LCD Spacer Elevating Layer Cross-Section Design
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Solution Overview
Problem
Liquid crystal displays (LCDs) experience moving mura due to spacer displacement between the color filter and array substrates, leading to reduced display quality and yield, as the spacers can misplace and fail to return to their initial position upon impact.
Innovation Solution
The implementation of elevating layers with a cross-sectional design featuring both laterally and longitudinally extending portions ensures that spacers remain in contact, preventing displacement and maintaining display quality, while a cross-shaped cross section simplifies production and adjusts contact area for consistent brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a rectangular elevating layer is used to support the spacer, then the spacer can be positioned initially, but the spacer may displace and move outside the elevating layer when the display is impacted, causing moving mura
Solution Approach 1:
The elevating layer transitions from a two-dimensional rectangular structure to a three-dimensional cross-shaped structure with extending portions in both lateral and longitudinal directions. This dimensional enhancement provides multi-directional support for the spacer, preventing displacement in any direction when impact occurs, thereby resolving the contradiction between initial positioning accuracy and position stability under impact.
Solution Approach 2:
The elevating layer is segmented into multiple extending portions (lateral and longitudinal) that independently support different sides of the spacer. This segmentation allows each portion to resist displacement forces independently, ensuring the spacer remains stable under impact while maintaining precise initial positioning.
2Reliability
If the elevating layer has a cross-shaped cross section with laterally and longitudinally extending portions, then the spacer remains stable and moving mura is reduced, but the device complexity increases
Solution Approach 1:
The elevating layer merges multiple functional portions (lateral extending portion and longitudinal extending portion) into a single integrated cross-shaped structure. This merging achieves stable spacer positioning in multiple directions simultaneously without requiring separate components, thus improving reliability while avoiding excessive device complexity.
Solution Approach 2:
The cross-shaped elevating layer serves multiple functions: it provides initial positioning support, prevents displacement in lateral directions, prevents displacement in longitudinal directions, and maintains spacer stability under impact. This multi-functionality achieves high reliability with a single unified structure rather than multiple separate components.
Data Source
AI summary
A liquid crystal display and a method for manufacturing the liquid crystal display are provided. The liquid crystal display comprises a first substrate and a second substrate that are spaced apart from each other, and spacers disposed between the first substrate and the second substrate and in contact with the first substrate and the second substrate. Elevating layers are disposed on the second substrate and in contact with the spacers, and each of the elevating layers is structured with a cross section including a laterally extending portion and a longitudinally extending portion. According to the present disclosure, the problem of moving mura of the liquid crystal display can be significantly alleviated.