JPS61138495A - Discharge lamp starter - 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 [Technical Field 1] The present invention relates to a discharge lamp starting device, and more particularly to a discharge lamp starting device for starting and lighting a discharge lamp such as a fluorescent lamp.

[Background Art 1 Glow starters have traditionally been used to start and light discharge lamps, but although glow starters have the advantage of being simple, compact, and inexpensive, they are unstable to start and difficult to light. The problem is that it takes time. In order to improve this, various starter circuits using electronic circuits have been provided, but these starter circuits are generally expensive, and circuits using pulse transformers have the problem of being large in size.

Object of the Invention 1 The present invention has been made in view of a series of points, and its main objectives are to provide a simple and inexpensive structure, stable starting, and a short time until lighting. The object of the present invention is to provide a short discharge lamp starting device.

[Disclosure of the Invention] What is shown in FIG. 1 is the basic configuration of the present invention, in which one end of a first filament F1 of a discharge lamp FL (such as a fluorescent lamp) is connected to a commercial power supply AC via a power switch SWp. One end of the second filament F2 is connected to the other end of the commercial power supply AC via a ballast S, which is an inductance element.

A starter circuit S is connected between the other ends of both filaments F1 and F2.
T is inserted. Starter circuit ST has both filaments F
1. Switch element SW and current limiting resistor R inserted between F2
voltage determination means VC that closes the switch element SW when a voltage of a predetermined value or higher is applied to both filaments F1 and F2; and a preheating detection means PH for opening. The set voltage of the voltage determining means VC is set to a voltage value between the power supply voltage and the voltage between the filament F, F7 when the discharge lamp F1- is lit, and a Zener diode, Combination of Zener diode and transistor or SS
S etc. are used. When the power switch SWp is turned on, the voltage between the filaments F1 and F2 is the power supply voltage, so the switch element SW is closed by the voltage determining means VC, and a preheating current flows through the filaments F1 and F2. The preheating detection means PH is a filament)F, ,F,,
It is a delay that measures the time when the filaments F1 and F2 are considered to be sufficiently preheated after turning on the light receiving element that detects the end glow of the discharge lamp Fl- and the power switch SWp. A timer etc. is used. Therefore, after the power source switch SWp is turned on, the switch element SW is opened when the filaments F1 and F2 are sufficiently preheated, and when the switch element SW is opened, the energy stored in the ballast S A high voltage kick pulse is applied between both filaments F, F2, and the discharge lamp FI- is lit. When the discharge lamp FI- is turned on, the voltage between the filaments F1 and F2 drops below the power supply voltage and becomes below the set voltage of the voltage determining means VC, so that the switch element SW remains open. If the discharge lamp FL does not light up, both filament lamps) Fl, F
Since the voltage between 2 becomes equal to or higher than the set voltage of the voltage el+l, the switch element SW is closed again, and after the filaments F1 and F2 are preheated, the switch element SW is opened by the preheat detection means PI-1. A kick pulse is applied to the discharge lamp PL. This operation is continued until the discharge lamp Fl- is lit.

(Example 1) What is shown in FIG. 2 is Example 1, in which the voltage determination means V
A Zener diode Z is used as C, and a thermal relay TH is used as the preheat detection means PI-1. The switch element SW is a contact point r of the latching relay RY, and is connected in series to a series circuit of one of the driving coils C and the Zener diode Z of the latching relay RY, and the other driving coil C2 is a thermal relay. It is connected in series to a series circuit of the contact r1 of TH and the diode D2. Furthermore, the heater I'' of the thermal relay T)T is inserted between both filaments Fl and F2. Therefore, when the power switch SWp is turned on, a voltage higher than the breakover voltage is applied to the Zener diode Z, the drive coil C1 of the latching relay RY is excited, and the contact r is closed.

At this time, the heater I4 of the thermal relay TH is also energized -4
= After a predetermined time, the contact r1 of the thermal relay TI is closed, the drive coil C2 of the latching relay RY is energized, and the contact r is opened. This causes the discharge lamp FL to light up.

