Integrated OLED Touch Screen Thickness Reduction
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Solution Overview
Problem
Conventional OLED touch screen designs result in increased thickness due to separate manufacturing of OLED display panels and touch panels, which hinders the achievement of thin and lightweight product designs.
Innovation Solution
A touch screen design where electroluminescence pixel units and touch electrodes are integrated on a base substrate with insulation between them, using ink-jet printing for touch electrode formation and incorporating a polymer film and insulating layer to reduce thickness and enhance protection, allowing for flexible and thin OLED touch screen manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If OLED display panel and touch panel are manufactured separately and bonded together, then manufacturing precision and reliability are improved, but the overall thickness increases
Solution Approach 1:
The patent merges the OLED display panel and touch panel into a single integrated structure. The touch electrodes are formed directly on the OLED panel's encapsulation layer, eliminating the need for separate touch panel manufacturing and bonding processes. This integration reduces the overall thickness while maintaining manufacturing reliability through a unified fabrication process.
Solution Approach 2:
The touch electrode structure is nested within the OLED panel structure. The touch electrodes are positioned on the encapsulation layer, which itself is part of the OLED panel. This nested arrangement allows the touch functionality to be incorporated within the existing panel thickness rather than adding a separate layer, thereby reducing overall thickness.
2Reliability
If separate OLED panel and touch panel are bonded with adhesive, then functional reliability is improved, but device weight and thickness increase
Solution Approach 1:
The patent combines the OLED panel and touch panel into one integrated device, eliminating the adhesive layer and additional bonding structure. The touch electrodes are formed directly on the OLED encapsulation layer, removing the need for separate components and adhesive materials, thereby reducing overall weight.
Solution Approach 2:
The patent extracts and eliminates the adhesive layer and separate touch panel structure from the conventional design. By forming touch electrodes directly on the OLED encapsulation layer, the design removes unnecessary intermediate layers and components, reducing both weight and thickness.
3Productivity
If touch electrodes are formed by conventional methods, then manufacturing capability is maintained, but production efficiency and precision improve with ink-jet printing
Solution Approach 1:
The patent replaces conventional mechanical touch electrode formation methods with ink-jet printing technology. This substitution enables precise material deposition, reduces manufacturing steps, and improves production efficiency while maintaining ease of manufacture through a streamlined process.
Solution Approach 2:
The patent changes the manufacturing method parameter from conventional deposition techniques to ink-jet printing. This parameter change enables better control over electrode pattern precision, material utilization, and production speed, thereby improving both manufacturing efficiency and precision.
Data Source
AI summary
A touch screen and a manufacturing method thereof and a display device are provided. The touch screen includes a base substrate, electroluminescence pixel units disposed on the base substrate and arranged in array, touch electrodes disposed on the electroluminescence pixel units and arranged in array, the electroluminescent pixel units and the touch electrodes are insulated from each other.