JPH0527997U - Dispersion EL element - Google Patents

Abstract

(57) [Summary] [Purpose] Negative display and positive display are performed in a dispersed EL device without any defect. [Constitution] On the back side of the back electrode 11, a ground 11A and an island-shaped ground 11C
An insulating layer 12A is formed so as to extend between the insulating layer 12A and the outer edge of the ground 11A, and the insulating layer 12B is also formed between the outer end of the base 11A and FIG. 11B. Also,
A conductor 13C is provided between the island-shaped ground 11C and the ground 11A to form an insulating layer 12A.
11B is connected to the conductor 13B, and the conductor 13B is laid on the insulating layer 12B. Furthermore, the ground 11
One end of the conductor 13A is connected to the outer end side of A and each conductor 13
Pull out A and 13B in the circumferential direction of the back electrode 11. [Effect] Since the island-shaped ground 11C and FIG. 11B are electrically connected to the outside so as not to come into contact with each other, the positive display by FIG. It can be carried out.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a dispersed EL (electroluminescence) element, and more particularly to improvement of a wiring layout structure of a back electrode.

[0002]

[Prior Art]

 Generally, this type of EL element is used for a backlight of a liquid crystal display device or the like, and has the structure shown in FIGS. 5 and 6 as disclosed in, for example, Japanese Utility Model Publication No. 3-69898. .. This is an insulating layer 2 formed by laminating an insulating layer 2 in which a white high-dielectric-constant powder such as barium titanate is mixed in a high-dielectric-constant organic substance on a back electrode 1 made of a reflective conductive material such as aluminum. A light emitting layer 3 in which a fluorescent substance powder such as Zns is mixed in a high dielectric constant organic substance is laminated on the upper surface. Further, a transparent electrode 5 formed by low-temperature sputtering or vapor deposition of a transparent conductive material such as indium oxide is formed on one surface of a transparent resin material 4 such as a polyester film cut into a predetermined size. An inner end portion of a plate-shaped lead 7 made of aluminum foil is connected to the back electrode 1 and the transparent electrode 5 by an adhesive tape 6, and the plate-shaped lead 7 is drawn out in the circumferential direction. Further, a transparent resin material 4 is placed on the back electrode 1 so that the light emitting layer 3 and the transparent electrode 5 are in contact with each other to form a laminated body, and the laminated body is composed of a pair of transparent resin skin films 8 and 8A. Sealed by thermocompression bonding, the plate-shaped leads 7 are led out from the resin outer covering films 8 and 8A. Further, the resin outer covering films 8 and 8A have only to be transparent at least on the transparent electrode 5 side.

[0003]

[Problems to be solved by the device]

 In the above-mentioned conventional technique, as shown in FIG. 7, for example, in order to improve the visibility, the back electrode 1 has a ground 1A having an outer contour portion, a ground 1A formed inside the ground 1A, and a ground 1A shown in FIG. A shape pattern composed of the island-shaped ground 1C formed inside is formed, and a predetermined voltage is applied between the transparent electrode 5 and the ground 1A and 1C in FIG. When the display and the negative display are to be performed, in order to pull out the plate-shaped lead 7B connected to FIG. 1B and the plate-shaped lead 7C connected to the island-shaped ground 1C to the circumferential direction respectively, In order to avoid electric contact with the grounds 1A and 1C, at least cutouts 9A and 9B are formed in the ground 1A and part of FIG. 1B, and the plate-shaped leads 7B and 7C are derived from the cutouts 9A and 9B. I have to let you. Therefore, in reality, the positive display and the negative display are performed in the state where the cutouts 9A and 9B are missing, and there is a problem that the display looks very unnatural and gives a feeling of strangeness.

Therefore, an object of the present invention is to solve the above problems and provide a dispersion EL element capable of displaying without a defective portion.

[0005]

[Means for Solving the Problems]

 According to the present invention, a desired shape pattern consisting of a ground, a drawing formed inside the ground, and an island-shaped ground formed inside the drawing is formed on the back electrode, and the back electrode and the transparent electrode are formed. A dispersion EL element that forms a light-emitting layer between the two and press-seals them with a pair of resin skin films, and applies a voltage between the ground and the figure and the transparent electrode to perform a negative display and a positive display. In, the conductors are respectively connected to the island-shaped ground and the figure, the conductors connected to the island-shaped ground are insulated from the figure, and the conductors connected to the figure are insulated from the ground. And is routed to the back side of the back electrode.

[0006]

[Action]

 With the above configuration, the island-shaped ground and the figure are electrically connected to the outside via conductors routed to the back side of the back electrode so that they do not contact each other, and there is no defect. The positive display by the figure and the negative display by the ground are performed.

[0007]

【Example】

 Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. The same parts as those in FIGS. 5 and 6 are designated by the same reference numerals, and the description of the same parts will be omitted.

