The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 07, 2026
Filed:
Nov. 17, 2022
Koninklijke Philips N.v., Eindhoven, NL;
Marius Iosif Boamfa, Veldhoven, NL;
Babu Varghese, Eindhoven, NL;
KONINKLIJKE PHILIPS N.V., Eindhoven, NL;
Abstract
A hair-cutting head () for a hair-cutting device () having two sets () of light sources which are configured to emit light predominantly in different respective wavelength bands. A first set () emits light in a wavelength band of 400-500 nm. A second set () emits light in a wavelength band of 500 nm and above. For improved eye safety, the first set of light sources is arranged so that its light output is projected onto the user's skin () during operation only via a central region () of a skin-contacting area () of the hair-cutting head (). The second set () of light sources is arranged so that its light output is provided on the user's skin during operation only via a peripheral region () of the same skin-contacting area. This arrangement aims to make it more likely that the light of the first set () of light sources is fully shielded by the contact of skin to the hair-cutting head during normal operation, protecting the eyes from this light.