JP2002329584A - El luminescent device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an EL luminescent device of which a desired luminous pattern can be made simply by a user. SOLUTION: This EL luminescent device 10 is provided with a rear surface electrode layer 20 composed of a local variable sheet-like member 22 and an electric conductive sheet 24 adhered on the entire rear surface of the member 22. The electrical property of the part of the member 22 is changed partially in the thickness direction by the physical operation or the chemical operation. Therefore, the user simply can make the desired luminous pattern 11 by applying a local pressure on the front surface of the EL luminescent device 10 with the tip end of a bar or the like, or by applying a solvent with a writing brush.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an EL light-emitting device having an EL light-emitting layer, and more particularly to a technique that allows a user to freely draw a light-emitting pattern.

[0002]

2. Description of the Related Art By applying an AC voltage to a transparent electrode and a back electrode sandwiched in the thickness direction of an EL light emitting layer made of an electroluminescent material, the EL light emitting layer is locally localized in a light emitting pattern corresponding to the shape of the back electrode. 2. Description of the Related Art There is known an EL light emitting device of a type that emits light. For example, Japanese Utility Model Registration No. 3034483 previously filed by the present applicant is such. Such a sheet-shaped thin light-emitting device is generally configured to have flexibility as a whole, and is used for various purposes as a backlight of a light-emitting display panel, a backlight of a light-emitting decorative plate, and the like.

[0003]

By the way, in the above-mentioned EL light-emitting device, light is emitted in a light-emitting pattern defined by a light-transmitting portion of a mask fixed on the entire surface. There is a difficulty in easily creating or changing the light emission pattern.
In addition, it is difficult to create a mask for a complicated pattern, a thin pattern, or a pattern that includes blurring.
There were restrictions on the degree of freedom of expression.

On the other hand, it has been proposed to form a back electrode having a shape corresponding to a desired light emitting pattern by applying a conductive paste by screen printing. However, there is a drawback that the cost cannot be increased and the cost increases.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide an EL light emitting device that allows a user to easily create a desired light emitting pattern.

[0006]

A first object of the present invention to achieve the above object is to apply an AC voltage to a transparent electrode and a back electrode sandwiched in the thickness direction of an EL light emitting layer. E of a type in which the EL light emitting layer emits light locally in a light emitting pattern corresponding to the shape of the back electrode
An L-light emitting device, wherein the back electrode has (a) an insulating property as a whole, and a thickness direction according to a physical or chemical operation for selectively emitting light from the EL light emitting layer. And (b) a flexible conductive sheet closely contacting the entire back surface of the sheet-shaped member.

[0007]

According to the first aspect of the present invention, there is provided an EL light-emitting device having a back electrode composed of a locally variable sheet member and a conductive sheet closely contacted with the entire back surface thereof. Since the electrical properties in the thickness direction are locally changed by physical or chemical manipulation of the part, local pressure is applied at the tip of the rod, for example, or the solvent is removed by a brush to selectively emit light. Since the light emission pattern is created by the application, an EL light emitting device in which a desired light emission pattern can be easily created by a user's operation is obtained.

[0008]

In another preferred embodiment of the present invention, the locally variable sheet-like member preferably includes microcapsules containing a conductive substance such as metal particles, carbon particles, and conductive resin particles. The microcapsules are destroyed by the application of an appropriate pressing force, the application of heat, or the local application of a solvent that dissolves the skin of the microcapsules. It can be increased or the dielectric constant can be reduced. With this configuration, in a state where an AC voltage is applied to the transparent electrode and the back electrode, the AC electric field is strongly applied to a portion of the EL light emitting layer corresponding to the portion where the local pressure is applied at the tip of the rod. And the desired part selectively emits light.

Preferably, the locally variable sheet-like member includes a gel-like substance and magnetic metal particles mixed in the gel-like substance. For example, a local magnetic field is generated by using a magnet. By providing the magnetic metal particles, the magnetic metal particles are locally concentrated to increase the conductivity or to lower the dielectric constant. With this configuration, when an AC voltage is applied to the transparent electrode and the back electrode,
In the EL light emitting layer, an AC electric field strongly acts on a portion corresponding to a portion to which a local magnetic field is applied at the end of the magnet, and a desired portion selectively emits light.

