JPS6035165Y2 - fluorescent display device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a multi-row, double-row fluorescent display device in which a plurality of fluorescent display sections are arranged in the row and column directions within an envelope.

Recently, electronic desktop calculators, cash registers, and other electronic control devices have become more multifunctional, and accordingly, fluorescent display devices are required to increase their display capacity. It's coming.

For this reason, multi-digit fluorescent display devices have been put into practical use as fluorescent display devices in which a plurality of display sections are arranged in one direction within one envelope to increase the amount of display.

However, this multi-digit fluorescent display device has the disadvantage that the length in one direction increases depending on the number of digits, and therefore the number of digits cannot be increased for small devices.

In response to this, a display device in which a plurality of fluorescent display portions are arranged in a matrix in the row and column directions within one envelope to increase the display amount has been developed and put into practical use.

According to this fluorescent display device, by appropriately determining the number of lines and the number of digits, the external dimensions of the fluorescent display device can be adapted to the shape of the equipment used.

It also has many advantages, such as being able to display many different types of display by varying the display content between lines.

By the way, in this type of fluorescent display device, a transparent member usually made of glass is used for the front plate constituting the planar envelope so that the light emitted within the envelope can be observed from the outside. Moreover, in order to effectively emit fluorescent light, the inside of the envelope is maintained in a high vacuum atmosphere.

Therefore, when configuring a fluorescent display device in which display parts are arranged in a matrix as described above, as the number of display parts increases, the space for storing the display parts in the envelope becomes larger. , it is necessary to have a structure that can sufficiently withstand external pressure.

For this reason, the pressure resistance of the envelope of this type of display device has conventionally been improved by increasing the thickness of the constituent members of the envelope.

However, as the thickness of the constituent members of the envelope increases, the envelope itself becomes heavier and larger.

Additionally, thicker glass plates used for front panels, etc., become more susceptible to thermal shock, leading to more damage during the manufacturing process. This required consideration and required a lot of work time, leading to an increase in manufacturing costs.

Furthermore, in a fluorescent display device having fluorescent display parts arranged in a matrix, electrons emitted from the filament tend to fly to display parts in adjacent rows that are not lit, causing leakage light. There was a problem.

Therefore, the present invention was made in view of the above-mentioned circumstances.
Increasing the thickness of the constituent members of the envelope by providing a support plate between the rows (or between the rows) that reinforces the planar envelope against external pressure and is continuous across substantially the entire width. We aim to improve workability and reduce costs in the manufacturing process by creating a multi-row fluorescent display device that is lightweight and has sufficient pressure resistance against external pressure, and that does not cause leakage of light. It is intended to provide.

Hereinafter, an embodiment of a fluorescent display device according to the present invention will be described with reference to the drawings.

FIG. 1a is a plan view showing an embodiment of a fluorescent display device according to the present invention, and the same figure is a cut end view taken along the line B--B.

Here, 1 is a substrate made of an insulating material such as ceramics or glass, and 2 is a front valve formed by heating and forming a glass plate into, for example, a container shape, and integrally forming a front plate part 2a and a side wall plate part 2b. By sealing this front valve 2 to the substrate 1 at its peripheral edge, a planar envelope 3 is constructed.

Furthermore, 4 is a pattern display section arranged in a matrix in the row and column directions within the envelope 3, and this pattern display section 4 is formed by forming a phosphor layer on the segment anode. It is something that has been done.

Further, 5 is a control electrode provided close to above the pattern display section 4, 6 is a filament cathode, and 7 is a control electrode that is led out by passing through the sealed part between the substrate 1 and the front bulb 2 in an airtight manner. These are external terminals for each electrode.

Furthermore, 8 is interposed between the opposing inner surfaces of the substrate 1 and the front plate portion 2a of the front valve 2 over substantially the entire width between each row of the pattern display section 4, and is arranged between the outer walls against external pressure. This is a support plate provided to support the vessel 3 from the inside.

This support plate 8 is made of a glass plate similar to the front bulb 2, for example, and this glass plate is used as the support plate 8 for the front bulb 2.
It is cut into a width that is approximately the same as the depth, placed on an adhesive made of glass frit applied to a predetermined position on the inner surface of the front plate portion 2a of the front bulb 2, and assembled by firing.

In this case, if an opaque coloring pigment is mixed into the adhesive, the coloring pigment will block the unsightly adhesive area that would spoil the appearance after baking, and also make the lines between lines clearer. Display effects occur.

Therefore, the envelope 3 is supported from inside by the support plate 8 in addition to the side wall plate portion 2b of the front valve 2, so that when the inside of the envelope 3 is maintained in a high vacuum state, Even in the middle of the day, its pressure resistance against external pressure is greatly improved.

Therefore, even if the thickness of the substrate 1 or the front valve 2 is made as thin as that of a conventional multi-layer display device, the envelope 3 can obtain sufficient pressure resistance due to the action of the support plate 8. Therefore, the envelope itself can be made lighter or smaller.

Furthermore, the substrate 1 and the front valve 3 at the time of manufacturing
This makes it easier to handle, improves work efficiency, and reduces the risk of damage due to thermal shock during sealing and exhaust work, improving product yield and reducing costs. be.

Furthermore, by providing the support plate 8 between the rows of the pattern display sections 4 as described above, there is an effect that leakage light emission between the rows of each pattern display section 4 is reliably prevented.

