Photo Spacer Repeating Pattern for Display Panel Pressure Resistance
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Solution Overview
Problem
Conventional photo spacer designs in liquid crystal display panels fail to uniformly disperse external pressure, leading to reduced pressure resistance and potential mura effects due to uneven pressure distribution and deformation of liquid crystal molecules.
Innovation Solution
The use of photo spacers arranged in a repeating pattern of regular polygons or circles between substrates in liquid crystal display panels, ensuring uniform pressure distribution and improved pressure resistance by maintaining consistent distances between central positions and adjacent spacers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional photo spacer designs are used, then the manufacturing process is simple, but the pressure resistance is reduced and pressure distribution is uneven
Solution Approach 1:
The photo spacers are segmented into different types (first photo spacers and second photo spacers) with different heights, arranged in a repeating unit pattern. This segmentation allows different regions to handle pressure differently, with the taller first photo spacers providing primary support and the shorter second photo spacers providing additional localized support, thereby improving overall pressure resistance while maintaining a systematic structure.
Solution Approach 2:
The patent applies local quality by creating regions with different photo spacer configurations. The repeating units with mixed first and second photo spacers are strategically placed to provide enhanced local pressure distribution in critical areas, while other areas use standard configurations. This allows the structure to optimize pressure resistance where needed without unnecessarily complicating the entire panel.
2Strength
If photo spacers are compressed to support the display panel, then pressure resistance is improved, but deformation of liquid crystal molecules occurs causing mura effects
Solution Approach 1:
The repeating unit pattern of photo spacers creates an equipotential distribution of support forces across the display panel. By arranging first and second photo spacers in a regular, repeating pattern, the pressure is distributed uniformly across all regions of the panel, preventing localized deformation of liquid crystal molecules that would cause mura effects. This ensures that no single area bears excessive pressure that could distort the liquid crystal alignment.
3Reliability
If external pressure is applied to the display panel, then the panel structure is tested for strength, but uneven pressure distribution causes deformation and mura effects
Solution Approach 1:
The photo spacer system is segmented into multiple height levels (first photo spacers and second photo spacers) arranged in repeating units. This segmentation allows the pressure to be distributed across multiple support points rather than concentrated at single locations, maintaining uniform liquid crystal molecule alignment even when external pressure is applied to the panel.
Solution Approach 2:
The patent changes the parameter of photo spacer height to create a multi-level support structure. By varying the height parameter between first and second photo spacers within repeating units, the system achieves better pressure distribution characteristics that maintain liquid crystal stability under external loading conditions.
Data Source
AI summary
The present disclosure provides a display panel and a display device. The display panel includes a first substrate, a second substrate located opposite to the first substrate, and a plurality of first photo spacers located between the first substrate and the second substrate. At least three of the first photo spacers define a repeating unit. The repeating unit comprises a first repeating unit arranged in a first shape, and the first shape comprises a regular polygon or a circle. The display may improve the pressure resistance of the display panel and prevent the mura effect of the display panel.