A - Human Necessities – 61 – B
Patent
A - Human Necessities
61
B
A61B 18/18 (2006.01) A61N 5/06 (2006.01) G05F 1/02 (2006.01)
Patent
CA 2545884
The invention relates to a hair-removal device which is intended for local skin application. The inventive device is designed to emit at least one light pulse which is generated by an electric current impulse that passes through a flash lamp (LF) such as to form an electric arc, said current originating from the discharge of a capacitor (CE) and being controlled by a fast-switching electronic switch (SW). According to the invention, the aforementioned three elements are disposed in a main loop (CE-SW-LF). During each capacitor discharge, the current passing through the lamp generates a measurement signal (URm) which is representative of said current and which is compared to a reference value (Uref) by a hysteresis comparison device (COMP), in order to control the open or closed state of the switch and to adjust the current by means of the high-frequency cut-off thereof around a determined intensity (Icritic) throughout essentially the entire duration of the current impulse.
Appareil d~épilation pour applications cutanées et locales, adapté pour émettre au moins une impulsion lumineuse générée par une impulsion de courant électrique traversant une lampe flash (LF) en y formant un arc électrique, ce courant provenant de la décharge d~un condensateur (CE) et étant commandé par un interrupteur électronique (SW) à commutation rapide, ces trois éléments étant disposés en une boucle principale (CE-SW-LF). Pendant chaque décharge du condensateur, le courant traversant la lampe génère un signal de mesure (Urm) représentatif du courant, qui est comparé à une valeur de référence (Uref) par un dispositif de comparaison à hystérésis (COMP) pour commander l'état ouvert ou fermé de l~interrupteur et réguler le courant par son découpage haute fréquence autour d~une intensité déterminée (Icritic) durant sensiblement toute la durée de l~impulsion de courant. L~invention a également pour objet un procédé de mise en .oelig.uvre de cet appareil.
Brottier Yves Vincent
Hugueny Alain Marie
Brottier Yves Vincent
Fetherstonhaugh & Co.
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