That is, when driving this type of fluorescent display device, any one of the pattern display section 4, control electrode 5, and filament cathode 6 is connected in common to all
The other two are commonly connected for each row and column.

Thus, a so-called dynamic drive method is adopted in which the pattern display sections located at the intersections of the rows and columns are sequentially and selectively emitted by applying a drive signal to each of them.

In this case, for example, all the corresponding segments of the pattern display section 4 are connected in common, the control electrodes 5 are provided independently for each column, and the filament cathodes 6 are provided independently for each row to achieve dynamic drive. It may be done.

According to this driving method, in the rows above and below the row in which the currently selected pattern display section 4 is included, the pattern display section 4 in the same column as the selected pattern display section 4 is also There is a risk that electrons from the filament cathode 6 will collide and cause leakage light emission.

However, according to the above-described fluorescent display device of the present invention, since the support plate 8 is present between each row, the electrons emitted from the filament cathodes 6 of other columns are blocked by the support plate 8. As a result, it is possible to reliably prevent leakage of light between lines, resulting in excellent effects such as high reliability and high quality display.

By the way, in the embodiment shown in FIGS. 1a and 1b described above, the support plate 8
Although an example is shown in which the support plate 8 is adhesively fixed to the inner surface of the front valve 2, the support plate 8 is attached to at least one surface of the inner surface of the front plate 2a of the front valve 2 and a predetermined position on the upper surface of the substrate 1, or both surfaces. It would be good if it could be fixed with adhesive.

In this case, the end surface of the support plate 8 on the side that is not bonded does not need to be in close contact with the opposing surface, as long as the structure is such that the front valve 2 is supported with respect to the substrate 1.

Further, the end surface portion of the support plate 8 on the side where it is glued is
As long as the support plate 8 is fixed and has a supporting structure, it does not necessarily have to be bonded over its entire end surface.

Further, as the material of the support plate 8, in addition to glass, inorganic insulating materials such as ceramics, metal pieces, composite materials thereof, etc. may be used.

Furthermore, in the embodiment shown in FIGS. 1a and 1b described above, a glass plate is heated and formed into a container shape to form the front plate portion 2a.
Although an example is shown in which the envelope 3 is constructed using the front valve 2 in which the front valve 2 and the side wall plate portion 2b are integrally formed, the front valve 2 is limited to the container-shaped one described above. For example, a front valve 11 as shown in FIG. 2 may be used without this.

That is, a side wall plate part 11b obtained by cutting a glass plate into a rectangular shape in the same manner as the front plate part 11a is attached to the peripheral part of the front plate part 11a made of a flat glass plate, and an adhesive made of glass frit is attached to the side wall plate part 11b obtained by cutting a glass plate into a rectangular shape in the same way as the front plate part 11a. It is also possible to use a front valve 11 that has been bonded and fired.

When such a front valve 11 is used, the support plate 8 may be assembled at the same time as the side wall plate part 11b is assembled on the front plate part 11a.

In this case, the longitudinal end portion of the support plate 8 and the side wall plate portion 11
If a gap 11c is provided between the front valve 11 and the substrate 1, the exhaust operation performed after sealing the front valve 11 to the substrate 1 becomes extremely easy.

Further, in the above embodiment, the support plate 8 is provided between the rows of the pattern display sections 4 arranged in a matrix, but when the filament cathodes 6 are stretched in the column direction, Alternatively, the support plate 8 may be provided between the rows of the pattern display section 4.

In addition, the present invention is not limited to the embodiments described above and shown in the drawings, but can be implemented with various modifications without changing the gist thereof.

As described above, in the fluorescent display device of the present invention, between the rows (or between columns) of a plurality of pattern display sections arranged in the row and column directions within one planar envelope, Since a support plate is provided to support the space between the substrate of the envelope and the front plate, the pressure resistance of the envelope against external pressure is greatly improved.

Therefore, the thickness of each component constituting the envelope can be reduced, and even when a large number of pattern display sections are provided, it is possible to prevent the envelope from increasing in weight or size.

Furthermore, by being able to make the components of the envelope thinner, it not only improves workability in each manufacturing process, but also has the advantage of being resistant to thermal shock, etc., and improving product yield. This makes it possible to reduce costs.

In addition, the fluorescent display device according to the present invention can reliably prevent leakage of light due to the shielding effect of the support plate provided between the rows (or columns) of the pattern display section, so it is also effective in terms of display performance. The effect obtained is extremely large.

[Brief explanation of the drawing]

1A and 1B are a plan view and a cut end view taken along line B-B showing an embodiment of the fluorescent display device according to the present invention, and FIG. 2 is a diagram showing another embodiment of the fluorescent display device according to the present invention. FIG. 1... Board, 2... Front valve,
3...Envelope, 4...Pattern display section, 8...
Bend/Support Board.

Claims (1)

[Scope of utility model registration request] An envelope having a flat plate shape and vacuum-tight interior formed by sealing a front valve on a substrate, and a plurality of displays disposed on the substrate in the row direction and column direction within the envelope. in the row direction (or column direction) at the upper position of the display section,
A fluorescent display device comprising: a display section configured of a plurality of anodes having a phosphor layer that emits light by the bombardment of thermoelectrons from a stretched filament cathode; Between the opposing inner surfaces of the substrate and the front valve between the rows (or between columns) of the
1. A fluorescent display device characterized by interposing a support plate having a substantially continuous shape in the column direction).