JPH0471160A - Fluorescent lamp - Google Patents

Abstract

PURPOSE:To ensure electrically insulating lead-wires from one another by laying electrically-insulating films respectively upon the outer face of an envelope and the surface of a fluorescent film-laid body, and then burying at least one part of each of the lead-wires electrically connected respectively to plural electrodes in at least one part of each of these electrically-insulating films so as to be drawn out of the envelope. CONSTITUTION:The same number of buried lead-wires 30b as anodes 28a to 28p is formed, and the outer face of an envelope 20 has its outer circumferential face of an outside glass film 20c coated with outermost side glass-film 20e which is further laid all over the outer circumferential face via each of the buried lead-wires, so that the respective buried lead-wires 30b are insulated electrically from one another while the respective outer-faces thereof are electrically insulated from one another. Furthermore, each of the buried lead-wires 30b at the bottom face of the envelope 20 is exposed as a terminal to the outer face of the envelope, and an outer lead-wire 30c is further connected electrically to the terminal. That is, the buried lead-wires 30b each forming part of a lead wire 30 are respectively buried in an electrically-insulating film formed out of both the outside glass-film 20c of the envelope 20 and the outermost side glass-film 20e so as to be almost surely insulated from one another.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a single-tube fluorescent lamp that emits multicolor light and is suitable for a color light-emitting display element of a large-sized color electronic display device. The present invention relates to a fluorescent lamp with an improved method for drawing out lead wires for a plurality of electrodes.

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

This fluorescent lamp 1 is called a single-tube monochromatic or single-tube multicolor fluorescent lamp, and as shown in FIG. By widening the width significantly, an upper step portion 2a having, for example, a quadrangular planar shape is formed.

Further, the envelope 2 has a cathode 4, which is a common electrode implanted on the button stem 3, erected on the inner bottom surface thereof, and a tapered tube 5 in the shape of a tapered tube is inserted and fixed in the upper step 2a. ing.

Inside the tapered tube 5, there is a lattice-shaped partition plate 6 as shown in FIG.
For example, 16 light emitting chambers 7a are arranged in 4 rows and 4 columns.
~7p are each divided.

Each light emitting chamber 7a to 7 is provided on the inner surface of the tapered tube 5 and the partition plate 6.
A fluorescent film is deposited on each p.

Each of the light emitting chambers 7a to 7p has a plurality of electrodes, ie, anodes 8a to 8p, disposed at each corner thereof, and a discharge hole (not shown) is disposed at each inner corner, so that the cathode 4 is energized. By selectively energizing the anodes 8a to 8p, a discharge is generated between the cathode 4 and the anodes 8a to 8p, and the discharge is selectively passed through the discharge holes to cause the light emitting chambers 7a to 7p to selectively emit light. The light is emitted from the transparent plate 9 to the outside.

(Problem to be Solved by the Invention) However, since the number of anodes 8a to 8p is relatively large in such a conventional fluorescent lamp 1, many lead wires 10a are electrically connected to these anodes 8a to 8p, respectively. .about.10p hangs down from the envelope 2 near each of the anodes 8a to 8p and is drawn out to the outside in a disordered manner.

For this reason, many lead wires 10a to 10p are connected to the envelope 2.
Since the lead wires 10a to 10p are not easy to handle because they become entangled with each other, the electrical insulation treatment of these lead wires 10a to 10p is complicated.
It is not easy to confirm the correspondence with a to 8p, and the lead wire 10
There is a risk that an error will occur in the connection between a to 10p and a lighting circuit (not shown).

Therefore, the present invention has been made in consideration of the above circumstances, and its purpose is to provide a fluorescent lamp that can reliably and easily electrically insulate the lead wires of multiple electrodes and improve manufacturing workability. It is about providing.

[Structure of the invention]

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

In other words, the present invention comprises a light-transmitting plate, a fluorescent film-adhered body that expands toward the light-transmitting plate and has a fluorescent film adhered to its inner surface, and the light-transmitting plate and the fluorescent film-adhered body. A partition member that divides the light emitting chamber to be formed into a plurality of light emitting chambers, a plurality of electrodes provided corresponding to each of the light emitting chambers, and a common electrode that is paired with these and faces substantially perpendicularly to the transparent plate. In a fluorescent lamp having a built-in envelope and having an electrically insulating film coated on the inner peripheral surface, an electrically insulating film is coated on the outer surface of the envelope and the surface of the fluorescent film adherend, and these electrical The present invention is characterized in that at least a portion of the lead wire electrically connected to the plurality of electrodes is embedded in at least a portion of the insulating coating and drawn out to the outside of the envelope.

