Wireless Thermal Management for Smart Glasses

Solution Overview

Problem

Current wireless communication devices, such as smart glasses, face significant challenges with power consumption and thermal management during tasks like live streaming, leading to reduced runtime and stability due to increased heat generation, especially as Wi-Fi link capacity deteriorates.

Innovation Solution

A wireless thermal management system that utilizes temperature sensors and real-time Wi-Fi link capacity and throughput estimates to calculate a Wi-Fi link metric, determining the need for thermal mitigation by adjusting transmission rates or batching data to reduce power consumption and heat in devices like smart glasses.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If live streaming video is performed on smart glasses, then user experience and content delivery are improved, but power consumption increases and thermal stress increases

Engineering Contradiction:

Improvelive streaming capabilityVSAvoidpower consumption

Core Design Contradiction:

ProductivityVSUse of energy by moving object

Solution Approach 1:

The system dynamically adjusts the Wi-Fi transmission rate based on real-time temperature monitoring. When thermal stress exceeds thresholds, the system automatically reduces transmission rate to lower power consumption and heat generation, while maintaining acceptable video quality through adaptive bitrate streaming techniques

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system implements continuous feedback through temperature sensors that monitor thermal stress in real-time. This feedback loop enables the system to detect thermal conditions and adjust Wi-Fi transmission parameters accordingly, creating a closed-loop control system that balances productivity with thermal management

Inventive Principle:

Principle #23Feedback

2Temperature

If Wi-Fi link capacity is reduced to lower power consumption, then thermal stress decreases, but data transmission speed decreases

Engineering Contradiction:

Improvethermal stressVSAvoiddata transmission speed

Core Design Contradiction:

TemperatureVSSpeed

Solution Approach 1:

The system dynamically adjusts the Wi-Fi transmission rate based on real-time temperature monitoring. When thermal stress exceeds thresholds, the system automatically reduces transmission rate to lower power consumption and heat generation, while maintaining acceptable video quality through adaptive bitrate streaming techniques

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system changes the transmission rate parameter of Wi-Fi communication based on thermal conditions. By modulating this key parameter, the system achieves thermal management while maintaining acceptable data transmission speeds through intelligent adaptation to both thermal and network conditions

Inventive Principle:

Principle #35Parameter changes

3Temperature

If transmission rate is reduced to mitigate heat, then thermal conditions improve, but latency increases

Engineering Contradiction:

Improvethermal conditionsVSAvoidlatency

Core Design Contradiction:

TemperatureVSLoss of time

Solution Approach 1:

The system dynamically adjusts the Wi-Fi transmission rate based on real-time temperature monitoring. When thermal stress exceeds thresholds, the system automatically reduces transmission rate to lower power consumption and heat generation, while maintaining acceptable video quality through adaptive bitrate streaming techniques

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system performs preliminary actions by buffering video data and pre-processing frames before transmission. This allows the system to maintain acceptable latency even when transmission rate is reduced, as buffered content can be delivered more efficiently and thermal management can be applied without significant latency penalty

Inventive Principle:

Principle #10Preliminary action

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 approach effectively extends battery life, improves stability, and maintains acceptable thermal conditions for smart glasses by optimizing data transmission based on thermal stress levels and link quality, thereby enhancing user experience and device safety.

Implementation Method 1

The exemplary embodiments may also utilize temperature sensors for capturing and determining thermal stress levels of a HMD for thermal mitigation purposes

Methodology Applied

Scientific EffectTemperature sensing:

Data Source

PatentUS20240276396A1Wireless thermal management

Publication Date: 2024.08.15 META PLATFORMS INC

AI summary

A system and method for wireless thermal management is provided. The system may receive at least one wireless link capacity estimate from a first device. The wireless link capacity estimate may indicate an estimated data transfer or transmission rate associated with the communication device. The system may receive at least one throughout estimate from a second device. The at least one throughput estimate may be associated with a data transfer rate during a time period. The system may determine, based on the at least one wireless link capacity estimate or the at least one throughput estimate, a wireless link metric indicating or denoting a power consumption or a load associated with the communication device. The system may determine, based on the wireless link metric, whether to apply a level of thermal mitigation to the communication device.