JPH09180683A - Fluorescent lamp fluorescent tube with reflecting film - Google Patents

Abstract

PROBLEM TO BE SOLVED: To radiate the light emitted from a fluorescent tube in the proper direction with no waste, improve radiation efficiency, and prolong the life of the fluorescent tube by forming a specific reflecting film at a part of the outer surface of the glass tube of the fluorescent tube. SOLUTION: A metal, an alloy, an oxide, a carbide, or a nitride having a high reflection factor, e.g. Al, Ni, Au-Cr, Al-Ni, Al2 O3 , TiN, is deposited at a part of the outer surface of the glass tube 1 of a fluorescent tube to form a reflecting film 2. When light is radiated to the reflecting film 2, the light is reflected and goes out from the undeposited portion, the light can be effectively utilized, and lighting efficiency can be improved. The heat of the high- temperature portion of the fluoresent tube is heat-conducted to the other low- temperature portion via the deposited metal having the heat conductivity higher than that of glass, the metal having a high reflection factor of light has a low radiation factor, heat radiation efficiency is improved, and the heat of the fluorescent tube is further radiated. The high-temperature portion of the fluorescent tube is cooled, and the life of the fluorescent tube can be extended.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the structure of a fluorescent tube of a fluorescent lamp, which is widely used for indoor and outdoor purposes such as general households, factories, offices and shops.

[0002]

2. Description of the Related Art The cross section of a conventional fluorescent tube has a structure in which a fluorescent agent 3 is uniformly applied inside a glass tube 1. Therefore, the light is uniformly emitted in the radial direction of the central axis of the glass tube 1.

[0003]

In practice, it is extremely rare that all the light needs to be uniformly emitted in the radial direction of the central axis of the fluorescent tube. Irradiating only one side is usually sufficient. The shade on the opposite side, which supports the fluorescent tubes, is made of white plastic or a clear plastic on a metal plate. In most cases, shades and ceilings do not take light reflection into account. Therefore, even if the ceiling or shade is irradiated with light, the illuminance in the floor direction has little effect.
Therefore, the light emitted toward the ceiling and the shade is wasted, and the lighting efficiency is not good. The present invention was invented in order to effectively utilize the waste of light by improving it.

[0004]

Therefore, a pure metal (for example, silver, gold, aluminum, nickel, chromium, etc.) having a high reflectance, an alloy (for example, Au-Cr,
Al-Ni, Ni-Cr, etc.), oxides (eg Al ₂ O)
₃ , InO, etc.), carbides, nitrides (eg TiN, etc.) are deposited. Alternatively, silver, nickel, chromium, aluminum, or the like is vapor-deposited on a plastic having excellent reflectivity, such as a polyethylene film or a polyester film, which is an alternative to the vapor deposition of the above-mentioned metals, oxides, nitrides, etc., and is attached to the outside of the glass tube 1. This can be dealt with by changing the width θ of the reflective film 2 according to the use, purpose and user's request. In the method of using the pluck as the reflection film 2, the reflection film 2 is attached at low cost. However, it is difficult to extend the life of the fluorescent tube because the effect of heat dissipation decreases. Metals and oxides on glass. Techniques for depositing nitride are well established. There are several ways. For example, metal spraying method, vacuum deposition method (vacuum plating),
Ion beam method (see reference material) is available. The color of reflected light can be changed depending on the substance to be vapor-deposited. For example,
Ag, Al, Ni, Cr, CrN, TiC etc. are silver white, ZrN, Ni-Cu alloy etc. are white gold,
Au, TiN, etc. are gold. When vapor-depositing, attach tape, rubber, paper, paint, etc. to the part that is not vapor-deposited, or
Seal in any other way. The product is obtained by removing the seal after vapor deposition.

[0005]

Next, the operation of the present invention will be described. The light emitted inside the glass tube 1 is reflected as before in the portion without the reflection film 2, the portion with the reflection film 2 is reflected by the reflection film 2, and again the glass is obtained. Returning to the tube 1, light is emitted from the portion without the reflection film 2.
Light emitted from an unnecessary portion or an unnecessary direction until now is emitted only to a necessary portion, so that it becomes brighter than before under the same conditions. The effective use of energy and lighting efficiency can be improved.

