OLED Touch Display Cross Network Electrode Integration
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Solution Overview
Problem
In-cell type touch control technology in prior art has a complicated structure and preparation process, making it difficult to achieve multi-point touch control effectively.
Innovation Solution
A touch control display device with a substrate and organic light-emitting diodes, where first and second electrodes form parallel conductive stripes insulated from each other, creating a cross network for integrated touch control, eliminating the need for a separate touch control component and simplifying the preparation process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of stationary object
If in-cell type touch control technology is used, then the display panel can be made lighter and thinner with higher light transmittance, but the structure becomes complicated and the preparation process becomes complex
Solution Approach 1:
The patent merges the touch control function with the OLED display structure by integrating the touch sensing electrodes directly into the OLED device architecture. The first and second electrodes of the OLED serve dual purposes: as charge transport electrodes for light emission and as sensing electrodes for touch detection, eliminating the need for separate touch control components and simplifying the overall structure.
Solution Approach 2:
The OLED electrodes are designed to perform multiple functions simultaneously. The first electrode (anode) and second electrode (cathode) not only facilitate electron and hole injection for light emission but also serve as the sensing electrodes for capacitive touch detection. This multi-functionality reduces the number of components needed in the display panel.
2Illumination intensity
If in-cell type touch control technology is used, then light transmittance is improved, but the preparation process becomes complicated
Solution Approach 1:
The patent combines the OLED fabrication process with the touch control electrode formation process. The same electrode layers (first and second electrodes) are formed during OLED manufacturing that also serve as touch sensing electrodes, eliminating the need for separate touch control layer deposition and patterning steps.
Solution Approach 2:
The touch control electrodes are formed preliminarily as part of the OLED electrode structure during the OLED fabrication process itself. By preparing the sensing electrodes at the same time as the OLED electrodes, the patent avoids subsequent complex processing steps that would be required if touch control layers were added separately.
3Adaptability or versatility
If separate touch control component is added, then touch control function is achieved, but the device structure becomes complicated and multi-point touch control becomes difficult
Solution Approach 1:
The patent integrates the touch control sensing function directly into the OLED device by using the OLED electrodes as sensing electrodes. The first and second electrodes form capacitive sensing elements that enable touch detection, eliminating the need for separate touch control components and enabling multi-point touch control through the inherent electrode architecture.
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 enables a compact structure with high light emitting efficiency and fast response speed, achieving multi-point touch control without a separate touch control component and simplifying the preparation method, reducing process costs.
Implementation Method 1
each of which including a first electrode, an organic material layer and a second electrode stacked in sequence
Data Source
AI summary
As in a touch control display device of the present invention, when second electrodes are formed, the second electrodes are connected in series respectively in the horizontal row direction and in the vertical column direction, so as to form a cross network with rows and columns insulated from one another, namely to form a touch control sensing layer. By integrating a touch control function into organic light-emitting diodes, a compact structure of the device is achieved, there is no need to set up a separate touch control component, the light emitting efficiency is high, and the respond speed is fast. As in a preparation method of the touch control display device of the present invention, second electrodes are formed into such a structure that the second electrodes are connected in series respectively in the horizontal row direction and in the vertical column direction, therefore, when organic light-emitting diodes are prepared, a touch control function can be integrated therein at the same time by means of technically mature photo-etching and etching techniques, which is a simple preparation method with low process cost.