LCD Panel Spacer Arrangement for Mura Reduction
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Solution Overview
Problem
Conventional liquid crystal display (LCD) panels suffer from 'mura' or clouding defects due to non-uniform brightness and color distribution, caused by main photo spacers dislodging under external pressure, leading to alignment layer damage and pre-tilt angle shifts in the liquid crystal molecules.
Innovation Solution
The LCD panel design incorporates a staggered arrangement of main photo spacers within rectangular pixel arrays, with controlled contact areas between spacers and substrates, and varying spacer distributions to minimize perceived color non-uniformity, including positioning spacers adjacent to blue pixels and along diagonal lines, to enhance structural integrity and visual contrast sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If main photo spacers are arranged in a conventional uniform pattern, then manufacturing is simple, but mura defects occur due to spacer dislodgement and alignment layer damage
Solution Approach 1:
The patent applies asymmetry by arranging main photo spacers in irregular patterns rather than uniform grids. Specifically, spacers are positioned at different densities in different regions, with some areas having higher spacer concentrations and others having lower concentrations, creating an asymmetric distribution that prevents systematic alignment layer damage and reduces mura defects
Solution Approach 2:
The patent segments the display panel into multiple rectangular regions, each with independently optimized spacer arrangements. Within each region, spacers are distributed according to specific patterns that differ from adjacent regions, allowing localized optimization to prevent defect propagation across the entire display
2Strength
If main photo spacers are positioned to withstand external pressure, then structural integrity improves, but color non-uniformity increases due to alignment layer shifts
Solution Approach 1:
The patent applies local quality by varying spacer properties and positions according to local requirements. In regions prone to external pressure, spacers are positioned to provide structural support, while in regions sensitive to color uniformity, spacers are arranged to minimize alignment layer disturbance. Each local region has optimized spacer characteristics tailored to its specific functional requirements
3Manufacturing precision
If main photo spacers are arranged regularly, then manufacturing precision is high, but visual non-uniformity is perceptible to viewers
Solution Approach 1:
The patent deliberately introduces asymmetry in spacer arrangements to eliminate visually perceptible patterns. By avoiding regular, repeating spacer patterns, the design prevents moire effects and other visual artifacts that would be noticeable to viewers, while maintaining manufacturing precision through controlled irregular placement algorithms
Data Source
AI summary
The present disclosure relates to a liquid crystal display panel and a display device. The liquid crystal display panel includes a first substrate, a second substrate opposite to the first substrate, and a plurality of rectangular pixel inlays including at least two main photo spacers, the plurality of rectangular pixel arrays being disposed between the first substrate and the second substrate.