Liquid Crystal Display Spacer Load Distribution via Concavo-Convex Substrate
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Solution Overview
Problem
Existing liquid crystal display devices face issues with the second spacer breaking under excessive load and difficulty in adjusting the clearance between the second spacer and the substrate, leading to potential deformation and bubble formation due to uneven load distribution and shrinkage of the liquid crystal layer.
Innovation Solution
A liquid crystal display device with a concavo-convex portion on the second substrate corresponding to the second spacer, allowing elastic deformation and distribution of excessive load, preventing spacer breakage and facilitating clearance adjustment by varying the abutment area between the spacer and substrate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the second spacer is formed to be spaced apart from the second substrate, then the clearance adjustment between the second spacer and substrate is facilitated, but the second spacer is likely to undergo large load and break when excessive load is applied
Solution Approach 1:
The patent applies local quality by forming a concavo-convex portion at the specific location where the second spacer contacts the second substrate. This localized structural modification creates a convex portion that protrudes toward the spacer, providing enhanced load distribution precisely where needed without affecting other areas of the substrate or spacer.
Solution Approach 2:
The concavo-convex portion is formed in advance during substrate fabrication, creating a built-in cushioning structure that absorbs and distributes excessive load before it can concentrate on the second spacer. This preemptive design feature prevents spacer breakage by already having the load-distributing convex portion in place before any excessive loading occurs.
2Stability of the object's composition
If the second spacer is formed in abutment against the second substrate, then the load distribution is improved, but the clearance adjustment between the second spacer and substrate becomes difficult
Solution Approach 1:
Instead of forming the entire spacer surface in abutment, the patent applies local quality by creating a concavo-convex portion only at the contact region. This allows the second spacer to be spaced apart from most of the substrate while maintaining localized contact points through the convex portions, achieving both load distribution and clearance adjustment.
Solution Approach 2:
The contact interface between the second spacer and second substrate is segmented into multiple convex portions rather than a continuous abutment surface. This segmentation allows different regions to serve different functions: some convex portions provide load distribution while others maintain clearance, enabling both stability and adjustability.
3Stability of the object's composition
If the clearance between the second spacer and second substrate is reduced, then the load distribution is improved, but the liquid crystal layer shrinkage at low temperatures causes deformation and bubble formation
Solution Approach 1:
The patent applies local quality by forming concavo-convex portions only at specific contact regions rather than reducing clearance everywhere. This allows the liquid crystal layer to maintain adequate clearance in non-contact areas for thermal shrinkage accommodation, while still achieving load distribution through the localized convex portions.
Solution Approach 2:
The concavo-convex portions are formed in advance during substrate fabrication, creating a pre-configured load-distributing structure that maintains its geometry during thermal cycling. This preliminary structural preparation ensures that load distribution is maintained without requiring clearance reduction that would cause bubble formation during liquid crystal shrinkage.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Prevents second spacer breakage under excessive load and allows for easier adjustment of clearance between the second spacer and substrate, ensuring stable operation and preventing bubble formation during liquid crystal shrinkage.
Implementation Method 1
A liquid crystal display device with a concavo-convex portion on the second substrate corresponding to the second spacer, allowing elastic deformation and distribution of excessive load
Data Source
AI summary
A liquid crystal display device including: first and second substrates disposed oppositely to each other; a first spacer formed on a side of the first substrate so as to be directly or indirectly abutted against a side of the second substrate; and a second spacer formed on the first substrate side so as to be spaced apart from the second substrate side; wherein a concavo-convex portion is formed in an area, of the second substrate, corresponding to the second spacer on the first substrate side.