Display Device Antenna Touch Electrode Lattice Pattern Design
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Solution Overview
Problem
In display devices, the integration of antennas for communication functions often leads to signal loss and blocking due to their structure, which can negatively impact display quality, especially when positioned within the display area.
Innovation Solution
A display device design featuring a base substrate with distinct areas for touch and non-touch regions, incorporating lattice-patterned electrodes and dummy patterns with varying sizes and shapes to minimize visual stains and optimize antenna placement, while maintaining communication functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an antenna is provided in the electronic apparatus, then communication function is achieved, but signal loss and signal blocking occur due to the antenna structure
Solution Approach 1:
A dummy pattern is introduced as an intermediary element between the antenna electrode and the touch electrode. This dummy pattern acts as a mediator that redirects electromagnetic field lines, preventing direct interaction between the antenna and touch electrode that would cause signal blocking. The dummy pattern is electrically connected to the antenna electrode and positioned to intercept and redirect field lines away from the touch electrode area.
2Adaptability or versatility
If the antenna is positioned on the display area, then communication function is improved, but display quality is impacted due to visual stains
Solution Approach 1:
The dummy pattern is designed with spatially varying properties - it has different geometrical configurations in different regions. Specifically, the dummy pattern has a first region with a first geometrical configuration and a second region with a second geometrical configuration that is different from the first. This local variation optimizes both the electromagnetic field redistribution for communication performance and the visual appearance by minimizing stain visibility in different display areas.
3Area of stationary object
If touch electrode and antenna electrode are placed close to each other, then device area is reduced, but signal interference increases
Solution Approach 1:
The dummy pattern serves as a buffer zone between the antenna electrode and touch electrode. By positioning the dummy pattern in the first area adjacent to the antenna electrode, it creates an electromagnetic field transition zone that reduces direct coupling and interference between the antenna and touch electrode, allowing closer placement without significant signal loss.
Solution Approach 2:
The dummy pattern is designed with a specific geometrical configuration that extends in certain directions while being compact in others. The first geometrical configuration and second geometrical configuration differ in their spatial arrangement, allowing the dummy pattern to effectively shield against interference while occupying minimal area, thus resolving the conflict between compactness and interference reduction.
Data Source
AI summary
A display device includes: a base substrate including a touch area and a non-touch area adjacent to the touch area and including a first area and a second area; a touch electrode disposed in the touch area and including a lattice pattern; an antenna electrode disposed in the first area and including a lattice pattern; a first dummy pattern disposed in the first area; and a second dummy pattern disposed in the second area, wherein the second area is disposed between the first area and the touch area, and the lattice pattern of the touch electrode includes openings that are larger than openings of the lattice pattern of the antenna electrode.