JPH0638394Y2 - EL display device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a display device using an electroluminescence element (hereinafter abbreviated as EL element).

Background Art Fluorescent lamps, incandescent lamps, etc., and so-called neon signs, etc. are used in advertising towers and signboards that have been widely used in the past. In such a prior art, there is a problem that the power consumption is large and the size becomes large.

In order to solve such a problem, it is possible to use an EL element. The EL element is configured by sandwiching an EL light emitting body with a pair of electrodes, the electrode on the light emitting region side is transparent, and these are airtightly covered with an outer sealing material. In such an EL element, the EL light-emitting body is easily deteriorated by moisture, and accordingly, particularly in advertising towers and signboards used outdoors, special measures must be taken to prevent moisture. Moreover, the airtightness is likely to be impaired near the terminal structure for supplying power to the EL element.

Problems to be Solved by the Invention An object of the present invention is to provide an EL display device capable of surely achieving the airtightness of the EL element and hence the moistureproof effect.

MEANS TO SOLVE THE PROBLEMS The present invention electrically connects an EL element to an electrode provided along a self-supporting substrate, and covers the whole of these with an outer sealing material in an airtight manner and connected to the electrode. The terminal piece penetrates the base body and projects outward, and the outer sealing material near the terminal piece has a mounting hole formed by exposing the base body. The terminal piece and the base body exposed from the mounting hole are filled. EL characterized by being covered with a material
It is a display device.

According to the present invention, the self-supporting base body provided with the electrodes and the EL element are entirely airtightly covered with the outer sealing material, and the terminal piece connected to the electrode penetrates the base body to the outside. Projecting towards
Since the terminal piece and the base body exposed from the mounting hole formed in the outer sealing material are covered with a filling material such as synthetic resin, the airtightness is improved and the moisture-proof function is reliably achieved. To be done. Moreover, even if an external force acts on the filling material, the filling material covers not only the terminal piece but also the portion exposed from the mounting hole of the base body, and thus adheres closely, so that the external force does not act on the filling material. Even if it works, it is possible to prevent a large external force from being applied to the terminal piece, and it is possible to prevent the terminal from coming off the base body and being damaged. Since the substrate is self-supporting, the EL device can be kept flat.

Embodiment FIG. 1 is an exploded perspective view of an embodiment of the present invention, and FIG. 2 is a partial sectional view thereof. The substrate 1 made of a self-supporting film or plate is made of a material such as Bakelite. On one surface of the base 1, the adhesive 2
Then, a pair of parallel electrodes 3 and 4 are attached to the positions shown by virtual lines 3a and 4a in FIG. The electrodes 3 and 4 are made of metal,
For example, it is made of copper or the like and has a foil shape. Mounting holes 7, 8 for the terminal pieces 5, 6 are formed in the base body 1.

FIG. 3 is a sectional view near the mounting hole 7. The mounting hole 7 formed in the base 1 has a conical recessed portion, and the conical truncated head 10 of the terminal piece 5 is fitted into this mounting hole 7. A shaft portion 11 having a male screw is connected to the head portion 10. The shaft portion 11 is inserted through the mounting hole 7, penetrates the base body 1, projects on the other surface (the lower surface in FIG. 3), and is screwed into the nut 12. The electrode 3 is pinched between the mounting hole 7 and the head 10 of the terminal piece 5 to ensure the electrical connection between the electrode 3 and the terminal piece 5.

A plurality of EL elements 13 are attached to the one surface of the base body 1 by a so-called double-sided tape 14 or the like. Double-sided tape 14
An adhesive is provided on both surfaces of a flexible synthetic resin film. The EL element 13 has a main body 15 and a pair of input terminals 16 and 17. Input terminals 16 and 17 are electrodes 3,
They are respectively placed on the electrodes 4 and soldered to the electrodes 3 and 4 with the solder 20.

An outer sealing material 23 is attached by a double-sided tape 22 to the surface of the base 1 opposite to the surface on which the electrodes 3 and 4 are fixed (downward in FIGS. 1 and 2). An outer sealing material 24 is placed on the top 13. The outer sealing materials 23, 24 are made of a transparent synthetic resin film, and may be made of a material such as polyethylene terephthalate. The outer sealing material 23 is provided with mounting holes 7 and 8 and a mounting hole 25 exposing a part of the base 1 around the mounting holes 7 and 8.

The outer peripheral edges of the outer sealing materials 23 and 24 are heat-sealed airtightly.

Referring to FIG. 4, the EL element 13 has a flat EL light emitting body 28,
The transparent electrode 29 and the electrode 30 made of a material such as aluminum are sandwiched between the transparent electrode 29 and the transparent outer electrode 3 and are transparent.
It is composed of 1,32 airtightly covered. EL luminous body 28
Is an organic dispersion type EL material or the like, and is milky white, and the outer sealing materials 31 and 32 are composed of, for example, trifluoroethylene chloride known by Daikin Industries, Ltd. under the trade name “Daiflon”. The electrodes 29, 30 are connected to the input terminals 16, 17 exposed from the side of the main body 15, respectively. In this way, the EL luminous body 28 is airtightly covered with the outer sealing materials 31 and 32, whereby the moisture-proof function is achieved. Further, a plurality of EL elements 13 having such a structure are used as the outer sealing materials 23, 2
By being airtightly covered by 4, the moistureproof effect is further improved.

