JPH11102789A - Fluorescent lamp lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To economically stably maintain a lighted state while being light- weight without requiring a ballast by providing a glow lighting tube, series- connected to the filament of both electrodes of a fluorescent lamp, and an electronic circuit for applying DC high voltage to the filament of one electrode of the fluorescent lamp. SOLUTION: A fluorescent lamp lighting device is provided with a rectifier DC: 6 connected to an AC 100 V power source 4 so as to convert an alternating current into DC voltage of DC 6 V, for instance, and an electronic circuit r: 7 driven by DC 6 V from the DC: 6, so as to apply a high voltage to one electrode of a fluorescent lamp 1 for generating plasma. In this fluorescent lamp lighting device, when a power switch 5 is closed, high voltage is applied to one electrode of a discharge tube 1 to generate plasma, and when the filament of a fluorescent lamp 1 is heated by the action of a glow discharge tube 2, this plasma reaches the other electrode, and electric discharge is started between both the electrodes. When the length of the fluorescent lamp is long, an electrode of AC 140 V or AC 200 V may be used as the electrode.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a fluorescent lamp lighting device, and more particularly to a fluorescent lamp lighting device which is excellent in economy and stability without using a ballast.

[0002]

2. Description of the Related Art FIG. 2 shows a conventional fluorescent lamp lighting device.
Is a fluorescent lamp, 2 is a glow lighting tube, 3 is a choke as a ballast, 4 is an AC100 power supply, 5 is a power switch,
When the power switch 5 is closed and a power supply of AC 100 V is applied, 100 V is applied to both terminals of the lighting tube 2, and the lighting tube 2 is activated to cause glow discharge. Here, the electrodes of the lighting tube 2 are heated, and a U-shaped bimetal free terminal extends to short-circuit both electrodes. As a result, AC100V is applied to both the filaments of the choke 3 and the fluorescent lamp 1, so that a current almost twice the steady state flows, and the filament is rapidly heated. At the same time, the bimetal cools down, so that after one or two seconds, the two electrodes of the lighting tube 2 are separated again and the circuit is cut off. At the moment when both electrodes of the ignition tube 2 are separated, the choke 3
Then, a high voltage is induced to start a discharge between the two electrodes of the fluorescent lamp 1, after which the filament of the fluorescent lamp 1 is maintained at an appropriate electron emission temperature by the discharge current itself. While the fluorescent lamp 1 is on, the terminal voltage of the fluorescent lamp 1 is applied to the lighting tube 2,
Since this voltage is lower than the discharge starting voltage of the lighting tube 2, the lighting tube maintains the standby posture while being opened.

[0003]

However, the conventional fluorescent lamp lighting device has disadvantages in that the ballast is used, so that it is not economical and heavy, and the discharge stability is poor.

The present invention has been made to eliminate the above disadvantages.

[0005]

According to the present invention, there is provided a fluorescent lamp lighting apparatus comprising: a glow lighting tube connected in series to filaments of both electrodes of a fluorescent lamp; And an electronic circuit for applying the voltage.

[0006]

Embodiments of the present invention will be described below with reference to the drawings.

In the present invention, as shown in FIG. 1, a conventional ballast is not used, and instead, a rectifier 6 connected to a 100 VAC power supply 4 for alternately converting an alternating current to a direct current voltage of 6 VDC, for example, and the rectifier 6 An electronic circuit 7 which is driven by a direct current of 6 V from 6 and applies a high voltage to one electrode of the fluorescent lamp 1 to generate plasma.

As the electronic circuit 7, a conventionally known high voltage generating circuit can be used.

Since the fluorescent lamp lighting device of the present invention is configured as described above, when the power switch 5 is closed, a high voltage is applied to one electrode of the discharge tube 1 to generate plasma,
When the filament of the fluorescent lamp 1 is heated by the action of the glow discharge tube 2, this plasma reaches the other electrode, and discharge starts between the two electrodes.

When the length of the fluorescent lamp is long, etc., the power source 4 may be a power source of AC 140 V or AC 200 V.

[0011]

As described above, according to the fluorescent lamp lighting device of the present invention, there is no need for a conventional ballast, it is economical, it can be reduced in weight, and the lighting state can be maintained stably. There is a benefit.

[Brief description of the drawings]

FIG. 1 is a circuit diagram of a fluorescent lamp lighting device according to the present invention.

FIG. 2 is a circuit diagram of a conventional fluorescent lamp lighting device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fluorescent lamp 2 Lighting tube 3 Choke 4 AC100 power supply 5 Power switch 6 Rectifier 7 Electronic circuit

Claims (1)

[Claims] 1. A glow lighting tube connected in series to filaments of both electrodes of a fluorescent lamp, and an electronic circuit for applying a high DC voltage to a filament of one of the electrodes of the fluorescent lamp. Fluorescent lighting device.