JPS5851497A - Device for firing discharge lamp - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a discharge lamp lighting device for lighting a discharge lamp such as a fluorescent lamp using a glow lamp lighting tube.

In order to turn on and off the discharge lamp with a light touch using a push button provided on the wall, it is necessary to control a switching element connected in series with the discharge lamp by a control circuit.

For this purpose, the control circuit that is operated at any given time must always be powered on and in a standby state.

The discharge lamp has a high impedance when it is turned off, so that the control circuit cannot be energized by power from the power supply through the lamp when it is turned off. Therefore, in the past, troublesome wiring work had to be performed in order to energize the control circuit.

An object of the present invention is to provide a discharge lamp lighting device that can constantly energize a control circuit for controlling semiconductor switching elements connected in series to a discharge lamp and keep it in a standby state by simple wiring work. The goal is to provide the following.

FIG. 1 is an electrical circuit diagram of an embodiment of the present invention. A discharge lamp such as a fluorescent lamp is a pair of filamen)! 112.3
has. A glow lighting tube 6 is connected between one terminals 4 and 5 of these filament electrodes 2 and 3. A noise prevention capacitor 7 is connected in parallel to this glow lighting tube 6.
is connected.

The capacitance of the noise prevention capacitor 7 is in accordance with Japanese Industrial Standards Te Gt.
o, 06 μF. filament electrode 2,
The other terminal 8.9 of 3 is connected to a choke 10, a triac 11 as a semiconductor switching element, and a current transformer 12.
It is connected to the commercial AC power supply 13 via.

The voltage across the triac 11 and the primary coil 14 of the current transformer 12 is applied to a voltage doubler rectifier circuit 17 via a line 15.16. The voltage doubler rectifier circuit 17 includes diodes 18 and 19, a capacitor 20, and a resistor 21. The output from the voltage doubler rectifier circuit 17 is on line 22.23
The control circuit 24 &: is provided via the control circuit 24&:. This line 22
．． The output from the secondary coil 25 of the current transformer 12 is rectified and passed through a diode 26 and is applied to the current transformer 23 . The control circuit 24 is thus powered by the output from the voltage doubler rectifier circuit 17 and the output from the current transformer 12 via the diode 26.

The control circuit 24 is provided with a push button 27 that is manually operated and has a light operating feel, and each time the push button 27 is pressed, the toggle 7 lip 70 128 alternates between stable states. 71J tube 70 tube 28 is line 22.
Powered by power from 23. When the 7 lip 70 knob 28 is in one stable state, the photocoupler 2
9 neon bulb 30 lights up. The light from the neon bulb 30 is received by the photothyristor 31, so that the photothyristor 31 becomes conductive. Due to the conduction of the photothyristor 31, the trigger 11 is activated via the full-wave rectifier circuit 32.
A current flows through the gate of the triac 11, and the triac 11 is fired.

Assume that the seven-lip prop 28 is in the other stable state, the neon bulb 30 is off, the torch 11 is therefore off, and the discharge lamp 1 is off. In this case, the current from the AC power supply 13 is
It flows through anti-noise capacitor 7 and lines 15-16. Therefore, the voltage doubler rectifier circuit 17
．． 23 to the voltage 2 which is twice the voltage vl between the lines 15.16
・Generates Vl. This will result in 7 lips, 70 tubes, and 28
is energized and on standby. This line 22.23
The voltage waveform between is as shown in FIG.
Before the time t1 when the push button 27 is operated, the pulsating frequency between the lines 22 and 23 is twice the frequency of the AC power source 13, and when the AC power source 13 is 60H2, the pulsating frequency between the lines 22 and 23 is twice the frequency of the AC power source 13. is 120 Hz.

When push button 27 is operated at time t1, 7 lip 70
The stable state of the knob 28 changes to one stable state, the neon bulb 30 lights up, the thyristor 31 becomes conductive, and the triac 11 fires. Therefore, the discharge lamp 1 starts discharging due to the operation of the lighting tube 6 and lights up. When the switch 11 is conducting, the voltage across the lines 15, 16 becomes very low and the output voltage of the voltage doubler rectifier circuit 17 is not sufficient to operate the 7-lip flop 28. In this state, the discharge current of the discharge lamp 1 is flowing through the primary coil 14 of the current transformer 12, and therefore the secondary coil ILI25
The current induced in is rectified by the diode 26,
given on line 22.23. In this manner, while the discharge lamp 1 is lit, the 7 lip 70 tube 28 is energized by the power from the current transformer 12. Thus line 22
．． The output voltage pulsation of 23 is 60 Hz.

