Wireless Power and Data Transfer for Head-Mounted Device Straps
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Solution Overview
Problem
Existing head-mounted devices face challenges in efficiently powering and communicating between removable accessories and the main housing, particularly in maintaining a hermetic seal to prevent moisture ingress.
Innovation Solution
The implementation of wireless power and communications circuitry between the removable head strap and the head-mounted housing, utilizing wireless radio-frequency and optical circuitry to transmit power and data, while ensuring hermetic seals through the use of sealed walls and transparent materials for optical communications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If wired power and data connections are used between removable accessories and head-mounted housing, then power transfer and communication efficiency are improved, but hermetic seal integrity deteriorates due to physical connection points
Solution Approach 1:
The patent replaces mechanical wired connections with wireless electromagnetic field-based power and data transmission. The head-mounted housing and removable accessories use electromagnetic induction or radio frequency communication to transfer power and data without physical connectors, thereby eliminating connection points that would compromise hermetic seals while maintaining efficient communication.
Solution Approach 2:
The patent introduces electromagnetic fields as an intermediary medium to transfer power and data between the head-mounted housing and removable accessories. This intermediary allows energy and information transmission through space without requiring direct physical contact, preserving the hermetic integrity of both components while enabling efficient communication.
2Adaptability or versatility
If removable accessories contain batteries and electrical components, then functionality and versatility are improved, but moisture ingress risk increases at connection interfaces
Solution Approach 1:
The patent eliminates mechanical connection interfaces between the head-mounted housing and removable accessories by using wireless electromagnetic communication. This substitution removes the vulnerability points where moisture could ingress, while still allowing removable accessories with batteries and electrical components to function fully through contactless power and data transfer.
Solution Approach 2:
The patent extracts the connection interface from the system by implementing wireless communication. By removing the physical connection point entirely, the patent eliminates the pathway for moisture ingress while preserving the electrical functionality of removable accessories through field-based energy and data transmission.
3Reliability
If physical connectors are used for power and data transmission, then transmission reliability is improved, but device complexity increases due to sealed interface requirements
Solution Approach 1:
The patent replaces complex mechanical sealed connectors with simpler wireless electromagnetic communication systems. By using electromagnetic fields for power and data transmission, the patent reduces device complexity regarding interface sealing while maintaining transmission reliability through established wireless communication protocols and electromagnetic coupling mechanisms.
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 solution enables efficient power transfer and data communication between the head strap and the housing, while maintaining a hermetic seal to prevent moisture ingress, thereby enhancing the durability and reliability of the head-mounted device.
Implementation Method 1
wireless power transmitting circuitry in the removable head strap that is configured to transmit power wirelessly
Implementation Method 2
optical circuitry that allow the head strap or other accessory to convey wireless data to corresponding communications circuitry in the head-mounted housing
Data Source
AI summary
A head-mounted device may have a head-mounted housing. The head-mounted housing may have displays that display images for a user. The images are viewable from eye boxes while the head-mounted device is being worn by the user. A head strap may be removably coupled to the head-mounted housing to help hold the displays in position during operation of the head-mounted device. The head strap and head-mounted housing may have wireless power circuitry and communications circuitry. The wireless power circuitry may be used to transmit power from a battery in the head strap to the head-mounted housing. The communications circuitry may include wireless radio-frequency circuitry and/or optical circuitry that allow the head strap to convey wireless data to the head-mounted housing. The head-mounted housing may also transmit power and/or data to the strap.