H - Electricity – 05 – B
Patent
H - Electricity
05
B
H05B 37/00 (2006.01) H05B 37/03 (2006.01)
Patent
CA 2548839
The present invention relates to an apparatus for safely connecting the lamp to the equipment voltage ground, which comprises a rectification circuit for rectifying the power supply alternating voltage into a direct voltage, and an oscillating circuit for converting said direct voltage into alternating voltage for driving the lamp to work, wherein said oscillating circuit comprises the DC-blocking capacitor, the oscillating inductor and the oscillating capacitor orderly connected in series, and one end of said DC-blocking capacitor is connected to the output rectification voltage of said rectification circuit, and another end thereof is connected to said oscillating inductor, while one end of said oscillating capacitor is connected to the equipment voltage ground, and another end thereof is connected to the working voltage terminal of the lamp. According to the present invention, the ground terminal of the lamp is electrically connected to the equipment voltage ground through a parallel circuit formed of a switch and a high impedance capacitor, wherein said switch is controlled by the control circuit provided within said apparatus to be closed only after the lamp is normally ignited, and to keep open under other states, so that the housing of the lamp will not have dangerous voltage.
Gao Angle
Twardzik Rene
Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen Mbh
Smart & Biggar
LandOfFree
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