JPH0869257A - Display device - Google Patents

Abstract

PURPOSE: To obviate the deterioration by UV rays of an EL lamp and to prevent blackening by moisture by using a luminous body formed by sealing the EL lamp as the luminous body into a translucent synthetic resin body. CONSTITUTION: An alarm signal 1 consists of a strut 2 and a signal plate 3. This strut 2 is a cylindrical body made of steel. The signal plate 3 is formed by superposing a display plate 31 and an aluminum rear plate and fixing both by an aluminum angle. This display plate 31 is printed with 'STOP' in red on the front surface of the luminous body formed by sealing the EL lamp 4 into the translucent synthetic resin body 5 consisting of a transparent methyl methacryl resin. Further, an aluminum channel is mounted at the rear plate of the aluminum. The signal plate 3 is mounted at the strut 2 by a mounting material 35 mounted at this aluminum channel. The luminous body is thus used as the display plate as it is.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device. In particular, the present invention relates to a display device suitable for outdoor use such as a road sign, a guide board, a store signboard, and an advertising board.

[0002]

2. Description of the Related Art Conventionally, road signs, information boards, store signs,
Most of display devices such as advertising boards are installed outdoors such as on the roadsides, in front of stations, in parks, and in parking lots. There are various types of display devices, but many of them are illuminated by a light source from the front or illuminated on the transparent plate from the back so that they can be seen well at night. Examples of the light source include a fluorescent lamp, a liquid crystal display plate, an electroluminescence lamp (hereinafter referred to as an EL lamp), and the like. Especially the EL lamp is 1m thick
It is used in various display devices because it has a thickness of m or less, is excellent in flexibility, and serves as a uniform surface light source.

The typical EL lamp is Japanese Patent Publication No. 4-2.
As described in Japanese Patent No. 9199, two adhesive package films are attached to both surfaces of a luminescent material in which a luminescent layer is sandwiched between a transparent electrode and an aluminum electrode, and a peripheral portion of the package film is used for U-shaped sealing. It is sandwiched between frames. Further, when the EL lamp is used as a display device, the light emitting layer is deteriorated by ultraviolet rays or blackened by moisture, and therefore, a device for preventing the deterioration or the blackening is used.
Since it is flexible, it is necessary to firmly support it with a metal plate or the like.

For example, in the display device described in Japanese Patent Laid-Open No. 5-72984, an EL lamp is adhered to an aluminum plate, an ultraviolet coating agent is applied on the EL lamp and cured, and a methylmethacryl resin plate is applied thereon. , And the whole is dip-coated with a seal coat agent and hardened, so that it is supported by an aluminum plate or a methylmethacrylate resin plate, and coated with UV coat agents or seal coat agents in multiple layers to prevent ultraviolet rays and moisture. There is.

Further, in the display device described in JP-A-6-83276, a substrate having an EL lamp mounted therein is provided in a box body in which a front plate and a back plate are fixed by a frame material, and this box body is used. The EL lamp is protected from ultraviolet rays, rainwater, dust, etc., and the EL lamp is supported by the substrate. Further, in order to dry the inside of the box, a through hole is provided in the lower surface, and air is allowed to flow in from this through hole.

[0006]

As described above, an EL lamp usually has a structure in which a light emitting substance is sandwiched between package films or the like so as not to come into direct contact with moisture. However, the package films are bonded during long-term use. Moisture and ultraviolet rays will come in from the parts. Therefore, when this EL lamp is used in a display device, it is disclosed in JP-A-5-7298.
As described in JP-A No. 4 and JP-A-6-83276,
Although the EL lamp is protected with a UV coating agent, seal coating agent, etc. or box, it still deteriorates the coating layer during long-term use outdoors, or moisture or UV rays enter from gaps in the box etc. However, there is a problem that the EL lamp is deteriorated or blackened.

Further, when the EL lamp becomes dirty, water or the like cannot be used, so that maintenance work for removing the dirt is difficult. In addition, when used in cold regions, water enters the gaps of the box body, and this water freezes and freezes to enlarge the gaps, and there is a problem that water, moisture, etc. enter from the enlarged gaps. Therefore, an object of the present invention is to provide a display device that protects an EL lamp completely, does not deteriorate the EL lamp by ultraviolet rays, and does not become black due to moisture or water, and is easy to maintain.

[0008]

The present invention has been made to achieve the above object, and the invention according to claim 1 is to provide an electroluminescent lamp (EL lamp) in a translucent synthetic resin body. The light-emitting body sealed in is a display plate. Further, the invention according to claim 2 comprises a light emitting body in which an electroluminescence lamp (EL lamp) is sealed in a translucent synthetic resin body, and a display plate provided in front of the light emitting body. is there. In other words, the invention of claim 1 uses the light emitting body as it is as a display plate, and the invention of claim 2 uses the light emitting body as a light source and a display plate is provided in front of this.

