Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Reexamination Certificate
1998-05-28
2001-01-16
Shankar, Vijay (Department: 2778)
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
C315S169300, C257S448000, C313S506000
Reexamination Certificate
active
06175345
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an electroluminescence device and an electroluminescence apparatus applicable to display devices, light-emitting sources, or printer heads of electrophotographic printers, and methods for producing them. More particularly, the invention relates to a device and an apparatus using organic electroluminescence members suitable for full-color display of large screen, and methods for producing them.
2. Related Background Art
The known organic electroluminescence members are, for example, those disclosed in Japanese Laid-Open Patent Applications No. 6-256759, No. 6-136360, No. 6-188074, No. 6-192654, and No. 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.
For driving the organic electroluminescence members by the thin film transistors, an organic electroluminescence member had to be mounted per drain electrode pad of thin film transistor, however. Particularly, in the case of the full-color display, the electroluminescence members of three kinds for electroluminescence emission of the three primary colors, blue, green, and red, had to be patterned on a thin film transistor substrate. Since the thin film transistor surface had greater unevenness than thin films of the electroluminescence members, it was difficult to pattern the thin films of electroluminescence members in high definition and high density. A further problem was that productivity was low, because the two types of functional devices, the transistors and electroluminescence members, were concentrated on the thin film transistor substrate.
The organic electroluminescence members had a further problem that long-term application of dc voltage thereto shortened continuous emission time. Particularly, when they were driven by the thin film transistors disclosed in Japanese Laid-Open Patent Application No. 8-241048 etc., there arose a problem that the dc voltage was continuously applied to the organic electroluminescence members, so as to promote deterioration of the organic electroluminescence members.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a device using organic electroluminescence members suitable for full-color display of large screen, solving the above problems, and a production method thereof.
Another object of the present invention is to provide an electroluminescence apparatus capable of continuous emission over the long term.
First, the present invention has the first feature of an electroluminescence device having a transistor substrate comprising thin film transistors arranged along a plurality of rows and columns, gate lines provided for the respective rows, each gate line being a common line for connecting gates of thin film transistors on one of the rows, source lines provided for the respective columns, each source line being a common line for connecting sources of thin film transistors on one of the columns, drain electrode pads each connected to a drain of the respective thin film transistors, and capacitors connected to the respective drain electrode pads; and an electroluminescence substrate comprising pairs of electrodes and electroluminescence members interposed between the pairs of electrodes, which are arranged along a plurality of rows and columns, wherein said thin film transistor substrate and electroluminescence substrate are placed opposite to each other so that the drain electrode pads and the electroluminescence members are opposed to each other, and wherein each drain electrode pad is connected through an adhesive electric connection member to one of a pair of electrodes.
Second, the present invention has the second feature of an electroluminescence device having a transistor substrate comprising first thin film transistors arranged along a plurality of rows and columns, gate lines provided for the respective rows, each gate line being a common line for connecting gates of first thin film transistors on one of the rows, source lines provided for the respective columns, each source line being a common line for connecting sources of first thin film transistors on one of the columns, second thin film transistors each connected to a drain of the respective first thin film transistors, and capacitors connected to the respective second thin film transistors, wherein a gate of each second thin film transistor is connected to the drain of the first thin film transistor, a drain electrode pad is connected to a drain of each second thin film transistor, and a source of each second thin film transistor is connected to one electrode of the capacitor; and an electroluminescence substrate comprising pairs of electrodes and electroluminescence members interposed between the pairs of electrodes, which are arranged along a plurality of rows and columns, wherein said thin film transistor substrate and electroluminescence substrate are placed opposite to each other so that the drain electrode pads and the electroluminescence members are opposed to each other, and wherein each drain electrode pad is connected through an adhesive electric connection member to one of a pair of electrodes.
Third, the present invention has the third feature of a production method of electroluminescence device comprising steps of: preparing a transistor substrate comprising thin film transistors arranged along a plurality of rows and columns, gate lines provided for the respective rows, each gate line being a common line for connecting gates of thin film transistors on one of the rows, source lines provided for the respective columns, each source line being a common line for connecting sources of thin film transistors on one of the columns, drain electrode pads each connected to a drain of the respective thin film transistors, and capacitors connected to the respective drain electrode pads; preparing an electroluminescence substrate comprising pairs of electrodes and electroluminescence members interposed between the pairs of electrodes, which are arranged along a plurality of rows and columns; placing an adhesive electric connection member on at least one of the drain electrode pads of the transistor substrate and the electroluminescence members; and overlaying the thin film transistor substrate on the electroluminescence substrate opposite to each other so that the drain electrode pads and the electroluminescence members are opposed to each other.
Fourth, the present invention has the fourth feature of a production method of electroluminescence device comprising steps of: preparing a transistor substrate comprising thin film transistors arranged along a plurality of rows and columns, gate lines provided for the respective rows, each gate line being a common line for connecting gates of thin film transistors on one of the rows, source lines provided for the respective columns, each source line being a common line for connecting sources of thin film transistors on one of the columns, drain electrode pads each connected to a drain of the respective thin film transistors, and capacitors connected to the respective drain electrode pads; preparing an electroluminescence substrate comprising pairs of electrodes and electroluminescence members interposed between the pairs of electrodes, which are arranged along a plurality of rows and columns; placing an adhesive electric connection member on at least one of the drain electrode pads of the transistor substrate and the electroluminescence members; placing an adhesive electric insulator around the periphery of the adhesive electric connection member on at least one of the drain electrode pads of the transistor substrate and the electroluminescence members; and overlaying the thin film transistor substrate on the electroluminescence substrate opposite to each other so that the drain electrode pads and the electroluminescence members are opposed to each other.
Fifth, the present invention has the fifth feature of a production method of e
Hashimoto Yuichi
Kuribayashi Masaki
Senoo Akihiro
Tsuzuki Hidetoshi
Ueno Kazunori
Canon Kabushiki Kaisha
Fitzpatrick ,Cella, Harper & Scinto
Piziali Jeff
Shankar Vijay
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