Electric lamp and discharge devices – With luminescent solid or liquid material – Solid-state type
Reexamination Certificate
1999-09-10
2001-10-02
Patel, Vip (Department: 2879)
Electric lamp and discharge devices
With luminescent solid or liquid material
Solid-state type
C313S506000
Reexamination Certificate
active
06297589
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an organic EL (electroluminescence) full color display panel and a method of manufacturing it.
2. Description of the Related Art
FIG. 15
shows a section of a conventional dot matrix display panel using an organic EL device. As seen, on a transparent base plate (glass plate)
1
of e.g. ITO, a plurality of transparent electrode lines (anodes) A
1
-An (only A
1
, A
2
are shown) are arranged in parallel at regular intervals. On the transparent electrode lines A
1
-An, an organic EL material layer
4
is formed which includes a hole transporting layer, a light-emitting layer and an electron transporting layer. Further, a plurality of metallic electrode lines L
1
-Ln are arranged thereon at regular intervals.
The transparent electrode lines A
1
-An and the metallic electrode lines L
1
-Lm are extended in directions crossing each other. Each crossing area constitutes a light emitting region (unit pixel) to sandwich an organic EL material layer.
Further, an insulating layer
2
is formed so as to cover the edge of each of the transparent electrode lines A
1
-An. The insulating layer
2
is formed to prevent cross-talk light emission in the organic EL dot matrix display. The insulating layer
2
, which covers the edge of each of the transparent electrode lines A
1
-An where a driving current is apt to be concentrated, prevents a current from flowing into the organic EL material layer
4
on the transparent electrode lines, thereby preventing false light emission.
In recent years, in an application of the organic EL dot matrix display, attempts of implementing full color have been made. However, in such attempts, three kinds of organic EL materials for the light emission of red (R), green (G) and blue (B) are required for the light emitting layer, and must be applied to each of pixels. This leads an increase in the cost of material and complication in the manufacturing process as compared with a monochromatic display. The present invention has been accomplished in order to solve the problem as described above.
SUMMARY OF THE INVENTION
An object of an organic EL full color display which can be manufactured at reduced cost, and a method of manufacturing it.
In order to achieve the above object, in accordance with the present invention, there is provided an organic EL full color display panel with three pixels of R, G and B located most proximate to one another arranged in a delta shape, comprising: a base plate; a plurality of transparent electrode lines formed in parallel on the base plate; an insulating layer formed on the base plate, the insulating layer covering respective edges of the transparent electrode lines and having openings formed so as to correspond to pixel regions on the transparent electrode lines; at least one organic EL material layer formed so as to correspond to the pixel regions and having any light-emitting function of R, G and B, and a plurality of metallic electrode lines arranged in parallel perpendicularly to the transparent electrode lines, each of the metallic electrode entirely covering the pixel regions of the three pixels of R, G and B, wherein the insulating layer insulates the transparent electrode lines and metallic electrode lines from each other in other regions than the pixel regions.
In this configuration, the insulating layer formed on the base plate can cover the edges of each of the transparent electrode lines and determine a pixel region on each of the transparent electrode lines. In the other areas than the pixel regions, the insulating layer can also prevent short-circuiting between the transparent electrode lines and the metallic electrode lines. Therefore, the organic EL full color display panel can be provided at low manufacturing cost.
The above and other objects and features of the present invention will be more apparent from the following description taken in conjunction with the accompanying drawings.
Ishizuka Shinichi
Kubota Hirofumi
Miyaguchi Satoshi
Yoshida Kenji
Patel Vip
Pioneer Corporation
Sughrue Mion Zinn Macpeak & Seas, PLLC
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