OLED Display Touch Integration via Ion Implantation
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Solution Overview
Problem
The integration of touch electrodes in display devices with organic light emitting diodes (OLEDs) leads to an increase in thickness, which is a challenge in maintaining the thin profile and aesthetic appeal of these devices.
Innovation Solution
A display device with an integrated touch screen is designed, where the touch sensing layer is formed using an ion implantation method, incorporating a first and second touch electrode and insulating film, which are coplanar, and the insulating film is disposed between the touch electrodes, minimizing the overall thickness and preventing moisture or oxygen permeation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If touch electrodes are integrated into the OLED display device, then touch sensing function is achieved, but the thickness of the display device increases
Solution Approach 1:
The touch sensing layer is merged with the encapsulation layer to form an integrated structure. The encapsulation layer serves dual functions: protecting the OLED from environmental factors (moisture, oxygen) and providing touch sensing capability through integrated touch electrodes and insulating films, thereby eliminating the need for separate touch screen layers that would increase thickness.
Solution Approach 2:
The encapsulation layer is designed to perform multiple functions simultaneously: it acts as both a protective barrier against moisture and oxygen, and as a touch sensing layer with integrated electrodes and insulating films. This multi-functionality reduces the overall device thickness by eliminating redundant layers.
2Adaptability or versatility
If multiple layers (touch electrodes, insulating films) are added for touch sensing, then touch sensing capability is improved, but the structural complexity and thickness increase
Solution Approach 1:
Multiple functional layers (encapsulation and touch sensing) are merged into a single integrated layer structure. The touch electrodes and insulating films are incorporated within the encapsulation layer itself, reducing structural complexity by eliminating the need for separate, stacked layers.
3Adaptability or versatility
If touch electrodes are formed on the encapsulation film, then touch sensing function is achieved, but the thickness and device complexity increase
Solution Approach 1:
The touch sensing components (electrodes, insulating films) are merged directly into the encapsulation layer structure rather than being placed on top of it. This integration ensures that the encapsulation layer serves dual purposes: environmental protection and touch sensing, thereby minimizing thickness increase.
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 effectively minimizes the thickness increase caused by touch electrodes while maintaining the protective and functional properties of the encapsulation film, ensuring the display device's thin profile and reliability.
Implementation Method 1
the touch sensing layer is formed using an ion implantation method
Data Source
AI summary
A display device with an integrated touch screen, the display device including a first substrate, a first electrode on the first substrate, an organic light emitting layer on the first electrode, a second electrode on the organic light emitting layer and an encapsulation film on the second electrode, wherein the encapsulation film includes: a first touch sensing layer with a first touch electrode and a first insulating film disposed at a first layer, an insulating film disposed on the first touch sensing layer and a second touch sensing layer with a second touch electrode and a second insulating film disposed at a second layer, wherein the second touch sensing layer is disposed on the insulating film, wherein the first insulating film is disposed between the first touch electrode and another neighboring first touch electrode, and is not disposed on the first touch electrode.