JP3016846U - Fluorescent lamp brightness reduction prevention device - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention relates to prevention of brightness reduction of a fluorescent lamp in which mercury is sealed. [Structure] A fluorescent lamp tube (1), an inverter (2) for lighting the fluorescent lamp tube (1), and a heater (3) for heating the fluorescent lamp tube (1) are provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to prevention of a decrease in brightness of a fluorescent lamp containing mercury.

[0002]

[Prior art]

 Conventionally, when the temperature of a fluorescent lamp tube in which mercury is sealed becomes low, the mercury vapor pressure in the tube becomes low, and the brightness becomes low. In particular, the fluorescent lamp tube in the early stage of lighting has a disadvantage that the brightness is remarkably lowered due to the low temperature.

[0003]

[Problems to be solved by the device]

 The idea is to keep the temperature of the fluorescent lamp tube within a certain temperature range regardless of whether the fluorescent lamp is turned on or off and to keep the mercury vapor pressure in the fluorescent lamp tube below a certain level. The aim is to develop a device that prevents the decrease in brightness at the initial stage of lighting, which was a drawback. Further, it is possible to lower the discharge starting voltage to facilitate the lighting of the fluorescent lamp tube.

[0004]

[Means for Solving the Problems]

 To explain the solving means for achieving the above object, a heater is arranged in the vicinity of the fluorescent lamp tube and the heater is energized to heat the fluorescent lamp tube to maintain a specified temperature range.

It is effective that the heater is adhered to the fluorescent lamp tube with an adhesive or brought into contact with the attached fluorescent lamp tube through a band or a fitting. In addition, a blower structure may be attached to the heater to blow hot air heated by the heater on the fluorescent lamp tube.

In order to keep the emission brightness range of the fluorescent lamp tube accurately, a bimetal is installed in contact with or in the vicinity of the heater or the fluorescent lamp tube, and when the temperature of the bimetal rises above a set temperature, the heater is energized. Turn off the switch, detect that the temperature has dropped below the set temperature, turn on the heater energizing switch, and repeat the energizing and shutting off of the heater to control. In addition, the heater circuit may be energized and controlled by detecting the temperature with a resistor, a thermocouple, an infrared ray, or a semiconductor sensor instead of the bimetal.

[0007]

[Action]

 Since the present invention is a device configured as described above, by keeping the fluorescent lamp tube or its surrounding temperature within a certain temperature range and keeping the mercury vapor pressure in the fluorescent lamp tube at a certain level, it is possible to obtain an extreme temperature from the initial lighting. It is possible to prevent a decrease in brightness.

[0008]

【Example】

An embodiment will be described with reference to the drawings. In FIG. 1, an inverter (2), an inverter (2), and an inverter (2) in which a heater (3) is placed in the vicinity of the fluorescent lamp tube (1) to light the fluorescent lamp tube (1). The power required for the heater (3) is supplied through the power connector (4), and the open / close switch (5) opens / closes the power supply to the inverter (2) to turn on or off the fluorescent lamp tube (1). Let According to this example, when the fluorescent lamp tube (1) was turned on with the heater (3) not energized, the results shown in Table 1 were obtained. Next, when the heater (3) was energized to set the ambient temperature of the fluorescent lamp tube (1) to 40.3 ° C. and the fluorescent lamp tube (1) was turned on, the results in Table 2 were obtained. However, with the heater (3) not energized, the ambient temperature of the fluorescent lamp tube (1) installed was 22.6 ° C, and the relative brightness was 5 minutes after the fluorescent lamp tube (1) was turned on. The brightness is a percentage based on 100%, and the temperature is the temperature (° C.) at the center of the fluorescent lamp tube (1).

In order to effectively transfer heat from the heater (3) to the fluorescent lamp tube (1), the fluorescent lamp tube (1) and the heater (3) are fixed to each other with an adhesive, a mounting bracket, or a band. deep. In the embodiment shown in FIG. 3, the heater (3) is fixed to the fluorescent lamp tube (1) with the band (6). In the embodiment shown in FIG. 4, the fan (7) is attached to the spiral heater (3) to blow air to the fluorescent lamp tube (1). In the embodiment shown in FIG. 5, a bimetal (8) is installed in the vicinity of the fluorescent lamp tube (1) or the heater (3) to control the ambient temperature of the fluorescent lamp tube (1) to a set temperature. . Further, it is possible to accurately control the energization of the heater by detecting the temperature with a resistor, a thermocouple, an infrared ray, or a semiconductor sensor instead of the bimetal.

[0010]

[Effect of device]

 As in this example, with the heater not energized, the brightness 5 seconds after lighting was less than half the brightness measured 5 minutes after lighting, but the heater was energized to determine the ambient temperature of the fluorescent lamp tube. If the temperature is raised to 40.3 ° C and it is turned on in the same way, the temperature rises to 84.3%. In this way, the device can increase the relative brightness in a short time. Also, when the ambient temperature becomes low, the discharge start voltage increases and it becomes difficult to light the fluorescent lamp tube. Therefore, the device can be easily turned on by energizing the heater and raising the temperature of the fluorescent lamp tube to lower the discharge start voltage.

[Brief description of drawings]

FIG. 1 is a block diagram of the present invention.

FIG. 2 is a block diagram of the present invention showing a fluorescent lamp tube and a heater in contact with each other.

FIG. 3 is a block diagram of the present invention with a blower mechanism attached to the heater.

FIG. 4 is a block diagram of the present invention using bimetal.

[Explanation of symbols]

 1 ... Fluorescent lamp tube 2 ... Inverter 3 ... Heater 4 ... Power connector 5 ... Opening / closing switch 6 ... Band 7 ... Blower mechanism 8 ... Bimetal

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[Procedure amendment]

[Submission date] April 5, 1995

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Scope of utility model registration request

[Correction method] Change

[Correction content]

[Scope of utility model registration request]

Claims (1)

[Scope of utility model registration request] 1. A fluorescent lamp brightness reduction prevention device comprising a fluorescent lamp tube (1) in which mercury is sealed, a heater (3) for heating the fluorescent lamp tube (1), and an inverter (2) for lighting the fluorescent lamp tube. As a method of heating the fluorescent lamp tube (1), there is also a method of attaching a blowing mechanism to the heater (3) and blowing hot air to the fluorescent lamp tube (1).