(Function) At least a portion of the lead wires of the plurality of electrodes are embedded in the electrically insulating coating of at least one of the envelope and the partition member and are drawn out of the envelope.

Therefore, the electrical insulation of the lead wire is ensured, and
Since each lead wire is fixed to the envelope layer, its handling becomes easy and the workability of the subsequent manufacturing process can be improved.

(Example) An example of the present invention will be described below based on FIGS. 1 to 5.

FIG. 1 is a vertical sectional view of FIG. 2, and FIG. 2 is an external perspective view of an embodiment of the present invention. It is formed into a cylindrical shape with a bottom, and one end in the axial direction (the upper end in FIGS. 1 and 2) is open.

The upper part of this opening is widened into a rectangular cylindrical shape, thereby forming an upper step part 20a having a rectangular planar shape, for example.

As shown in FIG. 3, an inner and outer glass coating 20b is provided on the entire inner circumferential surface of the envelope 20 from the upper end of the upper step portion 20a to the lower bottom of the envelope 20, and on the entire outer circumferential surface of the envelope 20.

20c, and the inner glass coating 20b prevents the internal impurity gas from being released from the metal envelope 20 when a discharge occurs within the envelope 2o. At the same time, it increases the strength against external pressure.

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

Further, a glass exhaust pipe 23 is integrally protruded from the lower opening periphery of the center hole of the button stem 21 and extends outward from the bottom center hole 20c of the envelope 20.

The envelope 20 is fixed by inserting a tapered tube 24, which is a fluorescent film adherend, into the upper step 20a of the envelope 20.
A square lattice-shaped partition plate 25 is fitted coaxially into the inside of the tapered tube 24, and as shown in FIG. Each is separated.

The tapered tube 24 is made up of four electric insulators in the shape of a truncated pyramid with a bottom that expands upward in the figure, arranged in a square lattice shape and integrally bonded to each other, and has discharge holes 27 in the bottom for each light emission. Room 26a
A hole is drilled every ~26p.

For example, green (G), blue (B),
Each is coated with a fluorescent film that emits red (R) light.

Each of the light emitting chambers 26a to 26p has a small diameter cylindrical shape, e.g.
Six anodes 28a to 28p are arranged one by one.

Each lower end of each anode 28a to 28d is connected to each lead wire 30.
electrically connected to.

Among these lead wires 30, for the anode arranged on the outer periphery of the tapered tube 24, for example, the lead wire 30 such as 28h (see FIG. 1), the tip of the pin-shaped portion 30a is as shown in FIG. The upper part of the envelope 20 is penetrated in the thickness direction to slightly protrude to the outside, and is hermetically sealed with a glass bead 31.

As shown in FIG. 3, the protruding a end portions of the pin-shaped portions 30a of the lead wires 30 are connected to a plurality of buried lead wires 30b formed by printing or the like on the outside of the outer glass coating 20 of the envelope 20.
electrically connected to one of the

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

The outer surfaces of these buried lead wires 30b, 30b, .
Each buried lead wire 30b and each outer surface are electrically insulated.

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

In other words, the buried lead wire 30b that is a part of the lead wire 30
is embedded in the electrically insulating coating formed by the outer glass coating 20c and the outermost glass coating 20e of the envelope 20,
It is completely insulated.

On the other hand, lead wires 30 of the anodes, such as 28f and 28f (see FIG. 1), arranged on the inner circumference of the tapered cylinder 24
The tip of the pin-shaped portion 30a is electrically connected to a bottom buried lead wire 30d formed by printing or the like on the bottom surface of the tapered tube 24 made of an electrical insulator.

A bottom glass coating 2Of is entirely deposited on the upper surface of the bottom buried lead wire 30d, and each bottom buried lead wire 30d is covered with a bottom glass coating 2Of.
The outer surface of d is electrically insulated.

