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US 7,612,753 B2Granted
Display device and method for fabricating the same
AssigneeSemiconductor Energy Energy Laboratory Co., Ltd.
InventorJun Koyama
Life of this patent
Estimating the term…
Abstract
An inexpensive display device, as well as an electrical apparatus employing the same, can be provided. In the display device in which a pixel section and a driver circuit are included on one and the same insulating surface, the driver circuit includes a decoder 100 and a buffer section 101. The decoder 100 includes a plurality of NAND circuits each including p-channel TFTs 104 to 106 connected to each other in parallel and other p-channel TFTs 107 to 109 connected to each other in series. The buffer section 101 includes a plurality of buffers each including three p-channel TFTs 114 to 116.
Claims54
A display device, comprising:
- first and second source wirings formed on and in contact with a first surface over a substrate;
- a gate wiring formed on and in contact with said first surface;
- a pixel electrode formed on a second surface;
- a connecting wiring which connects the first and second source wirings;
- and
- a driver section over the substrate,
- wherein said driver section comprises a decoder including a plurality of NAND circuits each of which is formed of a TFT of one conductivity type,
- wherein said pixel electrode is electrically connected to a transistor,
- wherein said connecting wiring overpasses the gate wiring, and
- wherein said connecting wiring is formed on the second surface.
7 more elements
A display device, comprising:
- a source wiring formed on and in contact with a first surface over a substrate;
- first and second gate wirings formed on and in contact with said first surface;
- a pixel electrode formed on a second surface;
- a connecting wiring which connects the first and second gate wirings;
- and
- a driver section over the substrate,
- wherein said driver section comprises a decoder including a plurality of NAND circuits each of which is formed of a TFT of one conductivity type,
- wherein said pixel electrode is electrically connected to a transistor,
- wherein said connecting wiring overpasses the source wiring, and
- wherein said connecting wiring is formed on the second surface,
7 more elements
A display device, comprising:
- a source wiring formed on and in contact with a first surface over a substrate;
- first, second, and third gate wirings formed on and in contact with said first surface;
- a current supply line formed on and in contact with said first surface;
- a pixel electrode formed on a second surface;
- a first connecting wiring which connects the first and second gate wirings;
- a second connecting wiring which connects the second and third gate wirings;
- and
- a driver section over the substrate,
- wherein said driver section comprises a decoder including a plurality of NAND circuits each of which is formed of a TFT of one conductivity type,
- wherein said pixel electrode is electrically connected to a transistor,
- wherein said first connecting wiring overpasses the source wiring,
- wherein said second connecting wiring overpasses the current supply line, and
- wherein said first and second connecting wirings are formed on the second surface.
10 more elements
A display device, comprising:
- first, second, and third source wirings formed on and in contact with a first surface over a substrate;
- a gate wiring formed on and in contact with said first surface;
- a current supply line formed on and in contact with said first surface;
- a pixel electrode formed on a second surface;
- a first connecting wiring which connects the first and second source wirings;
- a second connecting wiring which connects the second and third source wirings;
- and
- a driver section over the substrate,
- wherein said driver section comprises a decoder including a plurality of NAND circuits each of which is formed of a TFT of one conductivity type,
- wherein said pixel electrode is electrically connected to a transistor,
- wherein said first connecting wiring overpasses the gate wiring,
- wherein said second connecting wiring overpasses the current supply line, and
- wherein said first and second connecting wirings are formed on the second surface.
10 more elements
A display device, comprising:
- a pixel section and a driver circuit that are formed on a substrate,
- wherein the pixel section comprises first and second gate wirings formed on and in contact with a surface over the substrate, a source wiring formed on and in contact with said surface over the substrate, and a connecting wiring which connects the first and second gate wirings,
- wherein said first and second gate wirings are formed of a conductive film,
- wherein said source wiring is formed of said conductive film, and
- wherein said driver circuit comprises a decoder including a plurality of NAND circuits each of which is formed of a TFT of one conductivity type.
2 more elements
A display device, comprising:
- a pixel section and a driver circuit that are formed on a substrate,
- wherein the pixel section comprises first and second gate wirings formed on and in contact with a surface over the substrate, a source wiring formed on and in contact with said surface over the substrate, and a connecting wiring which connects the first and second gate wirings,
- wherein said first and second gate wirings are formed of a conductive film,
- wherein said source wiring is formed of said conductive film, and
- wherein said driver circuit comprises a decoder including a plurality of NAND circuits each of which is formed of a TFT of one conductivity type, and
- wherein each of said NAND circuits comprises n TFTs of said one conductivity type connected to each other in series and n TFTs of said one conductivity type connected to each other in parallel.
3 more elements
A display device, comprising:
- a pixel section and a driver circuit that are formed on a substrate,
- wherein the pixel section comprises first and second gate wirings formed on and in contact with a surface over the substrate, a source wiring formed on and in contact with said surface over the substrate,
- wherein said first and second gate wirings are formed of a conductive film, and a connecting wiring which connects the first and second gate wirings,
- wherein said source wiring is formed of said conductive film,
- wherein said driver circuit comprises a decoder including a plurality of NAND circuits each of which is formed of a TFT of one conductivity type, and
- wherein said driver circuit comprises a buffer formed of TFTs of said one conductivity type.
