Liquid Crystal Display Substrate Surface Texturing
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Solution Overview
Problem
Conventional liquid crystal display devices face issues with increased cost and thickness due to the use of functional polarizers, leading to surface reflection, glare, and static electricity, which compromise readability and contrast ratio.
Innovation Solution
A method involving the deposition of a transparent conductive layer, such as indium tin oxide (ITO), on the upper substrate of a liquid crystal panel, followed by an etching process to create irregular prominences and depressions, which diffusely reflects external light and scatters internal light, thereby improving readability and contrast ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a functional polarizer is used to reduce surface reflection and glare, then readability and contrast ratio are improved, but the thickness and production cost of the liquid crystal panel increase
Solution Approach 1:
The patent combines multiple functions (anti-reflection, anti-glare, and polarizing functions) into a single integrated polarizer structure, eliminating the need for separate functional polarizer layers and reducing overall panel thickness while maintaining readability improvements
Solution Approach 2:
The polarizer is designed to perform multiple functions simultaneously - it provides polarization, reduces surface reflection, and prevents glare all in one component, thereby improving readability without adding the thickness that would result from multiple separate functional layers
2Reliability
If a functional polarizer is used to reduce surface reflection and glare, then readability and contrast ratio are improved, but the production cost increases
Solution Approach 1:
The patent combines multiple functions (anti-reflection, anti-glare, and polarizing functions) into a single integrated polarizer structure, eliminating the need for separate functional polarizer layers and reducing overall panel thickness while maintaining readability improvements
Solution Approach 2:
The polarizer is designed to perform multiple functions simultaneously - it provides polarization, reduces surface reflection, and prevents glare all in one component, thereby improving readability without adding the thickness that would result from multiple separate functional layers
3Length of stationary object
If in-cell polarizers are used to reduce thickness, then the liquid crystal panel thickness is reduced, but surface reflection and glare problems occur
Solution Approach 1:
The patent applies anti-reflection and anti-glare treatments only to the outer surface of the polarizer that is exposed to the exterior, rather than treating the entire polarizer structure, thereby reducing surface reflection and glare while maintaining the thin profile of in-cell polarizers
4Length of stationary object
If in-cell polarizers are used to reduce thickness, then the liquid crystal panel thickness is reduced, but readability and contrast ratio deteriorate due to surface reflection and glare
Solution Approach 1:
The patent applies anti-reflection and anti-glare treatments only to the outer surface of the polarizer that is exposed to the exterior, rather than treating the entire polarizer structure, thereby reducing surface reflection and glare while maintaining the thin profile of in-cell polarizers
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 method effectively reduces specular reflection, enhances readability, and maintains transmissivity, while reducing the thickness of the liquid crystal panel and lowering production costs, thus improving the overall performance and competitiveness of the device.
Implementation Method 1
depositing a transparent conductive layer having a certain thickness on the upper substrate exposed to the exterior of the liquid crystal panel
Implementation Method 2
performing an etching process for removing the entire transparent conductive layer and a portion of the upper substrate to form irregular prominences and depressions
Implementation Method 3
capable of improving readability and contrast ratio by diffusely reflecting external light
Implementation Method 4
capable of improving readability and contrast ratio by diffusely reflecting external light and scattering internal light
Data Source
AI summary
Provided is a method of fabricating a liquid crystal display device. The method includes fabricating a liquid crystal panel divided into transmission and non-transmission regions, and including an upper substrate and a lower substrate, which are spaced apart from and opposite to each other, and a liquid crystal layer filled between the substrates, wherein the lower substrate has a plurality of thin film transistors; depositing a transparent conductive layer having a certain thickness on the upper substrate exposed to the exterior of the liquid crystal panel; and performing an etching process for removing the entire transparent conductive layer and a portion of the upper substrate to form irregular prominences and depressions on a surface of the upper substrate exposed to the exterior. Therefore, it is possible to improve readability and contrast ratio by diffusely reflecting external light and scattering internal light.