Edge Protection Layer for Touch Display Panel
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Solution Overview
Problem
Existing touch display devices have a large overall thickness and weight due to the use of a protection glass for the touch substrate, which reduces touch sensitivity and response speed.
Innovation Solution
A touch display panel with an edge protection layer that surrounds the touch panel, eliminating the need for additional protection glass, thereby reducing thickness and weight while improving sensitivity and response speed, and achieving a 'no frame' display effect by refracting light and matching refractive indices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If protection glass is added to protect the touch substrate, then the touch panel becomes more durable, but the overall thickness and weight increase
Solution Approach 1:
The patent combines the protection function with the edge seal structure by integrating the edge protection layer into the existing edge seal design. This merging eliminates the need for separate protection glass while maintaining protective functionality, thereby reducing weight without compromising durability.
Solution Approach 2:
The patent employs a thin film edge protection layer made of flexible materials that can conform to the touch panel edges. This thin film structure provides necessary protection while adding minimal weight, replacing the heavy rigid protection glass with a lightweight alternative.
2Reliability
If protection glass is added to protect the touch substrate, then the touch panel becomes more durable, but the touch sensitivity and response speed decrease
Solution Approach 1:
By merging the protection function into the edge seal structure, the patent eliminates the interference of protection glass with touch sensitivity. The edge protection layer provides durability without creating the physical barrier that protection glass creates, allowing direct touch interaction with the touch substrate.
Solution Approach 2:
The patent extracts the protection function from the bulk structure (protection glass) and relocates it to the edge region (edge protection layer). This extraction allows the central touch area to remain exposed and responsive while still providing protection where needed.
3Shape
If edge protection layer with varying thickness is used, then the no frame display effect is achieved, but the manufacturing precision requirements increase
Solution Approach 1:
The patent applies local quality by varying the thickness of the edge protection layer specifically at the edges to achieve the no frame effect, while maintaining standard thickness in other areas. This localized variation meets the aesthetic requirement without requiring precision control across the entire structure.
Solution Approach 2:
The patent utilizes parameter changes by gradually varying the thickness parameter of the edge protection layer from the center toward the edges. This controlled parameter variation creates the desired optical effect while using standard manufacturing tolerances rather than requiring extreme precision.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution reduces the probability of the touch panel breaking, achieves lower thickness and weight, and enhances touch sensitivity and response speed, while eliminating the frame appearance for improved display effects.
Implementation Method 1
the edge protection layer is configured to refract light going through the edge protection layer to realize an effect of no frame
Implementation Method 2
a refractive index of the edge protection layer is equal to a refractive index of the base substrate
Data Source
AI summary
A touch display panel and a preparation method therefor, and a display device are provided. The touch display panel includes a display panel, a touch control panel arranged on the display panel and an edge protection layer. The projection of the touch control panel on the display panel is located in the display panel, and the edge protection layer is arranged around the touch control panel.