In the light-emitting body used in the inventions of claims 1 and 2, the EL lamp is sealed in the translucent synthetic resin body, but there are various sealing methods. For example,
An EL lamp may be placed in a thermosetting resin such as an uncured epoxy resin and cured to be sealed in a cured resin body, or a monomer such as a methylmethacrylate monomer, a prepolymer, a monomer and a polymer. Mixture with (syrup)
The EL lamp may be placed in an unpolymerized thermoplastic resin such as the above to be polymerized and sealed in the translucent thermoplastic resin body, or the molten thermoplastic resin may be poured around the EL lamp. It is sealed in a translucent thermoplastic resin body (for example, an EL lamp is placed in a mold and fixed, and the melted thermoplastic resin is injected into the mold to form a translucent thermoplastic resin. (Sealed inside).

In particular, a light emitting body in which an EL lamp is sealed in a translucent thermoplastic resin body as in the third aspect of the invention is preferable because it can be easily manufactured and is inexpensive. That is, the invention of claim 3 is the display device according to claim 1, wherein the translucent synthetic resin body is a translucent thermoplastic resin body. As the translucent thermoplastic resin used in the invention of claim 3, a methylmethacryl resin or a polycarbonate resin is suitable.

In the present invention, the translucent synthetic resin body may be any as long as it transmits light. For example, it may be colorless and transparent, or colored and transparent, or may be made semitransparent by adding powder or the like to this transparent synthetic resin body. Alternatively, the surface may be provided with fine irregularities so as to cause irregular reflection. In addition, in this translucent synthetic resin body, E
The light-emitting body that encapsulates the L lamp may have any shape. For example, it may have a disc shape, a polygonal plate-like body such as a triangle or a quadrangle, or an appropriate shape such as a sphere.

[0012]

The luminous body used in the display device of the present invention is an EL lamp sealed in a translucent synthetic resin body. This translucent synthetic resin body is difficult to transmit ultraviolet rays, has good water resistance, and is excellent in water impermeability and moisture impermeability. Moreover, when it is sealed with this translucent synthetic resin body, it is adhered to the EL lamp more closely and is thicker than the conventional film or adhesive, so that ultraviolet rays, moisture and water do not reach the EL lamp. Moisture does not enter from gaps. Therefore, the luminous body is not deteriorated by the ultraviolet ray and is not blackened by the moisture.

The luminescent material used in the present invention is thus E
Since it is only necessary to seal the L lamp, mass production is easier by covering with a film or dipping as in the conventional case. In addition, because the light-emitting body is an EL lamp sealed in a translucent synthetic resin body, it has excellent water resistance and moisture resistance.
Maintenance work is easy as dirt can be wiped off with water.

In the display device of the present invention, as in the first aspect of the invention, a light emitting body in which an EL lamp is sealed in a translucent synthetic resin body is used as a display plate, or in the second aspect, the light emitting body is used. Since the display plate is provided in front of the display device, the brightness of the display device does not decrease, maintenance is easy, and the display device can be used for a long time. or,
When the luminous body is used as a display plate as in claim 1, since there is no diffuse reflection between layers as compared with a case where a film is covered with many layers, there is almost no loss of light emitted from the luminous body, and extremely light is emitted. It becomes an efficient display board.

According to the third aspect of the present invention, when the translucent synthetic resin body is made into the translucent thermoplastic resin body, the EL lamp is put into a mold and the molten thermoplastic resin is put into this mold. By injecting it inside or putting an EL lamp in an unpolymerized thermoplastic resin and polymerizing it, it is possible to easily manufacture and become inexpensive.

[0016]

Next, embodiments of the present invention will be described. 1 to 5 show an embodiment in which the display device of the present invention is applied to a warning sign. FIG. 1 shows a main part of the warning sign, (a) is a front view, (b) is a side view, and FIG. 2 is a rear view of the display plate, FIG. 3 is an enlarged cross-sectional view taken along the line AA of FIG. 1, FIG. 4 is an explanatory view showing a light emitting body, and FIG. 5 is an explanatory view showing an EL lamp. Figure 6
FIG. 7 shows another embodiment of the display device of the present invention, (a) is a perspective view showing a main part of the display device, and (b) is a side view showing only the display plate portion of (a).

