Starting circuit for low-pressure discharge lamp, such as a comp

Details Starting circuit for low-pressure discharge lamp, such as a comp Starting circuit for low-pressure discharge lamp, such as a comp

1984-03-19

1986-05-13

Dixon, Harold

Electric lamp and discharge devices: systems

With cathode or cathode heater supply circuit

Discharge device and/or rectifier in the cathode or heater...

315 99, 315105, 315107, H05B 3900

Patent

active

045889252

ABSTRACT:
To provide for reliable starting of compact-type fluorescent lamps, or ot discharge lamps difficult to start, a voltage divider which is formed only by serially connected capacitors (C1, C2) is connected across the lamp (L), the junction point (5) of the voltage divider being connected to a charging circuit formed by a resistor (R1) and a capacitor (C3). The junction (4) between the charging resistor and capacitor (R1, C3) is connected through a diac (D) to the trigger or gate electrode (3) of a triac (T) connected across the lamp. Preferably, the capacity relationship of each one of the capacitors (C1, C2) of the voltage divider to the trigger capacitor (C3) is between about 1:1 and 1:5, desirably about 1:3. The time constant formed by the charge circuit (R1, C3), preferably, is between about 4 to 6 milliseconds, so that the charge time of the trigger capacitor (C3) is sufficiently long to provide multiple starting pulses to the triac (T) at peak values. A circuit to provide for polarity independence (FIG. 2: G, R2) can be connected between the diac junction (4) and the charge capacitor (C3).

REFERENCES:
patent: 3482142 (1969-12-01), Cluett et al.
patent: 3643127 (1972-02-01), Laupman
patent: 3746919 (1973-07-01), Laupman
patent: 3924155 (1975-12-01), Voegli
patent: 4460848 (1984-07-01), Fahnrich et al.

Affiliated with

Also associated with

Rating

Starting circuit for low-pressure discharge lamp, such as a comp does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Starting circuit for low-pressure discharge lamp, such as a comp, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Starting circuit for low-pressure discharge lamp, such as a comp will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1772161