Liquid Crystal Panel Spacer Contact Density Optimization
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Solution Overview
Problem
Conventional liquid crystal display devices face image quality defects due to inadequate contact density between spacers and pads, leading to gravity Mura at high temperatures and bubble formation at low temperatures, as the support strength is either insufficient or excessive.
Innovation Solution
The liquid crystal panel features spacers on the opposite substrate corresponding to multiple pads with varying contact areas on the array substrate, allowing for adjustable contact density without altering the spacer mask plate structure, achieved through displacement or reversal processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the contact density between spacers and pads is increased to improve support strength, then bubble formation is prevented, but liquid crystal volume is reduced and gravity Mura occurs at high temperature
Solution Approach 1:
The patent applies local quality by making each spacer contact different numbers of pads (1, 2, or 3 pads) based on local requirements. This creates non-uniform contact density distribution across the substrate, allowing optimized support strength in different regions without uniformly increasing contact density everywhere, thus preventing both bubble formation and gravity Mura defects
Solution Approach 2:
The patent changes the contact density parameter by varying the number of pads contacted by each spacer. This parameter adjustment allows the system to adapt to different operational conditions (temperature, pressure) and achieve optimal performance without fixed uniform contact density, resolving the contradiction between support strength and image quality
2Reliability
If the contact density between spacers and pads is decreased to prevent bubble formation, then liquid crystal volume is maintained, but support strength becomes insufficient and gravity Mura occurs at high temperature
Solution Approach 1:
The patent uses local quality to distribute different contact densities to different spacers based on their specific requirements. Some spacers contact 1 pad (lower contact density) while others contact 3 pads (higher contact density), creating a customized contact density map that provides sufficient support strength where needed without causing bubble formation or gravity Mura
Solution Approach 2:
The patent segments the contact density configuration into distinct categories (1-pad contact, 2-pad contact, 3-pad contact) based on spacer position and requirements. This segmentation allows independent optimization of each region's contact density, achieving both adequate support strength and prevention of image quality defects
3Ease of manufacture
If uniform contact density is used across all spacers, then manufacturing is simplified, but image quality defects occur due to inability to adapt to different operational conditions
Solution Approach 1:
The patent transitions from uniform to non-uniform contact density by applying local quality principles. Each spacer is configured to contact a specific number of pads (1, 2, or 3) according to its local requirements, enabling adaptation to different operational conditions while maintaining manufacturability through a systematic approach
Data Source
AI summary
Embodiments of the invention provide a liquid crystal panel and a display device. The liquid crystal panel includes an array substrate, an opposite substrate and a liquid crystal layer provided between the array substrate and the opposite substrate. Spacers are arranged on the opposite substrate, pad are arranged on the array substrate, and each of the spacers corresponds to a plurality of pads and has different contact areas with the plurality of pads.