JPH03216995A - Manufacture of electroluminescence lamp - Google Patents

Abstract

PURPOSE:To easily manufacture a specific-shaped electroluminescent lamp having a bore part by arranging in the bore part a dummy plate having the same thickness as an electroluminescence element and an area for ensuring a sufficient seal path length, and sealing the element with an external covering film at the same time, when the electroluminescence element having the bore part is sealed. CONSTITUTION:An electroluminescence element 35 comprising a lamination body of a rear electrode 25, a reflective insulation layer 26, a luminous body 27 and a transparent electrode 28 is formed by leading out leads 22, 23 from the rear electrode 25 and the transparent electrode 28, and the element 35 after the forming is bored together with an outer shape machining by a shape-cutter. When the electro-luminescence element 35 having a bore part 40 is sealed, a dummy plate 41 having nearly the same thickness as the element 35 is positioned in the bore part 40, and sealed by external covering films 31, 32 at the same time. Accordingly, a sealing process of the specific-shaped electroluminescence element 35 having the bore part 40 can be performed similarly to that of a conventional rectangular shape electroluminescence element, thus facilitating manufacture of the unusual-shape electroluminescence lamp having the bore part 40.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing an electroluminescent lamp, and more particularly to an electroluminescent lamp having a perforation and a method for manufacturing the same.

As shown in FIG. 6, the Gensha electroluminescent lamp is manufactured by attaching an electroluminescent element 1 having a substantially rectangular planar shape made of a laminate described later with leads 2 and 3 made of phosphor bronze etc. It has a structure that is hermetically sealed with moisture-proof outer skin films 4 and 5 made of resin or the like. The electroluminescent device 1 consists of, in order from the bottom, a back electrode 6 made of aluminum foil, a reflective insulating layer 7 made of an organic binder dispersed with an insulator such as barium titanate, a light emitting layer 8 made of dispersed phosphor, and a transparent layer made of ITO or the like. An electrode 9 and a transparent plastic film 10 serving as its base material are laminated. Incidentally, IL 12 in the figure is a moisture-absorbing film made of nylon (trademarked by DuPont, hereinafter referred to as nylon) placed above and below the electroluminescent element 1. The lead 2 of the back electrode 6 has an adhesive tape 12 attached to one end of the bottom surface of the back electrode 6.
It is temporarily fixed with the outer skin films 4 and 5, and is sandwiched and fixed with the moisture absorbing film 12 by sealing the outer skin films 4 and 5. Further, the lead 3 of the transparent electrode 9 is temporarily fixed to one end of the transparent conductive film on the ITO side with an adhesive tape 13, and is sandwiched and fixed between the light emitting layer 8 by sealing the outer films 4 and 5, and then led out.

By the way, some electroluminescent lamps with the above structure are provided with perforations as shown in Figure 7 for applications such as watches and various dials, and in the manufacturing method, the electroluminescent element is sealed with an outer film. When doing so, since there are perforations inside the electroluminescent device, the outer film shrinks due to heat and pressure during sealing, making the device easily deformed, making it extremely difficult to manufacture.

One...
゛The present invention comprises a step of forming an electroluminescent device consisting of a laminate of a back electrode, a reflective insulating layer, a light emitting layer and a transparent electrode by leading out leads from the back electrode and the transparent electrode, and a step of forming the electroluminescent device after forming the electroluminescent device. , a step of perforating the outer shape with a mold blade, and a step of placing a dummy plate with approximately the same thickness as the electroluminescent element in the perforation when sealing the electroluminescent element having these perforations, and simultaneously sealing with an outer skin film. It is characterized by easily forming an electroluminescent lamp having a perforation.

■ According to the present invention, it is possible to perform the sealing process for an irregularly shaped electroluminescent element having a perforation in the same way as for a general rectangular electroluminescent element, and it is possible to easily seal an irregularly shaped electroluminescent element having a perforated part. Can produce electroluminescent lamps.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of an electroluminescent lamp and a method for manufacturing the same according to the present invention will be described with reference to FIGS. 1 to 5.

In FIGS. 1 and 2, reference numeral 21 denotes an electroluminescent lamp having a substantially rectangular planar shape made of a laminate described later; 22, 23;
is a lead made of phosphor bronze or the like derived from the back electrode and transparent electrode of the electroluminescent lamp 21, which will be described later.