When the push button 27 is operated again, the other stable state of the 7 lip 70 knob 28 changes, the neon bulb 30 goes out, the thyristor 31 goes out, the triac 11 goes out, and the discharge lamp 1 goes out. After this, voltage doubler rectifier circuit 1
The 7rip 7ship 128 is energized by the output from the 7rip 7s and is in a standby state.

In the embodiment shown in the first figure, the circuit portions on the right side of the terminals 33 and 34 (i.e., the current transformer 12, the voltage doubler rectifier circuit 17, the control circuit 24, and the diode 26) are unitized, and the conventional wave Since it can be connected in place of a switch or the like, wiring work is extremely simplified.

In other embodiments of the invention, control circuit 28 may have other configurations, in which case current transformer 12 may be omitted.

As described above, according to the present invention, the energizing power for the control circuit is obtained by the voltage doubler rectifier circuit via the noise prevention capacitor provided in connection with the discharge lamp.
The control circuit can be constantly energized and in a standby state without requiring complicated wiring.

[Brief explanation of drawings]

FIG. 1 is an electrical circuit diagram of an embodiment of the present invention, and FIG. 2 is a waveform diagram for explaining its operation. 1... Discharge lamp, 2, 3... Filament electrode, 6...
・・Glo-1 lighting tube, 7・・Noise prevention capacitor, 1
0...Choke, ll...Triac, 12...
・Current transformer, 17... Voltage doubler rectifier circuit, 24... Control circuit, 26... Diode agent Patent attorney Kei Nishi Partial procedural amendment Commissioner of the Japan Patent Office Tono 11 case indication patent application 1982- 135268 2% Name of the invention Discharge lamp lighting device 3, Relationship to the person making the amendment Applicant address name (583) Matsushita Electric Works Co., Ltd. Representative 4, Agent address 1-13-38 Nishihonmachi, Nishi-ku, Osaka-shi Shin Kosan Building 6, Information on the scope of claims, Detailed Explanation of the Invention and Drawings 7, Contents of Amendment (1) The scope of claims should be on paper. (2) In the specification @ page 2, line 20, r O, 06
Correct the text "μF" to "rO,006μF". (3) In the 7th line of the specification d, 3j, 7th line, replace ``The voltage is given to the voltage high current circuit 17'' with ``The voltage doubler that includes the noise prevention capacitor 7 and functions as a voltage doubler. is given to the rectifier circuit 17.'' (4) In the second line of page 6, r60Hz.
Correct 81 to r120m (ZJ. (5) Correct ``control rotation i@28J'' to ``r 1tiJ control circuit 24'' in the 16th line of #14 thin groom @ 6 shell fJ. (ti) ] On page 6, line 20 of Hokkaido, “p#I
+h via a noise prevention capacitor J is changed to "double which includes a noise prevention capacitor and functions as a voltage doubler rectifier circuit"
Apply T pressure. A noise prevention capacitor is connected in parallel to the glow tube connected between one terminal of each of the filament ionizers of a pair of special ifFm lamps, and the other terminal of each filament electrode is connected between the choke and the a″f4 is connected to the semiconductor switching element through the terminal, and the voltage across the semiconductor switching confectionery is I11.
Including sound prevention capacitor f? ! A discharge lamp lighting device characterized in that power is applied to a voltage doubler rectifier circuit having voltage distortion current capability, and a circuit for controlling semiconductor switching is energized by an output from the voltage rectifier circuit. .

Claims (1)

[Claims] A noise prevention capacitor is connected in parallel to the lighting tube connected between one terminal of each of a pair of filament electrodes of the discharge lamp, and the other terminal of each filament electrode is connected through a choke and a semiconductor switching element. The voltage across the semiconductor switching element is applied to a voltage doubler rectifier circuit, and the output from the voltage doubler rectifier circuit powers a circuit for controlling the semiconductor switching element. Discharge lamp lighting device.