Regulating device surface temperature

A computing device, comprising:

• a surface;
• a processor;
• and
• a memory storing instructions executable by the processor to:
• determine a surface temperature of the surface;
• determine an energy accumulator value indicating cumulative energy received by a user via the surface, wherein the energy accumulator value is adjusted based at least in part on determining whether the device surface is in contact with the user;
• use a dynamic temperature limit function to calculate a temperature limit as a function of the energy accumulator value;
• determine whether the surface temperature has reached the temperature limit;
• when the surface temperature has not reached the temperature limit, increment the energy accumulator value;
• and
• when the surface temperature has reached the temperature limit, initiate a thermal mitigation action to cool the surface.

A head-mounted display (HMD) device, comprising:

• a display;
• a surface;
• a processor;
• and
• a memory storing instructions executable by the processor to:
• determine a surface temperature of the surface;
• determine an energy accumulator value indicating cumulative energy received by a user via the surface, wherein the energy accumulator value is adjusted based at least in part on determining whether the device surface is in contact with the user;
• use a dynamic temperature limit function to calculate a temperature limit as a function of the energy accumulator value;
• determine whether the surface temperature has reached the temperature limit;
• when the surface temperature has not reached the temperature limit, increment the energy accumulator value;
• and
• when the surface temperature has reached the temperature limit, initiate a thermal mitigation action to cool the surface.