Touch Display Panel Insulating Layer for Encapsulation Protection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The encapsulation layer in OLED display panels is prone to damage during the formation of the touch layer, leading to poor protection performance.
Innovation Solution
A touch display panel design with a touch layer comprising a touch electrode layer and a touch insulating layer, where the insulating layer covers the top and side faces of the encapsulation layer, preventing damage during the patterning process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the touch layer is formed on the encapsulation layer, then the touch control function is achieved, but the encapsulation layer is damaged resulting in poor protection performance
Solution Approach 1:
The patent applies preliminary action by forming the touch insulating layer before forming the touch electrode layer. The touch insulating layer is deposited and patterned first to define the regions where the encapsulation layer should be protected, then the touch electrode layer is formed on top. This sequential approach ensures the encapsulation layer is shielded from damage during subsequent processing steps.
Solution Approach 2:
The touch insulating layer serves as an intermediary between the touch electrode layer and the encapsulation layer. It acts as a protective mediator that prevents direct contact and potential damage between the touch electrode structures and the encapsulation layer, while still allowing the touch control function to operate effectively.
2Ease of operation
If the touch electrode layer is manufactured directly on the encapsulation layer, then the touch sensitivity is improved, but the encapsulation layer integrity is compromised
Solution Approach 1:
The touch insulating layer is formed in advance with specific pattern design that preserves the encapsulation layer integrity. By pre-defining the touch electrode regions through the insulating layer, the encapsulation layer remains intact while still enabling touch sensitivity in the required areas.
Solution Approach 2:
The touch insulating layer is selectively positioned only where needed for touch functionality, allowing the encapsulation layer to maintain its integrity in non-touch regions while enabling touch sensitivity in specific areas. This local differentiation resolves the contradiction between touch sensitivity and encapsulation integrity.
Data Source
AI summary
Provided is a touch display panel. The touch display panel includes a drive back plate, a light-emitting device, an encapsulation layer, and a touch layer, wherein the light-emitting device is disposed on the drive back plate; the encapsulation layer is disposed on a side of the light-emitting device distal from the drive back plate; and the touch layer is disposed on a side of the encapsulation layer distal from the light-emitting device, wherein the touch layer comprises a touch electrode layer and a touch insulating layer, wherein the touch insulating layer is disposed on a side of the touch electrode layer distal from the encapsulation layer and/or between the touch electrode layer and the encapsulation layer, wherein the encapsulation layer is formed by a top face, a bottom face, and a side face, at least portion of the touch insulating layer covers the top face and the side face.