JPS62188159A - Fluorescent lamp - Google Patents

Abstract

PURPOSE:To obtain easy manufacturing and high brightness, by arranging electrodes on one end of discharge path bottom parts coated with phosphors in a light-source tube member and discharge holes at the other end. CONSTITUTION:Single common electrode 8 installed on a glass stem 7 is arranged on an inner bottom part of the electrode chamber 9 inside the electrode chamber unit 12 attached on the outer bottom part of a light source tube member 1. Discharge paths 2R, 2G, and 2B are formed by the partitioning walls 1' inside the light source tube member 1. The whole inner planes of respective discharge paths are coated with phosphors 3R, 3G, and 3B, and positive electrodes 4R, 4G, and 4B are independently arranged at one end, and the discharge holes 5R, 5G, and 5B communicating to the electrode chamber 9 are arranged at the other end. An air-tight space restricted by a glass plate 6, which is attached to an opening plane of the light source tube member 1, the light source tube member 1, and the electrode chamber 9, is filled with discharging gas. Luminous color is freely obtained by exchanging a switch SW at a high speed and continuously changing luminous ratios of the respective discharge paths 2R, 2G, and 2B.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a fluorescent lamp used as a display element in a large color display device or the like.

[Background Art] A fluorescent lamp with an integrated discharge space and a structure as shown in FIG. 7 has been proposed as a light source for color displays. This fluorescent lamp has an L-shaped light source tube 2 made of glass.
A plurality of discharge paths 22R, 22G, 22B are formed by a partition plate 21 in the discharge space inside the 0, and discharge is performed by sequentially switching between the common cathode 23 and each anode electrode 24R, 24G, 24B. Discharge v122 R, 22G, 2
2 Phosphor coated on the inner wall of B 25 R, 25G, 25
B provides variable color light emission.

Although this lamp is small, has high brightness, and has excellent performance as a display element, it has the following problems in manufacturing.

In other words, when manufacturing a lamp container by assembling a large number of glass plates by lath 7-lit sealing, poor sealing is likely to occur due to variations in the dimensions of the raw glass, variations in the amount of glass 7-lit coating, etc. Because the firing temperature of the glass is higher than the sealing temperature of glass 7 liters, it is necessary to apply the phosphor to the glass plate in advance and complete the firing, which results in very poor workability and damages the phosphor, which has a weak coating. The problem was that it was easy to receive.

[Objective of the Invention 1 The present invention has been made in view of the above-mentioned problems, and its object is to provide a fluorescent lamp for a display element that is easy to manufacture and can obtain high luminance. be.

[Disclosure of the Invention] According to the present invention, one side is open, and a plurality of discharge paths are formed inside by partition walls, and the inner surface of each discharge path is coated with a phosphor of a different luminescent color for each discharge path. A phototube in which independent electrodes are arranged at one end of the bottom, independent discharge holes are formed in the other end, and the partition wall is integrally molded, and a glass plate sealed to the open surface of the phototube. and an electrode chamber main body, the electrode chamber body having at least a common electrode provided in the internal electrode chamber, and an open surface side sealed to the outer surface of the light source tube body so that the discharge hole and the electrode chamber communicate with each other, The device is characterized in that a discharge gas is sealed in an airtight space formed by the plate, the light source tube, and the electrode chamber. The present invention will be explained below with reference to Examples.

Inu 1 Tsukeguchi = Figure 1 shows a perspective view of this embodiment, and the light source tube 1 is made of a non-luminescent material with high visible light reflectance, such as ceramic, and is formed into a flat rectangular parallelepiped shape. One side is open, and the inside forms, for example, three parallel discharge paths 2R, 2G, and 2B by integrally molded partition walls 1°. Each discharge path 2
R, 2G, 2B are phosphors with different luminescent colors on the entire inner surface, that is, both side surfaces, both end surfaces, and the bottom surface.R, 3
For example, the discharge path 2R is coated with a red phosphor 3R (Y2O,;Ell), the discharge path 2G is coated with a green phosphor 3a (ceMgAlzo+s:Tb), and the discharge path 2B is coated with a blue phosphor. Phosphor 3B (BaMg2A1..02
．． :Eu) is coated.