Preferably, the locally variable sheet-like member includes a highly viscous gel-like material layer and a flexible conductive layer laminated on the entire surface thereof, and is formed by local pressing. When the conductive layer is depressed, the conductivity in the thickness direction is increased. When the conductive particles are mixed in the high-viscosity gel-like substance layer, the conductive particles are locally brought into close contact with each other to be conducted in the thickness direction.
When the conductive particles are not mixed in the high-viscosity gel-like material layer, the conductive layer which has been locally recessed is brought close to the opposite side until the conductive layer substantially reaches the opposite side, and is made conductive in the thickness direction.
The highly viscous gel-like material layer does not return even after the local pressing force is released, and the local depression is maintained until the viscosity is reduced by, for example, heating. With this configuration, when an AC voltage is applied to the transparent electrode and the back electrode, the AC electric field is strongly applied to a portion of the EL light emitting layer corresponding to a portion to which a local magnetic field is applied at the end of the magnet. And the desired part selectively emits light.

[0011]

A second aspect of the present invention for achieving the above object is an EL device.
An EL light emitting device of a type in which an AC voltage is applied to a transparent electrode and a back electrode sandwiched in the thickness direction of the light emitting layer to locally emit light from the EL light emitting layer in a light emitting pattern corresponding to the shape of the back electrode. The back electrode, (a) a plurality of pattern electrodes drawn in an independent pattern by a conductive material to selectively emit light in a part of the EL light emitting layer, (b) the plurality of And a wire bonded to each of the plurality of pattern electrodes using a conductive resin in order to make the pattern electrodes mutually conductive.

[0012]

In this way, the plurality of pattern electrodes drawn in an independent pattern by the conductive material and the plurality of pattern electrodes for making them mutually conductive are hot In an EL light-emitting device provided with a back electrode composed of a wire bonded using a melt conductive resin, a plurality of pattern electrodes drawn in independent patterns are mutually connected by a wire bonded using a conductive resin. Since the light emitting patterns are connected, even a thin pattern electrode or a small pattern electrode can be easily interconnected and a light emitting pattern is created. Therefore, an EL light emitting device that can easily create a desired light emitting pattern by a user operation is provided. can get.

[0013]

In another preferred embodiment of the second invention, preferably, the conductive resin is a hot melt resin which is fluidized by heating but solidifies at room temperature, and a conductive material such as metal particles, carbon particles, etc. Is mixed in such a ratio as to have conductivity. By doing so, the bonding of the wire to the plurality of pattern electrodes can be performed in a short time,
The efficiency of the connection work of the pattern electrodes is improved.

[0014] Preferably, the pattern electrode is formed by applying and fixing a conductive ink by an ink jet printer. This way, for example,
Since the back electrode is formed by applying the conductive ink by the ink jet printer in accordance with the desired pattern output from the personal computer, an EL light emitting device in which a desired light emitting pattern can be easily created by a user's operation can be obtained.

[0015] Preferably, the pattern electrode is formed by applying and fixing a conductive toner by an electrostatic printer. By doing so, for example, the conductive toner is applied by an electrostatic printer according to a desired pattern output from a personal computer to form a back electrode, so that a desired light emitting pattern can be easily operated by the user. An EL light emitting device that can be manufactured is obtained.

Preferably, the pattern electrode is formed by applying and fixing conductive ink using a brush. By doing so, for example, the conductive ink is applied in accordance with a desired pattern drawn according to an operation using a brush to form the back surface electrode, so that a desired light emitting pattern can be easily created by a user's operation. An EL light emitting device is obtained.

Preferably, in the pattern electrode, an adhesive is applied in a predetermined pattern, and powder made of conductive particles is dispersed and fixed to the adhesive.
With this configuration, the adhesive is applied in a predetermined pattern by brush, screen printing, or the like, and the powder of the conductive particles is scattered and fixed to the adhesive to form the back surface electrode. An EL light emitting device in which a light emitting pattern can be easily created by a user's operation is obtained.

