US5085947A
Expired / Lapsed
US
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Electroluminescence device
Assignee: Ricoh Co Ltd
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Filing: 1989-12-29
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Granted: 1992-02-04
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Expires: 2009-12-29
Abstract
Abstract An electroluminescence device containing a first organic compound having positive-hole-transporting and luminous properties, such as a triphenyl amine compound, a stilbene derivative or a pyrazoline derivative, and a second organic compound having electron-transporting property, such as an oxadiazole derivative, in its luminescence layer interposed between a pair of electrodes.
Inventors
- 👤 Shogo Saito
- 👤 Tetsuo Tsutui
- 👤 Chihaya Adachi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:14
CPC Classifications
H; H05; H05B; H05B33/00; H05B33/12; H05B33/26; C; C09; C09K; C09K11/00; C09K11/06; H05B33/14; H05B33/22; H05B33/24; H10; H10K; H10K50/00; H10K50/10; H10K50/11; H10K50/14; H10K85/00; H10K85/60; H10K85/615; H10K85/631; H10K85/649; H10K85/656; H10K85/6565; Y; Y10; Y10S; Y10S428/00; Y10S428/917
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
67 words
An electroluminescence device comprising: a positive electrode; a luminescence layer in direct contact with said positive electrode, said luminescence layer consisting of a first organic compound having positive-hole transport and luminous properties selected from the group consisting of ##STR7## and a second organic compound having electron-transporting property of the formula ##STR8## wherein t Bu is tert-butyl; and a negative electrode in direct contact with said luminescence layer.
Claim 2
Dependent Claim
67 words
An electroluminescence device comprising: a positive electrode; a luminescence layer in direct contact with said positive electrode, said luminescence layer consisting of a first organic compound having positive-hole transport and luminous properties selected from the group consisting of ##STR7## and a second organic compound having electron-transporting property of the formula ##STR8## wherein t Bu is tert-butyl; and a negative electrode in direct contact with said luminescence layer.
Claim 3
Dependent Claim
20 words
The device as claimed in claim 1, wherein said luminescence layer has a thickness of 200 Å to 3000 Å.
Claim 4
Dependent Claim
32 words
The device as claimed in claim 1, wherein the weight ratio of said organic compound to said second organic compound, in said luminescence layer, is in the range of 10/90 to 90/10.
Claim 5
Dependent Claim
32 words
The device as claimed in claim 1, wherein said positive electrode comprises a material selected from the group consisting of gold, platinum, palladium, tin oxide, indium-tin oxide and an organic electroconductive material.
Claim 6
Dependent Claim
23 words
The device as claimed in claim 1, wherein said positive electrode is transparent to light having a wavelength of 400 nm or more.
Claim 7
Dependent Claim
25 words
The device as claimed in claim 1, wherein said negative electrode comprises a material selected from the group consisting of Mg, Al, Ag and In.
Claim 8
Dependent Claim
86 words
An electroluminescence device comprising: a positive electrode; a luminescence layer comprising a first layer in direct contact with said positive electrode, said first layer consisting of a first organic compound having positive-hole transporting and luminous properties selected from the group consisting of ##STR9## and a second layer in direct contact with said first layer, said second layer consisting of a second organic compound having electron-transporting property of the formula ##STR10## wherein t Bu is tert-butyl; and a negative electrode in direct contact with said second layer.
Claim 9
Dependent Claim
86 words
An electroluminescence device comprising: a positive electrode; a luminescence layer comprising a first layer in direct contact with said positive electrode, said first layer consisting of a first organic compound having positive-hole transporting and luminous properties selected from the group consisting of ##STR9## and a second layer in direct contact with said first layer, said second layer consisting of a second organic compound having electron-transporting property of the formula ##STR10## wherein t Bu is tert-butyl; and a negative electrode in direct contact with said second layer.
Claim 10
Dependent Claim
23 words
The device as claimed in claim 7, wherein said first layer has a thickness in the range of 100 Å to 2000 Å.
Claim 11
Dependent Claim
23 words
The device as claimed in claim 7, wherein said second layer has a thickness in the range of 100 Å to 1500 Å.
Claim 12
Dependent Claim
32 words
The device as claimed in claim 7, wherein said positive electrode comprises a material selected from the group consisting of gold, platinum, palladium, tin oxide, indium-tin oxide and an organic electroconductive material.
Claim 13
Dependent Claim
23 words
The device as claimed in claim 7, wherein said positive electrode is transparent to light having a wavelength of 400 nm or more.
Claim 14
Dependent Claim
25 words
The device as claimed in claim 7, wherein said negative electrode comprises a material selected from the group consisting of Mg, Al, Ag and In.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-02-03 | 1995-08-05 | 1996-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-02-03 | 1999-08-05 | 2000-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-02-03 | 2003-08-05 | 2004-02-04 | $7700.00 | Window Closed / Lapsed |