JPH04141948A - Display device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a display device suitable for large-scale electronic display boards installed outdoors such as athletic stadiums and baseball stadiums, and particularly relates to The present invention relates to a display device with an improved partition member for a large number of display fluorescent lamps incorporated as a display device.

(Prior Art) Conventionally, this type of display device has been equipped with a large number of conventional display fluorescent lamps 1 shown in FIGS. direction) and are assembled.

The display device forms characters, figures, symbols, etc., and displays necessary information by appropriately controlling the turning on and off of these many display fluorescent lamps 1.

The display fluorescent lamp 1 is a single tube that emits monochrome or multicolor light, and as shown in FIG. The upper cylinders 4 are concentrically connected, and a cross-shaped partition plate 5 is installed inside the upper cylinder 4.
It is partitioned into four light emitting chambers 6a, 6b, 6c, and 6d almost equally.

For example, a phosphor film that emits red (R), green (G), blue (B), etc. is coated on each inner surface of the upper tube 4 and each side of the partition plate 5 for each light emitting chamber 6a to 6d. and each light emitting chamber 6a
-6d are the cathode 2 and anodes 7a and 7b, respectively, which perform selective discharge.

It has built-in 7c and 7d.

As shown in FIG. 8, a pair of left and right holes projecting inward from each of the light emitting chambers 6a to 6d are located on both left and right sides of the discharge hole 8 bored in the center of the bottom of the upper tube 4. baffle plate 9a,
9b is integrally provided on the partition plate 5 in a protruding manner.

These baffle plates 9a, 9b are connected from the discharge hole 8 to the anode 7a~
The baffle plates 9a and 9b block the discharge that is about to go straight towards 7d.
By curving the discharge path, the length of the discharge path is increased and the brightness is increased.

The light emitted from each of the light emitting chambers 6a to 6d passes through a display plate 10 forming a display surface and is output to the outside.

(Problem to be Solved by the Invention) However, in such a conventional display fluorescent lamp 1, the light distribution in the vertical direction (vertical direction) and the light distribution in the horizontal direction (horizontal direction) in FIG. Therefore, when a large number of display fluorescent lamps 1 are assembled into a display device, the following problem occurs.

In other words, in large display devices installed outdoors such as in baseball stadiums, they are generally viewed from a fairly large angle from the left and right (horizontal), but the viewing angle from the top and bottom (vertical) is very small. . For example, the visibility angle in the left and right direction is approximately 5
While the coal grade is 0 to 60, the coal grade in the vertical direction is only about 10 to 15.

Therefore, while increasing the light distribution in the horizontal direction for the display fluorescent lamp 1, the light distribution in the vertical direction must be determined by considering the surrounding environment such as light leakage at night to general houses around the display device. , it is desirable to reduce it.

Therefore, this invention was made in consideration of such circumstances, and its purpose is to provide a display device that can increase the light distribution in the left-right direction (horizontal direction) and improve visibility. .

[Structure of the invention]

(Means for Solving the Problems) The present invention has been made by focusing on a light control function for controlling light emission of a partition member between a display and a fluorescent lamp, and is constructed as follows.

In other words, the present invention includes a display plate that forms a display surface, a phosphor film adhered body that gradually expands toward the display plate and has a phosphor film coated on its inner surface, and the display plate and the phosphor film. In a display device in which display fluorescent lamps each having a partition member that partitions a light-emitting chamber formed by a film adherend into a plurality of light-emitting cells and has a phosphor film coated on the side surface thereof are arranged vertically and horizontally, the above-mentioned A side surface of a vertical member of the partition member of the display fluorescent lamp, which extends at least in the longitudinal direction of the display fluorescent lamp arrangement direction, is formed into a tapered surface that gradually widens in a direction opposite to the display plate. It is characterized by

(Function) The partitioning member of the display fluorescent lamp has a tapered side surface of its vertical member and is coated with a phosphor film.
When viewing a display device equipped with this display fluorescent lamp from the left and right directions (horizontal direction), the viewing area increases by the amount of viewing the tapered surface of this partition member. While the light distribution in the horizontal direction can be increased by the amount of light emitted, the light distribution in the vertical direction is decreased.

Therefore, according to the present invention, visibility in the left-right direction (horizontal direction) can be improved, while light leakage to the periphery of the display device can be reduced by reducing light distribution in the up-down direction (vertical direction). This can help protect the environment.

