Patent US6299597B1 successfully refreshed from Google Patents.
Patent EP0030853A1 successfully refreshed from Google Patents.
EP0030853A1
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Phosphor and method of manufacturing the phosphor
Assignee: Hitachi Ltd
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Filing: 1980-12-12
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Granted: —
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Expires: 2000-12-12
Abstract
Abstract A phosphor of high luminous intensity consists of an alkaline-earth metal sulfide which is activated with at least one element selected from the lanthanides, Mn, Cu, Ag, Pb and Au and is doped with phosphorus at a concentration in the range 100 p.p.m. to 10,000 p.p.m. and a halogen element. This phosphor when it contains Ba alone or both Ba and Mg at a concentration of 50 p.p.m. to 10,000 p.p.m. in the alkaline-earth metal sulfide has especially good luminous intensity.
Inventors
- 👤 Hiroyuki Kasano
- 👤 Koichi Megumi
- 👤 Hajime Yamamoto
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 07:36
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/0805; C09K11/0816
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
56 words
1 . A phosphor consisting of an alkaline-earth metal sulfide which is activated by at least one element selected from the lanthanides Mn, Cu, Ag, Pb, and Au and which contains at least one halogen element, characterized in that: the phosphor is doped with phosphorus at a concentration in the range 100 p.p.m. to 10,000 p.p.m.
Claim 2
Dependent Claim
56 words
1 . A phosphor consisting of an alkaline-earth metal sulfide which is activated by at least one element selected from the lanthanides Mn, Cu, Ag, Pb, and Au and which contains at least one halogen element, characterized in that: the phosphor is doped with phosphorus at a concentration in the range 100 p.p.m. to 10,000 p.p.m.
Claim 3
Dependent Claim
25 words
A phosphor according to claim 1 wherein said alkaline-earth metal sulfide is at least one of CaS, SrS, BaS, MgS, (Ca, Sr)S and (Ca, Mg)S.
Claim 4
Dependent Claim
30 words
A phosphor according to claim 1 wherein the concentration of the activating element or elements is 10 -5 to 10 -2 gram atom per mol of said alkaline-earth metal sulfide.
Claim 5
Dependent Claim
35 words
A phosphor according to any one of claims 1 to 3, wherein the concentration of said halogen element or elements is 10 -5 to 10 -1 gram atom per mol of said alkaline-earth metal sulfide.
Claim 6
Dependent Claim
81 words
A phosphor according to any one of claims 1 to 4, wherein said alkaline-earth metal sulfide has the general formula (A) M 1-x B ax S (where M is at least one of Ca, Sr and Mg, excluding a combination of Sr and Mg, and 0.00005 < x ≤0.01) , or (B) M' 1-x A x S (where M' is at least one of Ca and Sr, A is Ba or Ba and Mg together and 0.00005 ≤ x ≤ 0.01).
Claim 7
Dependent Claim
51 words
A phosphor having the general formula M 1-x Ba x S:Ln where M is at least one of Ca, Sr, and Mg, excluding a combination of Sr and Mg, Ln is at least one element selected from the lanthanides, Mn, Cu, Ag, Pb and Au, and 0.00005 ≤ x ≤ 0.01.
Claim 8
Dependent Claim
51 words
A phosphor having the general formula M 1-x Ba x S:Ln where M is at least one of Ca, Sr, and Mg, excluding a combination of Sr and Mg, Ln is at least one element selected from the lanthanides, Mn, Cu, Ag, Pb and Au, and 0.00005 ≤ x ≤ 0.01.
Claim 9
Dependent Claim
53 words
A phosphor having the general formula M' 1-x A x S:Ln, where M' is at least one of Ca and Sr, A is Ba or a combination of Ba and Mg, Ln is at least one element selected from the lanthanides, Mn, Cu, Ag, Pb and Au, and 0.00005 ≤ x ≤ 0.01.
Claim 10
Dependent Claim
53 words
A phosphor having the general formula M' 1-x A x S:Ln, where M' is at least one of Ca and Sr, A is Ba or a combination of Ba and Mg, Ln is at least one element selected from the lanthanides, Mn, Cu, Ag, Pb and Au, and 0.00005 ≤ x ≤ 0.01.
Claim 11
Dependent Claim
19 words
A phosphor according to claim 6 or claim 7 wherein Ln is at least one of Ce and Eu.
Claim 12
Dependent Claim
31 words
A phosphor according to any one of claims 6 to 8 wherein the concentration of In is 10 -5 to 10 -2 gram atom per mol of the alkaline-earth metal sulfide.
Claim 13
Dependent Claim
51 words
A phosphor according to any one of claims 6 to 9 further containing a habgen element or elements in a concentration in the range 10 -5 to 10 -1 gram atom per mol of the alkaline-earth metal sulfide, and phosphorus in a concentration in the range 100 p.p.m. to 10,000 p.p.m.
