JPS60170153A - Compact type fluorescent lamp device - Google Patents

Abstract

PURPOSE:To obtain a light emission tube enclosure which can prevent cataphoresis phenomena and also is lightweight and of low cost by placing a meandering discharge tube at the space between outer enclosure and inner one and by turning on the discharge tube using AC current containing DC component. CONSTITUTION:AC current is converted into DC by rectifying bridge 19 and smoothing capacitor 20, the power transistor 22 turns into operation, by turning on the double throw two-terminal thyrister 21 at the lamp starting and the preheating current is sent to the electrode of a light emission enclosure 1 by the action of a diode 23 and the double throw two-terminal thyristor 24. Just then, the power transistor 22 is cut off by the feed back signal from an electric detection transformer 25, at that time, a compact type fluorescent lamp with the light emission enclosure 1 is turned on by the voltage induced by the series resonance circuit of a choke coil 26 and a capacitor 27. After lighting, repeating the chopper action by using the transistor 22, choke coil 26, capacitor 27 and diode 28, the lamp allows a flow of discharge current of AC containing DC component.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to compact fluorescent lamp devices.

Conventional Structures and Problems Recently, various compact fluorescent lamp devices have been proposed as energy-saving light sources to replace incandescent light bulbs. FIGS. 1a and 1b show an example already proposed by the applicant. Inside the container outer body 2 made of a translucent glass material and having a spherical outer shape or a cylindrical curved surface, there is a container inner body 3.
A light emitting envelope 1 is formed by inserting and overlapping each other. A metal lid 6 is hermetically sealed to the opening 4 of the container outer body 2 with a glass frit 6 or the like.

There are still grooves 7 in the container inner body 3 that form the discharge path.
are provided in a meandering manner to form one continuous discharge path, and electrodes 8°9 are connected to internal lead wires 1 at both ends.
0.11, and the inner leads 10.11 are connected to the outer conductors 12.13, respectively. In this case, the outer conductors 12 and 13 are simultaneously hermetically sealed by the glass frit 6 in the opening 4 of the enclosure outer body 2. A part or all of the inner surface of the container outer body 2 and the outer surface of the container inner body 3 are coated with a phosphor 14 . Further, an exhaust pipe 16 is sealed to the metal lid 6 with the same glass frit (not shown). The inside of the luminescent envelope 1 is evacuated to a vacuum via an exhaust pipe 15, and excess mercury and rare gas are sealed therein.

As a lamp device, as shown in FIG. 2, a case 16 and a base 17 are attached to a loose light emitting envelope 1, and a lighting ballast 18 is installed inside the case 16. In this case, a choke coil is usually used as the ballast 18.

-1- The compact fluorescent lamp device described above has a high overall efficiency of approximately 401 m/W, which is less than three times that of a light bulb, and the single lamp is easy to use as it can be plugged into a light bulb socket and turned on. ing. However, one of the problems in use is that it is significantly heavier, weighing 400 to 500 mm compared to a light bulb. This is because the choke coil of the ballast 18 has a large weight of about 250=300f.

As described above, the large weight of the device will be one of the obstacles to the future commercialization of such devices and their widespread use in household lighting.

- In order to solve the problem in item h, it is possible to incorporate a lightweight electronic ballast as the ballast 18 in place of the conventional choke coil. This reduces the weight of the entire device to about 3A compared to the conventional one. However, another problem arises in that the cost of the entire device increases.

OBJECTS OF THE INVENTION The present invention provides a compact fluorescent lamp device that is lightweight and relatively low cost.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The inventor has conducted various studies regarding a compact fluorescent lamp device that satisfies the above objects. As a result, a circuit that is lit with an asymmetrical alternating current with a so-called direct current component, rather than a circuit that is lit with an alternating current with no direct current component, where the current per half cycle is symmetrical, as is the case with conventional compact fluorescent lamps. We arrived at the basic idea that it is possible to reduce costs.

By the way, in order to embody the above basic idea, a compact fluorescent lamp that can be lit with alternating current that has a direct current component is required.

By the way, when a fluorescent lamp made of a normal thin tube is lit with an alternating current that has a direct current component, the mercury is biased from the direct current component side toward one electrode that acts as a cathode due to the so-called cataphoresis phenomenon, Only the positive column region near the electrode emits bright light, and the light emission in the positive column region on the other electrode side becomes dark. Therefore, the above basic idea cannot be realized with a key using an ordinary fluorescent lamp.

As a next step, the inventor searched for a fluorescent lamp that could be lit even with alternating current that had a direct current component. As a result, a new phenomenon has been discovered in which the lamp shown in FIG. 1 has almost no cataphoresin phenomenon. Based on this new knowledge, it is possible to realize a compact fluorescent lamp device that satisfies the above objectives of being lightweight and relatively low cost by lighting the compact fluorescent lamp with an alternating current discharge current that has a direct current component. did it.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

The compact fluorescent lamp shown in FIG. 1 was lit using alternating current with a direct current component using a chopper-type high-frequency lighting circuit shown in FIG. FIG. 4 shows the asymmetrical waveform of the discharge current at this time with respect to the time axis.

