Touch Control Substrate Dual Protection Layer Design
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing touch control panels face challenges in effectively protecting their electrode layers from moisture and dust, and the preparation process is complex and costly due to the need for etching the protection layer for frame lead connections.
Innovation Solution
A touch control substrate with a two-layer protection medium structure, where the first protection medium fixes and partially embeds the nano conductive layer, and the second protection medium completely covers the surface, combined with direct electrical contact through frame leads embedded in the nano conductive structure, reducing the need for etching and enhancing protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single thin protection layer is used on the touch control electrode layer, then the frame lead connection can be achieved, but the protection effect is limited and water vapor and dust can easily enter the electrode layer
Solution Approach 1:
The protection layer is divided into two distinct layers: a first protection layer that is transparent and continuous covering the entire touch control electrode layer, and a second protection layer that is opaque and positioned at the peripheral portion. This segmentation allows each layer to perform its specific function - the first layer provides comprehensive coverage while the second layer provides enhanced peripheral protection, together achieving effective barrier against water vapor and dust without compromising frame lead connection.
2Reliability
If the protection layer is made thick to improve protection effect, then water vapor and dust entry is reduced, but the frame lead connection becomes more complex requiring etching process
Solution Approach 1:
By segmenting the protection into two layers with different properties, the first protection layer can be made thin and continuous to maintain simple frame lead connection, while the second protection layer provides the necessary thick barrier effect at the periphery. This eliminates the need for etching processes to create openings in a single thick layer, as the second layer naturally provides the required protection without compromising the simplicity of frame lead connection.
Solution Approach 2:
The second protection layer is specifically positioned at the peripheral portion where enhanced protection is most needed, while the first protection layer provides continuous coverage across the entire electrode layer. This local quality differentiation allows the structure to achieve effective protection where required without unnecessarily complicating the frame lead connection areas.
3Device complexity
If a single protection layer is used, then the structure is simple, but the protection against moisture and dust is insufficient
Solution Approach 1:
The patent employs a composite protection structure combining two different protection layers with distinct material properties: the first protection layer is transparent and continuous, while the second protection layer is opaque and peripheral. This composite structure leverages the complementary characteristics of both layers to achieve superior moisture and dust protection that neither layer could provide alone, while maintaining overall structural simplicity.
Data Source
AI summary
A touch control substrate, a preparation method thereof, a touch control module, and a display device are provided. The touch control substrate comprises: a substrate, a conductive functional layer, and a second protection medium. The conductive functional layer is arranged on one side of the substrate, and comprises patterned nano conductive structure, first protection medium, and frame lead structure. The conductive functional layer is protected by providing a two-layer protection medium structure, wherein the first protection medium fixes the structural position of the nano conductive layer and protects the partial structure of the conductive functional layer, and the second protection medium at least completely covers the nano conductive layer located in the conductive functional area; and at the same time, the touch control substrate directly disposes the frame lead layer in the peripheral area of the nano conductive layer, making the frame lead directly contacting the nano conductive layer.