JPH08153582A - Dispersion type electroluminescent element - Google Patents

Abstract

PURPOSE: To provide a dispersion type electroluminescent element which consumes a decreased power and permits the user to generate any light emission shape as desired. CONSTITUTION: Electrodes 2a, 2b are formed as combteeth on an insulative base film 1, and thereover an insulation layer 4 and a light emission layer 5 are laminated one over another. By means of coating or printing, a transparent electrode 6 is formed in any desired shape through the film formation process followed by drying so that the light emission shape which the user wishes is obtained on the light emission layer 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dispersive electroluminescent device, and more particularly to a dispersive electroluminescent device in which a user can set an arbitrary shape according to his or her preference.

[0002]

2. Description of the Related Art A dispersion type light emitting device having a light emitting layer sandwiched between a pair of electrodes is thin and lightweight and can obtain uniform emission brightness. Therefore, in recent years, it is an illumination member or a light emitting display member of a light receiving type display device such as a liquid crystal device. As a conventional technique of such a dispersion type electroluminescent device, there is, for example, JP-A-5-10.
There is 1893 publication.

However, until now, it has been impossible for the user to set an arbitrary shape of the dispersive electroluminescent device, that is, the user should search for and use a dispersive electroluminescent device that suits his purpose. There is a problem that it is general and it is not always satisfactory.

In order to solve such a problem, in Japanese Patent Application No. 5-154146, an insulator layer is formed on a back electrode, and a phosphor and a dye or pigment are dispersed in a binder on the insulator layer. Then, an ink-like light emitting layer material is formed into a predetermined shape by means of a brush or a brush and dried to form a transparent electrode material on this light emitting layer material, and a voltage is applied to the lead pins provided on the back electrode and the transparent electrode. By doing so, a dispersion type electroluminescent device has been invented in which a user can obtain a light emitting shape according to his or her preference.

[0005]

However, since the transparent electrode material is formed in a region other than the light emitting layer material in the above-mentioned dispersion type electroluminescent device, an electric field is generated in a region other than the light emitting layer material. However, there is a problem in that the power consumption becomes large (when it is driven based on a DC power supply, the capacity of the converter for converting DC to AC must be increased). Further, there is a problem that the designability is impaired because a non-transparent lead pin or a current collector is required in the visible range on the transparent electrode side.

[0006]

According to the present invention, in order to solve the above-mentioned problems, an insulating base film and a pair of electrodes formed on the insulating base film and capable of applying a driving voltage are arranged in a plurality of rows. And a light emitting layer and an insulating layer and a light emitting layer which are sequentially laminated on the drive electrode.

In addition, a display electrode is formed by coating and printing a transparent conductive material into a predetermined shape on the light emitting layer so as to obtain a light emitting shape according to a user's preference.

Further, the light emitting layer is covered with a protective film having a high dielectric constant, and a transparent electrode material is formed into a predetermined shape by coating or printing on the protective film in order to obtain a light emitting shape according to a user's preference. And a display electrode is formed.

[0009]

[Operation] A pair of electrodes to which a drive voltage can be applied are arranged in a plurality of rows on the insulating base film to form a drive electrode,
By sequentially laminating an insulating layer and a light emitting layer on the drive electrode, a display electrode having an arbitrary shape can be formed on the light emitting layer with a transparent electrode material. Can be obtained. Further, since it is not necessary to directly apply the drive voltage to the display electrode side, a non-translucent current collector and lead pins are not necessary, and the design is improved.

In order to form a light emitting portion on the light emitting layer, a display electrode is formed by coating and printing a transparent electrode material in a predetermined shape by coating or printing to obtain a light emitting shape according to a user's preference. Thus, not only the user can easily obtain a light emitting shape according to his / her preference, but also an electric field is less generated except where the display electrode is formed, so that a dispersion type electroluminescent device with low power consumption is obtained.

Further, the light emitting layer is covered with a protective film having a high dielectric constant, and an ink-like transparent conductive material is applied or printed on the protective film to form a display electrode having a predetermined shape according to the user's preference. By doing so, it is possible to easily obtain a light emitting shape according to the user's preference, and since the light emitting layer is covered with the protective film, it is possible to form or remove the display electrode. It is possible for the user to repeatedly obtain a light emission shape according to his or her preference.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on the embodiments shown in the accompanying drawings.

