JP3038824B2 - Fluorescent lamp - Google Patents

Description

Description: Object of the Invention (Industrial application field) The present invention relates to a fluorescent lamp emitting a plurality of colors in a single tube suitable for a color light-emitting display element of a large-sized color light-emitting display device. The present invention relates to a fluorescent lamp having an improved method for drawing out lead wires of a plurality of electrodes.

(Prior Art) Conventionally, as this type of display fluorescent lamp, there is a fluorescent lamp 1 configured as shown in FIG.

This fluorescent lamp 1 is referred to as a single tube single color or single tube multicolor fluorescent lamp. As shown in FIG. The upper step 2a has a planar shape of, for example, a quadrangle.

On the inner bottom surface of the envelope 2, a cathode 4 which is a common electrode implanted on the button stem 3 is erected, and a tapered cylinder 5 having a tapered cylindrical shape is fitted and fixed in the upper step portion 2a. ing.

As shown in FIG. 5, a grid-like partition plate 6 is coaxially fitted into the tapered cylinder 5 and, for example, 16 light-emitting chambers 7a to 4 rows and 4 columns are provided.
7p is classified.

Each of the light emitting chambers 7a to 7p is provided on the inner surface of the tapered cylinder 5 and the partition plate 6.
Each time a fluorescent film is applied.

In each of the light emitting chambers 7a to 7p, anodes 8a to 8p, which are a plurality of electrodes, are arranged at respective corners, and discharge holes (not shown) are arranged at respective inner corners.
And the anodes 8a to 8p are selectively energized to generate a discharge between the cathode 4 and the anodes 8a to 8p. And the emitted light is radiated from the translucent plate 9 to the outside.

(Problems to be Solved by the Invention) However, in such a conventional fluorescent lamp 1, since the number of anodes 8a to 8p is relatively large,
Many lead wires 10 electrically connected to 8a to 8p respectively
In the vicinity of each of the anodes 8a to 8p, a to 10p hang down from the envelope 2 and are drawn out randomly.

For this reason, since many lead wires 10a to 10p are entangled with each other around the envelope 2 and the handling is not easy, the electrical insulation treatment of these lead wires 10a to 10p is complicated, and each lead wire 10a It is not easy to confirm the correspondence between the lead wires 10a to 10p and the anodes 8a to 8p, and an error may occur in the connection between the lead wires 10a to 10p and the lighting circuit (not shown).

Therefore, the present invention has been made in view of the above circumstances,
Its purpose is to ensure electrical insulation of the lead wires of multiple electrodes,
It is another object of the present invention to provide a fluorescent lamp which can be manufactured easily and can improve the workability of manufacturing.

[Configuration of the invention]

(Means for Solving the Problems) The present invention is configured as follows to solve the above problems.

That is, the present invention provides a light-transmitting plate, a fluorescent film-coated body that is expanded toward the light-transmitting plate and has a fluorescent film adhered to the inner surface, A partition member for dividing a light-emitting chamber formed by the film-coated body into a plurality of light-emitting chambers, a plurality of electrodes provided respectively corresponding to these light-emitting chambers, and a pair of these electrodes; A fluorescent lamp having an envelope in which a common electrode facing in the vertical direction is built and an electrical insulating film is applied to an inner peripheral surface of the fluorescent lamp. A coating is applied, and at least a part of the lead wire electrically connected to the plurality of electrodes is buried by at least a part of the electric insulating coating, and the lead wire is configured to be drawn out of the envelope. Features.

(Operation) At least a part of the lead wires of the plurality of electrodes is buried in the electrical insulating coating of at least one of the envelope and the partition member, and is drawn out of the envelope.

Therefore, the electrical insulation of the lead wires is ensured, and since each lead wire is fixed around the envelope, handling thereof is facilitated, and workability in these subsequent manufacturing steps can be improved.

Embodiment An embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 is a longitudinal sectional view of FIG. 2, and FIG. 2 is an external perspective view of an embodiment of the present invention. In these figures, the fluorescent lamp includes an envelope 20 formed of a thin metal plate such as stainless steel or iron. , And has one end in the axial direction (the upper end in FIGS. 1 and 2) opened.

The upper portion of the opening is widened into a rectangular tube shape, thereby forming upper step portions 20a each having a planar shape of, for example, a square.