[0006]

EXAMPLE Further, by changing the width θ of the reflection film 2,
You can get various lights. When θ is set to be near 360 °, light comes out in a slit shape, and therefore it can be used as a light source such as a document reading unit (scanner) of a fax machine or a copying machine or an optical sensor. In addition, the width θ of the reflective film 2
The amount of reflection can be changed by changing, and the end surface 5 of the reflection film 2 can be formed into various shapes such as a straight line, a waveform, a sin curve, and a saw blade shape, or a part of the reflection film 2 can be a circle, a triangle, A variety of illuminations can be obtained by making holes 4 for polygons, mosaic patterns, cutouts, etc. Further, by covering the entire circumference of the glass tube 1 with a reflection film 2, making holes 4 in places on the reflection film 2, and rotating the fluorescent tube around the central axis of the glass tube 1, it is used in a dance hall or the like. It can also be used as a mirror ball.

[0007]

By attaching the reflection film 2 to a part of the glass tube 1, the light illuminating the reflection film 2 is reflected and emitted in the required direction. Then, the part that needs light, for example, the floor, desk, table, road, etc., becomes bright. The ceiling part reflects the light emitted to the floor, desk, and table,
It is not dark. A conventional 20w fluorescent lamp requires a 10w or 15w fluorescent tube if a tube provided with the reflective film 2 is used. That is, power can be saved.
Further, the amount of reflection can be changed by changing the width θ of the reflection film 2, and the end surface 5 of the reflection film 2 can be changed to a straight line, a waveform, or si.
Various shapes can be obtained by making various shapes such as n-curve and saw blade shape, or by making holes 4 such as circles, triangles, polygons, mosaic patterns, and cutouts in a part of the reflective film 2 to obtain various illuminations. It softens the atmosphere and brightens the mood. When the reflective film 2 is a metal, the heat conductivity of the metal in the high temperature part of the glass is several hundred times higher than that of the glass. There is little difference, the temperature of the high temperature part where the filament on the end surface of the fluorescent tube is located drops,
The rate of deterioration due to the temperature of the tube end face is slowed down, the life of the fluorescent tube can be extended, and resources are reduced. Furthermore, metal, which has high light reflectance, has a lower emissivity (see reference material) than that of glass by about 1/10, so it has a high ability to radiate heat. Can be efficiently radiated, the temperature of the fluorescent tube can be reduced, and the life of the fluorescent tube can be extended. The cost of vapor deposition has little effect because the thickness of the vapor deposited film is several microns. At present, in automobiles, general household appliances, toys, etc., parts made by vapor-depositing metal on plastic, paper, etc. are widely used for cost reduction and weight reduction. In order to protect the metal of the reflection film 2 from oxidation and scratches, a thin plastic film having heat resistance may be attached or adhered to the outside of the reflection film 2 to solve the problem. However, the heat dissipation effect is reduced.

[Brief description of the drawings]

FIG. 1 is a sectional view of a fluorescent tube of the present invention.

FIG. 2 is a front view of the fluorescent tube of the present invention.

[Explanation of symbols]

 1 is a glass tube 2 is a reflective film 3 is a fluorescent agent 4 is a hole 5 is an end face

Claims (5)

[Claims] 1. A metal, alloy, oxide, or carbide having a high reflectance on a part of the outer surface of the glass tube 1 in order to irradiate the light emitted from the fluorescent tube in a necessary direction in an appropriate direction without waste. ， Nitride is vapor-deposited to make the reflection film 2, and when light is irradiated here, the light is reflected and comes out from the part that is not vapor-deposited. Can be effectively used by reflection, improves lighting efficiency, and is a vapor-deposited metal with a higher thermal conductivity than glass,
Metal that conducts heat from the high temperature part of the fluorescent tube to other low temperature parts, and has high light reflectance, has a low emissivity, which improves the efficiency of heat radiation and radiates the heat of the fluorescent tube further. In order to
In addition, it is characterized in that the high temperature part of the fluorescent tube is cooled to extend the life. 2. A glass tube 1 in which silver, nickel, chromium, aluminum or the like is vapor-deposited on a plastic having excellent reflectivity, such as a polyethylene film or a polyester film, which is an alternative to the reflection film 2 formed by vapor deposition of the metal, oxide or nitride. It is characterized in that it is attached to the outside of the to form a reflective film 2 to reflect light. 3. The reflection film 2 attached to the outside of the glass tube 1 is such that the shape of the end surface 5 of the reflection film 2 along the central axis direction of the glass tube 1 is a straight line, a waveform, a sin curve, a sawtooth shape, or the like. It is characterized by giving various shape changes and giving light diversity. 4. The reflection film 2 attached to the outside of the glass tube 1 is a circle, a triangle, a polygon, a mosaic pattern, or a cutout in a part of the reflection film 2 along the central axis direction of the glass tube 1. It is characterized by having holes 4 for pictures and the like, and having a variety of lights. 5. A heat-resistant thin plastic film is attached or applied to the outer side of the reflective film 2 in order to protect the reflective film 2 from metal oxidation and scratches, which is described in claim 1.