JPS60208086A - Method of producing electroluminescent plate having partitioned light emitting surface - 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 a method for manufacturing an electroluminescent plate (hereinafter abbreviated as EL plate) in which a light emitting surface is divided into a desired number of sections.

An EL plate usually has the cross-sectional structure shown in Figure 1, and is roughly divided into a transparent electrode layer (11), a fluorescent layer (11), and a fluorescent layer (11).
2) , a back electrode (13), and the transparent electrode layer (11) includes a substrate layer (14), a conductive layer (15), and an auxiliary electrode (16) provided along one side of the conductive layer. ). Note that an insulating layer may be provided between the fluorescent layer (12) and the back electrode (13) if necessary, but this is omitted in this figure.

Group 11Q4) U Usually a plate of synthetic resin such as polyester or inorganic solid solution such as glass, and conductive N
(15) is tin oxide Sφ2 or indium oxide l3
It is a vapor deposited layer of 203 or a mixture of 5302 and 1 is 203 (usually abbreviated as ITO).

The auxiliary electrode (16) is an electrode that prevents charge from concentrating on the terminal portion of the conductive layer (15) and enables uniform voltage application to the layer, and is usually made of a conductive material such as silver powder. It is a paste-like material in which synthetic metal powder is mixed into a synthetic resin such as epoxy resin I]d. As mentioned above, this electrode is conductive 1!
It is applied and formed by a method such as printing on the position [) on the − side of r(16)].

The fluorescent layer (12) is a coated film layer in which a fluorescent substance such as zinc sulfide Z, S or cadmium sulfide CdS is dispersed in a resin, and the company's usual screen printing method is used for this coating. It will be done.

A back electrode (13) is a thin film of metal such as aluminum M and is pressed onto the fluorescent layer (12) using a Shimada rule or the like.

The EL board (10) having such a structure can be
Although it is guaranteed that the cover (19) is made of a transparent and insulating synthetic resin, if an AC voltage is applied between the auxiliary electrode (16) and the back electrode, the fluorescent layer (12)
The fluorescent substance is excited, and the entire surface of the fluorescent layer emits light.

As mentioned above, the use of EL plates is rapidly expanding due to the advantages that they are surface light emitters and that AC power is sufficient for light emission. However, depending on the application, it may be possible to emit light from the entire surface of the board, or it may be sufficient to emit light from only a limited portion of the board.

To make such a board that can emit light partially, it would be possible to connect multiple independent EL boards, but this would require a complicated number of steps and inevitably result in a high product price. Therefore, the conventional method is to divide the back electrode layer (13) into a desired number of sections and take a lead wire from each section, or to divide the back electrode layer (13) into the conductive layer (15) of the transparent electrode layer (11). On the upper surface, a narrow band-like pattern with a width that forms the dividing line is divided by etching, and auxiliary electrodes are provided on the appropriate sides of each divided section, and a fluorescent layer (1
2) was coated and printed. In the former case, since it is a fraction of the back electrode, which is a metal foil, there is an inherent ψ which reduces the strength of the EL plate, and in the latter case, the number of steps is still large and the cost is high. This is a drawback of the conventional method.

The present invention aims to improve the above-mentioned difficulties, and includes:
As shown, the conductive layer (15) in the transparent conductive & layer (11)
) by using a sharp edge such as a knife, cutter, etc.
0A), and avoid this dividing line to connect the auxiliary electrode (16a
, 16A) by the above-described means, and then a phosphor layer (12) and a back electrode (13) are applied in that order over the entire surface of the conductive WLWJ (15) including the dividing line. It is characterized by:

In the above division, in the case of Fig. 2, one division line (1
7) Convert one rectangular EL board (10) into two vertically long EL
Figure 3 shows the case where the plates (10a, 10A) are divided into two horizontally long sections by an L-shaped dividing line. There are no limitations on the shape or number of fractions. It is obvious that it can be selected arbitrarily.

Note that it is natural to attach the -J' wires (18a, 18A) to the edges of the auxiliary electrodes, and the method is not particularly different from the conventional method. Since the EL board itself is usually a thin sheet-like plate, the lead wire attached to it is made of phosphor bronze with a thickness of about 100 μm and a width of 1′.
It is a narrow strip of about ll11. Therefore, if these lead wires are connected to the lead wires attached to the back electrode (13) (not shown) and a power supply, switch, etc. are interposed between them, the entire surface of the EL board, or within the divided sections, can be Individuals can be made to emit light.

Since the present invention is constructed as described above, it can be produced much more easily and inexpensively than conventional EL plates having fractionated light emitting surfaces, and the product has excellent mechanical strength.

[Brief explanation of the drawing]

FIG. 1 is a partial cross-sectional view of a portion including an auxiliary electrode of an electroluminescent plate manufactured by the method of the present invention, and FIG.
3 and 3 are front views of an electroluminescent plate according to an embodiment of the present invention. 10: Electroluminescent plate, 11: Transparent electrode layer, 12: Fluorescent layer, 13: Back electrode, 14: Substrate layer,
15: Conductive layer, 16 (a, b): Auxiliary 1! Polar, 17: Parting line, 18: Lead line, 19: Cover Applicant Daikin Industries, Ltd. Attorney Mibuya Doishima (and 1 other person)

Claims (1)

[Claims] By using an edge, the conductive layer (15) in the transparent electrode layer (11) is divided into a predetermined fraction number (10a,
l0A), and this division! Attach the auxiliary electrode (16) avoiding (17), and then divide M (17)
A fluorescent layer (12) and a back electrode (
13) A method for producing an electroluminescent plate with a fractionated light emitting surface, characterized by laminating the following in that order: