JPS60138841A - Fluorescent lamp - Google Patents

Abstract

PURPOSE:To obtain a fluorescent lamp having compact size, high power, and high emitting efficiency by forming a part of wall which forms an electrode compartment with a good heat conductor which is exposed outside. CONSTITUTION:A radiator 6 comprising chrome steel is installed in a part of wall of an electrode compartment. The heat generated in a discharge space during lighting is mostly radiated on the outer surface of the radiator 6 comprising chrome steel which is a good heat conductor. The discharge space side of the radiator 6 is cooled to the lowest temperature in the discharge space, and mercury sealed inside is condensed on the discharge space side. Mercury vapor pressure in the discharge space is controlled only by the temperature of the discharge space side which is the coolest part. Mercury vapor pressure in the discharge space is not increased even if the diameter of a glass tube 1 is made small and a load of the tube wall is increased. Therefore, light emitting efficiency is not decreased and flickering generated near the electrode does not appear outside.

Description

[Detailed description of the invention] [Technical field of invention] This invention relates to an improved fluorescent rung.

[Prior art]

Generally, a fluorescent rung is made by sealing a glass stem with electrodes implanted on both ends of a glass tube with a phosphor layer formed on its inner surface.
It has a structure in which a small amount of mercury and a rare gas are sealed inside. The mechanism is to convert it into visible light. The radiation intensity of the ultraviolet radiation generated at this time [%] varies depending on the mercury atoms in the discharge space, that is, the mercury vapor pressure, and the mercury vapor pressure
~ γμHg, the radiation intensity of ultraviolet rays is the highest. Therefore, in order to increase the luminous efficiency of the fluorescent light, it is necessary to maintain the mercury vapor pressure in the discharge space between 5 and γμH, which is the optimum value. It is designed so that the tube wall temperature during lighting is approximately 40°C.

The temperature of the tube wall during lighting is generally calculated by dividing the energy consumed by discharge by the surface area of the tube wall, that is, the temperature increases as the load on the tube wall increases. If you increase the lamp output, i.e. the wattage size.

The shape also has to be large.

However, 1, for example, a VJ light source for a copying machine.

There are light sources that are small in size and have a high output, and when trying to apply fluorescent lamps to such fields, the temperature of the tube wall increases during one lighting period due to the small size and high output, which causes discharge. Since the mercury vapor pressure in the space becomes higher than the optimum value, it is inevitably disadvantageous in terms of luminous efficiency. As a countermeasure to this problem, a method has been devised in which the mercury vapor pressure is controlled by placing the mercury sealed in the tube in the form of an amalgam with other metals such as indium. Since the mercury vapor pressure is significantly lower at low temperatures, there is a drawback that the so-called rise time from when the lamp is turned on until the luminescent characteristics stabilize becomes longer.

[Summary of the invention]

In view of the above points, the present invention aims to provide a compact, high-output, hard-light lamp with high light-reflecting efficiency. An electrode chamber made of a base made of an opaque material is arranged at both ends of the tube, an electric wire is arranged in the electrode chamber, and at least a part of the wall surface forming the electrode chamber is made of a good thermal conductor that is exposed to the outside. It is also V-no, characterized by having a structure formed by.

[Embodiments of the invention]

Hereinafter, embodiments of the present invention will be described.

FIG. 1 shows an embodiment of the fluorescent lamp of the present invention, in which 11) - both ends are open, and the inner surface has a 9-layer layer (2;
Glass tube in which is formed, i3H matun 4, mamuro (4)
Of course, the base is made of ceramic. This base (
3 (is an airtight seal between both ends of the glass tube (1+), and a seal 88 at each open end with a glass frit (5) so that the glass tube (1) and the electrode chamber (4) are connected. In addition, a part of the wall of the electrode chamber (4) (in which a chromium heat sink (61) is buried) is placed inside the electrode chamber (4), and a lead wire (8) is an electrode which is exclusively directed to the outside. (9) is an exhaust pipe for making the inside a vacuum and sealing in mercury and cloth gas.

