Electronic device and method of estimating human body microclimate temperature using the same

A method of estimating human body microclimate temperature by an electronic device, the electronic device comprising a first temperature sensor, a second temperature sensor, a first thermally insulating material disposed between the first temperature sensor and the second temperature sensor, a second thermally insulating material disposed between the second temperature sensor and a front surface of a main body of the electronic device, the method comprising:

• by the first temperature sensor included in the main body of the electronic device, measuring a first temperature at a first distance from a rear surface of the main body;
• by the second temperature sensor disposed in the main body, measuring a second temperature at a second distance from the rear surface of the main body;
• estimate a heat flux based on a difference between the first temperature and the second temperature;
• setting a first correction factor to a value between a second correction factor and a third correction factor, wherein the second correction factor is calculated based on a resistance value of the first thermally insulating material and a resistance value of the second thermally insulating material, and the third correction factor is calculated based on the resistance value of the first thermally insulating material, the resistance value of the second thermally insulating material, and an air resistance value of the front surface of the main body;
• obtaining a corrected heat flux by applying the first correction factor to the estimated heat flux;
• estimating a microclimate temperature around a body of a user by combining the corrected heat flux with the second temperature.

A smartwatch comprising:

• a main body;
• and
• a strap connected to the main body,
• wherein the main body comprises:
• a first temperature sensor configured to measure a first temperature at a first distance from a rear surface of the main body;
• a second temperature sensor configured to measure a second temperature at a second distance from the rear surface of the main body;
• a first thermally insulating material disposed between the first temperature sensor and the second temperature sensor;
• a second thermally insulating material disposed between the second temperature sensor and a front surface of the main body, and
• a processor configured to, while the main body is worn on a user or is carried by the user:
• estimate a heat flux based on a difference between the first temperature and the second temperature;
• set a first correction factor to a value between a second correction factor and a third correction factor, wherein the second correction factor is calculated based on a resistance value of the first thermally insulating material and a resistance value of the second thermally insulating material, and the third correction factor is calculated based on the resistance value of the first thermally insulating material, the resistance value of the second thermally insulating material, and an air resistance value of the front surface of the main body;
• obtain a corrected heat flux by applying the first correction factor to the estimated heat flux;
• and
• estimate a microclimate temperature around a body of the user by combining the corrected heat flux with the second temperature.