Patent US6281634B1 successfully refreshed from Google Patents.
US6281634B1
Expired / Lapsed
US
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Color electroluminescence display device
Assignee: Sanyo Electric Co Ltd
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Filing: 1999-11-30
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Granted: 2001-08-28
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Expires: 2019-11-30
Abstract
Abstract Discrete anodes ( 7 ) and discrete emissive layers ( 15 ) are formed for respective pixels, while a hole-transport layer ( 14 ), an electron-transport layer ( 16 ), and a cathode ( 17 ) are formed to extend over a plurality of pixels. Accordingly, a process of etching-back the hole-transport layer ( 14 ) and the electron-transport layer ( 16 ) is eliminated. Also, since partitions ( 68 ) as conventionally provided are not necessary, the process of forming the partitions can also be eliminated. The anode ( 7 ) and the cathode ( 17 ) are separated by the hole-transport layer ( 14 ) and the electron-transport layer ( 16 ), and are therefore not subject to shorting, even though no partition ( 68 ) is employed. Further, since the emissive layer ( 15 ) is larger than the anode ( 7 ), a leak current generated at the ends of the anode and field concentration can be prevented.
Inventors
- 👤 Ryoichi Yokoyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:39
CPC Classifications
H; H10; H10K; H10K59/00; H10K59/30; H10K59/35; H05; H05B; H05B33/00; H10K59/10; H10K59/12; H10K50/00; H10K50/10; H10K50/14; H10K59/121
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
96 words
An electroluminescence display device in which a plurality of pixels are arranged, each of said pixels comprising: an electroluminescence element including an emissive layer and at least one charge-transport layer which transports charges from a first or a second electrode between said first electrode and said second electrode; and a switch for controlling luminescence operation in said electroluminescence element, wherein both of said first electrode and said emissive layer are formed for each of said pixels, and both of said second electrode and said charge-transport layer are formed to be shared by a plurality of pixels.
Claim 2
Dependent Claim
96 words
An electroluminescence display device in which a plurality of pixels are arranged, each of said pixels comprising: an electroluminescence element including an emissive layer and at least one charge-transport layer which transports charges from a first or a second electrode between said first electrode and said second electrode; and a switch for controlling luminescence operation in said electroluminescence element, wherein both of said first electrode and said emissive layer are formed for each of said pixels, and both of said second electrode and said charge-transport layer are formed to be shared by a plurality of pixels.
Claim 3
Dependent Claim
28 words
An electroluminescence display device according to claim 1 , wherein said charge-transport layer is a hole-transport layer which transports holes supplied from an anode to said emissive layer.
Claim 4
Dependent Claim
32 words
An electroluminescence display device according to claim 2 , wherein said first electrode is said anode, and wherein said anode, said hole-transport layer and said emissive layer are formed in this order.
Claim 5
Dependent Claim
28 words
An electroluminescence display device according to claim 1 , wherein said charge-transport layer is an electron-transport layer which transports electrons supplied from a cathode to said emissive layer.
Claim 6
Dependent Claim
32 words
An electroluminescence display device according to claim 4 , wherein said second electrode is said cathode, and wherein said cathode, said electron-transport layer and said emissive layer are formed in this order.
Claim 7
Dependent Claim
36 words
An electroluminescence display device according to claim 1 , wherein said emissive layer contains an emissive material for one of red, green and blue colors, and wherein each electroluminescence element directly emits one of said colors.
Claim 8
Dependent Claim
23 words
An electroluminescence display device according to claim 1 , wherein said first electrode and said emissive layer have substantially the same planar shape.
Claim 9
Dependent Claim
30 words
An electroluminescence display device according to claim 1 , wherein said emissive layer is formed larger than said first electrode so as to cover the edges of said first electrode.
Claim 10
Dependent Claim
17 words
An electroluminescence display device according to claim 1 , wherein said switch is a thin film transistor.