(Embodiment 2) What is shown in FIG. 3 is Embodiment 2, in which a heater H of a thermal relay TH is connected in parallel with a resistor R connected in series to a contact r of a latching relay RY. therefore,
Latching relay RY at the same time as power switch SWp is turned on
The contact r of the latching relay RY is closed, and at that time, the heater H of the thermal relay TH is energized, and after a predetermined time, the contact r of the thermal relay TH is closed, the contact r of the latching relay RY is opened, and at the same time, the heater H is turned on. The electricity is also cut off. Here, if the discharge lamp FL does not light up,
Since the voltage across the Zener diode Z exceeds the breakover voltage, the contact r is closed again, the heater H is energized, and the contact r is opened after a predetermined time.
This operation continues until the discharge lamp FL lights up. In other words, restart is reliably performed. In addition, in this circuit, after the discharge lamp is lit, the starter circuit S
No current flows through T, and low power consumption can be achieved.

(Example 3) In Example 3, as shown in No. 4M, preheating detection means P) (
As positive characteristic thermistor PTC and Zener diode Z
I is used. In other words, a series circuit of the Zener diode Z1 and the drive coil C2 of the latching relay RY is connected in parallel with the positive temperature coefficient thermistor PTC, and this parallel circuit is connected in series with the contact r of the latching relay RY.

Therefore, after the power switch SWp is turned on, the contact r of the latching relay RY is opened, and the positive temperature coefficient thermistor PTC
When energized, the resistance value increases due to self-heating of the PTC thermistor PTC, and the voltage across both ends rises. When this exceeds the breakover voltage of the Zener diode Z1, the drive coil C2 is excited and the contact r is opened. Ru. 1:). In this circuit as well, the discharge lamp FI
Since the above operation is repeated until - lights up, the restart is reliably performed.

(Example 4) In Example 4, as shown in FIG.
The Y contacts are two contacts, and the voltage determining means VC is connected through the normally closed contact nc, and the preheating detecting means PH is connected through the normally open contact no. The voltage determining means VC and the preheating detecting means PH have the same configuration as in the third embodiment. Therefore, when the power switch SWp is turned on, the normally closed contact n
Since it is closed on the c side, the voltage determining means VC is energized, the drive coil C1 is excited, and the normally open contact is closed on the no side. When the PTC thermistor PTC is energized in this way, the resistance value increases due to self-heating of the PTC thermistor PTC, and when the terminal voltage rises and exceeds the breakover voltage of the Zener diode Z, the drive coil C2 is energized and the contact is normally closed. Closed to the closing contact ne side. During the transition from the normally open contact no to the normally closed contact ne, a kick pulse is applied to the filaments F1 and F2 of the discharge lamp FL, and the discharge lamp FL lights up.
Since it is separated from L, the kick pulse is the discharge lamp PL.
This makes starting and lighting easier.

(Example 5) In each of the above-mentioned examples, a two-wire latching relay RY having two drive coils C1 and C2 for driving the switch element SW was used, but in Example 5, the drive coil C3 1' wire type latching relay RY with one
An example using . The latching relay RY has a contact r that opens and closes depending on the direction of the current flowing through the drive filter C3.

The one shown in FIG. 6 is a modification of the first embodiment,
A series circuit of Zener diode Z and diode D1 is connected in parallel to a series circuit of diode D2 and contact r of thermal relay TH, and this parallel circuit connects drive coil C2.
A series circuit of a switch element SW and a resistor R, and a heater H of a thermal relay TH are connected in parallel to this series circuit. diode D, and diode D
2 is connected in the opposite direction, and when the forward current of the diode D1 flows to the drive coil C8, the contact r of the latching relay RY is closed, and when the forward direction current of the diode D2 flows to the drive coil C8. Contact r is opened. Further, the contact r of the thermal relay TH is initially open, and when heated by the heater H, the contact r is closed.

Therefore, when the power switch SWp is turned on, the commercial power AC is applied to the series circuit of the diode D1, the Zener diode Z, and the drive coil C3, and a voltage higher than the breakover voltage of the Zener diode L'Z is applied to the Zener diode Z. , the driving filter C1 is energized through the diode D1, and the contact r is closed. At this time, since the heater H is also energized at the same time, the contact r of the thermal relay TH is closed after a predetermined time, and the drive filter C3 is energized through the diode D2 by a half wave.
The contact r, which is the switch element SW, is opened. When the discharge lamp PL lights up here, both filaments F1
, F2 decreases and becomes below the breakover voltage of the Zener diode Z, so that the drive coil C3 is energized only through the diode D2, and the contact point "
is kept open. Although a modified example of the first embodiment is shown here, in the second embodiment, the pair of diodes D1 and D2 are connected in opposite directions, and one diode D
If a circuit in which the contact r1 of the thermal relay TH is connected in series with the drive filter C8 is connected in series with the drive filter C8, the same operation can be performed using a one-wire type latching relay.

