JPH10149878A - Manufacture of electroluminescence lamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily provide an electroluminescence lamp provided with lead electrodes, reducing the fitting man-hours of the lead electrodes, and having high position accuracy of the lead electrode at a low cost. SOLUTION: A luminescence layer 2 dispersed with zinc sulfide-based phosphors in a binder is formed on a transparent conductive film 1, a reflecting insulating layer 3 dispersed with a white high dielectric substance such as barium titanate in a binder is formed on it, and a back face electrode 4 is formed to obtain an electroluminescence element 5. For the fitting of lead electrodes 8a, 8b, a conductive thin sheet 6 made of phosphor bronze is fixed astride the back face electrode 4 and the electrode extraction section of the transparent conductive film 1. The conductive thin sheet 6 is fixed, then it is cut and separated into the prescribed lead electrode shapes to form the lead electrodes 8a, 8b, and an electroluminescence lamp 9 is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing an electroluminescent lamp, and more particularly, to a method for attaching a lead electrode and a method for processing.

[0002]

2. Description of the Related Art An organic dispersion type electroluminescent lamp comprises an electroluminescent device comprising a laminate of a transparent electrode, a light emitting layer, a reflective insulating layer and a back electrode, and lead electrodes derived from both electrodes of the electroluminescent device. In general, an AC voltage is supplied to the lead electrode to emit light.

As shown in the perspective view of FIG. 4, a light emitting layer 12 in which a zinc sulfide-based phosphor is dispersed in a binder is formed on a transparent conductive film 11, and a white high dielectric material such as barium titanate is formed thereon. Insulating layer 13 in which is dispersed in a binder
Then, a back electrode 14 made of carbon paste or the like is formed to form an electroluminescent element 15, and as a power supply section, a predetermined shape, a predetermined shape, is previously formed on the electrode take-out section 16 and the back electrode 14 of the transparent conductive film 11. The base ends of the lead electrodes 17a and 17b made of phosphor bronze or the like processed to dimensions are fixed using a conductive adhesive or the like to fix the electroluminescent lamp 2.
Get 0.

In the method of mounting the lead electrodes, since the lead electrode 17a on the transparent conductive film side and the lead electrode 17b on the back electrode side are separately fixed, the positional accuracy of the two lead electrodes may be deviated or the outer shape may be reduced. There is a problem that it is difficult to obtain the positional accuracy from the position. To cope with this, as disclosed in Japanese Patent Application Laid-Open No. 62-122093, both lead electrodes are provided with lead electrodes wider than a predetermined size, and are simultaneously cut into a predetermined position, shape and size when cutting the outer shape. By doing so, the positional accuracy can be ensured.

[0005]

However, even when the above-mentioned wide electrode is attached, a certain degree of positional accuracy is required at the time of attachment. In particular, the lead electrode on the transparent conductive film side and the lead electrode on the back surface electrode side are respectively Since they are fixed separately, there is a problem that the number of steps for mounting the electrodes is not reduced.

[0006]

SUMMARY OF THE INVENTION The present invention has been proposed to solve the above-mentioned problems and to provide an electroluminescent lamp with high lead electrode position accuracy easily and inexpensively.
The method is characterized in that a conductive thin plate is attached across the take-out portions of both electrodes, cut into a predetermined size, and divided into both lead electrodes.

According to the present invention, one conductive thin plate of the same material is collectively fixed over a plurality of lead electrode lead-out portions of the electroluminescent device, cut into a predetermined size, and simultaneously divided into both front and rear electrode leads. Therefore, it is not necessary to increase the positional accuracy when attaching the conductive thin plate, and an electroluminescent lamp with high positional accuracy of the lead electrode can be provided easily and inexpensively with a small number of steps.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An electroluminescent lamp and a manufacturing method according to the present invention are directed to an electroluminescent lamp in which lead electrodes are derived from both electrodes of an electroluminescent element comprising a laminate of a transparent electrode, a light emitting layer, a reflective insulating layer, and a back electrode. Is manufactured by fixing a single conductive thin plate of the same material over both electrode take-out portions, cutting it to a predetermined size, and dividing it into front and rear electrode leads.

