Transparent Conductive Resin Grounding for LCD Static Discharge
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Solution Overview
Problem
Existing liquid crystal display apparatuses using transverse electric field systems face issues with static electricity accumulation on the counter substrate, leading to display unevenness and interference from conductive frames and tapes, which hinder thinning and compactification while affecting display performance and assemblability.
Innovation Solution
A transverse-electric-field liquid crystal display apparatus with a transparent conductive resin portion on the counter substrate and an electrode connection to a ground wire on the printed circuit board, allowing charges to escape to ground without relying on a conductive frame, thus enabling thinning and frame narrowing without compromising contrast or assemblability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a transverse electric field system is used to improve display characteristics, then viewing angle and image quality are improved, but static electricity accumulates on the counter substrate causing display unevenness
Solution Approach 1:
A transparent conductive resin layer is introduced as an intermediary between the counter substrate and the external environment. This layer provides a discharge path for static electricity while maintaining optical transparency, thus preventing display unevenness without compromising display characteristics.
Solution Approach 2:
The patent replaces the traditional mechanical grounding system (conductive frames and tapes) with an integrated transparent conductive resin layer that provides both electrical grounding and optical functionality, eliminating the need for separate mechanical grounding components.
2Reliability
If a conductive frame and conductive tape are used to ground the counter substrate, then static electricity is discharged, but the structure becomes complex and thinning is hindered
Solution Approach 1:
The patent merges the grounding function with the existing liquid crystal panel structure by integrating the transparent conductive resin layer into the counter substrate. This combines multiple functions (grounding, optical transparency, structural integrity) into a single integrated component, eliminating the need for separate conductive frames and tapes.
Solution Approach 2:
The transparent conductive resin layer serves multiple functions simultaneously: it provides electrical grounding for static discharge, maintains optical transparency for display quality, and contributes to the structural integrity of the panel, enabling thinning without compromising any single function.
3Reliability
If a conductive frame is used to surround the antistatic layer, then charges can escape to ground, but the frame interferes with thinning and compactification
Solution Approach 1:
The patent extracts the grounding function from the external conductive frame structure and integrates it directly into the counter substrate through the transparent conductive resin layer. This eliminates the need for a separate surrounding frame, allowing for narrower frames and more compact designs while maintaining charge discharge capability.
4Weight of stationary object
If the liquid crystal panel is thinned and frame is narrowed, then compactification and weight reduction are achieved, but static electricity discharge becomes more difficult
Solution Approach 1:
The patent changes the electrical parameters of the liquid crystal panel by incorporating the transparent conductive resin layer with specific electrical conductivity properties. This enables effective static electricity discharge in a thinned panel structure by modifying the electrical characteristics rather than relying on external grounding components.
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 solution effectively prevents static-induced display unevenness, reduces interface reflection, and enhances assemblability by grounding the liquid crystal panel through the printed circuit board, allowing for thinner panels and narrower frames while maintaining high display performance.
Implementation Method 1
a transparent conductive resin portion is provided on a surface of a counter substrate... an electrode portion electrically connected to a ground wire... allowing charges to escape to ground
Implementation Method 2
In the transverse electric field system, liquid crystal molecules turn parallel to substrates when applied a voltage
Data Source
AI summary
A transverse-electric-field liquid crystal display apparatus includes a transparent conductive resin portion and an electrode portion. The transparent conductive resin portion is provided on a surface of a counter substrate of a liquid crystal panel. The electrode portion is provided on an electrode pad portion of the liquid crystal panel and electrically connected to the transparent conductive resin portion and also to a ground wire of a printed circuit board connected to the liquid crystal panel.