Touch Display Substrate Layout for Narrow-Bezel Touch Integration
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing touch display technologies face challenges in achieving a narrow bezel design, high production costs, and complex manufacturing processes, particularly in integrating display and touch control on a panel.
Innovation Solution
A touch display substrate design that includes a base substrate with a touch lead layer, an anode conductive layer, and a cathode conductive layer, where the anode conductive layer has transfer connection electrodes, and cathodes are multiplexed as touch electrodes, connected through these electrodes, with at least part of the touch leads located in the display region, simplifying manufacturing and reducing bezel size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If touch leads are disposed in a non-display region, then signal interference is reduced, but bezel size increases
Solution Approach 1:
The patent moves touch leads from the horizontal plane (non-display region) to the vertical dimension by routing them through the thickness of the display panel. This allows touch leads to pass through the display region without occupying lateral space, thus reducing bezel size while maintaining signal integrity through proper layer isolation.
Solution Approach 2:
The touch leads are nested within the display panel structure itself, passing through multiple layers (substrate, encapsulation layers, electrode layers) in a vertically integrated manner. This nesting approach allows signal transmission without requiring additional lateral space, effectively reducing bezel dimensions.
2Reliability
If separate touch control panel and display panel are used, then functional performance is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The patent integrates the touch control panel and display panel into a single unified structure. The touch electrode layers are formed on the same substrate as the display structure, with shared encapsulation and support layers. This merging eliminates the need for separate manufacturing processes and assembly steps while maintaining distinct functional zones for display and touch control.
Solution Approach 2:
The substrate and encapsulation layers serve dual functions: supporting both the display structure and the touch control structure simultaneously. The same substrate provides mechanical support for OLED pixels and touch electrodes, while encapsulation layers protect both functional areas, reducing the need for separate protective structures.
3Reliability
If multiple separate layers and components are used for touch and display, then functional separation is improved, but material usage and production cost increase
Solution Approach 1:
The patent employs universal layers that perform multiple functions: the substrate serves as both mechanical support and insulation layer; encapsulation layers provide both protection and electrical isolation; and conductive layers serve as both electrodes and signal transmission paths. This multi-functionality reduces the total number of separate material layers required.
Solution Approach 2:
The patent combines touch electrode layers with display electrode layers in a shared structure. The anode conductive layer and cathode conductive layer serve dual purposes as both display electrodes and touch sensing electrodes, eliminating the need for separate dedicated touch electrode layers and reducing overall material consumption.
Data Source
AI summary
Disclosed are a touch display substrate, a drive method therefor, and a touch display apparatus. The touch display substrate includes a base substrate, and a touch lead layer, an anode conductive layer, and a cathode conductive layer disposed on the base substrate, the anode conductive layer is located between the touch lead layer and the cathode conductive layer on a plane perpendicular to the base substrate, the anode conductive layer includes a plurality of transfer connection electrodes, the touch lead layer includes a plurality of touch leads, and the cathode conductive layer includes a plurality of cathodes; the plurality of cathodes are multiplexed as a plurality of touch electrodes, the plurality of touch electrodes are electrically connected with the plurality of touch leads through the plurality of transfer connection electrodes, and at least part of the touch leads are located in a display region (AA) of the touch display substrate.