1 to 5, reference numeral 1 is a warning sign, which is composed of a support 2 and a sign plate 3. The pillar 2 is a steel cylindrical body. The marker plate 3 is, as shown in FIGS. 2 and 3,
The display plate 31 and the aluminum back plate 32 are overlapped,
Both of them are fixed by an aluminum angle 33.

The display plate 31 is obtained by printing "Stop" in red on the surface of a light emitting body in which the EL lamp 4 is sealed in a translucent synthetic resin body 5 made of transparent methyl methacrylic resin. An aluminum channel 34 is attached to the aluminum back plate 32, as shown in FIG. Then, as shown in FIG. 1, the marker plate 3 is attached to the support column 2 with an attachment member 35 attached to the aluminum channel 34. Reference numeral 6 denotes a cable, which leads from the EL lamp to the power source through the support column 2.

As shown in FIG. 5, the EL lamp 4 has a moisture absorbing layer 41, a transparent electrode 42, a light emitting layer 43, and a back electrode 44 covered with a package film 45. And
As shown in FIG. 4, the EL lamp 4 is sealed in a translucent synthetic resin body 5 made of methylmethacryl resin, and a conducting wire 46 connected to the transparent electrode 42 and the back electrode 44 is translucent synthetic. It is drawn out of the resin body 5. This lead wire 4
When 6 is connected to the cable 6 and a voltage is applied between the transparent electrode 42 and the back electrode 44, the light emitting layer 43 emits light.

Next, a method of manufacturing and using the warning sign 1 will be described. The EL lamp 4 to which the lead wire is attached is mounted in a mold, and the melted methyl methacrylic resin is injected into the mold to manufacture a triangular transparent methyl methacrylic resin plate encapsulating the EL lamp 4, The display plate 31 was manufactured by printing "Stop" on this. The display plate 31 and the aluminum back plate 32 to which the aluminum channel 34 was attached were overlapped with each other and fixed with the aluminum angle 33 to manufacture the sign plate 3 shown in FIG.

When the sign board 3 is attached to the support column 2 with the mounting member 35, the conductor 46 extending from the EL lamp 4 is connected to the cable 6 passing through the support column 2, and the cable 6 is connected to the power source. The warning sign 1 shown in FIG. 1 is completed.
When this pole 2 is set up in a dangerous place and it gets dark,
C200V is passed through a breaker and energized. Then
The light emitted from the EL lamp gives a good indication of "stop". Further, even after long-term use, the EL lamp 4 will not be deteriorated by ultraviolet rays and will not be blackened by moisture or water, and will shine bright forever.

In this embodiment, the display contents are directly printed on the light emitter to form the display plate 31, but a transparent plate on which the display contents are printed may be attached to the front surface of the light emitter to form the display plate. Further, in this embodiment, the display board 3 printed with "Stop"
Although No. 1 is used, other guide signs and warning signs may be printed and used.

Further, although AC200V was used as a power source after passing through the breaker, the use of a commercial power source in this way allows the lighting by a simple device, which shortens the construction time and is convenient. In addition, a solar cell + storage battery + inverter or a commercial power source + inverter can be used as this power source. If a solar cell is used, it can be used in a mountainous area where there is no commercial power source, and if a commercial power source and an inverter are used in combination, it is easy to change the brightness of the EL lamp or make it flash and light.

Next, the embodiment shown in FIG. 6 will be described. In FIG. 6, reference numeral 1a denotes a display device, which includes a pillar 2a, a sign board 3a, a solar battery 7, a storage battery 8, and a controller 9.
Consists of The pillar 2a is a cylindrical body made of steel. Signboard 3
As for a, the display plate 31a and the aluminum back plate 32a are superposed, and both are fixed by the aluminum angle 33a, which is the same as the embodiment shown in FIGS.
The sign plate 3a is attached to the support column 2a with a mounting member 35a. The display plate 31a is made of a light emitting body in which the EL lamp 4a is sealed in a translucent synthetic resin body 5a made of fluorescent yellow transparent methyl methacrylic resin.

Reference numeral 6a denotes a cable, which is connected to the storage battery 8 from the EL lamp 4a through the support column 2a. 7
Is a solar cell, and the electricity generated by the solar cell 7 is stored in the storage battery 8. Reference numeral 9 denotes a controller, which is provided with a sensor inside, and stores electricity generated by the solar battery 7 in the storage battery 8 while it is bright, and energizes the EL lamp 4a with electricity stored in the storage battery 8 when it becomes dark. ing. Reference numeral 91 is a box containing the storage battery 8 and the controller 9, and the solar cell 7 is attached to the upper surface of the box 91.

