JPH04163850A - Fluorescent lamp for display - Google Patents

Abstract

PURPOSE:To simplify wiring of leads by joining light emission chambers at the end face where the anode spacing is widest. CONSTITUTION:Light emission chambers 22L, 22R of a fluorescent lamp for displaying 20 are joined rigidly, and electrode chambers 27L, 27R are solidly connected with another electrode chamber 27a having a long circular plane, and there in the central part of the inner bottom, a cathode 28 is installed upright. As the electrode chamber 27a is formed inside of anodes 25aL-25dL, 25aR-25dR of other flurescent lamps for displaying 21L, 21R, leads are not needed to pass through an electrode chamber 26a which conducts electric discharge, and there is no need to apply an electric insulation process, so that wiring of the leads is simplified. Because the spacing of alpha adjoining anodes on the joining plane 0 of laps 21L, 21R with each other is narrower than the spacing beta of the other anodes, it is a terminal surface where no more lamp 21 can be joined at the external end face of the spacing alpha while the spacing betais an end face where lamp 21 joining is possible. This can increase the degree of freedom in the direction in which lamps 21 in a plural number constituting one picture element are joinable, and heightens the degree of freedom where a required picture field can be formed.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention provides a display fluorescent lamp suitable for use as a display element of an electronic display panel, a light emitting element of decorative lighting, etc. In particular, the present invention relates to a display fluorescent lamp having a single tube and a plurality of pixels.

(Prior Art) Conventionally, as an example of this type of display fluorescent lamp,
Some devices are constructed as shown in FIGS. 4 to 16.

This display fluorescent lamp 1 is a single tube that emits multicolor light, and a cathode 3 serving as a common electrode is enclosed in a bottomed cylindrical envelope 2 made of stainless steel or the like, and the inside thereof is connected to an electrode. It is formed in the chamber 3a.

The envelope 2 has its open end (the upper end in FIG. 16) successively widened into a rectangular tube shape in two upper and lower stages 2a and 2b, and is inserted into these open ends 2a and 2b upward in FIG. A tapered tube 4 with a bottom that expands into a tapered shape is built in concentrically, and a display plate 5 made of transparent glass is fitted into the open end of the envelope 2, thereby turning the inside of the tapered tube 4 into a light-emitting chamber. is forming.

In addition, the tapered tube 4 has a cross-shaped partition plate 6 concentrically fitted therein, and has, for example, four light emitting chambers 6a having a rectangular planar shape,
The light emitting chamber is divided almost equally into 6b, 6c, and 6d.

Each of the light emitting chambers 6a to 6d has green (G), blue (
B), a phosphor film 7 that emits light in green (G), and red (R) is respectively deposited, and one pixel is formed by four light emitting chambers 6a to 6d.

The tapered cylinder 4 has discharge holes 7a, 7b, 7c, and 7d drilled in its bottom for each of the light emitting chambers 6a to 6d, and four anodes 8a and 4 anodes are provided at diagonal positions of the discharge holes 7a to 7d, respectively.
8b, 8c, and 8d are built in, and these anodes 8
A to 8d can be selectively discharged with the cathode 3, which is a common electrode.

Each anode 8a to 8d has four pin-shaped lead wires 9...
These lead wires 9... penetrate vertically outward through the bottom of the lower step 2b of the envelope 2 and hang down on the outside of the envelope 2 approximately parallel to its central axis. However, like the cathode 3, it is electrically connected to a lighting circuit (not shown).

In FIG. 16, reference numeral 10 denotes an exhaust pipe, through which the electrode chamber 3a and the light emitting chamber are evacuated, and after the exhaust, mercury and rare gas are sealed.

On the other hand, the conventional display fluorescent lamp 11 shown in FIG.
In the rectangular tube-shaped light emitting chamber part 12, three light emitting chambers 13a emitting red (R), green (G) and blue (B) light, respectively,
With 13b and 13c as one pixel, two pixels each are arranged in two rows in the horizontal direction, making a total of six light emitting chambers 13a.
, 13a-13C% 13c, one common electrode, the cathode 14, is shared.

In addition, in FIG. 17, the reference numeral 15 is an anode, and the reference numeral 16 is a discharge hole.

(Problems to be Solved by the Invention) In the conventional display fluorescent lamp 11 configured as described above, the cathode 1 is
4 in common, it is possible to save power for preheating each anode 15 of the cathode 14, which is constantly energized for preheating.

In other words, the preheating power for the cathode 14 is
3c is almost constant regardless of the number of chambers, so the light emitting chamber 1
3a to 13c1, ie, the number of anodes 15 increases, the power consumption per anode 15 decreases.