[0018]

A third aspect of the present invention for achieving the above object is an EL device.
An EL light emitting device of a type in which an AC voltage is applied to a transparent electrode and a back electrode sandwiched in the thickness direction of the light emitting layer to locally emit light in the EL light emitting layer in a light emitting pattern corresponding to the shape of the back electrode. A) an insulating sheet comprising a flexible fiber sheet made of a natural fiber or a synthetic fiber, and a synthetic resin layer having a plurality of fine holes formed on one surface of the flexible fiber sheet on the EL light emitting layer side; And b) in order to selectively emit light from a part of the EL light emitting layer, the surface of the synthetic resin layer of the insulating sheet is drawn in a predetermined pattern by a predetermined pattern using a conductive material. A pattern electrode, and c) a conductive paint applied to a position corresponding to the pattern electrode on the flexible fiber sheet of the insulating sheet to electrically connect the pattern electrode and the fine hole, To include A.

[0019]

According to the third aspect of the present invention, an electric pattern is formed on a synthetic resin layer of an insulating sheet by a conductive material in an independent pattern, and a plurality of small holes formed in the synthetic resin layer are used for electric connection. The conductive paint applied to the position corresponding to the pattern electrode is provided on the flexible fiber sheet of the insulating sheet in order to make the connection electrically, so that it can be formed into an arbitrary shape by handwriting with a brush, a felt pen, or the like. Since the drawn pattern electrodes can be easily connected to form a light emitting pattern, an EL light emitting device in which a desired light emitting pattern can be easily formed by a user's operation can be obtained.

[0020]

In another preferred embodiment of the present invention, preferably, when the conductive material for forming the pattern electrode is applied on the synthetic resin layer of the insulating sheet, the conductive material passes through the fine holes of the synthetic resin layer. The insulating sheet is thermocompression-bonded to the EL light emitting layer by melting the synthetic resin layer. With this configuration, when the insulating sheet is thermocompression-bonded, the fine holes through which the conductive material has passed are not closed, but the fine holes in the portion where the pattern electrode is not formed are closed. The conductive paint applied on the sheet and soaked is suppressed from seeping out to the EL light emitting layer side in a portion where the pattern electrode is not provided, and leakage light emission and the like are suitably prevented.

Preferably, the conductive material and the conductive paint include carbon particles, a resin adhesive, and a solvent. In this case, since the carbon particles are chemically stable, there is no change in conductivity with time, and E
The durability of the L light emitting device is improved.

[0022]

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 is a front view showing a thin EL light emitting device 10 according to one embodiment of the present invention. This EL light emitting device 10
Are displayed in a luminous pattern 11 drawn on the user side, for example.

FIG. 2 is a perspective view showing the back surface of the EL light emitting device 10, and FIG. 3 is a sectional view of a principal part for explaining the structure of the EL light emitting device 10. 2 and 3, E
The L light emitting device 10 is formed by laminating a flexible transparent resin sheet 14 made of, for example, a PET resin film, on which a transparent conductive layer 12 such as ITO is provided on one surface, and in close contact with one surface of the transparent resin sheet 14. A flexible EL (electroluminescence) light-emitting layer 16, a flexible insulating sheet 18 laminated preferably in close contact with the EL light-emitting layer 16, preferably containing inorganic particles, and one surface of the resin-made insulating sheet 18; Is provided with a laminated structure in which the back electrode layer 20 provided on the substrate is laminated.

The EL light emitting layer 16 is formed by bonding a large number of microcapsules in which phosphor or phosphor particles are covered with an insulating material with a resin or the like, and an AC voltage is applied thereto. This emits light of a predetermined color, for example, blue-green. The insulating sheet 18
Contains a white pigment such as titanium oxide. Further, the back electrode layer 20 has an insulating property as a whole,
A locally variable sheet-like member 22 of the EL light-emitting layer 16 in which the electrical properties in the thickness direction are locally changed according to a physical or chemical operation to selectively emit light.
And a flexible conductive sheet 24 closely contacting the entire back surface of the sheet member 22. The conductive sheet 24 is formed by bonding carbon particles with a resin or the like, is formed of a metal deposition film such as an ITO film, or is formed of a metal foil such as copper or aluminum. It has conductivity.

