Bulb type detector for dimmer circuit and resistance and...

H - Electricity – 05 – B

Patent

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Details

H05B 37/02 (2006.01) H05B 39/04 (2006.01) H05B 41/38 (2006.01)

Patent

CA 2685259

A bulb detection circuit is associated with a dimmer circuit for a lighting system. The bulb detection circuit is operable to detect whether an incandescent or a fluorescent bulb is received in an electric light socket. The socket may be hardwired to the circuit, or could be plugged into an electrical outlet. The bulb detection circuit may utilize a separately inventive method of measuring the resistance by looking at an RC circuit time constant. Further, the bulb detection circuit may utilize a separately inventive method of identifying a short circuit by again looking at the RC circuit time constant.

L'invention concerne un circuit de détection d'ampoule associé à un circuit de gradation destiné à un système d'éclairage. Le circuit de détection d'ampoule est capable de détecter si une ampoule à incandescence ou une ampoule à fluorescence est reçue dans une douille électrique d'éclairage. La douille peut être reliée par fil au circuit, ou peut être branchée dans une prise électrique. Le circuit de détection d'ampoule peut utiliser un procédé distinct de l'invention permettant de mesurer la résistance en observant une constante de temps de circuit RC. De plus, le circuit de détection d'ampoule peut utiliser un procédé distinct de l'invention consistant à identifier un court-circuit en observant à nouveau une constante de temps de circuit RC.

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