3 more elements
A display device, comprising:
- a pixel section and a driver circuit that are formed on a substrate,
- wherein the pixel section comprises first and second gate wirings formed on and in contact with a surface over the substrate, a source wiring formed on and in contact with said surface over the substrate, and a connecting wiring which connects the first and second gate wirings,
- wherein said first and second gate wirings are formed of a conductive film,
- wherein said source wiring is formed of said conductive film, and
- wherein said driver circuit comprises:
- a decoder including a plurality of NAND circuits each formed of a TFT of one conductivity type;
- and
- a buffer formed of TFTs of said one conductivity type, and
- said buffer comprising:
- a first TFT of said one conductivity type;
- and
- a second TFT of said one conductivity type that is connected to said first TFT in series,
- wherein a drain of the first TFT is connected to a gate of the second TFT.
10 more elements
A display device, comprising:
- a pixel section and a driver circuit that are formed on a substrate,
- wherein the pixel section comprises first and second gate wirings formed on and in contact with a surface over the substrate, a source wiring formed on and in contact with said surface over the substrate, and a connecting wiring which connects the first and second gate wirings,
- wherein said first and second gate wrings are formed of a conductive film,
- wherein said source wiring is formed of said conductive film, and
- wherein said driver circuit comprises:
- a decoder including a plurality of NAND circuits each formed of a TFT of one conductivity type;
- and
- a buffer formed of TFTs of said one conductivity type,
- each of said NAND circuits comprises n TFTs of said one conductivity type connected to each other in series and n TFTs of said one conductivity type connected to each other in parallel, and
- said buffer comprising:
- a first TFT of said one conductivity type;
- and
- a second TFT of said one conductivity type that is connected to said first TFT in series,
- wherein a drain of the first TFT is connected to a gate of the second TFT.
11 more elements
A method for fabricating a display device, comprising the steps of:
- forming a semiconductor layer on an insulating surface over a substrate;
- forming a gate insulating film on said semiconductor layer;
- forming a plurality of source wirings on and in contact with said gate insulating film;
- forming a gate wiring on and in contact with said gate insulating film;
- forming a current supply line on and in contact with said gate insulating film;
- forming a p-type semiconductor region in said semiconductor layer;
- forming an interlayer insulating film over said plurality of source wirings, said gate wiring and said current supply line;
- forming contact holes respectively reaching said plurality of source wirings, said p-type semiconductor region, and said current supply line;
- forming a connecting wiring that overpasses said gate wiring and connects the plurality of source wirings to each other;
- and
- forming a decoder comprising a plurality of NAND circuits each of which is formed of a TFT of one conductivity type over the substrate.
8 more elements
A method for fabricating a display device, comprising the steps of:
- forming a semiconductor layer on an insulating surface over a substrate;
- forming a gate insulating film on said semiconductor layer;
- forming a source wiring on and in contact with said gate insulating film;
- forming a plurality of gate wirings on and in contact with said gate insulating film;
- forming a current supply line on and in contact with said gate insulating film;
- forming a p-type semiconductor region in said semiconductor layer;
- forming an interlayer insulating film over said source wiring, said plurality of gate wirings and said current supply line;
- forming contact holes respectively reaching said source wiring, said p-type semiconductor region, and said current supply line;
- forming a connecting wiring that overpasses said source wiring and connects the plurality of gate wirings to each other;
- and
- forming a decoder comprising a plurality of NAND circuits each of which is formed of a TFT of one conductivity type over the substrate.
8 more elements
A display device, comprising:
- a gate wiring formed on and in contact with a surface over a substrate;
- first and second source wirings formed on and in contact with said surface over the substrate;
- an interlayer insulating film formed over said gate wiring and said first and second source wirings;
- a connecting wiring formed over said interlayer insulating film;
- and
- a driver section over the substrate;
- wherein said driver section comprises a decoder including a plurality of NAND circuits each of which is formed of a TFT of one conductivity type,
- wherein said first and second source wirings are formed of a conductive film,
- wherein said gate wiring is formed of said conductive film,
- wherein the connecting wiring connects the first and second gate wirings, and
- wherein said connecting wiring is formed on the same surface by the same conductive film as a drain wiring of a current-controlling TFT.
8 more elements
A display device, comprising:
- first and second gate wirings formed on and in contact with a surface over a substrate;
- a source wiring formed on and in contact with said surface over the substrate;
- an interlayer insulating film formed over said first and second gate wirings and said source wiring;
- a connecting wiring formed over said interlayer insulating film;
- and
- a driver section over the substrate,
- wherein said driver section comprises a decoder including a plurality of NAND circuits each of which is formed of a TFT of one conductivity type,
- wherein said source wiring is formed of a conductive film,
- wherein said first and second gate wirings are formed of said conductive film,
- wherein the connecting wiring connects the first and second gate wirings, and
- wherein said connecting wiring is formed on the same surface by the same conductive film as a drain wiring of a current-controlling TFT.
8 more elements
Dependencies are inferred from the claim text.