JPS6039790A - Organic el - 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 Technical Field The present invention relates to an organic EL, and more particularly to an improvement in its terminal structure.

Background Art 11CL basically has a structure in which an electroluminescent layer that emits light is sandwiched between a pair of electrodes, at least one of which is transparent. This KLVc is conventionally broadly classified into inorganic type (or enamel type) and organic type (or plastic type).

The latter has advantages over the former in that it is thinner, lighter, and has higher brightness, and the latter has been more popular recently.

FIG. 1 shows a partially cutaway plan view of this type of organic EL, and FIG. 2 shows a sectional view taken along line nu in FIG. 1. In the figure, 1 is a KL element, this KL element 1 is sandwiched from above and below by two transparent resin outer films 2゜3, and the peripheral parts of both outer films 2゜3 that protrude from the EL element 1 are sealed by thermocompression bonding. has been done. Said EL element 1
consists of a transparent resin film 4, a transparent conductive film 5, a current collecting band 6 formed in, for example, an L-shape around the transparent conductive film 5, and a current collecting band 6 electrically connected to the current collecting band 6 and connected to the outside. a portion 7, a light emitting layer 8, a reflective insulating layer 9, and a back electrode layer 1.
0 and a portion 11 electrically connected to this back electrode layer 10.

The above KL is manufactured, for example, as follows. First, as shown in FIG. 3, a transparent conductive film in which a transparent conductive film 5 is formed on a transparent resin film 4 is prepared, and a conductive paste is applied on the transparent conductive film 5 in an L-shape to form a current collecting band 5. A lead 7 made of a thin phosphor bronze plate is attached to the current collecting band 6.
to be electrically and mechanically connected and fixed. On the other hand, as shown in FIG. 4, a reflective insulating layer 9 made of an organic dielectric mixed with white insulating powder is formed on the back electrode layer 10 made of aluminum foil. A light emitting layer 8 in which a fluorescent material is dispersed in a dielectric material is formed, and a lead 11 is electrically and mechanically connected and fixed to the back electrode layer 10.

Then, the structure shown in FIG. 3 and the structure shown in FIG. 4 are integrated by pressure bonding with the surfaces of the transparent conductive film 5 and the light emitting layer 8 as shown in FIG. A FiL element l is obtained.

Next, as shown in FIG. 7, this EL element 1 is sandwiched between two resin outer films 2 and 3 at a predetermined interval, and passed through between the thermocompression rollers.
When the peripheral portion protruding from the EL element 1 is sealed by thermocompression bonding and cut along the dashed line 13 shown in the figure, it becomes m as shown in FIG.
L14 is obtained. The three sides 14a, 14b, 14c of the EL14 glue portions 7, 11 other than the direction in which they are drawn out can be cut into a straight line, but one side 14d in the direction in which the lead 7.110 is drawn out cannot be cut, so they tend to become meandering. For this reason, it was difficult to manufacture ELI7) with high dimensional accuracy.

In addition, in the structure for pulling out the lead 7.11 as shown in item 2, in the crimping process shown in FIG. 5 or the thermocompression sealing process shown in FIG. A thermocompression roller is required, which not only increases equipment costs, but also has the disadvantage that the leads 7 and 11 are easily moved or bent.

DISCLOSURE OF THE INVENTION Therefore, the present invention provides an organic KL with high dimensional accuracy and ease of manufacture.

In summary, the present invention provides an internal terminal in a portion of the EL element protruding from the EL element between the resin outer films, and penetrates the resin outer film from the outside of the resin outer film to connect the internal terminal with an electrical device. In other words, the organic type KL of the present invention is characterized in that it is provided with an external terminal that is subject to wear and tear.0 In other words, the organic type KL of the present invention does not require a long lead to be electrically and mechanically connected to the EL element. In addition, the pressure roller that only connects and secures short and small internal terminals requires a much smaller width than conventional ones.Also, when sealing the KL element with thermocompression with the resin outer film, the leads are Since there is no protrusion 1, the width of the thermo-compression roller can be much smaller than before, which reduces equipment costs.Roughly,
Since the internal terminals do not protrude beyond the resin outer film, the leads do not move or bend as in the conventional case. Since the edges of the KL can also be cut and shaped, an organic KL with high dimensional accuracy can be obtained.

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 9 shows a partially cutaway plan view of the organic EL of the present invention, FIG. 10 shows an exploded cross-sectional view taken along the line X-X in FIG. 9, and FIG. An enlarged sectional I-view of the main part along the line XX is shown.

The figure is similar to FIGS. 1 and 2 except for the following points, and the same or corresponding parts are designated by the same reference numerals. The difference from FIGS. 1 and 2 is that the leads are not led out directly from the transparent conductive film 5 and the back N-pole layer 10, but the short internal terminals 15 and 16 are all electrically and mechanically connected and fixed. The periphery of the resin outer film 2.3 is sealed by thermocompression so that the entire internal terminals 15.16 are hidden, and the 12th As shown in the figure, the claw portions 17a, 17a, 18a, 18 of the external terminals 1'7, 18
The internal terminal 15.16 and the external terminal 1'7.18 are electrically and mechanically connected and fixed by penetrating the terminal a and bending it on the back surface.