(Embodiment 6) As shown in FIG. 7, Embodiment 6 is a modification of Embodiment 5, and includes the same inner and outer diode D2 directly connected to contact r1 of thermal relay TH. D3
are connected in series to the switch element SW.

In this circuit, the diode D1 and the diode D3 are connected in opposite directions, so that the direction of the current flowing through the drive coil C8 and the direction of the preheating current are opposite to each other in the direction of closing the contact r. and the power switch SW
When the current flows through the drive coil C3 in the direction of closing the contact r, no current flows through the contact r, so the contact closes in the next half wave after the contact r is closed. r
When the contact r is closed, no arc is generated and no welding of the contact r occurs.

Therefore, the resistance value of the current limiting resistor R can be set to a small value and the preheating current can be set to a large value, and the starting time can be shortened. In addition, since diode D is inserted in the same direction as diode D2, a preheating current always flows when contact r is opened, and contact r will not be opened near zero volts, ensuring kick. The problem can be solved by generating a pulse. Note that the diode D connected in series to the contact r can also be applied to the circuits of Embodiments 1 to 4, and the same effect can be obtained.

In each of the above embodiments, a Zener diode Z is used as the voltage determining means VC, but a 5S81 Schottley diode, a glow lamp, a neon tube, etc. may also be used. In addition, although an example is shown in which a thermal relay TH or a positive temperature coefficient thermistor PTC is used as the preheating detection means PH, a time constant circuit using a capacitor and a resistor may be used to delay the end glow of the discharge lamp FL. It may be detected by a phototransistor to determine whether or not it is preheated.

[Effects of the Invention] As described above, the present invention is characterized in that one end of the first filament of the discharge lamp is connected to one end of the commercial power supply, and one end of the ballast including the inctance element is connected to one end of the second filament. , in a discharge lamp starting device in which the other end of the ballast is connected to the other end of the commercial power supply, and a starter circuit is connected between each other end of both filaments F, the starter circuit is connected between each other end of both filaments. It is composed of an inserted switch element, a voltage determining means that forms a switch element when the voltage across the discharge lamp is equal to or higher than a predetermined value, and a preheating detection means that opens the switch element after the filament is preheated. Because of this, it can be realized with a simple configuration and at low cost, and since the switch element is opened to start the discharge lamp after detecting that sufficient preheating has been achieved by the preheating current, starting can be performed stably. Moreover, there is almost no need to restart.
This has the advantage that the time until lighting can be shortened.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing the basic configuration of the present invention, Fig. 2 is a circuit diagram showing Embodiment 1 of the above, and Fig. 3 is Embodiment 2 of the same.
FIG. 4 is a circuit diagram showing Example 3 of the same as above,
FIG. 5 is a circuit diagram showing the fourth embodiment, FIG. 6 is a circuit diagram showing the fifth embodiment, and FIG. 7 is a circuit diagram showing the sixth embodiment. AC is a commercial power supply, Fl is a first filament F, F2 is a second filament, PL is a discharge lamp, PH is a preheat detection means, ST is a starter circuit, SW is a switch element, and VC is a voltage determination means. Agent Patent Attorney Ishi 1) Long 7th Procedural Amendment (Spontaneous) October 31, 1985 Patent Application No. 260, 1985,'! '29 No. 2, Name of the invention: Discharge lamp starting device 3, Relationship with the amended person's case Patent applicant address: 1048 Kadoma, Kadoma City, Osaka Prefecture Name (58
3) Matsuto Electric Works Co., Ltd. Representative Fujii 1 Husband 4 Agent postal code 530 Address 1-12-17-5 Umeda, Kita-ku, Osaka City Date of amendment order Vol. 6 Inventions increased by amendment Number None 1) Insert "Open-1" next to [Fl, F2J on page 3, line 8 of the specification of the present application. 2) Delete the entire text on page 12, line 7 of the same as above, and [Also, half-wave Because it is a preheating method," is inserted.

Claims (1)

[Claims] (1) One end of the first filament of the discharge lamp is connected to one end of the commercial power supply, one end of the ballast including an inductance element is connected to one end of the second filament, and the other end of the ballast is connected to one end of the commercial power supply. In a discharge lamp starting device in which a starter circuit is connected between each other end of both filaments, the starter circuit includes a switch element inserted between each other end of both filaments, and a voltage across the discharge lamp. 1. A discharge lamp starting device comprising: voltage determining means that closes a switch element when is equal to or greater than a predetermined value; and preheating detecting means that opens the switch element after a filament is preheated.