JPS58198850A - Light source body using mesh heater - Google Patents

Abstract

PURPOSE:To keep a fluorescent lamp lighting at a low temperature without fail by providing a mesh-shaped heater around the fluorescent lamp so as to cover the luminous surface of this fluorescent lamp. CONSTITUTION:A cylindrical mesh heater 1 made of an about 40mu thick stainless plate as a raw material, mesh-shaped by etching processing, is arranged around a fluorescent lamp 3 so as to cover the luminous surface of said fluorescent lamp. And, after detecting the outer wall temperature of the lamp 3 by means of a temperature sensor 5, the circumference of the lamp 3 is kept at a proper temperature by a temperature controller 4 for controlling supply power to the mesh heater 1. Accordingly, it is possible to keep the fluorescent lamp 3 lighting without fail even at the temperature less than 0 deg.C without reducing the transmittivity of light, as well as remove discharge noise by the shielding effect of the mesh heater 1.

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, in the past, as shown in Figure 1, the fluorescent lamp 'E1 was wrapped with a transparent heat insulating material A made of silicone rubber, etc., to prevent the tube wall of the lamp from coming into direct contact with cold air and to prevent heat dissipation. I try to do that.

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 in order to eliminate such conventional disadvantages, and the gist thereof 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 μm, 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 mesh size was set to a = 0.065, X, as shown in Figure 3.
If b = c = 1.4\n, the width is set to 45% and the length is 260%, and a voltage of 12V is applied to this, the power consumption is 35W, and the temperature rise when the fluorescent lamp 3 is heated is The rate was 40°C/3 minutes.

In addition, a temperature controller 4 is provided to adjust the heating of the heater, which is equipped with one or more temperature sensors 5 as shown in FIG. Depending on the temperature and outside temperature, mesh heater 1
In other words, it operates in response to input from the temperature sensor 5 to maintain the temperature around the fluorescent lamp at an appropriate temperature. In the figure, 6 is a lighting device for the fluorescent lamp 3, and 7 is a power source for human power.

The light source according to the present invention is constructed as described above, and is heated for 3 minutes when the ambient temperature of the fluorescent lamp is 130°C using a mesh heater having the temperature increase rate described above.
The ambient temperature was 1,000° C., and the luminous efficiency of the fluorescent lamp 0 was sufficiently obtained □, and ideal efficiency was obtained by setting the effective luminous temperature of the fluorescent lamp to +40° C. using the temperature controller. In addition, since the mesh heater is installed so as to surround the fluorescent lamp without any gaps, it can effectively eliminate 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, since the present invention provides a mesh hole around the fluorescent lamp 0, it is possible to reliably keep the fluorescent lamp lit even at low temperatures, and to reduce discharge noise. Since it has a mesh structure, excellent effects such as good light transmittance can be obtained. Furthermore, since the mesh heater is disposed not in close contact with the fluorescent lamp, the fluorescent lamp can be easily replaced, and the fluorescent lamp is protected from external forces.

[Brief explanation of the drawing]

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 a wiring block diagram. 1...Mesh heater, 2...Electrode terminal, 3...Fluorescent lamp, 4...Temperature controller, 5...Temperature sensor, 6... ...Lighting device, 7...Power supply.

Claims (1)

[Claims] A light source using a mesh heater, characterized in that a mesh heater is provided around a fluorescent lamp so as to cover the light emitting surface of the fluorescent lamp.