JPH0364984B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a light source using a mesh heater.

Fluorescent lamps are generally used as light sources for display devices and lighting devices, but fluorescent lamps that utilize mercury discharge have the disadvantage that their luminous efficiency at low temperatures (below 0° C.) is significantly reduced.

For this reason, conventionally, as shown in Fig. 1, a transparent heat insulating material A made of silicone rubber or the like was used to protect the fluorescent lamp B.
The tube wall of the lamp is wrapped to prevent direct contact with cold air and to prevent heat dissipation. However, because the heating method uses the lamp's self-heating, it is difficult to start discharge at extremely low temperatures, resulting in poor starting performance.It also takes a long time for the lamp's luminous flux to stabilize, and sufficient brightness cannot be obtained. If the temperature cannot be adjusted and the temperature becomes too high, there are various disadvantages such as a negative effect on the life of the lamp and poor light transmittance.

The present invention has been made to solve these conventional problems, and the gist of the present invention is to provide a mesh heater around a fluorescent lamp so as to cover the light emitting surface of the fluorescent lamp.

Hereinafter, the present invention will be specifically explained with reference to the illustrated embodiments. Reference numeral 1 denotes a mesh heater, which is formed in a cylindrical shape, and electrode terminals 2 are provided at both end edges of the mesh heater. The mesh heater 1 is made of a thin metal plate (stainless steel, nichrome, etc.) with a thickness of 20 to 100 microns, for example, and is formed into a mesh shape by etching, and is installed around the fluorescent lamp 3 so as to cover the light emitting surface of the lamp. It will be done. Then, using a stainless steel plate with a thickness of 40μ, the dimensions of the mesh were set to a = 0.065m/m and b as shown in Figure 3.
=c=1.4m/m, width 45m/m, length 260m/
m, and when a voltage of 12 V was applied thereto, the power consumption was 35 W, and the rate of temperature increase when the fluorescent lamp 3 was heated was 40° C./3 minutes.

In addition, a temperature controller 4 is used to adjust the heating of the heater.
As shown in FIG. 4, this is equipped with one or more temperature sensors 5, and controls the power supplied to the mesh heater 1 based on the temperature of the outer wall of the fluorescent lamp 3, the temperature of the mesh heater 1, the outside air temperature, etc. It is designed to be controllable, that is, to operate in response to input from the temperature sensor 5, and to maintain the surroundings of the fluorescent lamp at an appropriate temperature. In the figure, 6 is a lighting device for the fluorescent lamp 3, and 7 is an input power source.

The light source according to the present invention is configured as described above,
When the ambient temperature of the fluorescent lamp is -30°C using a mesh heater with the above-mentioned temperature increase rate, the ambient temperature becomes +10°C by heating for 3 minutes, and sufficient luminous efficiency of the fluorescent lamp can be obtained. Ideal efficiency was obtained by setting the effective emission temperature of the fluorescent lamp to +40°C using a temperature controller. In addition, since the mesh heater is installed so as to surround the fluorescent lamp without any gaps, it is effective in eliminating discharge noise, and when the noise was measured with a receiver, the noise was reduced by 50% compared to a device without a mesh heater. I was able to do it.

As explained above, in the present invention, a mesh heater controlled by a temperature controller having a temperature sensor is arranged around a fluorescent lamp, so that the mesh heater is It has an excellent effect of controlling the power supplied to the fluorescent lamp, maintaining the ambient temperature of the fluorescent lamp at an appropriate temperature, and being economical and increasing luminous efficiency in any environment.

In addition, by using a mesh heater, not only can the discharge noise in the fluorescent lamp be significantly reduced, but also the mesh structure has good light transmittance, and it has the advantage of being able to obtain uniform proof. be effective.

Furthermore, since the arranged mesh heater is not in close contact with the fluorescent lamp, the fluorescent lamp can be replaced very easily, and various excellent effects such as protecting the fluorescent lamp from external forces can be achieved.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of a conventional example, Fig. 2 is an external view showing an embodiment of the present invention, Fig. 3 is a partially enlarged view, and Fig. 4 is an explanatory diagram of a conventional example.
The figure is a wiring block diagram. 1...Mesh heater, 2...Electrode terminal, 3...
...Fluorescent lamp, 4...Temperature controller, 5...Temperature sensor, 6...Lighting device, 7...Power source.

Claims (1)

[Claims] 1. A mesh heater characterized in that a mesh heater is arranged around a fluorescent lamp at a predetermined interval so as to cover the light emitting surface of the fluorescent lamp, and the mesh heater is controlled by a temperature controller having a temperature sensor. A light source using