Claim 14
Independent Claim
88 words
A method of making an alkaline-earth metal sulfide phosphor which is activated with at least one element selected from the lanthanides Mn, Cu, Ag, Pb and Au characterized by heating: (a)(i) an alkaline earth metal sulfide or (ii) an alkaline earth metal compound capable of turning into a sulfide when heated together with sulfur or a sulfur compound, and sulfur or the sulfur compound as appropriate, (b) at least one compound of said activating element or elements, (c) phosphorus or a phosphorus compound, and (d) a halogen compound.
Claim 15
Independent Claim
88 words
A method of making an alkaline-earth metal sulfide phosphor which is activated with at least one element selected from the lanthanides Mn, Cu, Ag, Pb and Au characterized by heating: (a)(i) an alkaline earth metal sulfide or (ii) an alkaline earth metal compound capable of turning into a sulfide when heated together with sulfur or a sulfur compound, and sulfur or the sulfur compound as appropriate, (b) at least one compound of said activating element or elements, (c) phosphorus or a phosphorus compound, and (d) a halogen compound.
Claim 16
Dependent Claim
23 words
A method according to claim 11, wherein said alkaline-earth metal sulfide is at least one of CaS, SrS, BaS, MgS, (Ca,Sr)S and (Ca,Mg)S.
Claim 17
Dependent Claim
22 words
A method according to claim 11 or claim 12 wherein the heating is carried out in the temperature range 1,000°C to 1,400°C.
Claim 18
Independent Claim
31 words
A method according to any one of claims 11 to 13, wherein the phosphorus compound and the halogen compound are represented by PC1 3 , PF 5 or PF 3 .
Claim 19
Independent Claim
82 words
A method according to any one of claims 11 to 14 wherein said alkaline earth metal sulfide has the general formula (A) M 1-x Ba x S (where M is at least one of Ca, Sr, and Mg, excluding a combination of Sr and Mg and 0.00005 ≤ x ≤ 0.01) or (B) M' 1-x A x S (where M' is at least one of Ca and Sr, A is Ba or Ba combined with Mg and 0.00005 ≤ x ≤ 0.01).
Claim 20
Independent Claim
70 words
A method of manufacturing a phosphor according to any one of claims 6 to 10 characterized by heating: (a)(i) an alkaline-earth metal sulfide, or (ii) an alkaline-earth metal compound capable of turning into a sulfide-when heated together with sulfur or a sulfur compound, and sulfur or the sulfur compound as appropriate, and (b) at least one compound selected from compounds of the lanthanides elements, Mn, Cu, Ag, Pb and Au.
Claim 21
Dependent Claim
19 words
A method according to claim 16 wherein the heating is carried out in the temperature range 1,000°C to 1,400°C.
Claim 22
Dependent Claim
38 words
A cathode-ray tube characterized by at least one alkaline-earth metal sulfide phosphor which is activated with at least one element selected from the lanthanides Mn, Cu, Pb, Ag and Au, applied on the inner surface of its faceplate.
Claim 23
Dependent Claim
38 words
A cathode-ray tube characterized by at least one alkaline-earth metal sulfide phosphor which is activated with at least one element selected from the lanthanides Mn, Cu, Pb, Ag and Au, applied on the inner surface of its faceplate.
Claim 24
Dependent Claim
25 words
A cathode-ray tube according to claim 18 wherein said alkaline earth metal sulfide is at least one of CaS, SrS, BaS, MgS, (Ca,Sr)S and (Ca,Ng)S.
Claim 25
Dependent Claim
80 words
A cathode-ray tube according to claim 18 wherein said alkaline earth metal sulfide has the general formula (A; M 1-x Ba x S (where M is at least one of Ca Sr and Mg, excluding a combination of Sr and Mg and 0..0005 ≤ x ≤ 0.01) or (B) M' 1-x A x S (where M' is at least one of Ca and Sr, A is Ba or a combination of Ba and Mg and 0.00005 ≤ x ≤ 0.01).
Claim 26
Dependent Claim
55 words
A cathode-ray tube according to any one of claims 18 to 20 wherein said phosphor further contains a halogen element or elements in a concentration in the range 10 -5 to 10 -1 gram atom per mol of an alkaline-earth metal sulfide, and phosphorus in a concentration in the range 100 p.p.m. to 10,000 p.p.m.
Claim 27
Dependent Claim
27 words
A cathode-ray tube characterized by at least one alkaline-earth metal sulfide phosphor activated with Au and a halogen element applied on the inner surface of its faceplate.
Claim 28
Dependent Claim
27 words
A cathode-ray tube characterized by at least one alkaline-earth metal sulfide phosphor activated with Au and a halogen element applied on the inner surface of its faceplate.
Claim 29
Dependent Claim
25 words
A cathode-ray tube having at least one phosphor according to any one of claims 1 to 10 applied to the inner surface of its faceplate.
Claim 30
Dependent Claim
19 words
A cathode-ray tube according to any one of claims 18 to 23 which is a high current density tube.
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