JPS63152896A - Manufacture of multicolor el display - 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 [Field of Industrial Application] The present invention relates to a method for manufacturing a multicolor EL (electroluminescence) display device that can be used as pixels of a large-screen color display board.

[Conventional technology and problems]

Conventionally, for example, light emitting diodes (LEDs) and liquid crystal display elements have been used as pixels in large-screen color display boards, but both display elements are relatively expensive, and it is difficult to accurately position these display elements. Arranging them in a row has the disadvantage of complicating the manufacturing process and thus increasing the manufacturing cost of the conventional large screen color display panel. It is also possible to use an EL display device as a pixel, but
Conventionally, there has been no EL display device suitable for such pixels and capable of displaying multiple colors.

[Purpose of the invention]

In view of the above points, the present invention provides a method for manufacturing a multicolor EL display device, which is capable of displaying multiple colors, thereby allowing a large-screen color display board to be constructed with higher precision and at lower cost than before. It is an object.

[Means and actions for solving the problem] The above purpose is:
According to the present invention, an insulating layer is provided on an elongated metal electrode film, and red, green,
A step of sequentially coating and printing a light-emitting layer of one of the three primary colors of blue, and forming an electrode extraction hole on the side edge of each light-emitting layer in the metal electrode film coated and printed with an insulating layer and a light-emitting layer. a step of scribing at least the light emitting layer along the boundary of each light emitting layer in the lateral direction of the metal electrode film in which the electrode extraction hole is formed to separate adjacent light emitting layers; and a step of separating adjacent light emitting layers; a transparent conductive film which is scribed with the same width as the predetermined width of each light-emitting layer, and stacked on a metal electrode film with at least the light-emitting layer scribed thereon so that each light-emitting layer and each transparent electrode part face each other; After connecting one lead wire to each transparent electrode part through the electrode extraction hole and connecting the other lead wire to the metal electrode film, the metal electrode film with the transparent conductive film layered thereon is covered with a moisture-proof film from both sides. A method of manufacturing a multicolor EL display device includes the step of sealing.

In the above manufacturing method, preferably, the metal electrode film is provided with a barfration on at least one of its both edges for positioning and feeding the gold rl & electrode film in the longitudinal direction; After drilling the holes for taking out the electrodes or scribing the light emitting layer, the side edges of the metal electrode film having the barflation are cut.

According to the present invention, it is possible to obtain an EL display device capable of displaying multiple colors, in which elongated bar-shaped EL elements that can sequentially and repeatedly emit light in the three primary colors of red, green, and blue in one direction are continuously arranged with an accurate predetermined width. Moreover, the length in the longitudinal direction can be set to any length since it is manufactured using a long metal electrode film, and the multicolor EL display device manufactured in this way is long in one direction. By arranging a plurality of them in parallel, a large-screen color display board can be constructed.

〔Example〕

Hereinafter, the present invention will be explained in more detail based on one embodiment shown in the drawings.

FIGS. 1 to 10 show an embodiment of a method for manufacturing a multicolor EL display device according to the present invention in the order of steps.

First, in FIG. 1, a screen printing mechanism 2 is applied over almost the entire surface of a long metal electrode film, for example an AI electrode film 1, which is wound into a roll and has barfrations 1a and 1b along both side edges. An insulating layer 3 is coated and printed, and a light emitting layer 4 having a predetermined length and width extending in a direction perpendicular to the longitudinal direction of the electrode film 1 is coated and printed on the insulating layer 3, and then It is then dried in a drying oven 5 having a known configuration. At this time, the Al@ff1l film 1 is accurately positioned and fed in its longitudinal direction by the barflation 1a and 1b provided on both side edges of the ^l electrode film 1.

Further, as shown in FIG. 2, the light-emitting layer 4 has red and green layers alternately in the longitudinal direction of the Ali electrode film 1.