Claim 11
Dependent Claim
26 words
An electroluminescence display device according to claim 1 , wherein said charge-transport layer has a higher resistance compared to said first electrode and said second electrode.
Claim 12
Dependent Claim
135 words
An electroluminescence display device in which a plurality of pixels are arranged, each of said pixels comprising: an electroluminescence element including an emissive layer and at least one charge-transport layer which transports charges from a first or a second electrode between said first electrode and said second electrode; and a switch for controlling luminescence operation in said electroluminescence element, wherein both of said first electrode and said emissive layer are formed for each of said pixels, said emissive layer contains an emissive material for one of red, green and blue colors, and each electroluminescence element directly emits one of said colors, and wherein said second electrode, and said change-transport layer having a higher resistance compared to said second electrode and said first electrode, are formed so as to be shared by a plurality of pixels.
Claim 13
Dependent Claim
135 words
An electroluminescence display device in which a plurality of pixels are arranged, each of said pixels comprising: an electroluminescence element including an emissive layer and at least one charge-transport layer which transports charges from a first or a second electrode between said first electrode and said second electrode; and a switch for controlling luminescence operation in said electroluminescence element, wherein both of said first electrode and said emissive layer are formed for each of said pixels, said emissive layer contains an emissive material for one of red, green and blue colors, and each electroluminescence element directly emits one of said colors, and wherein said second electrode, and said change-transport layer having a higher resistance compared to said second electrode and said first electrode, are formed so as to be shared by a plurality of pixels.
Claim 14
Dependent Claim
28 words
An electroluminescence display device according to claim 11 , wherein said charge-transport layer is a hole-transport layer which transports holes supplied from an anode to said emissive layer.
Claim 15
Dependent Claim
32 words
An electroluminescence display device according to claim 12 , wherein said first electrode is said anode, and wherein said anode, said hole-transport layer and said emissive layer are formed in this order.
Claim 16
Dependent Claim
28 words
An electroluminescence display device according to claim 11 , wherein said charge-transport layer is an electron-transport layer which transports electrons supplied from a cathode to said emissive layer.
Claim 17
Dependent Claim
32 words
An electroluminescence display device according to claim 14 , wherein said second electrode is said cathode, and wherein said cathode, said electron-transport layer and said emissive layer are formed in this order.
Claim 18
Dependent Claim
103 words
An electroluminescence display device in which a plurality of pixels are arranged, each of said pixels comprising: an anode, a cathode, and an electroluminescence element layer, provided between said anode and said cathode, including an emissive layer and a hole-transport layer which transports holes supplied from said anode to said emissive layer and an electron-transport layer which transports electrons supplied from said cathode to said emissive layer, wherein said anode and said emissive layer are formed for each of the pixels, and wherein said cathode and said hole-transport layer and said electron-transport layer are formed to be shared by a plurality of pixels.
Claim 19
Dependent Claim
103 words
An electroluminescence display device in which a plurality of pixels are arranged, each of said pixels comprising: an anode, a cathode, and an electroluminescence element layer, provided between said anode and said cathode, including an emissive layer and a hole-transport layer which transports holes supplied from said anode to said emissive layer and an electron-transport layer which transports electrons supplied from said cathode to said emissive layer, wherein said anode and said emissive layer are formed for each of the pixels, and wherein said cathode and said hole-transport layer and said electron-transport layer are formed to be shared by a plurality of pixels.
Claim 20
Dependent Claim
35 words
An electroluminescence display device according to claim 16 , wherein said emissive layer contains an emissive material for one of red, green and blue colors, and each electroluminescence element directly emits one of said colors.
Claim 21
Dependent Claim
22 words
An electroluminescence display device according to claim 16 , wherein said anode and said emissive layer have substantially the same planar shape.
