In-cell OLED Touch Panel Black Matrix Integration
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Solution Overview
Problem
Conventional in-cell OLED touch display panels face challenges with increased thickness, weight, and manufacturing costs due to the need for additional touch sensing electrodes, which also reduce light penetration and aperture ratio.
Innovation Solution
An in-cell OLED touch display panel structure is designed with a black matrix layer composed of opaque conductor lines forming a single-layered touch pattern, eliminating the need for separate touch sensing electrodes on the substrates and using a color filter to generate primary colors, thereby simplifying the manufacturing process and enhancing light penetration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If separate touch sensing electrodes are added to the substrates, then touch sensing capability is improved, but thickness and weight of the panel increase
Solution Approach 1:
The patent combines the touch sensing electrode function with the existing black matrix layer structure. The opaque conductor lines that form the black matrix are configured to also serve as touch sensing electrodes, merging two separate functions into a single integrated structure. This eliminates the need for additional separate touch sensing electrode layers, thereby avoiding increased weight while maintaining touch sensing capability.
2Ease of operation
If separate touch sensing electrodes are added to the substrates, then touch sensing capability is improved, but manufacturing cost increases
Solution Approach 1:
The patent integrates the touch sensing electrode function into the black matrix layer, which is already part of the OLED display structure. By configuring the opaque conductor lines to serve dual purposes (black matrix and touch sensing electrode), the patent eliminates the need for additional separate electrode layers and their associated manufacturing processes, thereby reducing manufacturing complexity and cost.
Solution Approach 2:
The opaque conductor lines in the black matrix layer are designed to perform multiple functions: they serve as the black matrix for light blocking and as the touch sensing electrodes for detecting user input. This multi-functionality reduces the total number of components and manufacturing steps required, leading to lower production costs.
3Ease of operation
If separate touch sensing electrodes are added to the substrates, then touch sensing capability is improved, but light penetration rate decreases
Solution Approach 1:
The patent merges the touch sensing electrode function with the black matrix layer, which is positioned in the light path. By using the existing opaque conductor lines of the black matrix as the touch sensing electrodes, the patent avoids adding separate transparent conductive layers that would reduce light penetration. The touch sensing function is achieved without introducing additional light-blocking elements beyond what is already required for the black matrix.
4Ease of operation
If separate touch sensing electrodes are added to the substrates, then touch sensing capability is improved, but aperture ratio decreases
Solution Approach 1:
The patent combines the touch sensing electrode function with the black matrix layer structure. The opaque conductor lines forming the black matrix are configured to also serve as touch sensing electrodes, merging two separate functions into a single integrated structure. This eliminates the need for additional separate touch sensing electrode layers that would occupy additional area, thereby preserving the aperture ratio while maintaining touch sensing capability.
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 significantly reduces the thickness and weight of the OLED touch display panel, lowers manufacturing costs, and improves light penetration rates, resulting in a brighter and more cost-effective display.
Implementation Method 1
the electrons and electric holes enter the light-emitting layer 123 with fluorescent characteristics and then are combined to produce excited photons, which immediately release energy and return to the ground state. The released energy will generate different colors of light based on different luminescent materials
Implementation Method 2
The principle of the color filter method of OLED is the same with that of the full-color LCD display method, except that it just uses white OLED light and uses color filters to filter out red, blue, and green primary colors
Data Source
AI summary
An in-cell OLED touch display panel structure includes an upper substrate, a lower substrate, an OLED layer configured between the upper and lower substrates, and a black matrix layer. The black matrix layer is disposed at one surface of the upper substrate that faces the OLED layer, and the black matrix layer is composed of a plurality of opaque conductor lines. The plurality of opaque conductor lines is divided into a first group of opaque conductor lines, a second group of opaque conductor lines, and a third group of opaque conductor lines. The second group of opaque conductor lines is formed with N mesh-like polygonal regions. The opaque conductor lines in any one of the polygonal regions are electrically connected together, while any two polygonal regions are not connected, so as to form a single-layered touch sensing pattern on the black matrix layer.