The above organic EL is manufactured as follows.

First, as shown in FIG. 13, a transparent conductive film 5 in which a transparent conductive film 5 is entirely formed on a transparent resin film 4 is prepared, and a conductive paste is applied on the transparent conductive film 5 in an L-shape at predetermined intervals. Electrical bands 6 are formed, and internal terminals 15 are electrically and mechanically connected and fixed at predetermined positions on each current collecting band 6.

Next, as shown in FIG. 14, a reflective insulating layer 9' and a light emitting layer 8 are laminated on the back electrode layer 10 made of aluminum foil, and internal terminals 16 are formed at predetermined intervals on the lower surface of the back electrode layer 10. Fix the connection electrically and mechanically.

After this, as shown in FIG. 15, the structure shown in FIG. 13 and the structure shown in FIG. become Then, by cutting along the dashed line 19 shown in the figure, the EL element 1 as shown in FIG. 16 is obtained. Note that the internal terminals 15 and 16 may be connected and fixed in the crimping process shown in FIG. 15, and the internal terminals 16 in particular may be connected and fixed after being crimped and integrated or after being cut.

Next, as shown in FIG. 17, this KL element l is placed between two long resin outer films 2 and 3 at a predetermined interval, and passed through a thermocompression roller to form an E of the resin outer films 2 and 3.
'The peripheral portion protruding from the L element 1 is sealed by thermocompression.

The crimping process shown in FIG. 15 and the thermocompression sealing process shown in FIG. Since no nodes are led out and only short internal terminals 15 and 16 are provided, the pressure roller and thermocompression roller need be much smaller in width than conventional ones.

Furthermore, the internal terminals 15 and 16 do not move or bend. Next, the internal terminals 15 of the resin outer films 2 and 3 are connected.
The peripheral edge on the 16 side is cut and removed by a predetermined dimension, and the claw portion 1'7a of the external terminal 1'7.
, 18a are passed through the internal terminals 15 and 16 and bent on the back side of the resin outer film 3, thereby forming the external terminal 1.
Connect and secure 7.18 to internal terminal 15.16.

Finally, by cutting along the dashed line 20 shown in the figure, the EL 14 shown in FIG. 18 is obtained.

Note that the external terminals 17 and 18 may be connected and fixed after cutting from the dashed line 20.

The organic ETJ of the present invention manufactured as described above does not require integral crimping or thermocompression sealing with long leads connected and fixed, so mass production is improved and the reliability of thermocompression sealing is improved. It also improves. Furthermore, since the external terminals are attached after thermocompression sealing, there is no limit to the board thickness, and the board thickness can be made larger than before, which not only improves the strength and prevents lead bending, but also prevents the external terminals 17. 18 can also be directly inserted into a socket and connected to an external circuit.

Note that the thickness of the internal terminal 1 is smaller than that of the external terminals 17 and 18.
5. If the plate thickness of 16 is made sufficiently small, the external terminal 17
．． The claws 17a and 18a of 18 are directly connected to the internal terminals 15 and 16.
However, if necessary, please connect internal terminal 1 in advance.
Cuts or the like for insertion of the claw portions 17a and 18a may be formed in 5.16.

[Brief explanation of drawings]

Figures 1 and 2 show conventional organic type KL;
The figure is a partially cutaway plan view, Figure 2 is the same as Figure 1] -■
It is a sectional view along a line. FIGS. 3 to 8 are plan views of each stage for explaining the method for manufacturing the EL. 9 to 11 show organic type KL of the present invention,
Fig. 9 is a partially cutaway plan view, Fig. 10 is an exploded cross-sectional view taken along the line X-X in Fig. 9, and Fig. 11 is an M--
FIG. 3 is an enlarged cross-sectional view of the main part taken along line XI. FIG. 12 is an enlarged perspective view of an example of an external terminal used in the organic type KL of the present invention. FIGS. 13 to 18 are plan views of each step for explaining the EL manufacturing method of the present invention. l... KL element, 2.3... resin outer film, 15.16... internal terminal, 17.18... external terminal. Figure 3] o 9 8 Figure 5 Figure 7 Figure 6 Figure 8 Figure 9 Figure 10] 7 ]] Figure 17 (18) 17a (18a) Figure 13] 5 Figure 14] 6 Figure 15 Figure 17] 5 116 Figure 11 Figure 0 Dimensions

Claims (1)

[Claims] E and L are made by sandwiching an EL element between upper and lower resin outer films.
In an organic type ELvc in which the peripheral part protruding from the element is sealed by thermocompression, an internal terminal is arranged in the peripheral part protruding from the KL element, and the internal terminal is penetrated from the outside of the resin outer film to the inside. Organic type EL0 characterized by having an external terminal electrically and mechanically connected and fixed to the terminal.