18711889. HAIR-CUTTING HEAD AND HAIR-CUTTING DEVICE (KONINKLIJKE PHILIPS N.V.)
HAIR-CUTTING HEAD AND HAIR-CUTTING DEVICE
Organization Name
Inventor(s)
MARIUS IOSIF Boamfa of VELDHOVEN (NL)
BABU Varghese of EINDHOVEN (NL)
HAIR-CUTTING HEAD AND HAIR-CUTTING DEVICE
This abstract first appeared for US patent application 18711889 titled 'HAIR-CUTTING HEAD AND HAIR-CUTTING DEVICE
Original Abstract Submitted
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.