The electroluminescent element 35 consists of, in order from the bottom, a back electrode 25 made of aluminum foil, a reflective insulating layer 26 made of an organic binder dispersed with an insulator such as barium titanate, a light emitting layer 27 made of dispersed fluorescent material, ITO, etc. It is made by laminating transparent conductive films 28. In the figure, reference numerals 29 and 30 are moisture-absorbing films made of nylon (trademarked by DuPont, hereinafter referred to as nylon), which are placed above and below. Lead 22 of the back electrode 25
is temporarily fixed to one end of the lower surface of the back electrode 25 with an adhesive tape 33, and is fixed by being sandwiched between the moisture absorbing film 30 and the outer skin film 3L32. Further, the lead 23 of the transparent electrode 28 is temporarily fixed to one end of the transparent conductive film on the ITo side with an adhesive tape 34, and is sandwiched and fixed between the light emitting layer 27 by sealing with the outer film 3L32.

Here, the electroluminescent element 35 is cut into predetermined dimensions using a mold blade as shown in FIG. 3, and at the same time, a perforation 40 is provided at a predetermined location of the element. Then, as shown in FIG. 4, first, a positioning line 48 is provided on the laminating table 42 in advance, and
Using this as a guideline, make sure that the lower skin film has the same thickness as the electroluminescent element and has a sufficient seal path length (experimentally, it is 4 mm or more).
0 mm or less) is temporarily fixed with double-sided tape or the like, and the electroluminescent element 35 is positioned so that the dummy plate 41 is placed inside the perforation.
After temporarily sealing with impulse sealer 47, sealing is performed with an outer skin film. At this time, if the perforation has a seal path length of 4 mm or more, there will be no problem with the sealing performance. Further, the dummy plate 41 is removed when cutting the outer skin film to a predetermined size.

By inserting a dummy plate into the perforation in this way, an electroluminescent lamp can be easily produced without shrinkage of the outer film due to heat, pressure, etc. during sealing with a laminating roll or the like, and without deformation of the electroluminescent element. be able to.

Next, a second embodiment will be explained. FIG. 5 is a sectional view of a dummy plate used in the second embodiment. In this way, by using a dummy plate in which the fluororesin 49 having the same thickness as the electroluminescent element and the adhesive layers 50 and 51 are provided on both sides, a seal path length of 4 mm to 10 mm is provided at the perforated portion as in the first embodiment. This is not necessary, the positioning of the perforation is easy, and the sealing performance is further improved.

According to the present invention, when sealing an electroluminescent element having a perforated part, a dummy plate having the same thickness as the electroluminescent element and an area that can ensure a sufficient sealing bath length is placed in the perforated part. At the same time, by sealing with an outer skin film, it is possible to easily manufacture an irregularly shaped electroluminescent lamp having a perforated portion.

[Brief explanation of drawings]

FIG. 1 is an enlarged sectional view of a main part showing an electroluminescent lamp according to the present invention, and FIG. 2 is a plan view of FIG. 1. FIG. 3 is a plan view of a mold blade for cutting an electroluminescent element, FIG. 4 is a schematic diagram showing a method for sealing an electroluminescent lamp according to the present invention, and FIG. 5 is a cross section of a dummy plate used in the second embodiment. It is a diagram. FIG. 6 is a sectional view of a conventional electroluminescent lamp, and FIG. 7 is a plan view of various electroluminescent lamps having perforations. 22.23...Lead, 25...Back electrode (aluminum foil), 26...Insulating layer, 27...Light emitting layer, 28...Transparent electrode (transparent conductive film), 29, 30... - Moisture absorption film, 31, 32... Outer skin film, 40... Perforation part, 41... Dummy board. 33 3] 32 ・ Desired 1・Zaichifu 1 -\40 IJ
L 40 Perforation 41 Tie handling 42 Fumikito stand 45.46' 9γ1 Y roll 47'
In Igu! Resshifu 48, aH4 Siri 7a

Claims (1)

[Scope of Claims] Scope of Patent Registration Claims An electroluminescent device consisting of a laminate of a back electrode, a reflective insulating layer, a light emitting layer and a transparent electrode is provided with perforations to lead out leads from the back electrode and the transparent electrode to form an outer film. A method for manufacturing an electroluminescent lamp, the method comprising the step of: arranging a dummy plate in the perforation and sealing the electroluminescent element at the same time as the electroluminescent element.