The locally variable sheet member 22 is
For example, as shown in FIG. 4, metal particles, carbon particles,
The microcapsule 30 includes a microcapsule 30 having a conductive substance 28 such as conductive resin particles in the outer shell, and is provided with a local pressing force enough to break the outer shell of the microcapsule 30 or the microcapsule 30 The microcapsules 30 are obtained by local application of a solvent that dissolves the shell.
As shown in the central part of FIG. 4, the conductive material 28 in the outer skin is brought into contact with each other, thereby locally increasing the conductivity of the part, or as shown in the central part of FIG. The rate is reduced locally.

The edges of the EL light emitting layer 16, the resin insulating sheet 18, the locally variable sheet member 22, and the conductive sheet 24, which are stacked together, are located inside the edges of the transparent resin sheet 14. The insulating film 34 which is a resin resist film is formed on the entire surface except the edge of the conductive sheet 24 by screen printing, for example, and the resin insulating sheet 18 on the edge of the transparent resin sheet 14 is formed. An insulating film 36 as a resin resist film is formed on a part of the side. A conductive paste is applied to the edge of the conductive sheet 24 on the resin insulating sheet 18 and the edge of the transparent conductive layer 12 on the transparent resin sheet 14 by screen printing, for example. Are formed in a longitudinal shape along the edge. These connections 38 and 4
Numeral 0 denotes a conductive layer formed by bonding metal powders such as copper powder, aluminum powder, and silver powder in a state of contact with each other with a resin or the like, and electrically conductive to the conductive sheet 24 and the transparent conductive layer 12, respectively. Have been.

The EL constructed as described above
In the light emitting device 10, for example, an alternating current of about 300 V is applied to the pair of connection portions 38 and 40, that is, to the transparent conductive layer (transparent electrode) 12 and the back electrode layer (back electrode) 20 sandwiching the EL light emitting layer 16. When a voltage is applied, an AC electric field is generated between the transparent conductive layer 12 and the portion of the locally variable sheet member 22 in which the microcapsules 30 are broken and the conductivity is increased or the dielectric constant is reduced. Since the voltage is applied locally, only the portion to which the AC electric field is applied is locally caused to emit light, and the light emitting pattern 11 as described above is obtained.

In the EL light emitting device 10 of this embodiment,
A back surface electrode layer 20 including a locally variable sheet-like member 22 and a conductive sheet 24 closely contacted with the entire back surface thereof is provided, and a part of the locally variable sheet-like member 22 is locally formed by a bar or the like. Since the electrical properties in the thickness direction are locally changed by a physical operation such as pressing, local heating using an electric iron or the like, or a chemical operation such as application of a solvent using a writing instrument, for example, a desired operation is performed on the front surface of the EL light emitting device 10. In order to selectively emit the light-emitting pattern 11, the light-emitting pattern 11 is created by applying a local pressure, for example, at the tip of a rod, or by applying a solvent with a brush.
Can be easily created by user operation. Further, since the electrical properties of the locally variable sheet-like member 22 are changed according to the pressing force, shading is formed in the light emitting pattern, so that the degree of freedom of expression is further enhanced.

Next, another embodiment of the present invention will be described. In the following description, the same parts as those in the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted.

FIG. 5 is a view for explaining the configuration of the locally variable sheet member 22 according to another embodiment of the present invention. FIG.
The locally variable sheet-like member 22 includes a gel-like substance 44 having electrical insulation such as a silicon resin gel, and magnetic metal particles 46 mixed and dispersed in the gel-like substance 44. For example, when a local magnetic field is applied using a magnet, for example, as shown in the center of FIG. 5, the magnetic metal particles 46 are locally concentrated to increase the conductivity or to increase the dielectric constant. It can be reduced. With this configuration, when an AC voltage is applied between the transparent electrode layer 12 functioning as a transparent electrode and the back electrode layer 20 functioning as a back electrode, the end portion of the magnet of the EL light emitting layer 16 Therefore, the AC electric field strongly acts on a portion corresponding to the portion where the local magnetic field is applied, and the desired portion selectively emits light.