However, such a conventional display fluorescent lamp 11
Now, light emitting chamber 1 is placed in the left and right direction in the figure (in the direction of the solid line arrow in the figure).
3a to 13c can be added, but two or more rows cannot be added in the front-rear direction in the figure (in the direction of the broken line arrow in the figure).

If light emitting chambers 13a to 13c are added in the front and back direction,
Each discharge hole 16 and cathode 1 of each light emitting chamber 13a to 13c
In order to communicate with the electrode chamber 4, the inner diameter of the envelope 17 housing the cathode 14 must be increased. In this case, each lead wire 18 electrically connected to each anode 15 needs to be electrically insulated and passed through the envelope 17 in which discharge occurs.

However, this has an adverse effect on the discharge characteristics of the cathode 14 and each anode 15, and in addition, these lead wires 18 and
. . requires a complicated process of electrically insulating each of them, which poses a problem of increasing costs.

Therefore, this invention was made in consideration of such circumstances, and its purpose is to have a high degree of freedom in the direction of expanding the light emitting chamber.
Moreover, the object is to provide an inexpensive display fluorescent lamp.

[Structure of the invention]

(Means for Solving the Problems) This invention provides the following advantages when a plurality of display fluorescent lamps forming one pixel are integrally joined to form a plurality of pixels with a single tube.
When considering the simplification of processing the anode lead wires, this was done by noting that there are parts where it is easy to join the light emitting chambers together, and there are parts where it is difficult.

FIG. 12 is a schematic diagram showing the principle of this invention, and in the figure,
The display fluorescent lamp 20 is made by arranging two display fluorescent lamps 21 shown in FIG. 13 side by side and joining them together in the horizontal direction, and the main feature is the joining method.

In other words, the display fluorescent lamp 21 is constructed almost in the same way as the display fluorescent lamp 1 shown in FIGS. 24b.

The light emitting chambers 24a to 24d are divided into approximately equal parts 24c and 24d, respectively, and discharge holes 25a and 25b are provided in these light emitting chambers 24a to 24d.

25c, 25d and the anode 2 located diagonally thereto.
6a, 26b, 26c, and 26d, respectively, and a cathode 28 and an anode 26a in the electrode chamber 27 shown by broken lines in the figure.
-26d are made to pass through the discharge holes 25a-25d, respectively.

The display fluorescent lamp 20 includes, for example, two of the display fluorescent lamps 21 configured in this manner, as shown in FIG. The two left and right light emitting chambers 22L, 22R are joined together, and the two electrode chambers 27L, 27R are arranged in a single structure with an oval plane. Electrode chamber 27a
The cathode 28 is integrally connected to the cathode 28, and one cathode 28 is erected on the center of the inner bottom thereof.

In plan view, the electrode chamber 27a includes the anodes 25aL to 25dL, 25 of the left and right pair of display fluorescent lamps 21L, 21R.
Since it is formed inside aR~25dR, each anode 2
Even if the lead wires (not shown) connected to 5aL to 25dL and 25aR to 25dR are extended perpendicularly toward the back side of FIG. 13, these lead wires do not need to pass through the electrode chamber 26a where discharge occurs. There is no need to perform electrical insulation treatment on each, and the wiring of the lead wires can be simplified.

In the display fluorescent lamp 20 configured as described above, adjacent anodes on both sides of the joint surface O between the two display fluorescent lamps 21L and 21R, for example, 25c
The distances α between L and 25bR, and between 25dL and 25aR are different from those between other anodes, for example, between 25aL and 25bL, and between 25dL and 25aR.
Since the distances between 5bL and 25cL and between 25dL and 25aR are narrower than the distances β, no other display fluorescent lamp 21 can be joined to the outer end surface of this distance α.

In other words, if another display fluorescent lamp 21 is connected to the outer end face of this interval α, the anodes 25cL and 25bR at both ends of this interval α will cut into the electrode chamber 26a in plan view. It becomes like this.

In that case, the lead wires electrically connected to the anodes 25cL and 25bR at the interval α are connected to the electrode chamber 27a.
In that case, the electrode chamber 26a
Since discharge occurs inside the device, it is necessary to electrically insulate the insertion portions of these lead wires, which makes lead wire processing and wiring extremely complicated.

On the other hand, regarding the interval β, even if any outer end surface of the display fluorescent lamp 21 shown in FIG. 13 is joined to the outer end surface,
Each anode 25aL to 25dL.

The electrode chamber 27 can be easily formed so that the lead wires 25aR to 25dR pass through the outside of the electrode chamber 27 without passing through the interior of the electrode chamber 27.

