Patent ID: 8667692

Claim:
An electric hair removal apparatus to shave hair, comprising: a housing; a hair removal device coupled to the housing comprising a shaving head which comprises an undercutter and a foil; a drive motor operable to drive the undercutter of the hair removal device; and a controller that regulates the operational speed of the drive motor based on a setting selected by a user and by a light sensor that generates a signal to the controller that regulates the operational speed of the hair removal device's drive motor to a predetermined value based on the speed at which the hair removal device is moved over the skin, wherein the light sensor comprises a light source, in which the light source is arranged to illuminate the skin while the hair removal device is moved over the skin, wherein said selected setting causes the hair to be cut by the undercutter before said hair is pulled out of the skin by the foil by a distance greater than about 0.4 mm due to the speed the hair removal device is moved over the skin.