Conductive Structure with Light Reflection Reducing Layer for IPS Displays
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Solution Overview
Problem
In-plane switching liquid crystal display devices face challenges in achieving high image quality due to high light reflectance from pixel and common electrodes, which affects visibility and electric conductivity.
Innovation Solution
A conductive structure is developed comprising a substrate with a metal layer and a light reflection reducing layer made of oxides, nitrides, or oxynitrides of metals such as Al, Mo, Ti, Zr, Y, Si, Ag, Ni, Mn, Nb, Au, Cr, Co, Zn, and Cu, applied to reduce light reflectance and maintain electric conductivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a metal layer is used as an electrode in IPS mode liquid crystal display, then electric conductivity is improved, but light reflectance increases causing poor image quality
Solution Approach 1:
An organic compound layer is introduced as an intermediary between the metal layer and the liquid crystal layer. This intermediate layer has low light reflectance properties while maintaining electrical conductivity, thereby resolving the contradiction between high conductivity and low reflectance. The organic compound acts as a mediator that allows electrical function while optical function is improved.
Solution Approach 2:
The electrode structure uses a composite configuration combining metal layer and organic compound layer. The metal provides electrical conductivity while the organic compound provides low light reflectance. This composite structure achieves both requirements simultaneously rather than using a single material that would compromise one property for the other.
2Reliability
If light reflectance of pixel and common electrodes is increased to improve conductivity, then electric performance is improved, but image quality and visibility deteriorate
Solution Approach 1:
The organic compound layer serves as a mediator that decouples the relationship between electrical performance and optical visibility. It allows the metal layer to maintain high electrical performance while the organic layer controls the optical appearance by reducing light reflectance, thereby improving visibility.
3Ease of manufacture
If a conventional electrode structure is used in IPS mode, then manufacturing is simplified, but high image quality cannot be achieved due to light leakage
Solution Approach 1:
The organic compound layer is added as an intermediary between the metal electrode and the liquid crystal layer to prevent light leakage. This additional layer specifically addresses the light leakage problem in IPS mode without requiring fundamental changes to the manufacturing process, maintaining ease of manufacture while improving image quality.
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 conductive structure achieves low light reflectance and high visibility with minimal decrease in electric conductivity, even under varying environmental conditions, enhancing the performance of display devices.
Implementation Method 1
a light reflection reducing layer provided on at least one surface of the metal layer, in which the light reflection reducing layer includes an oxide, a nitride, or an oxynitride
Implementation Method 2
the light reflection reducing layer includes an oxide, a nitride, or an oxynitride of metals including one, or two or more of Al, Mo, Ti, Zr, Y, Si, Ag, Ni, Mn, Nb, Au, Cr and Co; Zn; and Cu
Data Source
AI summary
The present specification relates to a conductive structure, a method of manufacturing the same, and an electrode including the conductive structure.