(Example) Hereinafter, an example of the present invention will be described based on FIGS. 1 to 7.

FIG. 3 is an external perspective view of a display fluorescent lamp L incorporated in an embodiment of the present invention. Figure 4 is a view from the ■ arrow in Figure 3.
FIG. 5 is an exploded perspective view of this display fluorescent lamp L.

In these figures, a plurality of fluorescent lamps L are assembled into a module, for example, in two rows (stages) and eight columns (2×8), and a plurality of these modules are further assembled vertically and horizontally. organized into units. A plurality of these units are then assembled and arranged in rows and columns in the display device.

The display device displays necessary information by forming characters, figures, symbols, etc. by appropriately controlling the turning on and off of a large number of fluorescent lamps L arranged vertically and horizontally.

The display fluorescent lamp L is placed in the left and right direction (horizontal direction) of the display device.
It is configured to increase the light distribution in the vertical direction while decreasing the light distribution in the vertical direction, and is configured as follows.

That is, in the fluorescent lamp L, the envelope 20 is formed into a bottomed cylindrical shape by drawing a thin metal plate such as stainless steel or iron, and one end in the axial direction (the upper end in FIG. 5) is opened. There is.

As shown in FIGS. 5 and 6, this open end is sequentially widened into a rectangular tube shape in two stages, thereby forming an upper step 20a and a lower step 20b, each having a rectangular planar shape, for example. .

The entire inner peripheral surface from the lower end of the lower step portion 20b to the lower bottom of the envelope 20 is coated with a glass film (not shown), so that when electrical discharge occurs within the envelope 20, metal The glass coating prevents the internal impurity gas from being released from the envelope 20 made of aluminum, and increases the strength against external pressure.

Further, the center hole 20c at the bottom of the envelope 20 is sealed with a glass disc-shaped button stem 21, and the exhaust pipe 23
protrudes outward through the center hole 20c.

A common electrode cathode 22, which is one of a pair of discharge electrodes, is erected on this button stem 21.
The tip ends of a pair of lead wires 22a and 22b supporting both ends of the button stem 21 penetrate in the thickness direction of the button stem 21 and are electrically connected to a lighting circuit (not shown).

An inner casing 24, which is a part of the fluorescent film adherend, is inserted into the upper part of the envelope 20 and fixed therein, and a cross-shaped partition plate 25 is fitted coaxially into the tapered tube 24. , As shown in FIGS. 3 and 4, the inside of the tapered cylinder 24 includes, for example, four light-emitting chambers 26a, 26b, 26c, which are rectangular in plan view.
It is divided into approximately equal parts into 26d.

For example, as shown in FIG. 2, green (G), blue ( B), green (G), and red (R), respectively, are covered with fluorescent films 27 that emit light. Incidentally, the arrangement (rotation) of the luminescent colors (R, G, B) of the fluorescent film 27 shown in FIG. 3 is optimal in terms of chromaticity.

The tapered cylinder 24 has an upper part in FIGS. 2 and 5 shaped like a truncated quadrangular pyramid tapering downward, and a lower part in the drawings is integrally connected to a small cylindrical shape, and the bottom of the small cylindrical lower part Circular discharge holes 24a to 24d are opened in each of the light emitting chambers 26a to 26d.

As shown in FIG. 4, the partition plate 25 is constructed by assembling vertical bars 25a, which are vertical members extending in the vertical direction in the figure, and horizontal bars 25b, which extend in the horizontal direction in the figure, in a cross shape.

The vertical bars 25a coincide in the vertical direction when the fluorescent lamps L are arranged and installed in a display device (not shown) vertically and horizontally,
The horizontal bars 25b coincide in the horizontal direction.

Further, as shown in FIGS. 1 to 6, the vertical beam 25a has a tapered surface 25t that gradually widens on both left and right sides in the drawings toward the opposite side of the display plate 30, for example, toward the cathode 22 side.
They are formed respectively.

These tapered surfaces 25t are also provided on the inner surface facing each of the light emitting chambers 26a to 26d, as described above.
It is coated with a phosphor film that emits light in the same color as the light emitted by.

Note that this tapered surface 25t may be formed by a curved surface such as a paraboloid.

An anode 28 is provided in each of the light emitting chambers 26a to 26d.
A to 28d are arranged respectively.

Each lower end of each anode 28a to 28d is connected to each lead wire 29, and the tip of each lead wire 29 passes through the bottom of the lower step 20b of the envelope 20 in the vertical direction in an airtight manner and extends to the outside. , and is electrically connected to a lighting circuit (not shown).

