HMD Thermal Accessories for Higher Processing Power
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Computing devices used in artificial reality systems, such as HMDs, generate excessive heat due to power consumption and environmental factors, leading to overheating, reduced functionality, and potential damage, with limited thermal design power (TDP) in various environments.
Innovation Solution
The use of accessories with thermal contact points and heat dissipation mechanisms, including passive and active methods, to increase the thermal design power (TDP) of HMDs by redirecting heat to external accessories, such as visors, headbands, and docks, while ensuring user safety and comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the HMD operates in high-temperature environments or runs multiple applications for extended periods, then the processing power and functionality are improved, but the device overheats and thermal damage occurs
Solution Approach 1:
The thermal management system divides the heat dissipation function into separate modular components: conductive elements integrated into the HMD, removable thermal accessories (headbands, visors), and external cooling devices. This segmentation allows the thermal management capability to be distributed and scaled independently from the processing units, enabling sustained high processing power without overheating.
Solution Approach 2:
The patent extends thermal management from the traditional single-dimension approach (internal cooling within the HMD) to multi-dimensional heat dissipation by utilizing additional spatial dimensions through external accessories worn on the head and body. This distributes heat sinks across multiple body surfaces, dramatically increasing the effective thermal radiation and convection area available for heat dissipation.
2Temperature
If the HMD is designed with larger surface area for heat dissipation, then the thermal budget is improved, but the device size and weight increase
Solution Approach 1:
The patent extracts the bulk of the thermal dissipation mass from the HMD itself and places it in separate removable accessories (headbands, visors, external cooling devices). This allows the HMD to maintain its compact, lightweight form factor while the accessories provide the necessary thermal mass and surface area for effective heat dissipation.
Solution Approach 2:
The patent introduces thermal interface materials and conductive elements as intermediaries between the HMD heat sources and the larger thermal mass in external accessories. These intermediaries efficiently transfer heat from the compact HMD to the distributed thermal sinks in the accessories, enabling effective heat dissipation without directly increasing HMD size or weight.
3Temperature
If thermal contact points are exposed for accessory connection, then heat transfer efficiency is improved, but user comfort and safety are compromised due to direct skin contact with hot surfaces
Solution Approach 1:
The patent implements different surface qualities in different locations: highly conductive thermal contact surfaces for efficient heat transfer to accessories, and insulating or low-conductivity surfaces for user-contact areas. This local differentiation allows maximum heat transfer efficiency where needed while maintaining user comfort and safety where accessories or HMD surfaces contact the skin.
Solution Approach 2:
The patent introduces thermal interface materials and insulating layers as intermediaries between the high-temperature thermal contact points and the user's skin. These intermediaries allow efficient heat transfer to the accessory while preventing direct thermal contact between hot surfaces and the user, thereby maintaining both heat transfer efficiency and user comfort.
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
Enhances the thermal budget of HMDs, allowing for extended use in various environments, improved user experience, and protection from overheating, while maintaining comfort and functionality.
Implementation Method 1
The first accessory contact point may be a thermal contact feature configured to pass thermal energy to the accessory
Data Source
AI summary
An artificial reality device has a component, which component is configured to enable a visual associated with artificial reality programs to a user, as well as at least one heat source and a contact point. The contact point is specially configured to accommodate an accessory, which accessory is specially configured to extend the thermal headroom of the artificial reality device.