Touch Display Upper Electrode Link Wire Integration
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Solution Overview
Problem
The complexity and inefficiency in forming touch electrodes and links in touch display apparatuses lead to decreased process efficiency and increased complexity in sensing user or tool touches.
Innovation Solution
A touch display apparatus design featuring a device substrate with a link wire, upper planarization layer, bank insulating layer, and separating partition, where the upper electrode is connected to the link wire through a second opening, and an electrode pattern is formed on the separating partition to simplify the process of sensing touches without additional patterning, utilizing reverse taper shapes and intermediate insulating layers for effective separation and connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If touch electrodes and touch links are formed on the encapsulating element in conventional touch display apparatuses, then touch sensing function is achieved, but the manufacturing process becomes complicated and process efficiency decreases
Solution Approach 1:
The patent extracts the touch sensing function from the encapsulating element and relocates it to the upper electrode layer. By removing the need for separate touch electrodes and touch links on the encapsulating element, the manufacturing process is simplified while the touch sensing function is preserved through the upper electrode's connection to the link wire.
Solution Approach 2:
The patent merges the touch sensing function with the upper electrode structure. The upper electrode serves dual purposes: as part of the light-emitting device and as the touch sensing element. This integration eliminates the need for separate touch electrode layers and reduces the number of manufacturing steps.
2Ease of operation
If additional touch electrodes and touch links are formed on the encapsulating element, then touch sensing capability is provided, but additional manufacturing processes are required reducing overall efficiency
Solution Approach 1:
The upper electrode is designed to perform multiple functions: it serves as the cathode for the light-emitting device and simultaneously functions as the touch sensing electrode. This multi-functionality eliminates the need for additional dedicated touch sensing components and their associated manufacturing processes.
Solution Approach 2:
The upper electrode structure provides its own touch sensing capability without requiring external or additional components. The link wire directly connects the upper electrode to the touch pad, creating a self-contained touch sensing system that reduces manufacturing complexity.
3Adaptability or versatility
If touch electrodes are disposed side by side on the encapsulating element connected to touch pads by touch links, then touch input is enabled, but the process becomes complicated with decreased process efficiency
Solution Approach 1:
The patent transitions the touch sensing structure from a planar arrangement on the encapsulating element to a vertical integration through the upper electrode layer. The link wire extends through multiple layers to connect the upper electrode to the touch pad, utilizing the vertical dimension to simplify the overall structure and manufacturing process.
Data Source
AI summary
A touch display apparatus for sensing a touch of a user and/or a tool is provided. The touch display apparatus includes upper electrodes on emission areas. The upper electrodes may be separated by a separating partition on a separating area and a second opening of a bank insulating layer. Each of the upper electrodes may be connected to one of link wires, which are disposed between a device substrate and the bank insulating layer. Thus, in the touch display apparatus, a process for sensing the touch of the user and/or the tool may be simplified, and a process efficiency may be improved.