Next, the operation of the lighting circuit shown in FIG. 3 will be explained. AC is converted into DC by the rectifier bridge 19 and the smoothing capacitor 2o. When starting the lamp, the bidirectional 2-terminal thyristor (DIAC) 21 is turned on, the power transistor 22 is turned on, and the light-emitting envelope 1 is turned on by the operation of the diode 23 and the bidirectional 2-terminal thyristor (SSS) 24.
A preheating current flows through the electrode 9.8. Then, the power transistor 22 is cut off by the feedback signal from the current detection transformer 726, and the voltage induced by the series resonant circuit of the choke coil 26 and the capacitor 27 causes The lamp is turned on.

After lighting u power transistor 22, choke coil /l/
26, capacitor 27, and diode 28, a so-called chopper operation is repeated, and an alternating current discharge current having a direct current component as shown in FIG. 4 flows through the compact fluorescent lamp. This discharge current waveform is indicated by number 29.

It was confirmed that cataphoresis does not occur even in a low temperature range when the compact fluorescent lamp shown in FIG. 1 is lit using the lighting circuit shown in FIG. 3.

By the way, when the double U-shaped fluorescent lamp 30 shown in Fig. 6, which is used in a conventional compact fluorescent lamp device, was lit using the lighting circuit shown in Fig. 3, a cataphoresis phenomenon occurred and the ambient temperature increased. This became more noticeable as the temperature decreased.

The reason why the cataphoresis phenomenon tends to occur in the compact fluorescent lamp shown in FIG. 1 is due to the unique structure of such a lamp, in which both electrodes are in communication with each other even though they are closely spaced from each other.

That is, it is considered that even if mercury is biased towards one electrode due to the cataphoresis phenomenon, it moves to the other electrode area due to diffusion. It can be said that the origin of the present invention lies in the discovery of such a new phenomenon.

The compact fluorescent lamp shown in Fig. 1 is used, and this is combined with the chopper circuit shown in Fig. 3. is reduced by about 3A, and the overall efficiency is further improved to a level of about 60βm/W. Also,
The chopper circuit shown in FIG. 3 does not require an output transformer 31, and has a single power transinutor, compared to, for example, the push-pull circuit (FIG. 6) commonly used for high-frequency lighting of fluorescent lamps. The circuit configuration is extremely simple, and costs are reduced accordingly.

However, if AC lighting with a DC component is acceptable, a lighting circuit other than a chopper circuit can be used.

It should be noted that the compact 1-type fluorescent lamp device according to the present invention does not necessarily have to integrate the light emitting section and the lamp circuit section, and may be a device in which the two are separated and held, for example, on a lighting fixture table. A light and relatively low cost product is realized.

Furthermore, the structure of the luminous envelope may be one in which the metal lid 5 in FIG. good.

As described in detail, the present invention provides a method for lighting a light-emitting container in which an outer container body and an inner container body are overlapped and a meandering discharge path is provided between them using alternating current that has a direct current component. This makes it possible to prevent the cataphoresis phenomenon and to provide a compact fluorescent lamp device that is lightweight and relatively low cost.

[Brief explanation of drawings]

Figures 1 (&) and (b) are a partially cutaway front view and a sectional view taken along the line X-X of a compact fluorescent lamp, Figure 2 is a front view of the lamp device, and Figure 3 is a diagram showing one example of the present invention. A circuit diagram of a compact fluorescent lamp device as an example, FIG. 4 is a discharge current waveform diagram at that time, and FIG. 5 is a perspective view of a double D-shaped light tube employed in a conventional compact fluorescent lamp device. 6 are high frequency lighting circuit diagrams of a conventional fluorescent lamp. 1... Luminous enclosure, 2... Outer body of the enclosure,
3... Container inner body, 7... Groove, 8, 9...
... Electrode, 14 ... Fluorescent material, 16 ...
cake, 17... base, 18... stabilizer, 19... rectifier bridge, 2o... smoothing capacitor, 21... bidirectional 2-terminal thyristor, 22...Power transistor, 23...
...Diode, 24...Bidirectional 2-terminal thyristor, 26...Current detection transformer, 26...
Choke coil, 27... Capacitor, 28...
···diode. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure (0-) Figure 2 Figure 3 Back A Figure? 9 Figure 5 Figure 6

Claims (1)

[Claims] A container outer body having a curved surface shape and a container inner body are overlapped, a meandering groove for forming a discharge path is provided at least in the container inner body, and electrodes are provided at both ends of the groove. , further comprising a compact fluorescent lamp in which a fluorescent substance is coated on at least a portion of the inner surface of the outer container body and the outer surface of the inner container body, and mercury and rare gas are sealed in the groove. A compact fluorescent lamp device characterized by lighting with an alternating current discharge current having a direct current component.