The fluorescent lamp has a stiff structure when it is lit.

Most of the heat generated in the discharge space is released to the outside on the outer surface (61) of the heat sink (61) made of chromium steel, which is a good thermal conductor.
62) has the lowest temperature among the surfaces forming the discharge space, so the mercury sealed inside condenses on the part (62), and the mercury vapor pressure in the discharge space decreases to 1 or the coldest point. It is regulated only by the temperature of the part (62). Therefore, even if the glass tube tl+ is made thinner and the gastric wall load is increased,
Since the mercury vapor pressure within the heat dissipation space does not increase significantly, there is no reduction in one-dimensional light efficiency. or,'? [4@m is disposed within the electrode to (4) surrounded by ceramic, which is an opaque material, so the flicker phenomenon that occurs near the 4k a on the right side of the discharge lamp row is prevented from occurring from the outside. There is also the advantage that it disappears. Furthermore, even if the glass tube (1) is made thinner in the illuminated part, there is still enough space in the skewer/electrode chamber for arranging the electrode (7).

Glass tube (you can freely design the wire regardless of the inner diameter of the tube).

In the embodiment shown in FIG. 1, the heat sink (61) is embedded in the ceramic base (3). )
The same effect can be obtained even if the entire structure is made of a good thermal conductor such as chrome steel. However, in order to facilitate the process of arranging the electrode (7) inside the base +31,
It is preferable that the base body 131 is made up of two members with a groove, and if the method is to place the electric lily pad on one member and then attach them together in one piece, it will be easier to implant 1a at +'. ,
At this time, at least one member may be made of a good thermal conductor.

FIG. 2 shows another embodiment of the invention.

The glass tube (1) is U-shaped.
One thread body with two electrode chambers (4)+a+l
Insert the groove from LC.

A part of the wall surface of one nt electrode chamber 4 of this base body (3) is formed of a hot conductor. A fluorescent rung with such a structure as shown in FIG. 1 has a compact shape around U'J, so it is effective as a light source that has a shape close to a single point light source.

In addition, in the case of the above implementation (chromium steel is used as the material, but the effect is 1), the heat quality from the top is better than that of the glass tube, and it may react with water condensation. 1″+
'%? If the gas released in 2 is small (U), then 1 can be used. Chrome steel is the most suitable because of its resistance to heat during the special manufacturing process, price, etc.

〔Effect of the invention〕

As described above, the fluorescent lamp of the present invention is.

A glass tube with open ends at both ends, a base made of an opaque material that airtightly closes the opening of this glass tube and forms an electrode chamber inside that communicates with the glass tube, and one electrode chamber of this base that is directly installed inside the glass tube. The electrode chamber of the base body has a structure in which at least a part of the wall surface that forms the sound is made of a good thermal conductor that is visible to the outside, so it is small and compact. The one-island output KL-C also has the advantage of not having a one-hole rate.

[Brief explanation of drawings]

Figure 4Mo1 is a partial 1+lr side view showing an example of this back light fluorescent rung, and Figure 2 is a partial cross-sectional view of Kono Tsurayu's 1 (!4). In the figure, (l) is a glass tube, t3)' + base + 14
1 'l'L j4i 41st room. (Shield 61 is a heat radiator, and (7) is an electrode. In each figure, the corresponding part τ is shown once.)

Claims (1)

[Scope of Claims] (1) A glass tube with both ends open, a base made of an opaque material that airtightly closes the opening of the glass tube and has an electrode chamber communicating with the glass tube inside, and a base made of an opaque material. The electrode chamber is provided with an electrode disposed via a lead wire implanted in the base body, and at least a part of the wall surface forming the electrode chamber of the base body is formed of a good thermal conductor that is exposed to the outside. Fluorescent lamp. t2i The fluorescent rung according to claim 1, wherein the base body is formed by integrally forming two members, and at least one of the members is a good thermal conductor. (3) The fluorescent lamp according to claim 1, wherein the opening of the glass tube is closed by a single base. (4) A fluorescent lamp characterized in that it is made of a good thermal conductor (chromic steel).