JPS6261260A - Electric-discharge lamp device - Google Patents

Abstract

PURPOSE:To remarkably simplify the means for applying a voltage by using a near-by conductor to apply a voltage to an exhaust tube the electric potential of which is approximately the middle between the electric potentials of two luminous tubes. CONSTITUTION:A high-frequency power supply 1 is constituted of a transistor inverter where, for example, two transistors 12 are excited and oscillated by the feedback windings 16 of an output transformer 15 which consists of a leakage transformer. The current level of an electric-discharge lamp 3 is controlled by this leakage inductance. When the transistor inverter of the power supply 1 oscillates and a high frequency voltage is applied to the lamp 3, a voltage is applied near an exhaust tube 36 through a near-by conductor 4 and as the result a luminous tube located between the exhaust tube 36 and an electrode 3b either becomes readily discharge or begins to slightly discharge. Therefore, a greater part of the output voltage of the output transformer 15 is applied to the other luminous tube, thereby making the lamp 3 discharge.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention is a device for lowering the starting voltage of a discharge lamp such as a fluorescent lamp having a monocurve-shaped arc tube.

[Conventional technology]

As a means of lowering the starting voltage of the discharge lamp, a nearby conductor may be placed near the tube wall of the discharge lamp.

A device is known that causes a slight discharge between this adjacent conductor and one electrode of a discharge lamp. Unexamined Japanese Patent Publication 1986-65
No. 497 shows this type of conventional device, and in FIG.
1) is a high-frequency power supply that generates a high-frequency voltage, (2) is a ballast l- that sets the current of the discharge lamp (3) to a predetermined value, and (41)
is a nearby conductor, and the current flowing between this and the discharge lamp (3) is limited to a small current by a resistor, etc., and (5) is a switch device that controls blinking of the discharge lamp (3). In the device configured as described above, the proximity conductor (4) is placed in contact with the bent part of the U-shaped discharge lamp (3), and when the switch device (5) is closed, the The crab discharge lamp (3) lights up.

[Problem that the invention seeks to solve]

In this way, a nearby conductor is placed near the tube wall of the discharge lamp.

In addition, in a device for applying a voltage between the electrodes of a discharge lamp, a means for arranging or attaching a nearby conductor as a charging part near the tube wall of the discharge lamp has become indispensable. The present invention aims to provide a device that can simplify this means.

[Means for solving the problem] A leg having a discharge connection part of a discharge lamp in which curved arc tubes (to) and (b) are connected in series via a discharge connection part (to). A proximal conductor 4 is placed close to the exhaust pipe (to) provided on the side, and a high frequency voltage is applied.

[Effect]

A high frequency voltage is applied to two sets of curved arc tubes (c), C341, between the electrodes and the vicinity of the exhaust pipe (g). Thereby, discharge can be started much more easily than when a high frequency voltage is simply applied between both electrodes.

〔Example〕

FIG. 1 shows an embodiment of the device according to the invention.

FIG. 5 shows an example of a main part of a discharge lamp to which the present invention is applicable, and FIG. 6 is a diagram for explaining the present invention in detail.

In Fig. 5, the discharge lamp (3) has nine curved arc tubes (c) and (b), and the leg on the side where the electrodes (sa) and (3b) do not exist is connected to the discharge connection part ( The structure is connected by c). This corresponds to connecting two arc tubes (to) and (b) in series. Here, 43η is an end plate to which the 9 arc tubes are attached, and is provided as necessary, and a ceramic plate or the like is used. (7) is an exhaust pipe for exhausting the two arc tubes, and is formed of a glass tube and is sealed at its tip (A1 part) after completing work such as exhaust.Therefore, There is an airtight space between the end plate Gη and the sealing part A', · and the 0 arc tubes (to) and (b).

FIG. 6 shows a starting device used when lighting fluorescent lamps in two color rows, which is called serial sequential starting. This is between two fluorescent lights Gυ and C33.

By applying a voltage through the starting auxiliary capacitor (6), first the fluorescent lamp 02 is discharged 9 and then the fluorescent lamp C
This is a device that discharges AD. This device can be started with a relatively low applied voltage even though it lights two fluorescent lamps.

Returning to the description of the apparatus shown in FIG. In the figure, αl is a DC power supply, (1) is a high frequency power supply, and (3) is a discharge lamp.

Assume that it is composed of two arc tubes as shown in FIG.

(to) is its exhaust pipe. (4) is a nearby conductor,
A high frequency power source (11 is connected to one end of the output terminal of the output voltage α of It is composed of an inverter, and the output transformer a9 is constructed as a leakage transformer, and the current value of the discharge lamp (3) is controlled by this leakage inductance.

Now, when the transistor inverter of the high frequency power supply (1) oscillates as is well known and applies a high frequency voltage to the discharge lamp (3), a voltage is applied near the exhaust pipe (to) via the adjacent conductor (4). Therefore, the exhaust pipe (to) and electrode (3b)
The arc tube in between is in a state where it is easy to start discharging.

Or start a slight discharge. Therefore, most of the output voltage of the output lamp is applied to the remaining arc tube side, and the discharge lamp (3) can be discharged, using a principle similar to that of the device shown in FIG. In this example, the adjacent conductor (4) applied the voltage directly through the conductor.

