JPS58103764A - Low-pressure mercury-vapor electric-discharge lamp device - Google Patents

Abstract

PURPOSE:To obtain a small light low-pressure mercury-vapor electric-discharge lamp device, which has an increased tolerance of lamp design, by providing a starting auxiliary circuit which is constituted by connecting one end of a starting auxiliary electrode to a circuit, which connects an electric-discharge lamp and a power source, through diodes and a resistor. CONSTITUTION:The symbol 7 represents a conductive starting auxiliary electrode which is projectingly provided in almost the center between a pair of electrodes 2a and 2b. In such a starting auxiliary circuit 77, one end of the electrode 7 which is located outside a lamp 1, extends through a resistor 8, and is connected to a circuit connecting the cathodes of two diodes 20a and 20b. In addition, the anode of the diode 20a is connected between a resistance stabilizer 9a and one end of a power source 6, while the anode of the diode 2b is connected between a resistance stabilizer 9b and the other end of the power source 6.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a low pressure mercury vapor discharge lamp device equipped with a starting assist circuit. Low-pressure mercury vapor discharge lamps such as fluorescent lamps have negative resistance peculiar to arc discharge, so in order to light these discharge lamps and maintain stable discharge, a ballast must be installed in series with the discharge lamp. In addition to connecting the current limiting element that can be avoided.

A start-up assist mechanism is required to apply sufficient voltage to initiate pH during start-up.

FIG. 1 shows a typical preheating starting type lighting circuit configuration of a low-pressure mercury vapor discharge lamp 9, such as a fluorescent lamp. That is, in FIG. 1, when the stain pressure is applied from the 9M source (6), the contact point of the glow nut (4) closes, and the electrode (2a)
, (2b) is preheated to the primary stage, Kronutata (41
By opening the contacts of choke coil ballast f5
Due to the inductance L of the choke coil at both ends of 1,
A high pulse voltage of -Lπ is induced, and this voltage starts the fluorescent lamp (1). The fluorescent lamp (1), which has started discharging in this way, has a choke coil ballast (5) connected in series, which acts as a current limiting element, resulting in a stable
sustain.

A discharge lamp device using such a choke coil as a ballast (5) has been widely used since it has extremely excellent starting characteristics and discharge stability. However, the only drawback is that it is a bit bulky and heavy. Therefore, in order to expand the field of use of the fluorescent lamp (1), the shapes of the fluorescent lamp (1) and the ballast (5) have been made more compact.

When trying to obtain a discharge lamp device that could replace an incandescent light bulb, the size and weight of the ballast (5) were a major obstacle. Therefore, if a resistor is used as a small and lightweight ballast (5) in place of the choke coil described above, unlike a choke coil, it will not be possible to obtain the high induced voltage required to start the fluorescent lamp (1). There is a problem in that the fluorescent lamp +11 has poor startability. Furthermore, when the lamp is turned on with a normal commercial power supply, there is a rest period (TO) of the lamp tube current (E2) with respect to the city pressure (El), as shown in Figure 2.
There is also the problem that the tube voltage (E2) of the lamp (1) is distorted, especially the restriking voltage (EH) becomes high, and the discharge during operation becomes unstable.

For this reason, the fluorescent lamp (1) used has to be extremely limited, that is, the length between the electrodes is short compared to the tube diameter of the lamp (1), so that it has to have a shape that facilitates discharge. Therefore, the design margin of the lamp (I+) was poor, and it was insufficient as a compact and lightweight discharge lamp device.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a low-pressure mercury vapor discharge lamp device that is small and lightweight and has increased latitude in lamp design.

This invention relates to a low-pressure mercury vapor discharge lamp having a pair of electrodes and a ballast, which is a current-limiting element, connected in parallel to a power source in series, in which the ballast is disposed on both sides of the discharge lamp and the lamp. At the same time, an auxiliary starting pole is installed inside the lightning lamp, and one end of this auxiliary starting pole is connected to a diode and a circuit connecting the discharge lamp to the lightning and sand through a resistor, thereby providing a starting auxiliary circuit. It is characterized by:

An embodiment of the present invention will be described below with reference to FIGS. 3 and 4. In these figures, ff71 is a starting assist circuit. Reference numeral (7) denotes a starting auxiliary pole made of a conductive material and protruding from a substantially central position between a pair of electrodes (za) and (zb) provided at both ends of the fluorescent lamp f11.

This starting auxiliary circuit σ7I connects one end of the starting auxiliary pole (7) outside the lamp illumination via a resistor (8) between the cathodes of two diodes (2oa) and (zob). At the same time, one diode (2
The anode of Oa) is connected between the resistance ballast (9a) and one of the diodes (6), and the anode of the other diode (20b) is connected between the resistance ballast (9b) and the other of the room temperature (6). connected and configured. Note that other symbols in FIG. 1 indicate the same or corresponding parts as those in FIG. 1 above.