Referring again to FIG. 3, the terminal piece 5 has an end portion of the lead wire 33.
34 is fixed by nut 35 and is electrically connected.
Such a structure is the same in relation to the other mounting hole 8. The cylindrical body 36 is attached to the outer sealing material 23 by an adhesive 37 and a mounting hole 25
It is fixed by surrounding it. The tubular body 36 is made of, for example, a synthetic resin material and has a right cylindrical shape. The tubular body 36 has a length that surrounds the terminal pieces 5 and 6 fixed to the mounting holes 7 and 8, and a filler 39 made of a material such as epoxy resin is provided in the tubular body 36.
Is filled and, so to speak, molded.

The filling material 39 is firmly attached to the portion of the base 1 indicated by the reference numeral 40 exposed from the mounting hole 25 formed in the outer sealing material 23 and the portion 41 of the outer sealing material 23 facing the inside of the tubular body 36. Glue to.
Therefore, when an external force acts on the tubular body 36 in the direction of separating from the base body 1 (downward in FIG. 3), the filler 39 causes the base body 1 and the tubular body.
By firmly adhering to 36, it is possible to prevent such external force from acting on the terminal pieces 5 and 6. Therefore, the terminal piece 5 prevents the base body 1 in the vicinity of the mounting hole 7 from being damaged and the terminal piece 5 from coming off the base body 1, and the same applies to the other terminal piece 6. Since the filler 39 is adhered to the base 1 at the portion indicated by the reference numeral 40 in this way, even when the adhesive force of the double-sided tape 22 between the outer sealing material 23 and the base 1 is relatively small, The terminal pieces 5 and 6 can be held on the base 1 with sufficient strength.

As shown in FIG. 5, the EL display device 42 configured in this way has a support base 43 made of a material such as stainless steel.
The surface is fixed to the fixing surface 44 by using a double-sided tape or the like. An insertion hole 45 into which the cylindrical body 36 is inserted is formed on the fixed surface 44 of the support base 43. The EL display devices 42 are partially overlapped with each other as indicated by reference numeral 47 in the length direction thereof, which allows a large display area to be continuously formed.

FIG. 6 is an exploded perspective view of another embodiment of the present invention. The present embodiment is similar to the above-mentioned embodiment, and corresponding parts are designated by the same reference numerals. As shown in FIG. 6 (1), the EL element 13 has its input terminals 16 and 17 soldered to the electrodes 3 and 4 to be electrically connected.

Next, as shown in FIG.
In FIG. 1A, the EL element 13 connected to the electrodes 3 and 4 is turned upside down and mounted. Then, the base 1 and the EL element 13 are bonded together, and the outer peripheral edges of the other outer sealing material 23 and the above-mentioned outer sealing material 24 are heat-sealed. These configurations are the same as those in the above-mentioned embodiment.

In the above-described embodiment, the plurality of EL elements 13 are formed by the outer sealing materials 23 and 24.
However, as another embodiment of the present invention, the single EL element 13 may be covered with the outer sealing materials 23 and 24 to form the EL display device. The base 1 is
It may be in the form of a film, and may be rigid or flexible.

Effects As described above, according to the present invention, the terminal piece and the substrate exposed from the mounting hole of the outer sealing material are covered with the filling material, so that airtightness is achieved and the moisture-proof effect of the EL element is surely achieved. To be achieved.

In addition, since the filler is adhered to the substrate exposed from the mounting hole, even if an external force acts on the filler, the external force is prevented from acting on the terminal piece, and the terminal piece is attached to the substrate. The problem of being detached and destroyed is eliminated, and the strength is improved.

Furthermore, since the EL element is airtightly covered with the outer sealing material together with the self-supporting substrate, the EL element can be mounted in a fixed position while keeping its flat shape.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an EL display device 42 according to an embodiment of the present invention, FIG. 2 is a partial sectional view of the embodiment, and FIG. 3 shows a connecting structure between an electrode 3 and a terminal piece 5. Sectional view, FIG. 4 is a partially cutaway sectional view of the EL element 13, FIG. 5 is an exploded perspective view showing a structure for displaying by using the EL display device 42, and FIG. 6 is another embodiment of the present invention. FIG. 1 ... Substrate, 3,4 ... Electrodes, 5,6 ... Terminal pieces, 7,8,25 ...
Mounting hole, 13 ... EL element, 15 ... Main body, 16,17 ... Input terminal, 23, 24 ... Outer sealing material, 33, 46 ... Lead wire, 36 ... Cylindrical body, 39 ... Filling material

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Hiroyuki Yoshimoto 8-8 Imazahiko Hikobayashi, Nagaokakyo City, Kyoto Prefecture (8) (72) Shinji Ohno 2-21-21 Ichitsuya, Settsu City, Osaka Prefecture (56) References 48-66477 (JP, U) Actual development Sho 59-77795 (JP, U) Actual public 47-38944 (JP, Y1)

Claims (1)

[Scope of utility model registration request] 1. An EL element is electrically connected to an electrode provided along a self-supporting substrate, and the whole of these is hermetically covered with an outer sealing material, and a terminal piece connected to the electrode penetrates the substrate. Then, the base material is exposed in the outer sealing material near the terminal piece to form a mounting hole, and the terminal piece and the base material exposed from the mounting hole are covered with a filler. Characterized by
EL display device.