OLED Touch Sensor Integration on Encapsulation for Adhesive-Free Assembly
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Solution Overview
Problem
The existing manufacturing process for organic light emitting displays with touchscreens is complicated and costly due to the separate production and attachment of a touchscreen to the display panel, which involves additional adhesion processes.
Innovation Solution
The touch sensor is directly integrated onto the encapsulation part of the organic light emitting display, eliminating the need for an adhesion process and simplifying the manufacturing process, while using the same material for the display cover electrode and conductive layer to prevent damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a touchscreen is separately produced and attached to the display panel through adhesive agent, then the touch display function is achieved, but the manufacturing process becomes complicated and costs increase
Solution Approach 1:
The patent combines the touchscreen and display panel into a single integrated structure. The touch sensor is formed directly on the encapsulation layer of the display panel, eliminating the need for separate production and adhesive attachment processes. This merging of previously separate components resolves the technical contradiction by achieving the touch display function while simplifying the manufacturing process.
2Reliability
If a touchscreen is separately produced and attached to the display panel through adhesive agent, then the touch display function is achieved, but manufacturing costs increase
Solution Approach 1:
The patent merges the touchscreen and display panel into a single integrated structure, eliminating the need for separate production lines, inventory management, and adhesive materials. The touch sensor is formed using the same manufacturing processes as the display panel, reducing overall manufacturing costs while maintaining the required touch display function.
3Manufacturing precision
If the display cover electrode is made of different material than the conductive layer, then the display pad electrode may be exposed, but damage to the display pad electrode may occur
Solution Approach 1:
The patent applies homogeneity by making the display cover electrode the same material as the conductive layer. This ensures uniform material properties across the structure, providing consistent protection for the display pad electrode while maintaining proper coverage. The homogeneous material composition resolves the contradiction between achieving precise electrode coverage and protecting the display pad electrode from damage.
Data Source
AI summary
Disclosed is an organic light emitting display device with a touch sensor. The display device has a touch sensor that is directly disposed on a sealing part, thus removing the necessity of an additional adhesion process, simplifying a manufacturing process and reducing manufacture cost. In addition, the display device with the touch sensor includes a display cover electrode of a display pad that is made of a same material as a conductive layer included in the touch sensor, thus preventing damage to the display pad electrode.