Next, the light-transmitting plate 30 made of transparent plate glass is fitted into the upper step 2Oa of the envelope 20, and the light-transmitting plate 30
The inner surface of the partition plate 30 is brought into contact with the upper end of the partition plate 25 and fixed to the upper step part 20a by, for example, frit glass, and this transparent plate 30 is used as a display surface of the fluorescent lamp.

As a result, the envelope 20 is airtightly sealed, so that the air in the envelope 20 is exhausted through the exhaust pipe 23, and after the exhaust, mercury and rare gas are sealed.

Therefore, according to this embodiment, since both left and right side surfaces of the vertical member 25a of the partition plate 25 are formed into tapered surfaces 25t,
1 and 4, when the fluorescent lamp L is viewed at a required angle from the left and right directions in the figures with respect to the center 0 of the display plate 30, the area where the tapered surface 25t can be viewed increases. While the light distribution in the horizontal direction increases, the light distribution in the vertical direction in the figure decreases.

Therefore, when we conducted an experiment to compare the light distribution characteristics of the fluorescent lamp L of this example with the light distribution characteristics of the conventional fluorescent lamp shown in FIGS. 8 and 9, we obtained the data shown in FIG. Ta.

In other words, as shown in FIG. 7, the brightness in the horizontal direction of this embodiment shown by curve A in the figure is brighter than the brightness in the horizontal and vertical directions of the conventional display fluorescent lamp 1 shown by curve B. While the brightness is increased, the brightness in the vertical direction of this embodiment, shown by curve C in the figure, is decreased.

This is because the light distribution in the upper and lower directions is distributed in the horizontal direction by the tapered surface 25t of the partition plate 25.

Therefore, by incorporating a large number of fluorescent lamps L configured in this manner into a display device, it is possible to increase the light distribution in the horizontal direction of the display device and improve visibility, while reducing the light distribution in the vertical direction. Therefore, light leakage around the display device can be reduced.

〔Effect of the invention〕

As explained above, the present invention improves the light distribution in the left-right direction (horizontal direction) by forming the side surfaces of the vertical members of the partition members of the fluorescent lamps into tapered surfaces in a plurality of fluorescent lamps incorporated in a display device. while increasing the vertical direction (
Since the structure is configured to reduce light distribution in the vertical direction, visibility of the display device in the left and right directions can be improved, while
Environmental protection can be achieved by reducing glare around the display device.

[Brief explanation of the drawing]

FIG. 1 is a plan view of essential parts of an embodiment of a display device according to the present invention, FIG. 2 is a diagram including a cross section taken along the line ■-■ in FIG. 1, and FIG. 3 includes the essential parts shown in FIG. 1. External perspective view of fluorescent lamp, No. 4
The figure is a view in the direction of the ■ arrow in Fig. 3, Fig. 5 is an exploded perspective view of the fluorescent lamp shown in Fig. 3, Fig. 6 is a sectional view taken along the line VI-VI in Fig. 4, and Fig. 7 is a view from Fig. 1 to Fig. 6 is a graph showing the light distribution characteristics of the embodiment shown in comparison with that of a conventional example, Fig. 8 is a plan view of a conventional display fluorescent lamp, and Fig. 9 is a cross section taken along line IX-IX in Fig. 8. It is a diagram. L...Fluorescent lamp for display, 2o...Envelope, 24
... Tapered cylinder (phosphor film adherend), 25 ... Partition plate (partition member), 25a ... Vertical beam (vertical member L25d ...
・Tapered surface, 30...display plate. Applicant's agent Hisashi Hatano No. 2m 5F No. 3 Seki No. 4m No. 511 @ Figure 6 H stone body published force direction angle (9) No. 7B Rattan 8R Figure 9 Procedural amendment blind (voluntary) November 1990 month 14

Claims (1)

[Claims] A display plate forming a display surface, a phosphor film adherend that gradually expands toward the display plate and has a phosphor film coated on its inner surface, and the display plate and the phosphor film adherend. In a display device in which fluorescent display lamps are arranged vertically and horizontally, each of which has a partition member that partitions a light-emitting chamber formed by A display device characterized in that a side surface of a vertical member of the partition member that extends at least in the vertical direction of the arrangement direction of the display fluorescent lamps is formed into a tapered surface that gradually widens in a direction opposite to the display plate.