The voltage may be applied through some kind of impedance like the starting auxiliary capacitor (6) shown in FIG.

Next, FIGS. 2, 3, and 4 show other embodiments.

In Fig. 2, when pulling out the lead of the electrode (5a) of the discharge lamp (3), one or both of the leads should be in contact with or close to the exhaust pipe (1). It is intended to lower the starting voltage by arranging it so that the starting voltage passes through it.

Figure 3 shows a case where a high-frequency power source (11) is integrated and attached to a discharge lamp (3).This is a case in which, for example, in a compact fluorescent lamp, the discharge lamp part and the ballast part are integrally placed close to each other. Although only the main parts are shown in the figure, the exhaust pipe (7) is connected to a printed circuit board (close to the power source) equipped with the high-frequency power supply (1), and near the exhaust pipe (towards). A high frequency voltage is applied to the motor through a printed circuit board conductor pattern or other means to facilitate starting.

FIG. 4 is similar to the device shown in FIG. 3, but a hole through which the tip (Al) of the exhaust pipe (to) passes is provided in the printed circuit board, and a conductor pattern or the like is provided on the periphery of this through hole.

A high frequency voltage is applied to the exhaust pipe.

Although not mentioned in the above description, a voltage may be applied by providing a printed circuit board (a lug terminal on the blade side or a cylindrical conductor into which an exhaust pipe can be inserted).

It goes without saying that the high frequency power source (1) is not limited to the transistor inverter shown in FIG.

The DC power source α1 may also be configured as appropriate, such as by rectifying a commercial AC power source.

As the discharge lamp (3) to which the present invention is applied, in addition to the one using two approximately U-shaped arc tubes as in the embodiment, the shape of the arc tube may be modified so that the coldest part is provided at the top. It may be a U-shaped arc tube or the like, and in short, it is sufficient if two arc tubes are connected in series via a discharge connecting part and an exhaust pipe is provided on the leg on the side where no electrode is present. Similarly, end plate C37
It is clear that a structure that does not use + can also be applied as long as there is an exhaust pipe in a similar position.

Furthermore, a glass tube is provided as an outer tube on the outside of the two arc tubes,
Moreover, this outer tube was connected to a portion of the arc tube. It can also be applied to so-called vacuum double tube type discharge lamps. The arrangement of the two arc tubes is not particularly limited.

In addition, in the description of the embodiment, only the main parts of the discharge lamp have been shown, but the caps etc. for feeding power to the electrodes (3a) and (sb) may be provided as appropriate, and the discharge lamp (3) Even when the high frequency power source (1) is installed integrally with the high frequency power source (1), the device may be provided with a light bulb base as an external power supply means so that it can be connected to a commercial power source.

Furthermore, the discharge connection section also uses two curved arc tubes.

Any method other than the embodiments may be used as long as it enables discharge in series. A high frequency lighting power source for the discharge lamp (3) is convenient for installing and integrally mounting on a printed circuit board, but a commercial frequency power source may also be used.

〔Effect of the invention〕

As described above, in the device of the present invention, a voltage is applied to the exhaust pipe, which has a potential approximately midway between the two arc tubes, using a nearby conductor, so the advantage is that the means for applying voltage can be greatly simplified. There is.

[Brief explanation of drawings]

Figure 1 is a circuit diagram showing one embodiment of the present invention Figure 2 is a structural diagram showing different embodiments of the present invention Figure 3 is a diagram showing a different embodiment of the present invention Figure 5 is an example of a discharge lamp to which the present invention is applied FIG. 6 is a circuit diagram illustrating the present invention in detail; FIG. 7 is a circuit diagram illustrating a conventional device. In the figure, (1) is a high-frequency power source (3) is a discharge lamp (4)
) is the adjacent conductor (g) is the discharge connection section (to) is the exhaust pipe (sa, 3b) is the electrode The same reference numerals in the drawings indicate the same or equivalent parts.

Claims (5)

[Claims] (1) Two arc tubes each having a curved tube shape at one end form a discharge path in series via a discharge connection near the end on the non-electrode side, and near the leg on the non-electrode side of the arc tube. A discharge lamp device comprising: an exhaust pipe; and a voltage applied between a proximal conductor provided near the exhaust pipe and at least one pole of the electrode to start the arc tube. (2) The discharge lamp device according to claim 1, wherein at least one line of the outlet lead of the electrode is disposed near the exhaust pipe to serve as a proximal conductor. (3) The lighting power for the arc tube is a high-frequency power source, and this high-frequency power source is installed integrally with the arc tube, and is supported by a conductive pattern of a printed circuit board on which the high-frequency power source is arranged, or by this printed circuit board. The discharge lamp device according to claim 1, characterized in that another conductive means is used as a proximate conductor. (4) The discharge lamp device according to claim 1 or 3, wherein the printed circuit board is provided with a hole through which a part of the exhaust pipe passes, and the printed circuit board is used as a proximate conductor. (5) Any one of claims 1 to 4, characterized in that the arc tube is provided with an envelope that communicates a part of the outside and is airtight with the outside. The discharge lamp device described in .