As shown in FIG. 3, inner and outer glass coatings 20b and 20c are coated on the entire inner peripheral surface from the upper end of the upper step portion 20a to the lower bottom of the envelope 20 and the entire outer peripheral surface of the envelope 20. And
When a discharge occurs in the envelope 20, the metal envelope 20
The internal glass coating 20b prevents the internal gas from being released from the internal gas, and increases the strength against external pressure.

A center hole 20d is formed in the bottom of the envelope 20, and a cathode 22 of a common electrode implanted on the button stem 21 is erected on the inner bottom thereof. The tip ends of a pair of lead wires 22a and 22b supporting both ends of the button stem penetrate in the thickness direction of the button stem 21, and are electrically connected to a lighting circuit (not shown).

An exhaust pipe 23 made of glass is integrally provided at the periphery of the lower surface opening of the center hole of the button stem 21 so as to extend outside from the bottom center hole 20c of the envelope 20.

The envelope 20 has a tapered tube 24, which is a fluorescent film-coated body, inserted and fixed inside the upper step portion 20a, and a square lattice-shaped partition plate 25 is coaxially fitted into the tapered tube 24. As shown in FIG. 2, the inside of the tapered cylinder 24 is partitioned into, for example, 16 planar quadrangular light emitting chambers 26a to 26p in 4 rows and 4 columns.

The tapered cylinder 24 is formed by arranging four electric insulators in the shape of a truncated pyramid with a bottom that expands upward in the figure in a square lattice and joining them together integrally. Rooms 26a-26p
Drilled every time.

Each inner surface of the tapered tube 24 facing the light emitting chambers 26a to 26p and the partition plate 25
Are, for example, green (G), blue (B), red (R)
Are respectively coated with fluorescent films that emit light.

In each of the light-emitting chambers 26a to 26p, for example, 16 anodes 28a to 28p each having a small-diameter cylindrical shape are arranged.

The lower ends of the respective anodes 28a to 28d are electrically connected to the respective lead wires 30.

Of these lead wires 30, with regard to the lead wire 30 such as an anode, for example, 28h (see FIG. 1) disposed on the outer peripheral portion of the tapered cylinder 24, the tip of the pin-shaped portion 30a is as shown in FIG. The upper part of the envelope 20 is made to penetrate in the plate thickness direction, slightly protrudes to the outside, and is hermetically sealed with glass beads 31.

The protruding end of the pin-shaped portion 30a of the lead wire 30 is one of a plurality of embedded lead wires 30b formed by printing or the like outside the outer glass coating 20 of the envelope 20, as shown in FIG. Is electrically connected to

The buried lead wires 30b are formed in the same number as the number of the anodes 28a to 28p, and are arranged on the outer peripheral surface of the outer glass coating 20c of the envelope 20 at a required pitch in the circumferential direction.

Since the outer surfaces of these buried lead wires 30b, 30b... Are covered with the outermost glass coating 20e which is further entirely applied to the outer peripheral surface of the outer glass coating 20c, each buried lead wire 30b and each outer surface are It is electrically insulated.

Further, each embedded lead wire 30b is exposed on the outer surface as a terminal on the bottom surface of the envelope 20, and this terminal further has an external lead wire.
30c is electrically connected.

That is, the buried lead wire 30b, which is a part of the lead wire 30, is buried in the electric insulating film formed by the outer glass film 20c and the outermost glass film 20e of the envelope 20, and is almost certainly insulated. I have.

On the other hand, for the lead wires 30 such as the anodes 28f and 28f (see FIG. 1) disposed on the inner peripheral portion of the tapered tube 24, the tip of the pin-shaped portion 30a is connected to the tapered tube 2 made of an electrical insulator.
Bottom embedded lead wire 3 formed by printing etc. on the bottom of 4
It is electrically connected to 0d.

A bottom glass coating 20f is entirely coated on the upper surface of the embedded bottom lead 30d, and electrically insulates the outer surface of each embedded bottom lead 30d.

The tip of the bottom embedded lead wire 30d is electrically connected to another one of the embedded lead wires 30b.

Therefore, all the lead wires 30 connected to all the anodes 28a to 28p are electrically connected to the external lead wire 30c on the bottom surface of the envelope 20 in one-to-one correspondence, and these external lead wires 30c are connected to each other. It is electrically connected to a lighting circuit (not shown).