In other words, the outer end surface of the interval α is here the display fluorescent lamp 2.
1 is a terminal end face that cannot be joined any further, and the interval β is a joining end face to which a display fluorescent lamp 21 can be joined to the outer end face.

Moreover, the outer end surface of this interval β is as shown in FIG.
They are formed in four directions of the display fluorescent lamp 20: top, bottom, left and right.

Therefore, according to the present invention, there is a high degree of freedom in the direction in which a plurality of display fluorescent lamps 21 forming one pixel can be joined;
There is a high degree of freedom in forming the required screen.

In addition, one cathode 28 may be replaced by a plurality of anodes 25aL.
Since it is shared by ~25dL and 25aR~25dR, it is possible to reduce the preheating power of the cathode 28 for each of these anodes.

Furthermore, each anode 25aL ~ 25dL, 25aR ~
25dR, respectively, to the electrode chamber 27.
Since the wires do not pass through the inside of the lead wire, wiring of these lead wires can be simplified.

The present invention is constructed as follows based on this principle.

In other words, the present invention provides a plurality of light emitting chambers in which four square light emitting chambers each having a discharge hole and an anode located diagonally therewith are arranged in a square lattice, and a plurality of light emitting chambers each having a discharge hole in each of the light emitting chambers. electrode chambers that are arranged in series so as to communicate through the plurality of light emitting chambers, form an airtight space together with the light emitting chambers, and house a common electrode that can be preheated and performs discharge between the plurality of light emitting chambers; The chambers are connected to each other at the end surfaces where the distance between adjacent anodes is widest, and the electrode chamber is connected to the light emitting chamber avoiding the anode.

(Operation) The common electrode is always energized and preheated, and by selectively applying voltage between the common electrode and the plurality of anodes, a discharge occurs between the two electrodes.

This discharge enters a light-emitting chamber equipped with an anode to which a voltage is applied through a discharge hole, excites the fluorescent film, and emits light.

The common electrode is shared by multiple anodes, and the preheating power for the common electrode is constant regardless of the number of anodes.
The real common electrode preheating power is reduced.

Further, since the plurality of light emitting chambers are joined at the end faces where the distance between adjacent anodes is the widest, the discharge path of the electrode chamber can be passed through this wide distance.

Therefore, the discharge path in the electrode chamber can be prevented from becoming narrow and the discharge impedance can be prevented from becoming low.
Since the anode and the electrode chamber can be prevented from overlapping in the extending direction of the anode lead wire, the lead wire can be passed through the outside of the electrode chamber without passing through it.

Therefore, as when passing the lead wire into the electrode chamber,
There is no need to electrically insulate the lead wires, making it possible to simplify the processing or wiring of the lead wires and reduce costs.

(Example) Hereinafter, an example of the present invention will be described based on FIGS. 1 to 11. In addition, in these figures, common parts are given the same reference numerals.

FIG. 2 is a perspective view of the first embodiment of the present invention, and in the figure, a display fluorescent lamp 31 is shown in a bottomed cylindrical electrode chamber
A bottomed square cylindrical light emitting chamber 33 is integrally connected to the top.

As shown in FIGS. 1 to 4, the electrode chamber 32 has an envelope 34 made of, for example, stainless steel, which is formed into a bottomed cylindrical shape with a U-shaped axial cross section. A cathode 35, which is a common electrode, is erected on the central portion thereof, and an electrode chamber 35a is formed inside the cathode 35.

Further, as shown in FIG. 3, the envelope 34 has an exhaust pipe 36 protruding from its bottom so that one end thereof protrudes outside, and the air in the electrode chamber 35a is exhausted through this exhaust pipe 36. At the same time, after the exhaust, mercury and rare gas are sealed.

The tips of a pair of lead wires 35a and 35b that support both ends of the cathode 35 shown in FIG. 4 extend vertically outward from the bottom of the envelope 34 in an airtight manner, and are electrically connected to a lighting circuit (not shown). be done.

On the other hand, the rectangular tube-shaped light emitting chamber 33 is located at the open end of the envelope 34 (
For example, they are integrally and concentrically connected on the upper end (in FIGS. 2 and 3), and constitute a plurality of pixels, four pixels in this embodiment.

In other words, the light-emitting chamber section 33 has the light-emitting chambers of the display fluorescent lamp 20 shown in FIG. 12 arranged vertically symmetrically with the lower side of the figure as the axis of symmetry OO. For example, four light-emitting chambers 37
a, 37b, 37c, and 37d are arranged in a square grid and are joined together to form four pixels.

