Touch Display Panel Gasket Structure for Reliable Signal Transmission
Solution Overview
Problem
In touch display panels, the conductive structures on the array substrate and encapsulation glass often have a non-planar contact surface due to manufacturing processes, leading to a small effective contact area and affected conduction, which hampers the transmission of touch signals.
Innovation Solution
The implementation of first and second conductive structures with gasket structures that include recessed portions and support portions, ensuring a larger flat surface contact area between the conductive structures on the array substrate and encapsulation glass, thereby improving the effective contact and signal transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional conductive structures are used without gasket modifications, then the manufacturing process is simpler, but the effective contact area is small leading to poor conduction
Solution Approach 1:
The gasket structure is segmented into multiple functional regions: a first gasket portion providing a first flat surface for the first conductive structure, and a second gasket portion providing a second flat surface for the second conductive structure. This segmentation allows each portion to be optimized independently for its specific conduction interface, ensuring reliable electrical contact while maintaining manufacturing feasibility through modular construction.
Solution Approach 2:
The gasket structure acts as an intermediary component between the array substrate and the encapsulation glass. It provides planarized contact surfaces that mediate the interface between the conductive structures on either side, ensuring stable electrical connection despite manufacturing variations in substrate flatness or conductive structure topology.
2Manufacturing precision
If the conductive structure has a non-planar surface due to manufacturing, then the manufacturing process is simpler, but the effective contact area is reduced affecting signal transmission
Solution Approach 1:
The gasket structure is prepared in advance with pre-formed flat surfaces before the conductive structures are assembled onto it. The first gasket portion provides a predetermined flat surface for the first conductive structure, and the second gasket portion provides a predetermined flat surface for the second conductive structure, ensuring planarity is established before final assembly.
Solution Approach 2:
The gasket structure modifies the surface topology parameter of the conductive interfaces by providing planarized contact surfaces. It transforms the potentially non-planar surfaces of the conductive structures into flat interfaces, changing the geometric parameters of the contact surfaces to ensure adequate contact area and reliable conduction.
3Reliability
If the contact area between conductive structures is small, then the device structure is more compact, but the signal transmission is affected due to increased contact resistance
Solution Approach 1:
The gasket structure extends the contact interface in the vertical dimension by providing elevated flat surfaces that protrude from the substrate planes. This dimensional extension allows for larger contact areas without increasing the planar footprint, maintaining device compactness while improving electrical conduction through enhanced contact geometry.
Data Source
AI summary
Provided are a touch display panel and a display device. The touch display panel includes a first substrate and a second substrate disposed opposite to the first substrate. In a non-display area, multiple first conductive structures and multiple metal wires are configured on one side of the first substrate facing to the second substrate, and multiple second conductive structures are configured on one side of the second substrate facing to the first substrate. Each first conductive structure is electrically connected to a respective second conductive structure. Each first conductive structure includes a first transmit electrode and a first gasket structure that is disposed between the first transmit electrode and the first substrate. The first transmit electrode is electrically connected to a metal wire and the respective one second conductive structure. The first gasket structure includes multiple first recessed portions.