Patent ID: 11857299
Assignee: POLAR ELECTRO OY
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 0:
1. A wearable heart activity sensor device comprising:
a substrate of optically transparent material arranged to face a skin of a user when the sensor device is worn by the user;
at least one light emitting diode (LED) arranged on the substrate and arranged to emit light through the substrate, wherein the at least one LED comprises a first set of LEDs arranged to emit light at a first wavelength and a second set of LEDs arranged to emit light at a second wavelength different from the first wavelength, and wherein the first set and second set of LEDs are arranged spatially in pairs such that each pair comprises an LED of the first set and an LED of the second set disposed directly next to one another on the substrate, wherein different pairs of LEDs are spatially separated on the substrate;
at least one photo sensor arranged on the substrate as spatially separated from the at least one LED and arranged to absorb light through the substrate, wherein the at least one LED and the at least one photo sensor are comprised in a photoplethysmogram sensor of the heart activity sensor device, and wherein the at least one photo sensor comprises a plurality of photo sensors, and wherein at least one pair of LEDs is disposed between the plurality of photo sensors, and wherein at least two pairs of LEDs are disposed between opposite sides of one of the plurality of photo sensors; and
an overmold of thermoplastic material covering the at least one light emitting diode, the at least one photo sensor, a space between the at least one light emitting diode and the at least one photo sensor, and a space between the different pairs of LEDs, wherein the overmold of thermoplastic material is optically non-transparent.