Conductive Adhesive Antistatic Layer for LCD
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Solution Overview
Problem
Liquid crystal displays face issues with device malfunction and electrostatic stains due to static electricity, particularly in the IPS-LCD, where the generation of static electricity is problematic during the attachment of polarizers, and the use of ITO layers is costly and resource-intensive.
Innovation Solution
A liquid crystal display with a conductive pressure sensitive adhesive layer directly formed on the upper substrate, providing a surface resistance of 9.9×10^9 Ω/□ or less, which prevents static electricity-induced malfunctions and stains without the need for an ITO layer, ensuring antistatic performance and maintaining physical and optical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an ITO layer is formed between the liquid crystal panel and the upper polarizer to prevent static electricity, then device malfunction and electrostatic stains are prevented, but manufacturing cost increases and resource consumption increases
Solution Approach 1:
The invention extracts the antistatic function from the ITO layer and transfers it to the pressure-sensitive adhesive layer. By forming a conductive pressure-sensitive adhesive layer with surface resistance of 10^9 Ω/□ or less directly on the liquid crystal panel, the patent eliminates the need for ITO layer while maintaining static electricity prevention capabilities
Solution Approach 2:
The pressure-sensitive adhesive layer is given multiple functions: it serves as both the bonding agent between the liquid crystal panel and upper polarizer, and as the antistatic layer. This multi-functional design replaces the separate ITO layer, reducing material consumption and manufacturing steps
2Reliability
If an ITO layer is formed to prevent static electricity, then device malfunction is prevented, but manufacturing complexity and process steps increase
Solution Approach 1:
The invention merges the bonding function and antistatic function into a single conductive pressure-sensitive adhesive layer. This consolidation eliminates the separate ITO layer and reduces the total number of manufacturing steps, simplifying the overall device structure and production process
3Loss of substance
If a conductive pressure sensitive adhesive layer is formed directly on the upper substrate to replace ITO layer, then manufacturing cost and resource consumption decrease, but maintaining appropriate surface resistance becomes challenging
Solution Approach 1:
The invention specifies a target surface resistance range of 10^9 Ω/□ or less for the conductive pressure-sensitive adhesive layer. By controlling the conductivity parameter of the adhesive material and optimizing its thickness, the patent achieves the required antistatic performance while using conventional adhesive formulation techniques
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 solution effectively prevents device malfunctions and electrostatic stains while maintaining excellent endurance reliability under high temperature and humidity conditions, and optical characteristics, even without the use of an ITO layer, thus addressing the challenges faced by conventional liquid crystal displays.
Implementation Method 1
a conductive pressure sensitive adhesive layer directly formed on the upper substrate of the liquid crystal panel, wherein said conductive pressure sensitive adhesive layer has a surface resistance of 9.9×10^9Ω/□ or less
Data Source
AI summary
The present invention relates to a liquid crystal display comprising a conductive pressure sensitive adhesive layer. The present invention may provide a liquid crystal display which may prevent malfunction of devices by static electricity generated in preparation or use procedures even without using the ITO layer conventionally formed between the upper substrate and a polarizer in a liquid crystal panel for an antistatic purpose, and has excellent physical properties such as endurance reliability under high temperature or high humidity condition and optical characteristics.