US 12,213,853 B2
Tooth whitening system
Tianyi Wang, Kenmore, WA (US)
Assigned to KONINKLIJKE PHILIPS N.V., Eindhoven (NL)
Appl. No. 17/771,239
Filed by KONINKLIJKE PHILIPS N.V., Eindhoven (NL)
PCT Filed Oct. 20, 2020, PCT No. PCT/EP2020/079412
§ 371(c)(1), (2) Date Apr. 22, 2022,
PCT Pub. No. WO2021/078696, PCT Pub. Date Apr. 29, 2021.
Claims priority of provisional application 62/924,203, filed on Oct. 22, 2019.
Prior Publication US 2023/0000604 A1, Jan. 5, 2023
Int. Cl. A61C 19/06 (2006.01); H05B 45/22 (2020.01); H05B 47/105 (2020.01)
CPC A61C 19/066 (2013.01) [H05B 45/22 (2020.01); H05B 47/105 (2020.01)] 16 Claims
OG exemplary drawing
 
1. A tooth whitening system, comprising:
a light source;
a light detector; and
a processing unit;
wherein the light source and detector are housed in a body, and the body is configured to be placed adjacent to at least one of a user's teeth;
wherein, the light source is configured such that a wavelength of the light emitted is adjustable over a wavelength range of operation;
wherein, the detector is configured to detect light emitted from the light source that is transmitted and/or reflected and/or scattered from the at least one of the user's teeth;
wherein, the processing unit is configured to:
control the light source to adjust the wavelength of the light emitted by the light source, and
determine a measure of absorption for different wavelengths on the basis of the detected light for the different wavelengths; and
wherein, the processing unit is configured to utilize the determined measure of absorption to operate the light source at a wavelength at a peak in absorption.