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US4831269A
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Phosphors and fluorescent compositions for emission of light under low velocity electron excitation and fluorescent display devices utilizing the same
Assignee: Mitsubishi Chemical Corp
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Filing: 1985-12-18
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Granted: 1989-05-16
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Expires: 2005-12-18
Abstract
Abstract A phosphor for emission of light under low-velocity electron excitation having the formula: (Zn.sub.1-X,Cd.sub.x)S:aLi,bM.sup.I,cX (I) wherein 0≦x≦1, 0<a<1×10 -2 g/g, b≧0, c>0, M I is at least one element selected from the group consisting of Na, K, Ag, Rb, Cs, Au and Cu, and X is at least one element selected from the group consisting of Al, Cl, Br and I.
Inventors
- 👤 Akiyasu Kagami
- 👤 Takashi Hase
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:47
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/61; C09K11/611; C09K11/612; C09K11/613; C09K11/64; C09K11/641; C09K11/642; H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/18; H01J29/20
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
95 words
A phosphor which is capable of emitting light of high luminance under low velocity electron excitation having the formula: (Zn.sub.1-x, Cd.sub.x)S:aLi, bM.sup.I, cX, dY wherein 0≦x≦1, a is such that Li is present in the amount of 1-10,000 ppm, b>0, c≧0 and d≧0, with the proviso that c+d is greater than 0, and wherein M I is at least one element selected from the group consisting of Na, K, Ag, Rb, Cs, Au and Cu, X is at least one element selected from the group consisting of Cl, Br and I and Y is Al.
Claim 2
Dependent Claim
95 words
A phosphor which is capable of emitting light of high luminance under low velocity electron excitation having the formula: (Zn.sub.1-x, Cd.sub.x)S:aLi, bM.sup.I, cX, dY wherein 0≦x≦1, a is such that Li is present in the amount of 1-10,000 ppm, b>0, c≧0 and d≧0, with the proviso that c+d is greater than 0, and wherein M I is at least one element selected from the group consisting of Na, K, Ag, Rb, Cs, Au and Cu, X is at least one element selected from the group consisting of Cl, Br and I and Y is Al.
Claim 3
Dependent Claim
28 words
The phosphor for emission of light under low-velocity electron excitation according to claim 1, wherein in the formula I, b≠0, M I is Ag, and X is Cl.
Claim 4
Dependent Claim
17 words
The phosphor of claim 1, wherein said Li is present in the amount of about 35-5,000 ppm.
Claim 5
Dependent Claim
20 words
The phosphor of claim 1, wherein said element M I is Ag, Au, or a mixture of Na and Ag.
Claim 6
Dependent Claim
11 words
The phosphor of claim 1, wherein said element X is Cl.
Claim 7
Dependent Claim
120 words
A fluorescent composition comprising a phosphor which is capable of emitting light of high light of high luminance under low-velocity electron excitation having the formula: (Zn.sub.1-x, Cd.sub.x)S:aLi, bM.sup.I, cX, dY wherein 0≦x≦1, a is such that Li is present in the amount of 1-10,000 ppm, b>0, c≧0 and d≧0, with the proviso that c+d is greater than 0, and wherein M I is at least one element selected from the group consisting of Na, K, Ag, Rb, Cs, Au and Cu, X is at least one element selected from the group consisting of Cl, Br and I and Y is Al, and at least one conductive material selected from the group consisting of conductive metal oxides and conductive metal sulfides.
Claim 8
Dependent Claim
120 words
A fluorescent composition comprising a phosphor which is capable of emitting light of high light of high luminance under low-velocity electron excitation having the formula: (Zn.sub.1-x, Cd.sub.x)S:aLi, bM.sup.I, cX, dY wherein 0≦x≦1, a is such that Li is present in the amount of 1-10,000 ppm, b>0, c≧0 and d≧0, with the proviso that c+d is greater than 0, and wherein M I is at least one element selected from the group consisting of Na, K, Ag, Rb, Cs, Au and Cu, X is at least one element selected from the group consisting of Cl, Br and I and Y is Al, and at least one conductive material selected from the group consisting of conductive metal oxides and conductive metal sulfides.
