Capacitively Coupled Antenna Pads for Display Panel Efficiency
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Solution Overview
Problem
As electronic devices become smaller, the limited space for antennas leads to reflection loss and poor signal transmission efficiency, rendering them less functional for communication purposes.
Innovation Solution
The design includes a display panel with an antenna pattern and pads that are capacitively coupled, where the size of the overlapping area between the pads is kept constant, facilitating impedance matching and reducing reflection loss by maintaining consistent capacitance between the pads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the antenna size is reduced to fit compact electronic devices, then the device size decreases, but reflection loss increases and power transmission efficiency deteriorates
Solution Approach 1:
The antenna is integrated within the display panel structure, nesting the antenna pattern between the display panel layers. This allows the antenna to be housed within the existing device volume without increasing overall device size, while maintaining adequate antenna dimensions for acceptable power transmission efficiency
Solution Approach 2:
The antenna pattern is arranged to overlap with the active area of the display panel in a plan view, utilizing the vertical stacking of display panel layers to accommodate the antenna. This dimensional approach allows the antenna to occupy space in the vertical dimension rather than expanding the horizontal footprint
2Loss of energy
If the pad size is increased to improve capacitive coupling, then power transmission efficiency improves, but the space available for other components decreases
Solution Approach 1:
The first pad and second pad are positioned on different layers of the display panel, overlapping in plan view but separated vertically by a dielectric layer. This layered arrangement increases the effective capacitive coupling area without consuming additional horizontal space, as the pads utilize the vertical dimension for their interaction
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 enhances power transmission efficiency by minimizing impedance mismatch and ensuring reliable communication in compact electronic devices.
Implementation Method 1
a second pad facing the first pad, spaced apart from the first pad by a predetermined distance, and capacitively-coupled to the first pad
Implementation Method 2
a dielectric layer disposed between the first pad and the second pad. The dielectric layer includes an organic layer and a spacer disposed in the organic layer
Data Source
AI summary
The present disclosure relates to an electronic apparatus. The electronic apparatus includes a display panel, a pattern portion, and a circuit portion. The display panel includes an active area and a peripheral area. The pattern portion includes an antenna pattern disposed on the display panel and a first pad connected to the antenna pattern. The circuit portion includes a second pad facing the first pad, wherein the second pad is spaced apart from the first pad by a predetermined distance. The second pad is capacitively-coupled to the first pad and a radio frequency device electrically connected to the second pad.