Abstract
Extended Reality (XR) head-wearable devices often encounter thermal operational boundaries imposed by human physiological skin comfort limits. Some international safety standards limit skin-contact substrates to specific temperatures (e.g., approximately ) to prevent low-temperature epithelial tissue burns during sustained device use. Conventional thermal management systems attempt to mitigate internal thermal spikes by universally throttling clock frequencies across central and graphics processing cores, which drops frame rates, introduces visual interface stuttering, and disrupts spatial immersion. Furthermore, traditional architectures measure internal silicon junction metrics rather than real-time biological heat absorption properties, failing to decouple internal heat generation from localized surface comfort constraints.
The disclosed technology describes a hardware-isolated, location-specific asymmetric thermal migration architecture that maintains unthrottled execution on head-wearable devices without exceeding skin comfort limits. A physical high-impedance thermal isolation barrier, which may include a thin-film silica aerogel matrix or a vacuum air gap, is embedded directly into the headset between internal printed circuit board (PCB) heat sources and skin-contacting node substrates, such as nose pads and temple tips. Embedded thermistor arrays sample the temperature gradient across this isolation barrier, allowing a digital signal processor to calculate a real-time biological heat flux vector using Fourier's Law of Heat Conduction to isolate skin heat absorption rates from internal chip thermal radiation. Upon detecting localized surface thermal acceleration at a specific contact node, a routing engine executes a geographic core evacuation of only the thread family associated with the physically adjacent silicon sub-cluster to a paired secondary host device over a local wireless link. For example, thermal spikes at the front-bridge nose pads trigger the selective offloading of adjacent Neural Processing Unit (NPU) threads (including spatial anchor tensors, Simultaneous Localization and Mapping (SLAM) pipelines, and computer vision layers), whereas thermal spikes at the temple tips trigger the offloading of adjacent Radio Frequency (RF) modem threads (including baseband modems and packet encoding layers).
To manage the high thermal capacitance and slow cooling velocity of human epidermal tissue, the system applies a time-decaying software biological tissue hysteresis filter to govern thread re-boarding and prevent continuous thread-dumping deadlocks or system oscillations. Empirical characterization confirms that this localized asymmetric core migration maintains face-chassis contact surfaces safely below a peak boundary temperature (e.g., , achieving under maximum sustained compute loads) while preserving an unthrottled display refresh rate (e.g., refresh rate ) without frame dropping or panel dimming.
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.
Recommended Citation
Garg, Rohan, "Selective Core Migration in Wearable Headsets via Biological Heat Mapping Across Thermal Isolation Barriers", Technical Disclosure Commons, ()
https://www.tdcommons.org/dpubs_series/12882