FIGS. 1 and 2 show an embodiment of the present invention, in which a back electrode 11 has an outer contour portion 11A, a portion 11A formed inside the portion 11A, and an inside portion of FIG. 11B. Then, an "NS" shape pattern composed of the island-shaped ground 11C formed on the above is formed, and the insulating layer 2 and the light emitting layer 3 similar to those in the conventional example are sequentially laminated thereon. On the other hand, on the back side of the back electrode 11, straddling the ground 11A and the island-shaped ground 11C with insulating paint such as vinyl resin paint, acrylic resin paint or polyethylene paint, or insulating tape such as polyvinyl tape. The insulating layer 12A is formed, and the insulating layer 12B is similarly formed between the outer end of the ground 11A and FIG. 11B. One end of a conductor 13C made of a conductive paint or a conductive tape is connected to the island-shaped ground 11C, and this conductor 13C is laid on the insulating layer 12A so as to insulate it from FIG. The end is connected to one end of the ground 11A with an adhesive tape 6, and at the same time, one end of another conductor 13B is connected to FIG. 11B so that the conductor 13B is insulated from the ground 11A and placed on the insulating layer 12B. Draw around. Further, one end of the conductor 13A is connected to the outer end side of the ground 11A, and the conductors 13A and 13B are pulled out in the circumferential direction of the back electrode 11. In this way, the transparent resin material 4 is placed on the back electrode 11 so that the plate-shaped lead 7 connected to the transparent electrode 5 and the conductors 13A and 13B are arranged in the same direction. It is sealed with the resin skin films 8 and 8A. The plate-shaped lead 7 and the conductors 13A and 13B are led out to the outside of the resin covering films 8 and 8A, respectively, so that power can be fed freely.

When a predetermined AC voltage is applied between the plate-shaped lead 7 and the conductor 13B, as shown in FIG. 3, only the portion of FIG. The positive display of the character "NS" is performed from the front of the rum 8. When an AC voltage is applied between the plate-shaped lead 7 and the conductor 13A, as shown in FIG. 4, the island-shaped ground 11C and the ground 11A emit light through the conductor 13C, and the resin cover film. From the front of 8, the negative display of the character "NS" is displayed.

As described above, in the above-described embodiment, the conductor 13C is insulated from FIG. 11B on the back side of the back electrode 11 and is connected between the ground 11A and the island-shaped ground 11C. Is insulated from the ground 11A and connected to FIG. 11B to avoid electrical contact between the grounds 11A and 11C and FIG. 11B. The positive display or negative display is displayed in the absence of light, and the display can be visually recognized very naturally and comfortably.

Further, since the conductors 13A, 13B and 13C are laminated on the back side of the back electrode 11 by the resin covering films 8 and 8A, the conductors 13A, 13B and 13C have almost the same thickness as the conventional dispersion EL element. Moreover, since the conductors 13A and 13B for supplying the voltage to the grounds 11A and 11C and FIG. 11B are all drawn out in the circumferential direction, the connector for the drive circuit is directly inserted into the conductors 13A and 13B. Just by doing so, it becomes possible to easily make an electrical connection with the outside.

The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the present invention. For example, in each of the above-mentioned embodiments, the character “NS” is displayed. Although the pattern is configured as described above, the invention is not limited to the case of characters, but can be similarly applied to the case of displaying a picture, a symbol, or the like having an island-shaped ground inside the figure.

[0013]

[Effect of the device]

 According to the present invention, a desired shape pattern including a ground, a drawing formed inside the ground, and an island-shaped ground formed inside the drawing is formed on a back electrode, and the back electrode and the transparent electrode are formed. Dispersion EL that forms a light emitting layer between electrodes, press-seals them with a pair of resin skin films, and applies a voltage between the ground and the figure and the transparent electrode to perform negative display and positive display. In the device, connect the conductors to the island-shaped ground and the figure, respectively, insulate the conductor connected to the island-shaped ground from the figure, and insulate the conductor connected to the figure from the ground. Thus, it is possible to provide a dispersion EL element that is drawn to the back side of the back electrode and is capable of displaying without a defective portion.

[Brief description of drawings]

FIG. 1 is a rear view showing an embodiment of the present invention.

2 is a sectional view taken along the line AA of FIG. 1 showing an embodiment of the present invention.

FIG. 3 is a positive display pattern diagram showing an embodiment of the present invention.

FIG. 4 is a pattern diagram of a negative display showing an embodiment of the present invention.

FIG. 5 is a partially cutaway plan view showing a conventional example.

FIG. 6 is a partially enlarged sectional view showing a conventional example.

FIG. 7 is a front view of a main part showing a conventional example.

[Explanation of symbols]

 3 Light-Emitting Layer 5 Transparent Electrode 8,8A Resin Skin Film 11 Back Electrode 11A, 11C Ground 11B Fig. 13B, 13C Conductor

Claims (1)

[Scope of utility model registration request] 1. A ground and a drawing formed inside the ground,
A desired shape pattern consisting of island-shaped ground formed inside this figure is formed on the back electrode, a light emitting layer is formed between the back electrode and the transparent electrode, and these are pressed by a pair of resin outer film. In a dispersion EL element that is sealed and performs a negative display and a positive display by applying a voltage between the ground and the figure and a transparent electrode, while connecting a conductor to each of the island-shaped ground and the figure, A dispersion EL element, characterized in that a conductor connected to the island-shaped ground is insulated from the drawing, and a conductor connected to the drawing is insulated from the ground and is drawn to the back side of the back electrode.