Circumference Wiring Patterns for UV Curing in LCD Sealing
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Solution Overview
Problem
In liquid crystal display devices, the presence of circumference wiring in the liquid crystal injecting mouth can obstruct light from curing the sealing material, leading to incomplete curing and contamination of the liquid crystal layer with impurities from the sealing material, resulting in uneven optical and electrical properties.
Innovation Solution
The circumference wiring is designed with specific patterns, including straight line portions, grid-like structures, and slits, to allow light to penetrate and cure the sealing material effectively, while maintaining electrical conductivity and minimizing resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If circumference wiring is located in the liquid crystal injecting mouth, then electrical conductivity and structural support are improved, but light curing of sealing material is blocked causing incomplete curing
Solution Approach 1:
The circumference wiring is divided into multiple wiring portions (first, second, third, fourth wiring portions) with different configurations. The first and third wiring portions extend in the first direction, the second wiring portion forms a grid pattern, and the fourth wiring portion extends in the second direction. This segmentation allows light to penetrate through gaps between wiring portions while maintaining electrical conductivity through the interconnected wiring structure.
Solution Approach 2:
Different portions of the circumference wiring have different structural characteristics optimized for specific functions. The grid-like second wiring portion provides high light transmission in certain areas while the linear portions provide electrical connectivity. This local differentiation allows simultaneous optimization of both electrical conductivity and light curing effectiveness in different regions of the injecting mouth.
2Strength
If circumference wiring is located in the liquid crystal injecting mouth, then structural support is improved, but contamination of liquid crystal layer with sealing material impurities occurs
Solution Approach 1:
The sealing material is cured completely before contacting the liquid crystal layer by ensuring adequate light penetration through the wiring structure. This preliminary curing action prevents the sealing material from releasing impurities that would otherwise contaminate the liquid crystal layer during subsequent assembly steps.
Solution Approach 2:
The wiring structure that initially appears harmful by blocking light is actually designed to benefit both electrical functionality and curing effectiveness. The multi-directional wiring portions create a pattern that allows light to reach the sealing material through gaps, converting the potential harm of light blocking into a beneficial structured approach that maintains both electrical conductivity and curing completeness.
3Reliability
If circumference wiring is located in the liquid crystal injecting mouth, then electrical functionality is improved, but display quality deteriorates due to alignment turbulence
Solution Approach 1:
By segmenting the wiring into multiple portions arranged in specific directions, the design maintains electrical functionality while creating gaps that allow uniform light distribution. This segmented structure prevents localized heating and curing issues that would cause alignment turbulence, thereby improving display quality.
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
This design ensures complete curing of the sealing material, preventing contamination of the liquid crystal layer and maintaining display quality by allowing light to reach the sealing material, even in narrow frame configurations.
Implementation Method 1
The seal material is formed of photosensitive resin, such as ultraviolet curing type resin. For this reason, when wirings are located in the liquid crystal injecting mouth, the radiated light to cure the sealing material may not reach to the sealing material because the radiated light is shaded by the wirings.
Data Source
AI summary
An array substrate includes a circumference wiring along with a periphery of an active area. A seal element is arranged surrounding the active area and forming a liquid crystal injecting mouth, and a seal material seals the liquid crystal injecting mouth. The circumference wiring is located in the liquid crystal injecting mouth and extends in a first direction. The circumference wiring includes a first wiring portion formed of a plurality of straight line portions, a second wiring portion in the shape of a grid formed of a plurality of straight line portions and a third wiring portion formed of a plurality of straight line portions. The respective straight line portions of the first, second and third wiring portions are connected along the first direction in the liquid crystal injecting mouth.