Devices, systems, and methods using wearable time domain-based activity tracker

US11452470B2 · kind B2 · utility

Assignee

• HI LLC · US

Inventors

• Ryan Field · Culver City, US
• Michael Henninger · Austin, US
• Katherine Perdue · Los Angeles, US
• Isai Olvera · San Jose, US
• Hamid Dehghani · Exeter, GB
• Julian Kates-Harbeck · Santa Monica, US
• Antonio H. Lara · Valencia, US
• Bryan Johnson · Culver City, US
• Victoria A. Poissant · Twin Lakes, US

Key dates

• Filing date: Dec 14, 2021
• Grant date: Sep 27, 2022
• Expiry date: Dec 14, 2041

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61B2562/0238
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

An illustrative optical measurement device includes a light source configured to emit light pulses directed at a target. The optical measurement device further includes a detector configured to detect arrival times for photons of the light pulses after the photons are scattered by the target. The optical measurement device further includes a processing unit configured to generate, based on the arrival times of the photons at the detector, histogram data associated with the target. The processing unit is further configured to determine, based on the histogram data, an absolute optical property associated with the target. The processing unit is further configured to determine, based on the absolute optical property, a blood oxygenation level of the user, and perform an operation based on the blood oxygenation level.