Claim 9
Dependent Claim
33 words
The fluorescent composition according to claim 6 wherein the conductive material is at least one conductive metal oxide selected from the group consisting of In 2 O 3 , SnO 2 and ZnO.
Claim 10
Dependent Claim
37 words
The fluorescent composition according to claim 6 wherein the conductive material is at least one conductive metal sulfide selected from the group consisting of In 2 S 2 , CdS, Li 2 S and Cu 2 S.
Claim 11
Dependent Claim
18 words
The fluorescent composition of claim 6, wherein said phosphor contains Li in the amount of about 35-5,000 ppm.
Claim 12
Dependent Claim
21 words
The fluorescent composition of claim 6, wherein said element M I is Ag, Au or a mixture of Na and Ag.
Claim 13
Dependent Claim
15 words
The fluorescent composition of claim 6, wherein said element X in said phosphor is Cl.
Claim 14
Dependent Claim
26 words
The fluorescent composition of claim 6, wherein said conductive material is present in the amount of about 0.1 to 50% by weight relative to the phosphor.
Claim 15
Dependent Claim
91 words
A phosphor which is capable of emitting light of high luminance under low velocity electron excitation having the formula: (Zn.sub.1-x, Cd.sub.x)S:aLi, bM.sup.I, cX, dY wherein 0≦x≦1, a is such that Li is present in the amount of 1-10,000 ppm, b>0, c≧0 and d≧0, with the proviso that c+d is greater than 0, and wherein M I is at least one element selected from the group consisting of Ag, Au and Cu, X is at least one element selected from the group consisting of Cl, Br and I and Y is Al.
Claim 16
Dependent Claim
91 words
A phosphor which is capable of emitting light of high luminance under low velocity electron excitation having the formula: (Zn.sub.1-x, Cd.sub.x)S:aLi, bM.sup.I, cX, dY wherein 0≦x≦1, a is such that Li is present in the amount of 1-10,000 ppm, b>0, c≧0 and d≧0, with the proviso that c+d is greater than 0, and wherein M I is at least one element selected from the group consisting of Ag, Au and Cu, X is at least one element selected from the group consisting of Cl, Br and I and Y is Al.
Claim 17
Dependent Claim
113 words
A fluorescent composition comprising a phosphor which is capable of emitting light of high luminance under low-velocity electron excitation having the formula: (Zn.sub.1-x, Cd.sub.x)S:aLi, bM.sup.I, cX, dY wherein 0≦x≦1, a is such that Li is present in the amount of 1-10,000 ppm, b>0, c≧0 and d≧0, with the proviso that c+d is greater than 0, and wherein M I is at least one element selected from the group consisting of Ag, Au and Cu, X is at least one element selected from the group consisting of Cl, Br and I and Y is Al, and at least one conductive material selected from the group consisting of conductive metal oxides and conductive metal sulfides.
Claim 18
Dependent Claim
113 words
A fluorescent composition comprising a phosphor which is capable of emitting light of high luminance under low-velocity electron excitation having the formula: (Zn.sub.1-x, Cd.sub.x)S:aLi, bM.sup.I, cX, dY wherein 0≦x≦1, a is such that Li is present in the amount of 1-10,000 ppm, b>0, c≧0 and d≧0, with the proviso that c+d is greater than 0, and wherein M I is at least one element selected from the group consisting of Ag, Au and Cu, X is at least one element selected from the group consisting of Cl, Br and I and Y is Al, and at least one conductive material selected from the group consisting of conductive metal oxides and conductive metal sulfides.
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) | 1992-05-15 | 1992-11-14 | 1993-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-15 | 1996-11-14 | 1997-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-15 | 2000-11-14 | 2001-05-16 | $7700.00 | Window Closed / Lapsed |