substrate and the second substrate; and a first engaging structure including a first protruding portion and a first receiving portion. The first protruding portion is disposed on a first surface of the first substrate, and the first receiving portion is disposed on a second surface of the second substrate. The first receiving portion has a first opening to expose a portion of the second surface of the second substrate. At least a portion of the first protruding portion is disposed within the first opening of the first receiving portion. The first protruding portion and the portion of the second surface of the second substrate exposed from the first opening are spaced apart by a distance.