The tip of the bottom buried lead wire 30d is connected to the buried lead wire 30.
It is electrically connected to the other one of b.

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

A partition plate 25 is provided in the upper step portion 2Oa of the envelope 20.
A light-transmitting plate 32 made of transparent plate glass is fitted and fixed on the top, and the inside of the envelope 20 is hermetically sealed.

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

Next, the operation of this embodiment will be explained.

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

This discharge enters a light emitting chamber 26h equipped with an anode 28h from the discharge hole 27, where it excites mercury atoms to generate ultraviolet rays, and excites the fluorescent film in the light emitting chamber 26h to emit light in a desired color. Light is emitted outward from the transparent plate 32 on the display surface.

As described above, the buried lead wires 30b and 30b are part of all the lead wires 30 of all the anodes 29a to 29p.
... are electrically insulated from each other or from the envelope 20 by the glass coatings 20c and 20e, and are led out, so that the insulation of all the lead wires 30 is ensured and insulation defects are prevented. I can do it.

Furthermore, since the external lead wires 30c are drawn out from the bottom surface of the envelope 20 in an orderly manner at required pitches in the circumferential direction, handling of the envelope 20 is facilitated, and the entire Anodes 29a to 29p and all external lead wires 30c
... can be made to correspond accurately and easily, and erroneous connection when electrically connecting the external lead wire 30c to a lighting circuit or the like can be prevented.

FIG. 5 shows another embodiment of the present invention, in which a fine wool 40 made of glass or ceramics is housed in each of the light emitting chambers 26a to 26p of the above embodiment. The phosphor has been sufficiently vented and may or may not be coated with a phosphor, but it is preferable to coat the phosphor because the amount of light emitted can be increased.

The fine wool 40 is an electrically insulating fiber such as glass wool or ceramic fiber, and is intended to prevent the discharge by colliding electrons during discharge between the cathode 22 and the anodes 28a to 28p, and to reduce the potential gradient in the discharge space. It is possible to input more watts (W), and it is possible to achieve a smaller size and higher brightness.

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.

〔Effect of the invention〕

As explained above, the present invention provides electrically insulating coatings that are coated on the outer surface of the envelope and the surface of the fluorescent film adherend, and that electrically connected to a plurality of electrodes by at least a portion of these electrically insulating coatings. Since at least a portion of the lead wire is buried and pulled out to the outside of the envelope, electrical insulation of each lead wire is ensured, and a portion of each lead wire is fixed to the envelope layer. Therefore, its handling becomes easy, and the workability in the subsequent manufacturing process can be improved.

FIG. 1 is a vertical sectional view of FIG. 2, FIG. 2 is an external perspective view of an embodiment of the fluorescent lamp according to the present invention, FIG. 3 is an enlarged view of the section ■ in FIG. 1, and 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, 20b... Inner glass coating, 20
c...Outer glass coating, 20e...Outermost glass coating, 20f...Bottom glass coating, 22...Cathode (common electrode), 24...Tapered tube (fluorescent film adherend),
25... Partition plate (partition member), 26a-26p...
Luminous room.

a.Applicant's agent Hisashi Nami Tano

[Brief explanation of the drawing]

No. figure Figure 5 Figure 2 s3 diagram 10ρ Figure 6

Claims (1)

[Claims] A light-transmitting plate, a fluorescent film adherend that expands toward the light-transmitting plate and has a fluorescent film coated on its inner surface, and a light-emitting chamber formed by the light-transmitting plate and the fluorescent film adherend. A partition member that divides the light-emitting chamber into a plurality of light-emitting chambers, a plurality of electrodes provided corresponding to each of the light-emitting chambers, and a common electrode paired with these and facing substantially perpendicularly to the light-transmitting plate are built-in, and the inner periphery is In a fluorescent lamp having an envelope having an electrically insulating coating on its surface, an electrically insulating coating is coated on the outer surface of the envelope and the surface of the fluorescent film adherend, and at least one of these electrically insulating coatings is A fluorescent lamp characterized in that at least a portion of a lead wire electrically connected to the plurality of electrodes is buried and drawn out to the outside of the envelope.