Integrated Touch Panel and OLED Barrier Structure
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Solution Overview
Problem
The integration of touch-sensing displays with OLEDs faces challenges due to moisture and oxygen sensitivity, leading to performance decay and thickness issues in conventional packaging methods.
Innovation Solution
A touch-sensing display apparatus with a touch panel that serves as both a touch-sensing interface and a water/oxygen barrier, using a flexible or glass substrate with integrated sensing circuits and barrier layers, and an adhesive layer to package an environmentally sensitive electronic device, such as an OLED, thereby reducing water/oxygen vapor transmission rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional packaging methods are used to protect OLED from moisture and oxygen, then device reliability is improved, but device thickness increases
Solution Approach 1:
The patent combines the packaging function with the touch panel structure by integrating water/oxygen barrier layers directly into the touch panel assembly. The touch panel and packaging structure are merged into a single integrated component, eliminating the need for separate packaging layers and reducing overall device thickness while maintaining protection against moisture and oxygen.
Solution Approach 2:
The touch panel is designed to serve multiple functions simultaneously: it provides touch sensing capability, structural support, and environmental protection through integrated water/oxygen barrier layers. This multi-functionality allows the same component to fulfill both user interface and protective packaging roles, reducing the number of separate components needed.
2Ease of manufacture
If separate substrates are assembled for touch structure and OLED, then manufacturing flexibility is improved, but device complexity increases
Solution Approach 1:
The patent merges the touch panel substrate and OLED substrate into a single integrated structure. The sensing circuit and water/oxygen barrier layer are formed on the same first substrate that will eventually enclose the OLED, reducing the number of separate substrate assembly steps and simplifying the overall device structure while maintaining manufacturing flexibility.
3Ease of operation
If conventional adhesives are used to package OLED, then assembly ease is improved, but water/oxygen blocking ability deteriorates
Solution Approach 1:
The patent employs composite material structures with multiple water/oxygen barrier layers consisting of different materials (such as inorganic oxide layers and organic barrier layers) deposited in sequence. This composite approach creates superior moisture and oxygen blocking performance compared to conventional single-material adhesives, while still maintaining assembly feasibility through controlled deposition processes.
Data Source
AI summary
A touch-sensing display apparatus including a touch panel, an environmentally sensitive electronic device and an adhesive layer is provided. The water/oxygen vapor transmission rate of the touch panel is lower than 10−1 g/m2*day, and the touch panel includes a first substrate, a sensing circuit and at least one water/oxygen barrier layer. The first substrate is a first flexible substrate. The sensing circuit and the water/oxygen barrier layer are disposed on the first substrate. The environmentally sensitive electronic device includes a second substrate and a pixel array. The pixel array is disposed on the second substrate and between the first substrate and the second substrate. The adhesive layer is disposed between the touch panel and the environmentally sensitive electronic device. Moreover, a fabricating method of the above-mentioned touch-sensing display apparatus is also provided.