FIG. 6 is a view for explaining the configuration of the locally variable sheet member 22 according to another embodiment of the present invention. FIG.
The locally variable sheet-like member 22 includes a high-viscosity gel-like substance layer 49 such as a high-viscosity silicone resin and a back electrode layer 20.
For example, it is configured by laminating a flexible conductive layer 48 similar to the conductive sheet 24, which is laminated on the entire surface on one side. In this locally variable sheet-like member 22, local pressing from the conductive layer 48 side causes
As shown in the center of the figure, the conductive layer 48 is locally dented to increase the conductivity in the thickness direction. When the conductive particles are mixed in the high-viscosity gel-like substance layer 49, the conductive particles and the conductive layer 48 are locally brought into close contact with each other to be conducted in the thickness direction. When the conductive particles are not mixed in the high-viscosity gel-like substance layer 49, the conductive layer 48 which is locally recessed is brought close to the opposite side until the conductive layer 48 substantially reaches the opposite side, and is made conductive in the thickness direction. . The highly viscous gel-like material layer 49 does not return even after the local pressing force is released, and the local dent is maintained until the viscosity is reduced by, for example, heating. With this configuration, in the state where an AC voltage is applied between the transparent electrode layer 12 functioning as a transparent electrode and the back electrode layer 20 functioning as a back electrode, the conductive layer 48 of the EL light emitting layer 16 is used. The AC electric field strongly acts on the portion corresponding to the recessed portion, and the desired portion selectively emits light.

FIG. 7 shows an EL device according to another embodiment of the present invention.
The light emitting device 50 is shown. This EL light emitting device 50
The back electrode structure is different from that of the above-described EL light emitting device 10, but the other portions are common. A plurality of back electrodes 52 of the EL light emitting device 50 are drawn on the insulating sheet 18 in an electrically independent pattern by a conductive material in order to selectively emit light at a desired portion of the EL light emitting layer 16. In order to electrically connect the plurality of pattern electrodes 54 and the plurality of pattern electrodes 54 to each other and to the connection portion 38,
And a wire rod 58 bonded to each of the plurality of pattern electrodes 54 using a hot melt conductive resin 56. The insulating film 34 is formed on the pattern electrode 54
Are formed at positions corresponding to the pattern electrodes 54, and the pattern electrodes 54 are connected to each other through the through holes 60. A cover sheet (not shown) is provided on the back electrode 52.

The pattern electrode 54 is fixed by applying a well-known conductive ink in a desired pattern using an ink jet printer, spray, writing tool such as a brush or a (felt) pen. It is applied and fixed in a desired pattern by an electrostatic printer, or a conductive paste is applied and fixed in a desired pattern by a screen printer, or
An adhesive is applied in a desired pattern, and a powder of conductive particles is dispersed and fixed on the adhesive.

The hot melt conductive resin 56
Is a hot-melt resin that is fluidized by heating but solidifies at room temperature, in which conductive substances such as metal particles and carbon particles are mixed in a proportion that has conductivity as a whole. According to this, a plurality of pattern electrodes 5
Since the bonding of the wire rod 58 to the connection member 4 and the connecting portion 38 can be performed in a short time, the efficiency of the electrical connection operation is improved.

