Display Substrate Mesh Antenna for Thin NFC Integration
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Solution Overview
Problem
Existing NFC-enabled electronic devices face challenges in achieving a thin and light design due to the need for a separate NFC communication module that occupies significant space, which interferes with the compactness of the device.
Innovation Solution
A display substrate integrated with a near field communication antenna, where the antenna is embedded within the display area, utilizing a conductive mesh and coil structures that do not compromise the display's pixel aperture ratio or functionality, allowing for space-saving integration of NFC capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate NFC communication module is externally placed on the mainboard, then NFC functionality is achieved, but the device occupies large space and cannot achieve thin and light design
Solution Approach 1:
The patent merges the NFC antenna with the display substrate by integrating the conductive mesh structure into the display area. The antenna is formed using the same conductive materials and manufacturing processes as the display electrode, combining two functional components into a single integrated structure that achieves both display and NFC functions without requiring separate modules.
Solution Approach 2:
The display substrate is designed to serve multiple functions: it acts as both the display electrode substrate and the NFC antenna. The conductive mesh pattern on the display substrate simultaneously performs the electrical connection function for display pixels and the electromagnetic radiation function for NFC communication, making the display substrate a multi-functional component.
2Volume of moving object
If a conductive mesh antenna is integrated into the display area, then space is saved, but the pixel aperture ratio may be affected
Solution Approach 1:
The conductive mesh pattern is designed with varying local properties: in regions where pixel aperture is critical, the mesh lines are optimized to minimize obstruction, while in peripheral or less critical areas, the mesh can be denser. The pattern density and line width are locally adjusted to balance antenna performance with display quality requirements in different zones of the screen.
Solution Approach 2:
The antenna design transitions from a traditional planar trace pattern to a mesh structure that utilizes both horizontal and vertical dimensions equally. This two-dimensional mesh pattern distributes the conductive material more evenly across the display area, reducing localized obstruction and maintaining better light transmission while achieving adequate antenna performance.
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
Enables the integration of NFC functionality within the display substrate without increasing the device's thickness or affecting its display performance, thereby enhancing the device's compactness and usability.
Implementation Method 1
a near field communication antenna, where the antenna is embedded within the display area, utilizing a conductive mesh and coil structures that do not compromise the display's pixel aperture ratio or functionality
Data Source
AI summary
A display substrate has a display area and a peripheral area surrounding the display area; the display area has a functional area and a non-functional area; the display substrate includes a base substrate, a plurality of first signal lines, a first interlayer insulating layer, a plurality of second signal lines, a conductive mesh and an auxiliary functional structure; the conductive mesh includes a plurality of first conductive structures and a plurality of second conductive structures which are arranged crosswise and electrically connected to each other; the auxiliary functional structure includes a plurality of first conductive wires and a plurality of second conductive wires which are arranged crosswise; the first conductive wire is at least a part of the first conductive structure, and each of some first conductive structures includes two first conductive wires; the second conductive wire is at least a part of the second conductive structure.