JPS6134892A - Method of producing electroluminescent element - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] The present invention relates to an electroluminescent device (hereinafter referred to as E'L
D), particularly its overall structure.

(Background of the Invention) ELD is a device that utilizes the light emission phenomenon caused by applying voltage to a light emitting layer such as ZnS in which manganese is diffused.
known as.

FIG. 1 is a cross-sectional view of a conventional flexible dispersion type ELD.

In FIG. 1, l is a light emitting part, and this light emitting part 1 is formed of a four-layer structure including a lower electrode 2, a light emitting layer 3, and a transparent electrode 4.

The lower electrode 2 is formed of, for example, metal powder such as silver dispersed in an organic polymer or inorganic binder, or metal foil or thin metal film of aluminum, copper, or the like.

The light-emitting layer 3 is formed by dispersing a phosphor powder in which ZnS is doped with an activator such as copper or manganese and an activator such as chlorine in an organic polymer binder. There are also those using elements such as monovalent metals, transition metals, etc.

The transparent electrode 4 is formed of a thin film of metal oxide such as InzO3 or SnOz, a thin film of gold or palladium, or a thin film of metal such as aluminum or copper in which small mesh-like holes are formed.

A moisture-proof water replenishing layer 5 made of a hygroscopic film is provided below the lower electrode 2 of the light emitting part 1 to form a five-layer structure.
The five-layer light emitting part 1 and the moisture-proof water replenishing layer 5 are covered with a protective sealing material (Lamiho 1 to
The protective sealing materials 6 and 6 were heat-sealed or sealed 7 with an adhesive or the like to form a moisture-proof structure.

By the way, in such a conventional ELD, the light emitting section 1
Since it is flat (band-shaped) as a whole, including the , it cannot be bent into any shape, and therefore has the disadvantage that it cannot provide a unique display as a light emitting body.

For example, it is not possible to perform a display in which alphabetical characters are emitted as shown in FIG.

Therefore, it has the disadvantage that its applications are extremely limited.

[Purpose of the invention]

The object of the present invention is to eliminate the drawbacks of the above-mentioned prior art.

Highly flexible ELD that can be bent into any shape
To provide a manufacturing method.

[Summary of the invention]

To achieve this objective, the present invention passes a conductor wire with an insulating layer on its surface through a luminescent liquid tank, a transparent electrode deposition tank, and a moisture-proof coating liquid tank in this order, and a drying process is inserted between each step. The points are distinctive.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the drawings.

First, the ELD structure of the present invention will be explained.

FIG. 2 is an external view showing the light emitting state of the ELD according to the present invention.

The ELD 8 has a highly flexible structure in the form of a thin rod, with a conductor wire 9 in the center and a transparent electrode layer 12 easily connected to an AC power source 15.
When an AC voltage is applied, the moisture-proof coating layer 13 on the outer surface
Through this, light from the light emitting layer 11 shown in FIG. 3 is irradiated outward.

FIG. 3 is a longitudinal sectional view of the ELD 8 according to the present invention, and as shown in FIG. A highly flexible linear conductor wire 9 is provided at the center, and an insulator layer 10 and a light emitting layer 1 are arranged outwardly of the conductor wire 9 in order.
1. Transparent electrode layer 12. A moisture-proof coating layer 13 is formed as a covering.

FIG. 4 is an external view showing the state of each of these coating layers.

In this figure, reference numeral 14 denotes a sub-wire wound around the outer surface of the transparent electrode layer 12, which together with the conductor wire 9 constitutes a pair of electrodes.

That is, the AC power source 15 includes the conductor wire 9 and the transparent electrode layer 12.
Although it was explained in FIG. 2 that it is connected to the sub line 14, specifically, it is connected to the sub line 14.

Note that this lil'l wire 14 may be wound around the outer surface of the light emitting body M11 in the lower layer of the transparent electrode ff1.2, that is, the back surface of the transparent electrode layer 12. In short, it is sufficient that it is electrically connected to the transparent electrode layer 12.

