Antistatic Polarizer for Liquid Crystal Displays
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Solution Overview
Problem
Liquid crystal displays face malfunctions and electrostatic stains due to static electricity, particularly in the IPS mode, where the formation of an ITO layer is costly and resource-intensive, and there is a need for an alternative antistatic solution that maintains physical and optical properties under high temperature and humidity conditions without using an ITO layer.
Innovation Solution
A polarizer with an antistatic layer formed on the protective films, combined with a conductive pressure sensitive adhesive layer, is directly attached to the liquid crystal panel, eliminating the need for an ITO layer and providing effective antistatic performance, endurance reliability, and optical characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an ITO layer is formed on the liquid crystal panel to prevent static electricity, then antistatic performance is improved, but production cost increases and resource consumption increases
Solution Approach 1:
The patent replaces the expensive ITO layer with a pressure-sensitive adhesive layer containing antistatic agents, which is a cheaper alternative material that achieves the same antistatic function without requiring costly vacuum deposition equipment
Solution Approach 2:
The patent changes the approach from forming a conductive oxide layer (ITO) to incorporating antistatic agents in the adhesive layer, fundamentally altering the method of achieving antistatic performance while reducing production costs
2Reliability
If an ITO layer is formed on the liquid crystal panel to prevent static electricity, then antistatic performance is improved, but resource consumption increases
Solution Approach 1:
The patent substitutes the resource-intensive ITO material with organic antistatic agents embedded in the adhesive layer, significantly reducing material resource consumption while maintaining antistatic functionality
Solution Approach 2:
The patent extracts the antistatic function from the ITO layer and relocates it to the pressure-sensitive adhesive layer, eliminating the need for ITO material and its associated resource consumption
3Ease of manufacture
If the polarizer is directly attached to the liquid crystal panel without an ITO layer, then production cost is reduced, but static electricity causes device malfunction
Solution Approach 1:
The patent introduces the pressure-sensitive adhesive layer as an intermediary between the polarizer and liquid crystal panel, which contains antistatic agents that prevent static electricity while enabling direct attachment without ITO
Solution Approach 2:
The patent merges the adhesive function and antistatic function into a single pressure-sensitive adhesive layer, eliminating the need for separate ITO layer while maintaining both attachment and static prevention capabilities
4Reliability
If an ITO layer is used for antistatic purposes, then device malfunction is prevented, but the structure becomes more complex
Solution Approach 1:
The patent combines multiple functions (adhesion and static prevention) into a single pressure-sensitive adhesive layer, simplifying the overall structure by eliminating the separate ITO layer and its associated deposition processes
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 prevents device malfunctions and electrostatic stains, ensuring excellent physical and optical properties under high temperature and humidity conditions, while reducing production costs by eliminating the need for ITO layers.
Implementation Method 1
an antistatic layer formed on the upper or bottom part of the protective film
Implementation Method 2
a pressure sensitive adhesive layer formed on the bottom part of the bottom protective film
Data Source
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AI summary
The present invention relates to a polarizer having an antistatic layer and a liquid crystal display. The present invention may provide a polarizer 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 glass substrate of a liquid crystal panel and a polarizer in a liquid crystal display for an antistatic purpose, and has excellent physical properties such as endurance reliability under high temperature or high humidity condition and optical characteristics, and a liquid crystal display thereof.