Each independent anode electrode 4R, 4G, 4B is disposed at one end of each discharge path 2R, 2G, 2B, and at the other end is a discharge hole 5R, 5G, 5B communicating with an electrode chamber 9, which will be described later. is provided.

A translucent glass plate 6 is sealed to the open surface of the light source tube 1 before display. A rectangular parallelepiped electrode chamber body 12 is sealed to the outer bottom surface of the light source tube 1. The electrode chamber body 12 has an electrode chamber 9 formed therein.
A single common cathode 7 attached to the last stem 7 is disposed at the inner bottom of the cathode. The common shade ff8 is connected to the discharge holes S R, 5G, and 5B through the open ceiling surface of the electrode chamber 9.
The electrode chamber main body 12 is sealed to the outer bottom surface of the light source tube body 1 in a manner corresponding to the above. 10 is an exhaust pipe.

The glass plate 6, the light source tube 1 and the first electrode chamber 9
A discharge gas consisting of an inert gas such as argon and mercury is sealed in the airtight space defined by the . The above-mentioned parts are hermetically sealed using seven glass holes.

Here, the dimensions of the fluorescent lamp of this embodiment are such that the diameter of the circle inscribed in the discharge path 1 is d, and the anode electrodes 4R, 4G, 4
It is designed to satisfy 2d≦α≦4d, where α is the distance between B and the common cathode 8, that is, the distance between the electrodes.

FIG. 3 shows an example of a circuit for lighting the fluorescent lamp of this embodiment. Each of the anode electrodes 4R, 4G, and 4B is connected to a selection changeover switch SW (specifically, a transistor switch that varies the duty) from each DC power source DC via a resistor R as a current limiting element. ST is a starter for starting.

By increasing the speed and arbitrarily changing each duty ratio, the emission ratio of each discharge path 2R, 2G, 2B changes continuously, and a flexible emission color can be obtained.

The fluorescent lamps of this embodiment thus configured can be arranged as one pixel in a constant array as shown in FIG. 4 to form a medium to large sized color display device. In this case, the minimum size of the fluorescent lamp in the example is 2On+
Since it can be made in any size from m square to a maximum of 500 mm, it can be widely used as a display element for display devices of various sizes and uses. In addition, since the light source tube 1 and the partition wall 1 of each fluorescent lamp are made of a non-transparent material with high visible light reflectance, there is no need for a special reflective film to obtain brightness, and the display surface The device uses a translucent glass plate 6 to realize a so-called aperture configuration, so it can obtain three times the brightness of conventional devices with the same power consumption, making it ideal for large color display devices. .

In this embodiment, the outer shape of the electrode chamber body 12 constituting the light source tube 1 and the electrode chamber 9 is cylindrical, as shown in fJSs diagrams (a) and (b). This facilitates molding of the ceramic material of the electrode chamber body 12 that constitutes the light source tube 1 and the electrode chamber 9.

The other configurations are the same as those in the first embodiment, and the same reference numerals as those in the first embodiment are the same, and the explanation thereof will be omitted. Note that the discharge paths 2 R, 2G, 2 of the light source tube 1
B is formed by a fan-shaped space separated by partition walls 1'' formed radially from the center, and discharge holes S R, 5G,
5B is perforated at the exact position corresponding to the important part.

In the above embodiments 1 and 2, the number of discharge paths is 2R, 2G, and 2B.
Although two cases are shown, the number of discharge paths can be arbitrarily selected to 2 or 4 or more depending on the display specifications of the display device to be formed.