This dividing line j4 is not an essential requirement for configuring an ELD, but by providing it, the transparent electrode layer 1
It is possible to apply a voltage uniformly to both.

Further, by using this sub-line 14, it functions as a second lead line, so that the wiring and connection methods are the same as those for ordinary LEDs and lamps, and the efficiency of use is extremely high.

Note that when an iron-aluminum wire whose surface is alumite-treated is used as the core wire, the insulating coating layer may be unnecessary.

Since the ELD according to the present invention constitutes a linear light emitter that can be bent freely as described above, for example, as shown in FIG.
It can be formed using D8 and emit light. In addition, 16
is a display board.

Next, a method for manufacturing an ELD according to the present invention will be explained based on FIG.

In the figure, 17 is a conductor wire drum, and the conductor wire 9 wound around this drum is first immersed in an insulation coating liquid tank 18, and then entered into an upper drying chamber 25 by a pulley 28 and dried.
The light emitting material is immersed in the liquid bath 19 again, and further carried into the drying chamber 25 by the pulley 29. Next, transparent electrode deposition tank 2
At step 0, a transparent electrode is applied to the outer circumferential surface, and then moved by a pulley 30 to a drying chamber 26 partitioned by a frame again.
The secondary wire twisting material is carried into the container 22 from the pulley 31 above the wire. Here, it is paid out from the sub-line drum 21, and the pulley 32
The product is twisted and connected to the secondary wire 14 brought in via the pulley 33, and then goes to the moisture-proof coating liquid tank 23 again, and finally enters the drying room 27 by the pulley 34, from where it is wound onto a finished product winding drum. and leave.

The electroluminescent device is completed through the above steps, but since the line-emitting electroluminescent device manufactured in this way has a structure similar to a conventional shielded wire, it is cut to the desired length, and the @ moisture-proof The coat can be peeled off and the two electrode leads, the conductor wire and the sub wire, can be taken out and used for wiring.

Incidentally, when using an aluminum wire whose surface has been anodized as the conductor wire, the insulation coating liquid tank 18 may be unnecessary.

[Function and effect of the invention]

As explained above, according to the present invention, the ELD can be manufactured into a highly flexible thin bar (wire) instead of the conventional flat plate, so it can be bent freely.
Therefore, it can be used as a light-emitting display for a wide range of applications, such as English letters with many curved parts, and it is possible to provide an electroluminescent device with excellent functionality, except for the drawbacks of the prior art.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view of a conventional ELD; Fig. 2 is an external view showing the light emitting state of the ELD of the present invention; Fig. 3 is a longitudinal sectional view thereof; Fig. 4 is a longitudinal sectional view of each coating layer. FIG. 5 is a diagram showing an example of a usage mode, and FIG. 6 is a process diagram showing an ELD manufacturing method according to an embodiment of the present invention. 9...Conductor wire, 11...Light emitter layer, 1
2... Transparent electrode layer, 13... Moisture-proof coating layer 19... Luminescent liquid tank, 20... Transparent electrode vapor deposition tank, 23...・Moisture-proof coat tank, 25,
26, 27...Drying room, 35...1st
Figure 2 Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] A light emitter layer, a transparent electrode layer, and a moisture-proof coating layer are sequentially formed outward on the outer periphery of a thin flexible conductor wire whose surface has been subjected to a wire-break treatment, and an alternating current voltage is applied between the conductor wire and the transparent electrode layer. A method for producing an electroluminescent device that forms a line luminescent material, in which a conductor wire fed out from a drum and having an insulating layer on its surface is placed in a luminous material liquid tank, a transparent electrode deposition tank, and a moisture-proof coating liquid tank. A method for manufacturing an electroluminescent element, characterized in that the device is passed through a drying chamber in succession between each tank, and is finally wound onto a finished product winding drum.