Liquid Crystal Device Electrostatic Shielding Adhesion
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Solution Overview
Problem
Liquid crystal devices with lateral electric field modes are prone to display irregularities due to external static electricity, and existing solutions face issues with adhesion and reliability at the bonding surface, leading to peeling and reduced reliability.
Innovation Solution
A liquid crystal device configuration with a loop-shaped sealing member, an electrostatic shielding layer on the counter substrate, and an insulating layer formed of resin materials, where the electrostatic shielding layer is electrically connected to the wirings via a conductive member, allowing static electricity to be discharged and preventing peeling at the bonding surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a transparent conductive film is formed on the inner side of the counter substrate to trap static electricity, then display irregularities are prevented, but adhesion is poor between the conductive film and sealing portion causing peeling and reduced reliability
Solution Approach 1:
The patent introduces an intermediary layer between the transparent conductive film and the sealing portion to improve adhesion. This intermediary acts as a mediator that bonds both the conductive film and the sealing resin, preventing peeling while maintaining the static electricity trapping function. The intermediary layer resolves the adhesion problem between metal oxides and curable resin.
Solution Approach 2:
The patent employs composite material structure by combining transparent conductive film, intermediary adhesion layer, and sealing resin in a multi-layer configuration. This composite approach allows each layer to perform its specific function while collectively solving the adhesion and reliability issues.
2Ease of manufacture
If the transparent conductive film is formed on the inner side of the counter substrate, then manufacturing is easier without reversing the glass substrate, but the conductive film cannot be properly bonded to common electrodes
Solution Approach 1:
The intermediary layer serves as a mediator that enables both mechanical bonding and electrical connection between the transparent conductive film and the common electrodes through the sealing portion. This resolves the conflict between ease of manufacture and connection reliability.
3Strength
If the surface of the conductive film is covered with materials showing good adhesion with the sealing portion, then peeling is prevented, but the vertical electrical connection between the conductive film and common electrodes cannot be realized
Solution Approach 1:
The intermediary layer is specifically designed to provide both adhesion to the sealing portion and electrical conductivity to the common electrodes. This dual-function intermediary resolves the contradiction between preventing peeling and maintaining electrical connection.
Solution Approach 2:
The intermediary layer uses composite material properties combining adhesion characteristics and electrical conductivity, allowing it to simultaneously bond the sealing portion and conduct electricity to the common electrodes.
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
The configuration enhances the damage resistance and reliability of the liquid crystal device, effectively suppressing image irregularities caused by static electricity and ensuring high-quality display.
Implementation Method 1
an electrostatic shielding layer and an insulating layer formed of resin materials are formed, wherein the wirings and the electrostatic shielding layer are electrically connected via a conductive member
Data Source
AI summary
A lateral electric field mode liquid crystal device comprising: a first substrate having pixel electrodes and common electrodes which are provided on one surface thereof; a second substrate disposed so as to face that surface of the first substrate with a predetermined distance therebetween; a liquid crystal layer sandwiched between the first substrate and the second substrate; and a loop-shaped sealing member disposed so as to surround the liquid crystal layer, with the liquid crystal device driving the liquid crystal layer by an electric field generated between the pixel electrodes and the common electrodes.