Stepless dimming fluorescent lamp and ballast thereof

Details Stepless dimming fluorescent lamp and ballast thereof Stepless dimming fluorescent lamp and ballast thereof

H - Electricity

05

B

H05B 41/392 (2006.01) H01J 61/56 (2006.01) H05B 41/02 (2006.01) H05B 41/24 (2006.01)

Patent

CA 2623767

A fluorescent lamp adapted for effecting stepless dimming with a regular SCR dimmer, comprising a filter and rectifier circuit (1), a DC high voltage stabilizing circuit (2), a voltage signal detection and frequency control circuit (6), a lamp load (4), a lamp current feedback circuit (5) and a voltage signal sampling circuit (3) thereby changing the power factor and luminous intensity of the lamp in accordance with the variation of the conduction phase angle of the silicon controlled rectifier dimmer. The present invention solves the discontinuity and instability issues in course of dimming operation and is particularly adapted for use in an integrated compact fluorescent lamp.

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