1 and 2, a thickness of 20 to 4 is formed on an insulating base film 1 made of PET, polyimide or the like.
First and second electrode terminals 2a, which are made by bonding a conductive material such as copper (Cu) and aluminum (Al) having a thickness of 0 μm with an adhesive or the like and can partially apply a driving voltage by means such as etching.
1, 2b1 and also includes a first electrode 2a and a second electrode 2b
And an electrode member 3 that forms a comb-teeth-shaped electrode (driving electrode) 2 that is electrically divided from each other.
The first and second electrode terminals 2a1 and 2b1 are configured to project in the circumferential direction. Then, an insulator layer 4 and a light emitting layer 5 are sequentially laminated at the opposite positions of the electrode 2, and one surface (upper surface) of the light emitting layer 5 is made of, for example, a conductive fine powder having visible light transmittance. Indium tin oxide (IT
O) is a resin having a film-forming property and is coated or printed with a conductive paste (transparent electrode material) in which acrylic melamine is dispersed to form a predetermined shape (in the figure, according to the user's preference).
A transparent electrode (display electrode) 6 is formed by drying the film in (H). Therefore, the light emitting portion 7 is composed of the electrode member 3, the insulating layer 4, the light emitting layer 5, and the transparent electrode 6.
Then, the first and second electrode terminals 2a1, 2b of the electrode member 3
1 is surrounded by a pair of sealing films 8 and 9 so as to be exposed to the outside and laminated.

With such a configuration, the wiring cord of an external drive circuit (not shown) is connected to the first and second electrode terminals 2a1 and 2b1 and a predetermined voltage is applied to the light emitting portion 7 according to the light emitting shape desired by the user. Emits light.

Next, the principle of light emission of the light emitting section 7 having such a structure will be described with reference to FIG.

When a predetermined voltage (AC voltage) is applied to the first and second electrode terminals 2a1 and 2b1 formed on the electrode member 3, the light emitting portion 7 has an insulator layer 4, a light emitting layer 5 and a transparent electrode 6.
A voltage is applied between the electrodes 2a and 2b (comb-teeth-shaped electrode 2) via (the film formed in a predetermined shape by the user), and an electric field is applied to the light-emitting layer 5, so that the user can apply or The location where the transparent electrode 6 is formed to obtain a desired predetermined shape by means such as printing, that is, the light emitting portion 7 having the predetermined shape is the light emitting layer 5.
The light is emitted according to the emission color of.

According to the present invention having such a structure, a pair of electrodes to which a driving voltage which is electrically divided into two can be applied on the insulating base film 1 are arranged in a plurality of rows in a linear manner so as to be closely arranged. A comb-teeth-shaped electrode 2 arranged in parallel, an insulator layer 4 and a light emitting layer 5 are sequentially laminated on the electrode 2, and an ink-like transparent conductive material is formed on the light emitting layer 5 according to the user's preference. Transparent electrode 6 which is formed into a predetermined shape by coating or printing
By forming the above, the user can obtain a light emission shape according to his / her preference, and since an electric field is rarely generated except the film forming portion of the transparent electrode 6 having a predetermined shape, the distributed electric field with low power consumption is formed. A light emitting device can be obtained.

Further, since the non-transmissive lead pin or the current collector for directly applying the drive voltage to the transparent electrode 6 side is not required, the design can be improved.

Although the present embodiment has been described using the comb-teeth-shaped electrode 2, the present invention is not limited to this.
For example, as shown in FIG. 4, a pair of electrodes capable of applying a drive voltage electrically divided into two may be formed in a spiral shape, and a plurality of electrically divided electrodes capable of applying a drive electrode may be used. Any line electrodes may be arranged in close proximity to each other.

Regarding the formation of the transparent electrode 6, in the case where the sealing film 9 is adhered to the light emitting layer 5, the transparent electrode 6 having an arbitrary shape is formed on the light emitting layer 5 side of the sealing film 9. Then, the sealing film 8 on the side of the base film 1
The transparent electrode 6 may be disposed on the light emitting layer 5 by performing a laminating process.

The light emitting layer 5 is covered with, for example, a protective film made of epoxy and having a relative permittivity of 4 or more, and a transparent electrode 6 having an arbitrary shape is formed on the protective film, so that the user can select a desired film. It is possible to obtain a different emission shape, and
The transparent electrode 6 is provided to cover the light emitting layer 5 with the protective film.
The film formation and removal can be repeatedly performed, and the user can repeatedly obtain a light emission shape according to his or her preference.

After the transparent electrode 6 is formed on the protective film, a pair of sealing films 8 shown in FIGS.
The laminating process may be performed at 9.

If the white light emitting layer 5 is formed on the insulating layer 4 and the transparent electrode 6 having an arbitrary shape is formed on the light emitting layer 5 with a transparent electrode material colored with a dye or a pigment, the user can Can obtain a light emission shape and a light emission color according to preference.

Further, in this embodiment, the lead pins for applying the voltage by pulling out the respective electrode terminals 2a1, 2b1 of the electrode member 3 in the circumferential direction are not required, but the respective electrodes 2a, 2b are not required.
Alternatively, the lead pins may be attached with an adhesive tape or the like.

Further, when the transparent electrode 6 is applied with a brush or a brush, the light emission brightness of the light emitting portion 7 having a predetermined shape changes depending on the thickness of the transparent electrode 6, so that a three-dimensional light emitting shape is obtained. can get.

[0026]

According to the present invention, an insulating base film, a drive electrode in which a pair of electrodes, which are formed on the insulating base film and to which a drive voltage can be applied, are arranged side by side in a plurality of rows, are provided on the drive electrode. It is characterized by comprising an insulator layer and a light emitting layer which are sequentially laminated on the light emitting layer, and a display electrode having an arbitrary shape can be formed on the light emitting layer by a transparent electrode material. It is possible to obtain a light emission shape according to the above, and since it is not necessary to directly apply a drive voltage to the display electrode side, a non-translucent current collector and lead pins are not necessary, which contributes to improved design. is there.

Further, the present invention is characterized in that a display electrode is formed by coating and printing a transparent conductive material in a predetermined shape in order to obtain a light emitting shape according to a user's preference on the light emitting layer. Not only can the user easily obtain a light-emitting shape according to his / her preference, but since an electric field is less generated except where the display electrode is formed, it is possible to obtain a dispersed electroluminescent device with low power consumption.

Further, the light emitting layer is covered with a protective film having a high dielectric constant, and a transparent electrode material is formed on the protective film into a predetermined shape by coating or printing in order to obtain a light emitting shape according to a user's preference. A display electrode can be formed or removed by covering the light emitting layer with the protective film, so that the display electrode can be formed or removed. Can be repeatedly obtained.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part showing an embodiment of the present invention.

FIG. 2 is an exploded perspective view of the above embodiment.

FIG. 3 is a diagram showing a light emitting principle of the embodiment.

FIG. 4 is a diagram showing another embodiment of the present invention.

[Explanation of symbols]

 1 Base Film 2 Electrode (Drive Electrode) 2a First Electrode 2b Second Electrode 4 Insulator Layer 5 Light Emitting Layer 6 Transparent Electrode (Display Electrode)

Claims (3)

[Claims] 1. An insulating base film, a drive electrode formed by arranging a pair of electrodes formed on the insulating base film and capable of applying a drive voltage side by side in a plurality of rows, and sequentially laminated on the drive electrode. And an insulating layer and a light-emitting layer which are formed. 2. A display electrode is formed by coating and printing a transparent conductive material in a predetermined shape on the light emitting layer to obtain a light emitting shape according to a user's preference. The dispersion type electroluminescent device as described in 1. 3. The light emitting layer is covered with a protective film having a high dielectric constant, and a transparent electrode material is formed into a predetermined shape on the protective film by coating or printing in order to obtain a light emitting shape according to a user's preference. The dispersion-type electroluminescent device according to claim 1, wherein the display electrode is formed by using the display electrode.