1. As shown in FIG. 6, in this embodiment, a plurality of light source tubes 1 having the shape of Embodiment 1 and a plurality of electrode chamber bodies 12 constituting the electrode chamber 9 are each molded from ceramic, and are used as lamps. We are trying to reduce costs. Further, an exhaust hole 11 is bored in the partition wall at the boundary of the electrode chamber 9 to uniformly exhaust the exhaust from each fluorescent lamp section, so that one exhaust pipe 10 can be used in common.

The illustrated example is one in which two fluorescent lamp parts are integrated, but it goes without saying that it is possible to manufacture a larger number than the example, and the cost reduction rate increases as the number of integrated units increases. Become.

[Effects of the Invention] As described above, the present invention has one side open, - a plurality of discharge paths are formed inside by partition walls, and the inner surface of each discharge path is coated with a phosphor of a different luminescent color for each discharge path. and a phototube body in which each independent electrode is arranged at one end of the bottom of the discharge path, each independent discharge hole is bored at the other end, and the partition wall is integrally molded; an electrode chamber main body, which includes a glass plate that has been attached, and at least a common electrode provided in the internal IM chamber, and the rm-released surface side sealed to the outer surface of the light source tube so that the discharge hole and the electrode chamber communicate with each other; Since the discharge chamber is sealed in the airtight space formed by the positive plate, the light source tube body, and the electrode chamber, the light source tube body including the partition wall and the electrode chamber body constituting the electrode chamber can be molded. As a result, the number of parts can be minimized, and as a result, there are far fewer dark areas for sealing compared to conventional methods, and the number of sealing defects can be greatly reduced. In addition, since the light source tube and the partition wall are integrally molded in advance, it is extremely easy to apply the phosphor.
Further, since the common electrode is provided in the electrode chamber, there is no influence of reduction in brightness of the light emitting surface due to scattering of electrode material, and there is an effect that high brightness light emission can be maintained.

[Brief explanation of drawings]

FIG. 1 is a perspective view of Embodiment 1 of the present invention, FIG. 2(a) is a front view of the same as above, FIG. 2(b) is a sectional view taken along line A-A in FIG. A circuit diagram of the lighting circuit of Example 1, FIG. 4 is a front view of a display device using Example 1, and FIG. 5(a)
5(b) is a front view of the second embodiment of the present invention, and FIG.
), Figure 6 is a cross-sectional view of Example 3, and Figure 7 is a cross-sectional view of Example 3.
The figure is a perspective view of a conventional example. 1 is a light source tube, 1 is a partition wall, 2 R, 2G, 2 B is a discharge path, 3 R, 3G, 3 B is a phosphor, 4R, 4G, 4
B is an anode, 5 R=5 G, 5 B is a discharge hole, 6 is a glass plate, 8 is a common cathode, 9 is an electrode chamber, and 12 is an electrode chamber body. Agent Patent Attorney Ishi 1) Chief 7 Figure 1 Figure 5 (b) Figure 6 Procedural Amendment (Voluntary) May 2, 1986

Claims (2)

[Claims] (1) One side is open, and a plurality of discharge paths are formed inside using partition walls.The inner surface of each discharge path is coated with a phosphor of a different luminescent color for each discharge path, and one end of the bottom of the discharge path is coated with a phosphor of a different color. A phototube body in which independent electrodes are arranged, each independent discharge hole is bored at the other end, and the partition wall is integrally molded, a glass plate sealed to the open surface of the phototube body, and an internal electrode. The chamber is provided with at least a common electrode, and the electrode chamber main body has an open surface side sealed to the outer surface of the light source tube so that the discharge hole and the electrode chamber communicate with each other, and the glass plate and the light source tube and a fluorescent lamp characterized in that a discharge gas is sealed in an airtight space formed by an electrode chamber. (2) A patent claim characterized in that the light source tube, the partition wall of the light source tube, and the electrode chamber body and the partition wall of the electrode chamber body are integrally molded from a non-transparent material with high visible light reflectance, such as ceramic. A fluorescent lamp according to item 1 in the range 1.