Each of the light emitting chambers 37a to 37d is, for example, blue (B), green (G),
A light-emitting chamber a that emits red (R) and green (G) light, respectively;
b, c, and d are integrally arranged in a square grid, and a display plate 38 made of a transparent glass plate or the like is sealed at the upper end of the opening of the light emitting chamber 33.

Each of the light emitting chambers a to d has a plurality of vertical and horizontal partition walls 39a.

39b, each of which is divided into approximately equal parts, and a phosphor film that emits red (R), green (G), and blue (B) is coated on its inner surface, and each light emitting chamber a - d For example, a circular discharge hole 40 is bored in the bottom of each of the discharge holes.

Each discharge hole 40 is connected to each light emitting chamber 37a to 3 as shown in FIG.
7d, the electrode chamber 35 is indicated by a broken line in the figure.
Above a, the bottom of the light emitting chamber 33 is bored,
Each of them communicates with the electrode chamber 35a.

Further, each of the light emitting chambers a to d has an anode 41 built in at one corner thereof, and each anode 41 is located on a diagonal line with respect to each discharge hole 40, and moreover, as shown in FIG. It is located outside the outline of the electrode chamber 35a.

Therefore, each lead wire 42 electrically connected to each anode 41 extends along the axial direction of the outside of the electrode chamber 35a, that is, the outside of the envelope 34, as shown in FIGS. 2 and 3. It can be extended to the outside and electrically connected to a lighting circuit (not shown).

The cathode 25 is constantly energized and preheated by this lighting circuit, and when a voltage is selectively applied between the cathode 35 and the plurality of anodes 41, one or more anodes 41 and one Discharge occurs between the cathodes 35 and the light emitting chamber a has the anode 41 which is energized.
-d is emitted.

In the display fluorescent lamp 31 of this embodiment, the light emitting chamber 33 is configured to be horizontally symmetrical about the longitudinal symmetry axis OV in FIG. Therefore, the light emitting chamber 33 can be easily molded, and the display fluorescent lamp 31 can be manufactured more easily.

Also, since the distance α between the anodes 41 and 41 on the left and right sides of the axis of longitudinal symmetry O is narrower than the other distances β, similar to the distance α shown in FIG. It cannot be the joint surface with the light emitting chamber, and the interval β is the joint surface.

Therefore, since this display fluorescent lamp 31 has eight outer end surfaces with the interval β in the vertical and horizontal directions in the figure, it is possible to connect other light emitting chambers here and increase the number of pixels as appropriate. The expansion direction can also be set in four directions, up, down, left and right, giving a high degree of freedom.

Furthermore, in this display fluorescent lamp 31, the axial cross-sectional shape of the electrode chamber 35a is formed into a U-shape so that the anodes 41 are not located above the electrode chamber 35 on the plane, so each anode 41 lead wires 42 can be passed through the outside of the envelope 34 without passing through the electrode chamber 35a.

Therefore, the electrical insulation treatment of the lead wires 42 can be omitted, and the treatment or wiring of these lead wires 42 can be simplified.

Furthermore, one cathode 35 is connected to a plurality of anodes 41...
Since the cathode 35 is shared by the anode 41, the preheating power of the cathode 35 per anode 41 can be saved.

In addition, in the embodiment described above, the envelope 3 forming the electrode chamber 35a
4 is formed so that its axial cross-sectional shape is U-shaped, but the present invention is not limited to this. For example, the display fluorescent lamp shown in FIGS. Like the lamp 51, an envelope 5 forming an electrode chamber 52
3 may be configured such that its axial cross-sectional shape is H-shaped, and the discharge holes 40 of the light emitting chambers 37a to 37d...
The positions of . . . and the anode 41 . . . may be changed as appropriate.

In other words, this display fluorescent lamp 51 has its light emitting chamber 33
Since the positions of the discharge holes 40 and anodes 41 of the light emitting chambers a to d are different from those of the display fluorescent lamp 31 of the first embodiment, the shape of the envelope 53 is formed into an H-shape. It is.

In this display fluorescent lamp 51, similarly to the first real male side, each light emitting chamber 37 a
〜37d are connected to each other, and the light emitting chambers 37a to 37d
Further, another light emitting chamber can be joined at the outer end surface with the interval β.

Since the outer end surfaces of the light emitting chambers 37a to 37d having the interval β are formed in the vertical and horizontal directions in FIG. 6, there is a high degree of freedom in the direction in which the light emitting chambers are added.

Furthermore, since each anode 41 can be passed through the outside of the electrode chamber 52, electrical insulation treatment for these lead wires 42 can be omitted.

Furthermore, as in the first embodiment, the power required to preheat the cathode 35 of each anode 41 can be saved.