Next, the operation of the lLi1 city lighting device having the above configuration will be explained. When the normal pressure of M: m (61 is applied, the contacts of the glow starter (41) are closed and the electrodes (2a), (2b) are preheated, and then the contacts of the glow starter (4) are opened, thereby causing the electrodes (2a), ( 2b) A power supply voltage is applied between.

At this time, for each cycle of electric lightning pressure, that is, when one electrode (2a) is in an anode cycle, +7l-(8)-
In the path (20a), when the other electrode (2b) is in the anode cycle, the starting auxiliary electrode (7) also acts as an anode in the path (7i - (81 - (2ob)), so the actual distance between the electrodes is , when the electrode (2a) is in the anode cycle, it is the distance between the electrode (2b) of the cathode cycle (lil) and the starting auxiliary electrode (7).On the other hand, when the electrode (2b) is in the anode cycle, it is the electrode on the cathode cycle side ( This is the distance between the electrode (2a) and the starting auxiliary pole (7). Therefore, the electric field strength between this is approximately twice that between the electrode (2a) and (Z). Moreover, the resistance stabilizer (qa), (q Both electrodes ('') +
Since it is placed on the (2b) side, a symmetrical lightning and field distribution can be obtained for each cycle. Therefore, when the electrode (2a) is in the anode cycle, it is connected to the electrode (2b) on the cathode cycle side and the starting auxiliary pole (7). ) a partial discharge is generated between the two. Then, in the next half cycle, a partial discharge is similarly generated between the electrode (2a) and the starting auxiliary pole (7). electrode (2a) by such partial discharge.

Ionization between the electrodes (2b) is promoted, and at the same time as a partial discharge occurs, a total discharge connecting both electrodes (2a) and (2b) is obtained. After the lamp (1) starts, the starting auxiliary circuit ση
is when the electrode (2a) is in the anode cycle (71-(8
During the electrode (2b) cuff cycle, part of the electrons are dissociated through the path (71-(8)-(zob)), so the starting auxiliary circuit Cl
Compared to the conventional device without 71, the discharge resistance of the lamp (1+) during restriking is smaller, so the resistance ballast (9a)
, (9b), the lamp restriking voltage (E in Fig. 2)
The stability of lightning discharge can also be improved without increasing H). In this case, the starting auxiliary pole f7? ) The resistance value of the resistor (8) connected to the resistor (8) is not particularly limited, but a value of approximately 03 to 100 Ω has been effective in practice. This resistor (
If the resistance value atb of 8) is too high, the snow pressure drop at this resistor (8) will be too sharp and the effect will be insufficient. On the other hand, if it is too low, the electrode (2a) will receive too much electron flow. (+
b) The total discharge became unstable.

1. In the above embodiment, the resistor (8) between the starting auxiliary circuits is connected between one end of the starting auxiliary pole (7) outside the lamp (ll) and the cathode sides of the diodes (2oa) and (2ob). However, it is not limited to this particular position.

It suffices if it is located at a position within the plane of the starting auxiliary circuit that limits the electron flow flowing through the starting auxiliary pole (7).

As shown in Figure 5, the starting auxiliary circuit surface has a starting auxiliary pole (
One end of the outside of the lamp (1) of 7) is connected between the cathode sides of the diodes (20a) and (20b) via the resistor (8), and the diodes (20a) and (20b) are connected together.
The anode side of each diode (2Oa) can be connected in parallel with a lamp (41). (9a) and the other diode (20b
) was connected between the resistance stabilizer (9b) and the power source (61), each of which had the same effect as the above embodiment.

Furthermore, in the above embodiment, the protruding position of the auxiliary starting pole (7) was set at the center between the electrodes (2a) and (2b), but the position of the protruding auxiliary starting pole (7) was set at the center between the electrodes (2a) and (2b). Similarly, if the electrode (2b) and the starting auxiliary pole (7) are too far apart, the electric field strength between them will weaken, while if they are too close, full discharge may not be reached. ) was most effectively provided approximately at the center between the pair of N poles (2a) and (2b). However, the practical range is not limited to the central portion.

FIG. 7 shows another embodiment in which the starting auxiliary pole (7) is provided on the stem 03 of one electrode (2a), and unlike the above embodiment shown in FIG. Even if the tip (7a) is not connected to both electrodes (2a) and (2b
), and the surface area from the tip (7a) of the starting auxiliary pole (7) to the stem u3 (7) is electrically insulated, which is effective.

Also in the above example. We have described the case of a resistance ballast as a current-limiting element, but in addition to resistance ballasts, there are also inductive reactor elements and capacitive reactor elements.

It is also possible to obtain the same effect as a resistance stabilizer by using a ballast that combines these.

1.9 The present invention is not only effective for straight tube lamps;
It is also effective for devices with non-straight tube lamps, such as lamps bent into a U-shape as shown in FIGS. 8 and 9, and lamps bent into a saddle shape.

Furthermore, it can be applied to other low-pressure mercury vapor discharge lamp devices other than fluorescent lamps.

Table 1 shows the starting voltages of the inventive product and the conventional product.

