Conductive Hinge Antenna Layout for Lightweight AR Glasses
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Solution Overview
Problem
Augmented reality (AR) glasses face challenges in reducing weight while maintaining wireless communication functionality, as weight reduction leads to limited antenna mounting space and potential negative effects from electromagnetic waves emitted close to the user's body.
Innovation Solution
The design incorporates a conductive hinge structure that connects the main housing and sub-housing of AR glasses, allowing for a conductive path for wireless communication signals, which reduces the thickness and weight by eliminating the need for additional electrical connection members and positions the antenna further from the user's body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If the housing size is reduced to decrease weight, then weight reduction is achieved, but antenna mounting space becomes limited
Solution Approach 1:
The patent merges the antenna structure with the housing itself by making the housing conductive and using it as part of the antenna system. The conductive hinge structure is integrated into the mechanical connection between housings, serving dual purposes as both a structural connector and an electrical connection element for the antenna circuit.
2Volume of moving object
If the antenna is disposed close to the user's body for compact design, then device compactness is improved, but electromagnetic wave exposure to the user increases
Solution Approach 1:
The patent extends the antenna structure along the temporal dimension by using the conductive hinge and conductive member that extend from the main housing toward the temple area. This spatial arrangement in another dimension allows the antenna to be positioned farther from the user's head while maintaining compact overall device volume.
3Reliability
If additional electrical connection members are used to ensure electrical connection, then electrical connection reliability is improved, but device thickness and weight increase
Solution Approach 1:
The patent merges the mechanical hinge structure with the electrical connection function. The conductive hinge structure serves as both the mechanical connector that allows folding and the electrical conductor that provides the antenna circuit path, eliminating the need for separate electrical connection members.
Solution Approach 2:
The conductive hinge structure performs multiple functions simultaneously: it provides mechanical support for folding the device, establishes electrical connection for the antenna circuit, and contributes to the overall structural integrity. This multi-functionality reduces the number of components needed.
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 design secures antenna mounting space, reduces electromagnetic wave exposure to the user, and enhances wearing comfort by minimizing the thickness and weight of the AR glasses.
Implementation Method 1
a wireless communication circuit disposed in the PCB, wherein the wireless communication circuit may be configured to transmit and/or receive a signal of a predetermined frequency band based on an electrical path including the conductive hinge structure and the conductive member
Data Source
AI summary
Augmented reality (AR) glasses may include a main housing configured to accommodate lenses of the AR glasses, with at least a portion of the main housing formed of a conductive member A sub-housing forms a leg of the AR glasses. A PCB is disposed in the sub-housing. A conductive hinge structure is configured to interconnect the main housing and the sub-housing such that the sub-housing is foldable with respect to the main housing. The conductive hinge structure is electrically connected to the PCB and the conductive member. A wireless communication circuit is disposed in the sub-housing and is configured to transmit and/or receive a signal of a predetermined frequency band based on an electrical path including the conductive hinge structure and the conductive member by directly feeding power to the conductive hinge structure. Various other embodiments identified through the specification are possible.