OLED Touch Display Via Hole Integration
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Solution Overview
Problem
Existing OLED touch control display devices are complex, thick, and costly due to redundant structures and complex manufacturing processes.
Innovation Solution
The solution involves arranging via holes in a substrate to integrate touch control and display functions, with touch control pattern areas connected through these holes, reducing the need for multiple layers and simplifying the structure, allowing for single-sided IC or FPC coating and reducing production steps and costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If OLED panel and touch panel are attached together by optical adhesive or other attachment manners, then touch control function and display function are both realized, but the thickness becomes great and the structure becomes redundant
Solution Approach 1:
The patent merges the OLED panel and touch panel into a single integrated structure where the touch control pattern areas are formed on the same substrate as the OLED display. The via holes penetrate through the substrate to connect touch control electrodes on opposite sides, eliminating the need for separate attached panels and reducing overall thickness.
Solution Approach 2:
The patent utilizes the third dimension (depth) by forming via holes that penetrate through the substrate thickness. This allows touch control electrodes to be positioned on opposite surfaces of the same substrate, effectively using the vertical dimension to separate touch and display functions while maintaining a thin overall structure.
2Ease of operation
If OLED panel and touch panel are attached together by optical adhesive or other attachment manners, then touch control function and display function are both realized, but the manufacturing process becomes complex and cost increases
Solution Approach 1:
The patent combines touch control and display manufacturing into a single integrated process. Both the OLED display structures and touch control pattern areas are formed on the same substrate using coordinated photolithography and etching steps, eliminating the need for separate manufacturing and assembly processes for distinct panels.
Solution Approach 2:
The patent segments the substrate into different functional regions (OLED display areas and touch control pattern areas) that can be independently designed and processed. This segmentation allows for specialized optimization of each function while maintaining a unified manufacturing approach through coordinated processing steps.
3Device complexity
If via holes are used to connect touch control pattern areas on opposite sides of the substrate, then the structure is simplified and thickness is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The patent incorporates alignment marks and positioning structures during the substrate preparation phase. These preliminary features guide the subsequent via hole formation and ensure proper alignment between touch control electrodes on opposite sides, addressing the precision requirement before the critical via hole etching step.
Data Source
AI summary
The present invention provides an OLED touch control display device, a method for manufacturing an OLED touch control display device, and a method for manufacturing a touch control screen. The OLED touch control display device comprises a substrate having a first surface and a second surface arranged opposite the first surface, a touch control screen arranged on the first surface, defining a display area arranged on the second surface, a touch control interface circuit connected to the touch control screen, defining an interface binding area connected to the display area, and defining via holes penetrating the first surface and the second surface. The touch control interface circuit and the interface binding area are arranged on the first surface or the second surface. The touch control screen includes touch control pattern areas arranged in a matrix and connected together via the via holes.