Display Sensing Electrode Layout for Low-Parasitic Antenna Performance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
As display devices become thinner, the increased parasitic capacitance between radiation electrodes and display panels leads to degraded radiation efficiency, gain characteristics, and frequency bandwidth of the antenna.
Innovation Solution
Incorporating a sensing electrode on the display panel with a transmission line and an insulating layer between the transmission line and a radiation electrode, where the transmission line overlaps the radiation electrode, and a portion of the transmission line extends in a different direction to maximize overlap area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the display device is slimmed to reduce thickness, then the overall device thickness is reduced, but parasitic capacitance between the radiation electrode and display panel increases, degrading radiation efficiency and frequency bandwidth
Solution Approach 1:
An insulating layer is introduced as an intermediary between the radiation electrode and the display panel (specifically between the radiation electrode and the sensing electrode or transmission line). This insulating layer acts as a mediator that reduces parasitic capacitance while allowing the antenna to maintain its slimmed profile, thus resolving the contradiction between reduced thickness and maintained radiation efficiency
Solution Approach 2:
The patent utilizes the vertical dimension (z-axis) by stacking multiple layers including the insulating layer between the radiation electrode and display panel components. This dimensional approach allows the system to maintain thin overall profile while managing parasitic capacitance through vertical layering rather than increasing horizontal separation
2Device complexity
If the distance between radiation electrode and display panel is reduced to achieve thinner device, then manufacturing complexity is reduced, but parasitic capacitance increases causing degraded gain characteristics and frequency bandwidth
Solution Approach 1:
The insulating layer serves as a mediator that enables close proximity between the radiation electrode and display panel without direct contact, thus maintaining manufacturing simplicity while preserving frequency bandwidth through reduced parasitic capacitance
Solution Approach 2:
The patent changes the dielectric parameter by introducing an insulating layer with specific dielectric properties between the radiation electrode and display panel. This parameter change allows the system to maintain thin profile while controlling parasitic capacitance to preserve frequency bandwidth and gain characteristics
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
This configuration minimizes parasitic capacitance, enhancing radiation efficiency and frequency bandwidth while maintaining effective communication functions.
Implementation Method 1
parasitic capacitance between the radiation electrode and the display panel increases
Data Source
AI summary
A display device includes a display panel, a sensing electrode disposed on the display panel, a transmission line disposed on the display panel and spaced apart from the sensing electrode, an insulating layer disposed on the sensing electrode and the transmission line, and a radiation electrode disposed on the insulating layer. A portion of the transmission line overlaps a portion of the radiation electrode when viewed in a plane.