FIG. 8 shows an EL device according to another embodiment of the present invention.
FIG. 3 is a diagram illustrating a configuration of a light emitting device 64. In FIG. 8, a flexible fiber sheet 66 made of a natural fiber or a synthetic fiber and a small hole 68 adhered to one surface of the flexible fiber sheet 66 on the EL light emitting layer 16 side are the same on the insulating sheet 18. An insulating sheet 72 composed of a plurality of synthetic resin layers 70 formed at a high density is bonded. This synthetic resin layer 70
Is preferably made of a hot melt resin that is melted (flowed) by heating. The insulating sheet 72 is adhered on the EL light emitting layer 16 by applying pressure under heating to such an extent that the hot melt resin is melted. On the surface of the synthetic resin layer 70 of the insulating sheet 72, a pattern electrode 74 drawn in a predetermined pattern by a conductive material is provided to selectively emit light from a part of the EL light emitting layer 16. I have. This conductive material is formed by mixing, for example, carbon particles, a resin adhesive, and a solvent, and can be freely drawn with a writing implement such as a brush or a felt pen using this conductive material. The conductive material applied in this manner is allowed to reach the flexible fiber sheet 66 through the small holes 68 of the synthetic resin layer 70, and thus corresponds to the position of the pattern electrode 74 during the thermocompression bonding of the insulating sheet 72. The small holes 68 provided at the other positions are not closed, but the small holes 68 provided at other positions are closed.

On the synthetic resin layer 70 of the insulating sheet 72, the pattern electrodes 74 and the small holes 6 of the synthetic resin layer 70 are provided.
Insulation sheet 7 for electrical connection through
A conductive paint 76 is applied to a position corresponding to the pattern electrode 74 on the second flexible fiber sheet 66. This conductive paint 76, like the conductive material,
For example, it is formed by mixing carbon particles, a resin adhesive, and a solvent. In order to establish conduction between the pattern electrodes 74 and between the pattern electrodes 74 and the connection portions 38, flexible fibers are used. The coating is applied to a region corresponding to each pattern electrode 74 on the sheet 66 and a region between any of the regions corresponding to each pattern electrode 74 and the connection portion 38. The applied conductive paint 76 penetrates the flexible fiber sheet 66 and is connected to the conductive material that has passed through the fine holes 68.

According to this embodiment, the pattern electrode 74 is freely drawn by applying a conductive material, and the insulating sheet 72 is thermocompression-bonded thereon, and the conductive sheet is further placed on the insulating sheet 72. Since it is configured by applying the conductive paint 76, no special equipment is required,
An EL light emitting device 64 having a desired light emitting pattern can be configured.

While the embodiment of the present invention has been described with reference to the drawings, the present invention can be applied to other embodiments.

For example, in the embodiment of FIG.
By selecting the material of the magnetic metal particles 46, the pattern drawn once by the magnet is reset by unmagnetizing the magnetic metal particles 46 using an alternating magnetic field coil,
The pattern can be drawn by the magnet so that a desired light emitting pattern is obtained again.

In the embodiment of FIG. 7, the hot melt conductive resin 56 is used to connect the wire 58 to the plurality of pattern electrodes 54 and the connection portions 38. A conductive adhesive in which conductive particles are mixed in an adhesive such as a resin that dissolves) or rubber paste may be used. The conductive adhesive made of an aqueous resin has an advantage that the microcapsule resin of the EL light emitting layer 16 is not changed.

In the above-described embodiment, the EL light emitting device 10 is rectangular and has a straight edge, but the EL light emitting device 10 is circular or oval and has a curved edge. Is also good.

Also, the EL light emitting device 10 of the above-described embodiment,
In 50, the insulating sheet 18 may not necessarily be provided.

Further, in the above-described embodiment, the connection portion 3
Although the metal powders 8 and 40 are mutually connected by a resin or the like in a state where the metal powders are in contact with each other, a conductor formed by another process such as metal deposition or metal plating may be used.

The above is merely an example of the present invention, and the present invention can be variously modified without departing from the gist thereof.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a front view of an EL light emitting device according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a part of the back surface of the EL light emitting device of FIG.

FIG. 3 is a partial cross-sectional view illustrating a main part of the EL light emitting device of FIG.

FIG. 4 is a cross-sectional view schematically illustrating a configuration of a locally variable sheet-like member 22 provided in the EL light emitting device of FIG.

5 is a cross-sectional view schematically illustrating a configuration of a locally variable sheet-like member 22 provided in an EL light emitting device according to another embodiment of the present invention, and is a view corresponding to FIG.

