OLED Touch Display Barrier Layer Integration
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Solution Overview
Problem
The integration of touch-sensing capabilities with OLED displays is hindered by moisture and oxygen sensitivity, leading to performance degradation and thickness issues in conventional touch-sensing display apparatuses.
Innovation Solution
A touch-sensing display apparatus is designed with a touch structure that includes a sensing circuit layer and multiple water/oxygen barrier layers, integrated into the OLED display layer's passivation process to prevent moisture and oxygen exposure, while also serving as a protective layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the OLED and touch apparatus are formed on separate substrates and assembled with adhesives, then the OLED is protected from moisture and oxygen, but the integrated display thickness increases
Solution Approach 1:
The patent merges the OLED and touch apparatus onto a single substrate, eliminating the need for separate substrates and adhesive layers. The OLED layer structure integrates both the display function and touch sensing function, reducing the overall display thickness while maintaining protection from moisture and oxygen through the encapsulation structure.
Solution Approach 2:
The patent implements multi-functionality by making the OLED layer structure serve dual purposes: as the light-emitting display layer and as the touch sensing layer. The same encapsulation structure that protects the OLED from environmental factors also serves as the protective layer for the integrated touch apparatus, reducing the need for additional protective layers and minimizing thickness.
2Reliability
If conventional packaging methods are used to protect OLED from moisture and oxygen, then display quality is maintained, but the device complexity and manufacturing complexity increase
Solution Approach 1:
The patent combines the packaging/encapsulation function with the touch apparatus structure. The encapsulation layers that protect the OLED from moisture and oxygen are integrated with the touch sensing electrode layers, eliminating the need for separate packaging components and simplifying the manufacturing process while maintaining display quality.
Solution Approach 2:
The encapsulation structure performs multiple functions simultaneously: protecting the OLED from environmental degradation, serving as the touch sensing layer, and providing structural support for the integrated display. This multi-functionality reduces device complexity and streamlines the manufacturing process.
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 maintains the display quality of the OLED layer by blocking moisture and oxygen, reduces the thickness of the integrated display, and simplifies the manufacturing process, thereby addressing miniaturization and performance challenges.
Implementation Method 1
a first water/oxygen barrier layer is formed on the OLED display layer... a second water/oxygen barrier layer is formed on the sensing circuit layer
Data Source
AI summary
A touch-sensing display apparatus and a fabricating method thereof are provided. The touch-sensing display apparatus includes a substrate, an organic light emitting diode (OLED) display layer, and a touch structure. The OLED display layer is between the substrate and the touch structure apparatus and directly contacts with the touch structure. The touch structure includes a first water/oxygen barrier layer, an electromagnetic interference (EMI) shielding layer, a sensing circuit layer, and a second water/oxygen barrier layer. The first water/oxygen barrier layer is located on the OLED display layer. The EMI shielding layer is located on the first water/oxygen barrier layer. The sensing circuit layer is located on the EMI shielding layer. The second water/oxygen barrier layer is located on the sensing circuit layer.