Electric lamp and discharge devices – With luminescent solid or liquid material – Solid-state type
Reexamination Certificate
1998-06-08
2001-04-10
Patel, Nimeshkumar D. (Department: 2879)
Electric lamp and discharge devices
With luminescent solid or liquid material
Solid-state type
Reexamination Certificate
active
06215244
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an electroluminescence device, an electroluminescence apparatus, and production methods thereof and, more particularly, to an organic electroluminescence device and an organic electroluminescence apparatus that achieve light emission stable over the long period and with high luminance, and production methods thereof.
2. Related Background Art
The known organic electroluminescence members are, for example, those disclosed in Japanese Laid-open Patent Application Nos. 6-256759, 6-136360, 6-188074, 6-192654, and 8-41452.
It is also known that these organic electroluminescence members are driven by thin film transistors, for example, as described in Japanese Laid-open Patent Application No. 8-241048.
The emission luminance of the organic electroluminescence members was, however, not sufficient, when compared with CRT (catfode-ray tube) represented by a Braun tube.
In addition, the emission time is greatly decreased when the organic electroluminescence member is exposed to the atmosphere, particularly to the atmosphere containing even a small amount of water, during a film-forming step thereof. This was a great hindrance against practical use thereof.
Particularly, because emission of light of the three primary colors, red, green, and blue, was necessary for full-color display, three types of organic electroluminescence films for emitting the respective colors were prepared, and organic electroluminescence devices of a predetermined pattern were produced employing the photolithography process used in the process technology for production of color filters. Since the photolithography process had to be carried out in the atmosphere and since this process was often carried out under a wet condition, there was the problem that the patterning by the photolithography process was substantially not applicable to the organic electroluminescence materials.
It is thus the present status that the electroluminescence devices capable of emitting the three primary colors on a single substrate are not put in practical use yet.
SUMMARY OF THE INVENTION
An object of the present invention is to provide an electroluminescence device, solving the above problems, and particularly, a production method of the electroluminescence device.
Another object of the present invention is to provide a production method of electroluminescence device by which organic electroluminescence devices capable of emitting the three primary colors can be formed on a single substrate and by which continuously stable and high-luminance light emission is realized over the long period.
Still another object of the present invention is to provide a production method of organic electroluminescence device in which, for forming organic electroluminescence devices capable of emitting the three primary colors on a single substrate, the all steps can be carried out in vacuum, in a pressure-reduced space, or in a dry nitrogen atmosphere without exposure to the atmosphere.
Still another object of the present invention is to provide an electroluminescence device and an electroluminescence apparatus achieving high-luminance light emission, and production methods thereof.
Still another object of the present invention is to provide an electroluminescence device and an electroluminescence apparatus in which organic electroluminescence devices capable of emitting the three primary colors are formed on a single substrate and which achieve continuous, stable, high-luminance light emission over the long period, and production methods thereof.
Still another object of the present invention is to provide an organic electroluminescence device and an organic electroluminescence apparatus produced in such a way that, for forming organic electroluminescence devices capable of emitting the three primary colors on a single substrate, the all steps can be carried out in vacuum, a pressure-reduced space, or in a dry nitrogen atmosphere without exposure to the atmosphere, and production methods thereof.
First, the present invention has the first feature of a production method of electroluminescence device comprising steps of: making a surface of a crystal silicon substrate porous to form a porous silicon film; forming a first electroconductive film on the porous silicon film; forming an electroluminescence film on the first electroconductive film; forming a second electroconductive film on the electroluminescence film; peeling a laminate of the first electroconductive layer, the electroluminescence film, and the second electroconductive film from the crystal silicon substrate; and mounting the laminate on a first base material.
Second, the present invention has the second feature of a production method of electroluminescence device comprising steps of: making a surface of a crystal silicon substrate porous to form a porous silicon film; forming a first electroconductive film on the porous silicon film; forming an electroluminescence film on the first electroconductive film; forming a second electroconductive film on the electroluminescence film; peeling a laminate of the first electroconductive layer, the electroluminescence film, and the second electroconductive film from the crystal silicon substrate; mounting the laminate on a first base material; and then repeating the all foregoing steps one or more times except for using an electroluminescence film of a different kind from the first mentioned electroluminescence film.
Third, the present invention has the third feature of a production method of electroluminescence device comprising steps of: forming a first electroconductive film on a first base material (for example, a single crystal silicon substrate, a single crystal silicon substrate having a polycrystal silicon film on a surface thereof, or the like) having a peeling layer (for example, a porous silicon film or the like) so as to keep the first electroconductive film in a close-fit with the peeling layer; forming an electroluminescence film on the first electroconductive film; forming a second electroconductive film on the electroluminescence film; peeling a laminate of the first electroconductive film, the electroluminescence film, and the second electroconductive film from the first base material; and bonding the laminate onto a second base material prepared separately.
Fourth, the present invention has the fourth feature of an electroluminescence device comprising: a first electroluminescence member having a first anode, a first cathode, and a first electroluminescence material interposed between the first anode and first cathode; and a second electroluminescence member having a second anode overlaid on the first electroluminescence member, a second cathode, and a second electroluminescence material interposed between the second anode and second cathode, wherein the first anode and second anode are connected to each other and wherein the first cathode and second cathode are connected to each other.
Fifth, the present invention has the fifth feature of an electroluminescence device comprising: a first electroluminescence member having a first electrode, a first electroluminescence material connected to the first electrode, and a second electrode connected to the first electroluminescence material; and a second electroluminescence member having a third electrode overlaid on the second electrode of the first electroluminescence member with an insulating layer in between, a second electroluminescence material connected to the third electrode, and a fourth electrode connected to the second electroluminescence material, wherein the first electrode and the third electrode are connected to each other and the second electrode and the fourth electrode are connected to each other, and wherein the first electrode and the fourth electrode are insulated from each other and the second electrode and the third electrode are insulated from each other.
Sixth, the present invention has the sixth feature of an electroluminescence apparatus comprising electroluminescence devices arra
Hashimoto Yuichi
Kuribayashi Masaki
Mashimo Seiji
Senoo Akihiro
Ueno Kazunori
Canon Kabushiki Kaisha
Fitzpatrick ,Cella, Harper & Scinto
Gerike Matthew J.
Patel Nimeshkumar D.
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