Claim 22
Dependent Claim
120 words
An electroluminescence display device in which a plurality of pixels are arranged, each of said pixels comprising: an electroluminescence element including an emissive layer and at least one charge-transport layer which transports charges from a first or a second electrode between said first electrode and said second electrode; and a switch for controlling luminescence operation in said electroluminescence element, wherein both of said first electrode and said emissive layer are formed for each of said pixels, and both of said second electrode and said charge-transport layer are formed to be shared by a plurality of pixels, and wherein said first electrode is said anode, and wherein said anode, said charge-transport layer and said emissive layer are formed in this order.
Claim 23
Dependent Claim
120 words
An electroluminescence display device in which a plurality of pixels are arranged, each of said pixels comprising: an electroluminescence element including an emissive layer and at least one charge-transport layer which transports charges from a first or a second electrode between said first electrode and said second electrode; and a switch for controlling luminescence operation in said electroluminescence element, wherein both of said first electrode and said emissive layer are formed for each of said pixels, and both of said second electrode and said charge-transport layer are formed to be shared by a plurality of pixels, and wherein said first electrode is said anode, and wherein said anode, said charge-transport layer and said emissive layer are formed in this order.
Claim 24
Dependent Claim
133 words
An electroluminescence display device in which a plurality of pixels are arranged, each of said pixels comprising: an electroluminescence element including an emissive layer and at least one charge-transport layer which transports charges from a first or a second electrode between said first electrode and said second electrode; and a switch for controlling luminescence operation in said electroluminescence element, wherein both of said first electrode and said emissive layer are formed for each of said pixels, and both of said second electrode and said charge-transport layer are formed to be shared by a plurality of pixels, and wherein said first electrode is said anode, and wherein said anode, said charge-transport layer and said emissive layer are formed in this order, and wherein said emissive layers of adjacent pixels do not contact one another.
Claim 25
Dependent Claim
133 words
An electroluminescence display device in which a plurality of pixels are arranged, each of said pixels comprising: an electroluminescence element including an emissive layer and at least one charge-transport layer which transports charges from a first or a second electrode between said first electrode and said second electrode; and a switch for controlling luminescence operation in said electroluminescence element, wherein both of said first electrode and said emissive layer are formed for each of said pixels, and both of said second electrode and said charge-transport layer are formed to be shared by a plurality of pixels, and wherein said first electrode is said anode, and wherein said anode, said charge-transport layer and said emissive layer are formed in this order, and wherein said emissive layers of adjacent pixels do not contact one another.
Claim 26
Dependent Claim
148 words
An electroluminescence display device in which a plurality of pixels are arranged, each of said pixels comprising: an electroluminescence element including an emissive layer and at least one charge-transport layer which transports charges from a first or a second electrode between said first electrode and said second electrode; and a switch for controlling luminescence operation in said electroluminescence element, wherein both of said first electrode and said emissive layer are formed for each of said pixels, said emissive layer contains an emissive material for one of red, green and blue colors, and each electroluminescence element directly emits one of said colors, and wherein said second electrode, and said charge-transport layer having a higher resistance compared to said second electrode and said first electrode, are formed so as to be shared by a plurality of pixels, and wherein said emissive layers of adjacent pixels do not contact one another.
Claim 27
Dependent Claim
148 words
An electroluminescence display device in which a plurality of pixels are arranged, each of said pixels comprising: an electroluminescence element including an emissive layer and at least one charge-transport layer which transports charges from a first or a second electrode between said first electrode and said second electrode; and a switch for controlling luminescence operation in said electroluminescence element, wherein both of said first electrode and said emissive layer are formed for each of said pixels, said emissive layer contains an emissive material for one of red, green and blue colors, and each electroluminescence element directly emits one of said colors, and wherein said second electrode, and said charge-transport layer having a higher resistance compared to said second electrode and said first electrode, are formed so as to be shared by a plurality of pixels, and wherein said emissive layers of adjacent pixels do not contact one another.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2004-08-27 | 2005-02-26 | 2005-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-08-27 | 2009-02-26 | 2009-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-08-27 | 2013-02-26 | 2013-08-28 | $7700.00 | Window Closed / Lapsed |