This shows a comparison of restriking voltage characteristics. Here, one product of the present invention is pulp (the pipe diameter of 111 is 25 (W)).

The length between electrodes (2a) and I (2N+) is 230 (mm), and the starting auxiliary pole (7) is a nickel fine wire with a wire diameter of 0.5 ('T).The tips of the electrodes (2a) and (2b) It was located at the center of the discharge path and at the center of the discharge path. A discharge medium of argon and mercury similar to that in a normal fluorescent lamp is sealed inside the pulp 01), and a phosphor layer nz is formed on the inner surface. In addition, in the lighting circuit shown in Figure 3, the lamps (other than 11) each have a resistance ballast (9) with a resistance value of 105 (Ω).
a), (9), a resistor (8) with a resistance value of 2.0 ± 0.1 (KΩ) was used. Also, the glow starter (4) was F
G-7F was used. On the other hand, the conventional product (A) does not have the starting assist circuit ff71 configured according to the present invention. Furthermore, a different conventional product (as Bl, we used a fluorescent lamp FL-IQ watt ballast with a choke coil ballast (5) as shown in Figure 1, and used a device with a starting auxiliary circuit ff71. In these cases, the power supply voltage is gradually increased at a constant rate, and the voltage when the lamp is fully discharged is taken as the starting voltage.

Further, the restriking voltage is shown as the value after aging lighting for 5 hours at a commercial voltage of A-050Hz 100V (Fig. 2 FiH).

Table-1 As is clear from the results of Table-1, the product with the starting assist circuit C1'rl of the present invention has a balcony f compared to the conventional product (Al).
11's starting voltage is low again. It was confirmed (11) that the restriking voltage of lamp (1) was also low and that it was in a stable discharge state. In addition, compared to the conventional product (Bl), the starting voltage was almost the same, but there was a slight difference in the restriking voltage.However, this difference did not pose any practical problems. .

As explained and clarified in detail above, the present invention is a lamp having a pair of electrodes, in which a series body in which ballasts, which are current limiting elements, are connected on both sides of the lamp is connected in parallel to a power supply, in which the cathodes of the diodes face each other. Between the above electric images, the series body connected by
or connect in parallel between the lamps, or one of the anode sides of each of the diodes to one electrode side of the lamp.

The other one is connected between the electrode of the lamp on the other power supply side and the ballast, and a starting auxiliary pole is provided that protrudes between both cathodes of the diode and into the lamp. Since the configuration includes a starting auxiliary circuit consisting of a resistor connected to limit the normal current flowing, it is possible to replace the conventional choke coil ballast with a resistor ballast L7 to reduce the starting voltage of the lamp, No loss of restrike voltage. Therefore, it is possible to reduce the size and weight (12), and also has the effect of easing restrictions on the tube diameter and discharge length of the lamp.

[Brief explanation of drawings]

Fig. 1 is a schematic diagram of a discharge lamp device using a conventional fluorescent lamp, and Fig. 2 is a fluorescent lamp tube. Fig. 3 is a schematic configuration diagram of a discharge lamp device using a fluorescent lamp showing an embodiment of the present invention, Fig. g4 is a sectional view of the same fluorescent lamp, Fig. 5 and Fig. 6 are The figure is a schematic configuration diagram showing another embodiment of the present invention, FIG. 7 is a cross-sectional view of a fluorescent lamp showing a middle embodiment in which an auxiliary starting pole is also provided on the nutem, and FIGS. 8 and 9 are fluorescent lamps. FIG. 1 is a schematic configuration diagram showing another embodiment in which the shape of the lamp is different. (1) is a fluorescent lamp, (2a), (2b) c electrode, f
61 &! 'i source. (71 is the starting auxiliary pole, (ya) is the tip of the starting auxiliary pole. (8) is the resistor, σ is the starting auxiliary circuit, (9a,)
l (9b) is a resistance stabilizer. Note that the same reference numerals in each figure indicate the same or corresponding parts. Agent Makoto Kuzuno - Cod 1 Figure Moe λ': 1 Roe 1 d Figure 6 Whistle 7 Figure 8 Figure 9

Claims (2)

[Claims] (1) In a low-pressure mercury vapor discharge lamp having a pair of electrodes, a series body with current-limiting elements connected on both sides is connected in parallel to the power supply, and a series body in which the cathodes of diodes are connected opposite each other. Connect in parallel to the above power supply or discharge lamp,
Alternatively, one end is connected to one electrode side and the other end is connected between the discharge lamp and the current limiting element on the other power source side. Equipped with a starting auxiliary pole that protrudes into the discharge lamp between the cathodes of the diodes, and limits the current flowing through the starting auxiliary pole at at least one location on the anode side of each diode and between the cathode of the diode and the starting auxiliary pole. 1. A low-pressure mercury vapor discharge lamp device characterized by being provided with a starting auxiliary circuit connected to a resistor. (2) The low-pressure mercury vapor discharge lamp device according to claim 1, wherein the tip of the starting auxiliary electrode is located at the center of the electrode.