Dimming control system for electronic ballasts

Details Dimming control system for electronic ballasts Dimming control system for electronic ballasts

H - Electricity

05

B

H05B 37/02 (2006.01) H05B 41/38 (2006.01) H05B 41/392 (2006.01)

Patent

CA 2399777

A dimming control system includes a first circuit and a second circuit. First circuit is coupled in series with the AC line source and receives brighten and dim commands from a user. The brighten and dim commands are communicated to second circuit by momentarily altering the AC voltage waveforms observed by second circuit. Second circuit provides an adjustable dimming control voltage that is coupled to existing dimming control circuitry within an electronic dimming ballast. The dimming control voltage is adjusted by the second circuit in dependence on the observed AC voltage waveforms.

Un système de commande de gradation comprend un premier circuit et un second circuit. Le premier circuit est accouplé en série avec la source de ligne c.a. et il reçoit des commandes de luminosité et de gradation d'un utilisateur. Ces commandes sont communiquées au second circuit en modifiant momentanément les formes d'ondes de tension c.a.. observées par le second circuit. Le second circuit fournit une tension de commande gradation réglable accouplée au circuit de gradation existant du ballast de gradation électronique. La tension de commande de gradation est réglée par le second circuit, à l'égard des formes d'ondes de tension c.a. observées.

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