FIG. 6 is a cross-sectional view schematically illustrating a configuration of a locally variable sheet-like member 22 provided in an EL light emitting device according to another embodiment of the present invention, and is a view corresponding to FIG.

FIG. 7 is a cross-sectional view illustrating a main part of a configuration of an EL light emitting device according to another embodiment of the present invention.

FIG. 8 is a cross-sectional view illustrating a main part of a configuration of an EL light emitting device according to another embodiment of the present invention.

[Explanation of symbols]

 10: EL light emitting device 12: Transparent conductive layer (transparent electrode) 16: EL light emitting layer 20: Back electrode layer (back electrode) 22: Locally variable sheet-like member 50: EL light emitting device 52: Back electrode 54: Pattern electrode 56: Hot melt conductive resin 58: Wire

Claims (10)

[Claims] An AC voltage is applied to a transparent electrode and a back electrode sandwiching the EL light emitting layer in a thickness direction of the EL light emitting layer to locally emit light in the EL light emitting layer in a light emitting pattern corresponding to the shape of the back electrode. An EL light emitting device, wherein the back electrode has an insulating property as a whole, and has an electrical property in a thickness direction according to a physical or chemical operation for selectively emitting light from the EL light emitting layer. An EL light-emitting device comprising: a locally variable sheet-like member that is locally changed; and a flexible conductive sheet that is in close contact with the entire back surface of the sheet-like member. 2. A method in which an AC voltage is applied to a transparent electrode and a back electrode sandwiched in the thickness direction of the EL light emitting layer to cause the EL light emitting layer to locally emit light in a light emitting pattern corresponding to the shape of the back electrode. An EL light-emitting device, wherein the back electrode has a plurality of pattern electrodes drawn in an independent pattern with a conductive material to selectively emit light in a part of the EL light-emitting layer; And a wire bonded to each of the plurality of pattern electrodes using a conductive resin in order to electrically connect the pattern electrodes to each other. 3. The EL light emitting device according to claim 2, wherein the conductive resin is a hot-melt resin which is fluidized by heating but solidifies at room temperature, into which a conductive substance is mixed. 4. The EL light emitting device according to claim 2, wherein said pattern electrode is formed by applying and fixing a conductive ink by an ink jet printer. 5. The EL light emitting device according to claim 2, wherein said pattern electrode is formed by applying and fixing a conductive toner by an electrostatic printer. 6. The pattern electrode is formed by applying and fixing conductive ink using a writing instrument.
Or 3 EL light-emitting devices. 7. The EL light emitting device according to claim 2, wherein the pattern electrode is formed by applying an adhesive in a predetermined pattern, and dispersing and fixing a powder made of conductive particles to the adhesive. . 8. A method in which an AC voltage is applied to a transparent electrode and a back electrode sandwiched in the thickness direction of the EL light emitting layer to cause the EL light emitting layer to locally emit light in a light emitting pattern corresponding to the shape of the back electrode. An EL light-emitting device, comprising: a flexible fiber sheet made of a natural fiber or a synthetic fiber; and a synthetic resin layer having a plurality of fine holes formed on one surface of the flexible fiber sheet on the EL light-emitting layer side. And an insulating sheet made of the following: drawn in a predetermined pattern by a conductive material on a surface of a synthetic resin layer of the insulating sheet in order to selectively emit light from a part of the EL light emitting layer. And a conductive paint applied to a position corresponding to the pattern electrode on the flexible fiber sheet of the insulating sheet to electrically connect the pattern electrode and the fine hole through the fine hole. And an EL light-emitting device. 9. The synthetic resin layer is made of a hot melt resin which is brought into a molten state by heating, and a conductive material for forming the pattern electrode is applied to the pattern electrode when applied on the synthetic resin layer. 9. The EL light emitting device according to claim 8, wherein the insulating sheet is passed through a small hole, and the insulating sheet is thermocompression-bonded to the EL light emitting layer by melting the synthetic resin layer. 10. The conductive material and the conductive paint,
10. The EL light emitting device according to claim 9, comprising carbon particles, a resin adhesive, and a solvent.