The light-emitting layers 4R, 4G, and 4B are configured to emit one of the three primary colors in the order of blue, red, blue, and green.

As a result, a set of light-emitting layers 4R, 4G, and 4B are repeatedly and continuously formed on the AII electrode film 1 in the longitudinal direction, and thus a rod-shaped EL element that alternately emits the three primary colors is formed on the electrode film 1. It will be formed continuously.

Next, as shown in FIG. 3, the insulating layer 3 and the three-color light emitting layer 4 are coated and printed on the insulating layer 3 and the AI electrode film is coated and printed on the insulating layer 3, and as shown in FIG. Electrode extraction holes 6 are sequentially punched on the side edges of each light emitting layer 4 using a puncher or the like, and A1 is formed so that both side edges of the electrode film 1 including the barfrations 1a and 1b extend in the longitudinal direction. 4, the side edges of each light emitting layer 4 are formed so that they face both side edges of the electrode film 1, and the electrode extraction hole 6 opens laterally. be done.

Subsequently, in the lateral direction of the AII polar film 1, at least a light emitting layer 4, in the illustrated case, an insulating N3 is formed along the boundary of each light emitting layer 4.
By scribing to the middle of the insulator N3, and in some cases to the lower surface of the insulator N3, adjacent light emitting layers 4 are separated by grooves 7 and electrically insulated, as shown in the cross-sectional view of FIG.

On the other hand, a transparent conductive film 8 to be layered on the light emitting layer 4
A transparent electrode part 8a made of ITO (indium oxide),
It is divided in advance by scribing or etching into the same width as the predetermined width of each light emitting layer 4, so that one transparent electrode portion 8a (see FIG. 6) is obtained for each light emitting layer N4. Then, this transparent conductive film 8 is superimposed on the AII polar film l formed as described above so that each transparent electrode part 8a faces each light emitting layer 4 of the Al electric scratched film 1 (first layer). (See Figure 7).

Next, as shown in an enlarged view in FIG. Connect the lead wire 10.

Finally, the AII polar film 1 and the transparent conductive film 8, which are superimposed and connected with the lead wires 9.10 as described above, are sealed from both sides with a moisture-proof film 1.1, as shown in FIG. By doing so, a multicolor EL display device W, 12 is obtained which has rod-shaped EL elements that emit light of any of the three primary colors in one direction alternately and continuously at a predetermined interval.

The multicolor EL display device according to the present invention is manufactured as described above, and the multicolor EL display device 12 manufactured in this way
By simply preparing a plurality of and arranging them in parallel as shown in FIG. 1O, the large color display board 13 can be constructed in an extremely simple manner and with high precision.

〔Effect of the invention〕

As described above, according to the present invention, an insulating layer is provided on a long metal electrode film, and the metal electrode film has a predetermined length and width extending in the lateral direction, that is, the direction perpendicular to the longitudinal direction. A step of sequentially coating and printing light-emitting layers of one of the three primary colors of red, green, and blue, and coating and printing the side edges of each light-emitting layer on the wA edge layer and the metal electrode film coated and printed with each light-emitting layer. A step of drilling holes for taking out electrodes in the metal electrode film, and forming holes along the boundaries of each light emitting layer in the lateral direction of the metal electrode film in which holes for taking out the electrodes are formed (both the light emitting layers are scribed so that they are adjacent to each other). The step of separating the light-emitting layers is to separate each light-emitting layer from a transparent conductive film, in which a transparent conductive film is scribed in advance to the same width as the predetermined width of each light-emitting layer, onto a metal electrode film on which at least a light-emitting layer is scribed. After stacking the transparent electrode parts so as to face each other, and connecting one lead wire to each transparent electrode through the electrode extraction holes and connecting the other lead wire to the metal electrode film, the transparent conductive film and Since a multicolor EL display device is manufactured by a method that includes the step of sealing one ilm with a moisture-proof film from both outer surfaces of the metal electrode, the three primary colors of red, green, and blue are repeatedly emitted in one direction. An EL display device capable of displaying multiple colors can be obtained, in which elongated bar-shaped EL elements are continuously arranged with an accurate predetermined width.