A transparent plate 32 made of transparent glass is fitted and fixed in the upper step portion 20a of the envelope 20 on the partition plate 25, and the interior of the envelope 20 is hermetically sealed.

Therefore, the air in the envelope 20 is exhausted through the exhaust pipe 23, and after that, an appropriate amount of mercury and a rare gas are introduced, and then the outer end of the exhaust pipe 23 is pinched off.

 Next, the operation of the present embodiment will be described.

When a required voltage is applied to the cathode 22 and a required anode, for example, 28h, a discharge occurs between the cathode 22 and the anode 28h.

This discharge is generated in the light emitting chamber 2 having the anode 28h through the discharge hole 27.
6h, where mercury atoms are excited to generate ultraviolet light, and the fluorescent film in the light emitting chamber 26h is excited to emit light of a required color, and this light is emitted from the transparent plate 32 on the display surface. Irradiated toward

As described above, the buried lead wires 30b, which are part of all the lead wires 30 of all the anodes 29a to 29p, are electrically insulated from each other or the envelope 20 by the glass coatings 20c, 20e. All the lead wires
The insulation of 30 is ensured, and insulation failure can be prevented.

Also, since the external lead wires 30c are regularly pulled out from the bottom surface of the envelope 20 at a required pitch in the circumferential direction, the handling of the envelope 20 is facilitated. .. 29p and all the external lead wires 30c can be accurately and easily associated with each other, thereby preventing erroneous connection when the external lead wire 30c is electrically connected to a lighting circuit or the like.

FIG. 5 shows another embodiment of the present invention, in which fine wool 40 made of glass or ceramics is accommodated in each of the light emitting chambers 26a to 26p of the above embodiment. Is a gas that has been sufficiently degassed, and may or may not be coated with a phosphor, but it is preferable to apply the phosphor because the amount of light emission can be increased.

Fine wool 40 is an electrically insulating fiber such as glass wool or ceramic fiber, and has a cathode 22 and an anode.
Electrons at the time of discharge with 28a to 28p collide and try to prevent the discharge, the potential gradient of the discharge space is improved,
More watts (W) can be input, and miniaturization and high luminance can be achieved.

Note that the present invention is not limited to the fine wool 40, and any material or shape may be used as long as it prevents discharge.

〔The invention's effect〕

As described above, in the present invention, an electric insulating film is applied to the outer surface of the envelope and the surface of the fluorescent film-coated object, and the electric insulating film is electrically connected to the plurality of electrodes by at least a part of the electric insulating film. Since at least a part of the lead wire is buried and drawn out of the envelope, electrical insulation of each lead wire is ensured, and a part of each lead wire is fixed around the envelope. Therefore, the handling becomes easy, and the workability in the subsequent manufacturing process can be improved.

[Brief description of the drawings]

1 is a longitudinal sectional view of FIG. 2, FIG. 2 is an external perspective view of one embodiment of a fluorescent lamp according to the present invention, and FIG. 3 is III in FIG.
FIG. 4 is an enlarged view of a part IV in FIG. 1, FIG. 5 is a longitudinal sectional view of another embodiment of the present invention, and FIG. 6 is an external perspective view of a conventional fluorescent lamp. 20 ... envelope, 20 b ... inner glass coating, 20 c ... outer glass coating, 20 e ... outermost glass coating, 20 f ... bottom glass coating, 22 ... cathode (common electrode), 24 ... tapered cylinder (Fluorescent film-coated body), 25 ... Partition plate (partition member), 26a-2
6p …… Emission room.

Claims (1)

(57) [Claims] 1. A light-transmitting plate, a fluorescent-film-coated body which is expanded toward the light-transmitting plate and has a fluorescent film adhered on an inner surface thereof, and the light-transmitting plate and a fluorescent light A partition member for dividing a light-emitting chamber formed by the film-coated body into a plurality of light-emitting chambers, a plurality of electrodes provided respectively corresponding to these light-emitting chambers, and a pair of these electrodes; A fluorescent lamp having an envelope in which a common electrode facing in the vertical direction is built and an electrical insulating film is applied to an inner peripheral surface of the fluorescent lamp. A coating is applied, and at least a part of the lead wire electrically connected to the plurality of electrodes is buried by at least a part of the electric insulating coating, and the lead wire is configured to be drawn out of the envelope. Features fluorescent lamp.