Hair styling using dielectric heating

Abstract

In a hair styling device (100) comprising electrodes (102) for applying a radio-frequent signal to hair, a frequency of the radio-frequent signal is between 50 MHz and 90 MHz. Preferably, a voltage of the radio-frequent signal does not exceed 30 V, while a voltage not exceeding 10 V would work well in a configuration that applies another heat source (103) for heating hair up till a first temperature that is no more than 150° C. (and thus lower than a critical temperature at which hair cuticle damage will occur), and the radio-frequent electrodes (102) for in combination with heat from the other heat source (103)—selectively heating a hair cortex to a second temperature exceeding the first temperature and sufficiently high for hair styling.

1 . A hair styling device comprising
 electrodes for applying a radio-frequent signal to hair,   
       characterized in that a frequency of the radio-frequent signal is between 50 MHz and 90 MHz. 
     
     
         2 . The hair styling device as claimed in  claim 1 , wherein a voltage of the radio-frequent signal does not exceed 30 V. 
     
     
         3 . The hair styling device as claimed in  claim 2 , wherein the hair styling device further comprises heat source different from the electrodes for heating hair up till a first temperature that is no more than 150° C., and wherein a voltage of the radio-frequent signal does not exceed 10 V.