In addition, in this display fluorescent lamp 51, each light emitting chamber a
-d, the positions of the required discharge holes 40... and the anodes 41 may be changed as appropriate, as shown in FIG.

Further, the present invention is not limited to the number of light emitting chambers 37a to 37d that form one pixel; for example, the display fluorescent lamp 61 shown in FIG. 10 and the display fluorescent lamp 71 shown in FIG. The light emitting chamber, or 8 pixels, is formed by a single tube.

In other words, the display fluorescent lamp 61 consists of two of the light emitting parts 33 of the display fluorescent lamp 31 shown in FIGS. Two U-shaped electrode chambers 35a, 35 are arranged between the end faces.
An envelope 63 is formed so as to communicate with each other to form one electrode chamber 62 that repeatedly meanders in a U-shape, and one cathode 3 is placed in the middle part of this electrode chamber 62 in the meandering direction.
5 are installed.

The display fluorescent lamp 71 shown in FIG. 11 is constructed by joining the two light emitting parts 33 of the display fluorescent lamp 51 shown in FIGS. The envelope 73 is formed so that the two H-shaped electrode chambers 52 and 52 communicate with each other at the end surfaces to form one electrode chamber 72 that repeatedly meanders in an H-shape, and the meandering direction of the electrode chamber 72 is One cathode 35 is arranged in the middle part.

These display fluorescent lamps 61. ．． 71 can also achieve substantially the same effects as the first embodiment, and further power saving for preheating the cathode 35 can be achieved by the increase in the number of anodes 41.

〔Effect of the invention〕

As explained above, in the first to third inventions of the present application, since the plurality of light emitting chambers are joined to each other at the end face where the distance between adjacent anodes is the widest, the distance between the adjacent anodes is the widest. It is also possible to pass the discharge path in the electrode chamber.

Therefore, the lead wires connected to the plurality of anodes and the electrode chamber can be prevented from overlapping in the direction in which the lead wires extend outward, so that these lead wires can be passed outside the electrode chamber.

Therefore, the electrical insulation treatment of the plurality of lead wires can be omitted, and the wiring of the lead wires can be simplified.

Further, since the common electrode is shared by the anodes of a plurality of light emitting chambers, it is possible to save power for preheating by the common electrode per anode.

[Brief explanation of drawings]

1 is a plan view of FIG. 2, FIG. 2 is a perspective view of an embodiment of the display fluorescent lamp according to the present invention, FIG. 3 is a front view of FIG. 2, and FIG. 4 is a plan view of FIG. IV-IV line arrow sectional view, 5th
6 is a plan view of FIG. 5, FIG. 7 is a front view of FIG. 5, and FIG. 8 is a perspective view of another embodiment of the invention.
9 is a plan view of a modified example of the embodiment of the present invention shown in FIG. 6 etc., and FIGS. A plan view, FIGS. 12 and 13 are schematic diagrams each explaining the principle of the present invention, FIG. 14 is a perspective view of a conventional display fluorescent lamp, and FIG. 15 is a left side view of FIG. 14, and FIG. Figure 16 is the first
5 is a sectional view taken along the line XVI-XVI, and FIG. 17 is a perspective view of another conventional example. 20.21.31.51,61. ．． 71... Fluorescent lamp for display, 22... Light emitting chamber, 24a to 24d. a-d...Light-emitting chamber, 25a-25d, 40...
discharge holes, 26 a to 26 d, 41-anode,
27, 27a, 35a, 52, 62.72... Electrode chamber, 42... Lead wire. Applicant's agent Hisashi Hatano 1wJ Figure 13 Figure 41I 5gm 6aa Figure 7 Figure 8 Figure 10 Figure 12ea Building 13+a 141!1 Figure 15 Figure 16

Claims (1)

[Scope of Claims] 1. A plurality of light-emitting chambers each having four square light-emitting chambers arranged in a square lattice, each of which has a discharge hole and an anode located diagonally thereto; electrode chambers that are arranged in series so as to communicate with each other through the discharge holes, form an airtight space together with the light emitting chamber, and house a common electrode that can be preheated to perform discharge with the anode;
A display fluorescent lamp characterized in that the plurality of light emitting chambers are connected to each other at end faces where the distance between adjacent anodes is widest, and the electrode chamber is connected to the light emitting chamber avoiding the anode. 2. The four light emitting chambers are joined in a square shape, and the electrode chamber is
2. The display fluorescent lamp according to claim 1, wherein the cross-sectional shape of the axis is approximately U-shaped. 3. The four light emitting chambers are joined in a square shape, and the electrode chamber is
2. The display fluorescent lamp according to claim 1, wherein the axial cross-sectional shape is approximately H-shaped.