Therefore, the length in the longitudinal direction of the EL display device manufactured according to the present invention can be set to any desired length due to the use of a scraping film on a long metal, and the length of the EL display device manufactured in this way can be set to any desired length. By arranging a plurality of long multicolor ELL display devices in parallel, it becomes possible to construct a large-screen color display board with extremely high precision and at low cost.

In addition, when manufacturing this EL display device, the metal electrode film was
After forming a barfration for longitudinal positioning and feeding of the metal electrode film on at least one of both side edges, and after drilling a hole for taking out the electrode in the metal electrode film or scribing the light emitting layer. By cutting the side edges of the metal electrode film having barfration, the positioning and feeding of the metal electrode film in the longitudinal direction can be performed extremely accurately, and the multicolor ELL display device can be manufactured with even higher precision. can.

[Brief explanation of the drawing]

The drawings show an embodiment of the method for manufacturing a multicolor EL table display value device according to the present invention in the order of steps. Figures 2 to 4 are plan views showing the state of the A1 electrode film and each light-emitting layer at each stage, Figure 5 is a cross-sectional view showing the state of the light-emitting layer on the AI electrode film being scribed, and Figure 6 Figure 7 is a plan view showing the transparent conductive film, Figure 7 is a perspective view showing how the transparent conductive film is overlaid on the light emitting layer on the AI electrode film, and Figure 8 is a partially enlarged view showing how the lead wires are connected to the EL element. A perspective view, FIG. 9 is a perspective view of a multicolor ELL display device manufactured according to the present invention, FIG.
This figure is a plan view showing an example of a large-screen color display board using the multicolor ELL display device of FIG. 9. 1-.AI electrode film 5; 3.--insulating layer; 4.
・−・・Light emitting layer; 6・−・−・Electrode extraction hole near・
- Groove; 8- Transparent conductive film; 9, 10...Lead wire: 11-...Moisture-proof film; 12...-Multicolor E
LL display device; 13-...Large screen color display board. Patent applicant: Stanley Electric Co., Ltd. Representative: Patent attorney Hirayama - Vehicle distance: Patent attorney Yasu Kaizu 3,3 Figure 10

Claims (2)

[Claims] (1) An insulating layer is provided on a long metal electrode film, and the three primary colors of red, green, and blue are arranged alternately in a predetermined length and width extending in the lateral direction, that is, the direction perpendicular to the longitudinal direction of the metal electrode film. A step of sequentially coating and printing a luminescent layer of one color among them, and drilling holes for electrode extraction on the side edges of each luminescent layer in the metal electrode film coated and printed with the above-mentioned insulating layer and luminescent layer. scribing at least the luminescent layer along the boundary of each luminescent layer in the lateral direction of the metal electrode film provided with the electrode extraction hole to separate adjacent luminescent layers; overlaying a transparent conductive film with an electrode portion scribed in the same width as the predetermined width of each light emitting layer on a metal electrode film with at least a scribed light emitting layer so that each light emitting layer and each transparent electrode portion face each other; After connecting one lead wire to each transparent conductive film through the electrode extraction holes and connecting the other lead wire to the metal electrode film, the transparent conductive film and the metal electrode film are connected to each other by a moisture-proof film from both outer surfaces. A method for manufacturing a multicolor EL display device, comprising the steps of: sealing the device by a method. (2) The metal electrode film is provided with a barfration on at least one of its both edges for positioning and feeding the metal electrode film in the longitudinal direction, and a hole for taking out the electrode is bored in the metal electrode film. The multicolor EL according to claim 1, characterized in that the side edges of the metal electrode film having barflation are cut off after scribing the light emitting layer or after scribing the light emitting layer.
A method for manufacturing a display device.