Next, a method of manufacturing and using the display device 1a will be described. A mixture (syrup) of methyl methacryl monomer and methyl methacryl polymer, a polymerization catalyst (dicumyl peroxide), a yellow pigment and a fluorescent pigment are uniformly mixed, and the mixture is put between two glass plates, and the EL lamp 4a is placed therein. Hang and polymerize. Then, the EL lamp 4a is placed in the transparent methyl methacrylic resin.
Is sealed. This was taken out from between the glass plates to obtain a light-emitting body, and this light-emitting body was formed into a circular shape to manufacture the surface plate 31a. The surface plate 31a and the aluminum back plate 32a are polymerized and fixed at an angle 33a to manufacture the marker plate 3a.

On the other hand, a box 91 is mounted on the support column 2a, a storage battery 8 and a controller 9 are mounted therein, and a solar cell 7 is mounted on the upper surface and wiring is performed appropriately. The marker plate 3a is attached to the column 2a with the attachment material 35a, the conductor wire from the EL lamp 4a is connected to the cable 6a passing through the column 2a, and the cable 6a is connected to the controller 9. The column 2a is set up in a dangerous place. Then, when it becomes dark, the controller 9 judges and the electricity from the storage battery 8 causes the EL lamp 4a to blink and emit light,
Notify you of a hazardous area. When it is bright, the controller 9 judges and charges the storage battery 7 with electricity generated by the solar battery 7.

However, even if it is used for a long period of time, EL
The lamp 4a does not deteriorate due to ultraviolet rays and does not become black due to moisture or water, and shines brightly forever. In this way, if the phosphor is mixed in the light emitting body, not only the brightness of the light emitting body is not lowered, but also the increasing effect is obtained. In this embodiment, the display plate 31 in which the light emitting body itself shines yellow is used, but this light emitting body may be made colorless and transparent, and a yellow transparent plate may be attached to the front surface to form a display plate.

[0029]

As described above in detail, in the display device of the present invention, the EL lamp is not deteriorated by ultraviolet rays because the EL lamp is used as the light emitting body in which the EL lamp is sealed in the translucent synthetic resin body. However, it does not turn black due to humidity.
In addition, this light-emitting body seals the EL lamp in a translucent synthetic resin body to prevent ultraviolet rays, moisture, and water from reaching the EL lamp. It is convenient because it does not need to be protected or protected by various methods such as applying an ultraviolet coating agent, and maintenance is simple.
Further, since the box and the ultraviolet coating agent are not used, the cost is low.

Further, since the EL lamp uses a light-emitting body in which a translucent synthetic resin body is sealed, the EL lamp is light in weight, the manufacturing design of the display device is easy, and the weight of the product is reduced. Cost reduction, etc. will increase product competitiveness. Moreover, since the light emitting body is simply sealed in the translucent synthetic resin body of the EL lamp, it becomes easy to mass-produce and the cost becomes low.

Since the display device of the present invention does not cause frost damage or the like, it can be used in cold regions. Normally, an AC voltage such as 100 V-400 Hz is used as the voltage used for the EL lamp, and therefore, it is necessary to precisely insulate the periphery of the EL lamp, but the present invention is safe because the EL lamp is sealed.

However, when the luminous body is used as the display plate as in the first aspect, the loss of light is reduced and the surface becomes bright. Further, when the translucent thermoplastic resin body is used as the translucent synthetic resin body as in claim 3, the light emitting body can be easily manufactured and the cost is reduced.

[Brief description of drawings]

FIG. 1 shows an embodiment in which a display device of the present invention is applied to a warning sign, (a) is a front view showing a main part of the warning sign, and (b) is a side view.

2 is a rear view of the warning sign display plate of FIG. 1. FIG.

FIG. 3 is an enlarged cross-sectional view taken along the line AA of FIG.

FIG. 4 is an explanatory diagram showing a light emitting body.

FIG. 5 is an explanatory diagram showing an EL lamp.

FIG. 6 shows another embodiment of the display device of the present invention,
(A) is a perspective view showing a main part of the display device, and (B) is a side view showing only the display plate portion of (A).

[Explanation of symbols]

 1, 1a Display device (warning sign) 2, 2a Support post 3, 3a Sign plate 31, 31a Display plate 4, 4a EL lamp 5, 5a Translucent synthetic resin body

Claims (3)

[Claims] 1. An electroluminescence lamp (EL
A display device comprising a light-emitting body in which a lamp is sealed in a translucent synthetic resin body as a display plate. 2. An electroluminescence lamp (EL
Lamp) in a translucent synthetic resin body,
A display device comprising a display plate provided in front of the light emitting body. 3. The display device according to claim 1, wherein the translucent synthetic resin body is a translucent thermoplastic resin body.