US 10,376,164 B2
Vital signs sensor and method of measuring vital signs of a user
Cristian Nicolae Presura, Veldhoven (NL); and Andrei Nicolae, Eindhoven (NL)
Assigned to KONINKLIJKE PHILIPS N.V., Eindhoven (NL)
Appl. No. 15/763,474
Filed by KONINKLIJKE PHILIPS N.V., Eindhoven (NL)
PCT Filed Sep. 28, 2016, PCT No. PCT/EP2016/073030
§ 371(c)(1), (2) Date Mar. 27, 2018,
PCT Pub. No. WO2017/055307, PCT Pub. Date Apr. 6, 2017.
Claims priority of application No. 15187156 (EP), filed on Sep. 28, 2015.
Prior Publication US 2018/0303358 A1, Oct. 25, 2018
Int. Cl. A61B 5/00 (2006.01); A61B 5/024 (2006.01); A61B 5/026 (2006.01); A61B 5/0295 (2006.01); A61B 5/1455 (2006.01)
CPC A61B 5/02427 (2013.01) [A61B 5/7214 (2013.01); A61B 5/0082 (2013.01); A61B 5/0261 (2013.01); A61B 5/0295 (2013.01); A61B 5/14551 (2013.01); A61B 2562/0238 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An optical vital signs sensor configured to measure vital signs of a user, the optical vital signs sensor comprising:
a light source configured to generate light at at least three wavelengths (Y1−Y3) which is directed towards a skin of the user, wherein the first, second and third wavelengths (Y1−Y3) are arranged approximately around 550 nm, wherein the second wavelength (Y2) is arranged equidistantly between the first wavelength and third wavelength (Y1,Y3),
a photo detector configured to detect an intensity of light at the at least three wavelengths, wherein said light is indicative of a reflection of light emitted in or from the skin of the user, and
a computer that performs motion correction to correct motion artifacts from the light intensity detected by the photo detector, wherein performing the motion correction includes subtracting the light intensity detected at the second wavelength from an average of the light intensity detected at the first wavelength (Y1) and that at the third wavelength (Y3).