Touch Electrode Structure for OLED Emission Efficiency
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Solution Overview
Problem
Existing touch detection devices in organic light-emitting display devices face challenges in enhancing emission efficiency while maintaining touch detection performance, often requiring additional components like polarizing plates to reduce external light reflection, which increase fabrication costs and complexity.
Innovation Solution
A touch detection device with an improved structure featuring conductive metal and metal oxide electrodes, oxidized to form a mesh pattern that functions as both touch electrodes and a black matrix, eliminating the need for separate black matrices and polarizing plates by integrating them into the electrode design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a polarizing plate is added to reduce external light reflection, then reflection is reduced, but device complexity and fabrication cost increase
Solution Approach 1:
The patent merges the black matrix function and touch electrode function into a single integrated structure. The conductive metal electrode pattern serves dual purposes: as the black matrix for absorbing external light and reducing reflection, and as the touch detection electrode. This eliminates the need for separate polarizing plates while maintaining anti-reflection performance.
Solution Approach 2:
The conductive metal electrode is designed to perform multiple functions simultaneously: it acts as the black matrix for light absorption, serves as the touch sensing electrode, and provides electrical connectivity. This multi-functionality reduces the number of additional components needed, particularly eliminating the requirement for separate polarizing plates.
2Object-affected harmful factors
If a black matrix is added to reduce external light reflection, then reflection is reduced, but fabrication complexity increases
Solution Approach 1:
The patent combines the black matrix layer and touch electrode layer into a single conductive metal electrode structure. This integrated approach eliminates the need for separate black matrix fabrication processes and reduces the total number of fabrication steps while achieving both light absorption and touch detection functions.
Solution Approach 2:
The conductive metal electrode serves as both the black matrix and the touch electrode, performing dual functions with a single component. This universality simplifies the fabrication process by eliminating the need to manufacture and assemble separate black matrix and electrode components.
3Loss of energy
If touch electrode structure is improved to increase emission efficiency, then emission efficiency increases, but touch detection performance may be compromised
Solution Approach 1:
The patent employs different conductive metal materials with different properties in different regions of the electrode structure. ITO is used in regions requiring high transparency for emission, while other conductive metals are used in regions prioritizing touch detection sensitivity. This local differentiation optimizes both emission efficiency and touch detection performance in their respective zones.
Solution Approach 2:
The patent uses composite material structures combining different conductive materials (ITO and other conductive metals) to achieve optimal performance. The composite structure leverages the high transparency of ITO for emission areas and the excellent conductivity of other metals for touch detection areas, thereby maintaining both high emission efficiency and reliable touch detection.
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 enhances emission efficiency and simplifies the fabrication process by integrating touch electrodes and black matrix functions, reducing external light reflection without compromising touch detection performance.
Implementation Method 1
The metal oxide electrode is oxidized. the metal oxide electrode is blackened via to an oxidation process.
Data Source
AI summary
The present disclosure relates to a touch detection device that can increase the emission efficiency while maintaining touch detecting performance by improving the structure of touch electrodes. According to an embodiment of the disclosure, a touch detection device comprising a first touch insulating layer, a connection electrode disposed on the first touch insulating layer, a second touch insulating layer disposed on the connection electrode, a driving electrode disposed on a second touch insulating layer and connected to the connection electrode through at least one touch contact hole, and a sensing electrode disposed on the second touch and spaced apart from the driving electrode, wherein at least one of the driving electrode and the sensing electrode a conductive metal electrode and a metal oxide electrode which is oxidized.