When the transparent conductive film and the light emitting layer are thermocompression-bonded, a slit is formed in this single conductive thin plate in advance, and a laminate composed of a back electrode, a reflective insulating layer and a light emitting layer is attached to the slit. The one end of the conductive thin plate is sandwiched between the light emitting layer and the transparent electrode, and the other end of the conductive thin plate is thermocompressed as a whole in a state of being in contact with the back electrode, thereby attaching the conductive thin plate over both electrodes. It is characterized by:

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the electroluminescent lamp according to the present invention will be described with reference to FIG. The electroluminescent lamp of the present invention
As shown in the perspective view (a) of FIG. 1, first, on a transparent conductive film 1 in which an electrode lead-out part 7 is formed on a transparent electrode with a silver paste or the like, zinc sulfide is removed except for a lead-out part 7 of a transparent electrode side lead electrode. A light emitting layer 2 in which a base phosphor is dispersed in a binder is formed by printing, and a reflective insulating layer 3 in which a white high dielectric substance such as barium titanate is dispersed in a binder in the same shape is formed by printing. An electroluminescent device 5 is obtained by printing and forming a back electrode 4 made of paste. Next, about the installation of the lead electrode, phosphor bronze, nickel,
One conductive thin plate 6 made of a tin-plated iron plate or the like is fixed over the back electrode 4 and the electrode take-out portion 7 of the transparent conductive film 1. The fixing method is generally performed using a conductive adhesive (for example, FH889 manufactured by Fujikura Kasei). After the conductive thin plate 6 is fixed, the broken lines in the perspective view (b) of FIG. 1 are cut at once, thereby simultaneously forming the divided lead electrodes 8a and 8b as shown in the perspective view (c). The thin electroluminescent lamp 9 is obtained. As a result, the lead electrodes, which were conventionally separately mounted on the back electrode and the transparent electrode, respectively, can be collectively mounted with one material, and can be mounted without concern for positional accuracy. Man-hours can be significantly reduced. Further, the positional accuracy and the shape of both lead electrodes can be easily and accurately formed by performing the cutting at the same time as the outer shape cutting. As a cutting means, a general method such as a Thompson blade, a laser, or a punching die can be used.

In the second embodiment, as shown in FIG. 2, even in the case where a plurality of electroluminescent lamps are used, a single long electrode material is formed similarly to the first embodiment. it can.
As shown in the plan view (a) of FIG. 2, a back electrode 4 is formed on a reflective insulating layer 3 and then a single conductive thin plate 6 made of phosphor bronze or the like is connected to all the switching elements ( 2 (four in FIG. 2) and the rear electrode 4 and the electrode take-out portion 7 of the transparent conductive film. Next, as shown in the plan view (c) of FIG. 2, the divided lead electrodes 8 are cut by cutting the broken line portions in the plan view (b) of FIG.
a, 8b are formed in each of a large number of electroluminescent lamps 9,
9 at the same time.

Next, a third embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIG. In this embodiment, lead electrodes are collectively formed in an electroluminescent lamp in which a transparent electrode and a light emitting layer are thermocompression-bonded. In FIG. 3A, reference numeral 1 denotes a transparent conductive film in which a transparent electrode such as ITO is formed on a transparent film. Reference numeral 10 denotes a reflective insulating layer 3 formed on a back electrode 4 such as aluminum, on which light is emitted. It is a laminate in which a layer 2 is formed. Reference numeral 6 denotes a conductive thin plate made of a phosphor bronze, nickel, tin-plated iron plate or the like, and a slit 6a which is open at one end is formed in a part thereof.

As shown in FIG. 3 (b), the laminate 10 is mounted on the slit 6a of the conductive thin plate 6, one end 6b partitioned by the slit 6a of the conductive thin plate abuts on the light emitting layer 2, and the other end. 6c is brought into contact with the back electrode 4, a transparent conductive film 1 is applied so as to extend over one end 6b of the conductive thin plate and the upper surface of the light emitting layer 2, and thermocompression-bonded in the direction of the arrow.

The laminated body after the thermocompression bonding is cut as shown by the broken line in the plan view of FIG. 3C so that the 6b portion and the 6c portion are separated from each other, thereby dividing the laminate as shown in FIG. 3D. An electroluminescent lamp having the lead electrodes 8a and 8b thus obtained is obtained.
A conductive adhesive is used to fix the conductive thin plate to the back electrode, the light emitting layer, the transparent electrode, and the like. The width of the slit 6a is larger than the thickness of the laminate, and the distance l between the leads 8a and 8b is
Must be smaller than If the thickness is smaller than the thickness of the laminate, the laminate cannot be mounted on the slit, and if it is larger than the interval 1, a predetermined lead electrode interval 1 cannot be obtained.

[0015]

According to the present invention, a single conductive thin plate of the same material is fixed to the lead electrode take-out portion of the electroluminescent device at a time, cut into predetermined lead electrode dimensions, and divided into front and rear lead electrodes. Therefore, there is no need to increase the positional accuracy at the time of mounting, and it is possible to easily and inexpensively provide an electroluminescent lamp with high lead electrode positional accuracy.

[Brief description of the drawings]

FIG. 1 is a perspective view of an electroluminescent lamp according to a first embodiment of the present invention. (A) Before attaching an electrode material (b) Before cutting after attaching an electrode (c) After cutting

FIG. 2 is a plan view of an electroluminescent lamp according to a second embodiment of the present invention. (A) Before mounting electrode material (b) Before cutting after mounting electrode material (c) After cutting

FIG. 3 is a perspective view and a plan view of an electroluminescent lamp showing a third embodiment of the present invention. (A) Before mounting electrode material (b) Before cutting after mounting electrode material (c) Plan view showing cutting position (d) ) After cutting

FIG. 4 is a perspective view of a conventional electroluminescent lamp.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Transparent conductive film 2 Light emitting layer 3 Reflective insulating layer 4 Back electrode 5 Electroluminescent element 6 Conductive thin plate 6a Slit 6b, 6c End part 7 Electrode extraction part 8a, 8b Lead electrode 9 Electroluminescent lamp 10 Laminated body

Claims (4)

[Claims] 1. A method for manufacturing an electroluminescent lamp in which a light-emitting layer and a reflective insulating layer are provided between a transparent electrode and a back electrode, and lead electrodes are respectively derived from the two electrodes. A method for manufacturing an electroluminescent lamp, comprising attaching a conductive thin plate, and then cutting the conductive thin plate to divide it into both lead electrodes. 2. A transparent electrode side lead electrode lead-out portion is formed on the transparent electrode, and a light emitting layer, a reflective insulating layer, and a back surface electrode are sequentially formed in a layer other than the lead portion, and a part of the back surface electrode is formed. The method for manufacturing an electroluminescent lamp according to claim 1, wherein a conductive thin plate is attached to the transparent electrode side lead electrode take-out portion. 3. An electrically conductive thin plate is provided with a slit having an opening at one end, and a laminated body comprising a back electrode, a reflective insulating layer and a light emitting layer is mounted on the slit, and one end of the conductive thin plate is connected to the light emitting layer and the transparent electrode. 2. The electroluminescent lamp according to claim 1, wherein the conductive thin plate is attached across both electrodes by abutting the other end of the conductive thin plate against a back electrode and thermocompression bonding. Production method. 4. The width of the slit formed in the conductive thin plate is larger than the thickness of the laminated body composed of the back electrode, the reflective insulating layer, and the light emitting layer, and smaller than the distance between both lead electrodes. 3. The method for manufacturing an electroluminescent lamp according to item 1.