EP0074585A1
Expired / Lapsed
EP
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Blue-green emitting halophosphate phosphor, and fluorescent lamp employing the same
Assignee: Toshiba Corp
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Filing: 1982-09-03
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Granted: —
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Expires: 2002-09-03
Abstract
Abstract Disclosed are a blue-green emitting halophosphate phosphor activated with divalent europium which is represented by the general formula: (wherein, M consists of Ba, Ca and Mg; X is one or more of F, Ct or Br; and x is a positive value of less than 5); and a fluorescent lamp which comprises a mixture of a phosphor (i) comprising an alkaline earth metal halophosphate activated with divalent europium, represented by the general formula as identified above, which has the emission peak at the wavelength region of 480 to 500 nm, and a phosphor (ii) having the emission peak at the wavelength region of 620 to 640 nm and having the half width of 120 to 160 nm, said mixture being coated inside of a glass tube.
Inventors
- 👤 Akira Taya
- 👤 Kazuo Narita
- 👤 Jun-Etsu Akiyama
- 👤 Masao Asada
- 👤 Hisami Nira
- 👤 Yoshio Room No. 103 Sasayama-Danchi 103 Kimura
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 07:49
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/77; C09K11/7728; C09K11/7737; C09K11/7738; C09K11/7739; C09K11/70; C09K11/71; H; H01; H01J; H01J61/00; H01J61/02; H01J61/38; H01J61/42; H01J61/44
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
50 words
A blue-green emitting halophosphate phosphor activated with divalent europium, which is represented by the general formula: wherein M consists of barium (Ba), calcium (Ca) and magnesium (Mg); X is one or more of fluorine (F), chlorine (Cℓ) or bromine (Br); and x is a positive value of less than 5.
Claim 2
Dependent Claim
50 words
A blue-green emitting halophosphate phosphor activated with divalent europium, which is represented by the general formula: wherein M consists of barium (Ba), calcium (Ca) and magnesium (Mg); X is one or more of fluorine (F), chlorine (Cℓ) or bromine (Br); and x is a positive value of less than 5.
Claim 3
Dependent Claim
41 words
The phosphor according to Claim 1, wherein said M consists of 3 to 4.5 gram-atom of Ba, 0.5 to 2 gram-atom of Ca and 0.01 to 1 gram-atom of Mg, and x is more than 0.01 and not more than 0.2.
Claim 4
Dependent Claim
20 words
The phosphor according to Claim 2, wherein said Mg is contained in the amount of 0.1 to 0.5 gram-atom. .
Claim 5
Dependent Claim
19 words
The phosphor according to Claim 3, wherein said Mg is contained in the amount of 0.15 to 0.3 gram-atom.
Claim 6
Dependent Claim
11 words
The phosphor according to Claim 1, wherein said X is Cℓ.
Claim 7
Dependent Claim
68 words
A fluorescent lamp which comprises a mixture of a phosphor (i) which is the phosphor as claimed in Claim 1 having the emission peak at the wavelength region of 480 to 500 nm, and a phosphor (ii) having the emission peak at the wavelength region of 620 to 640 nm and the half width of 120 to 160 nm, said mixture being coated inside of a glass tube.
Claim 8
Dependent Claim
62 words
The fluorescent lamp according to Claim 6, wherein said phosphor (i) is represented by the general formula: wherein M consists of Ba, Ca and Mg, containing 3 to 4.5 gram-atom of Ba, 0.5 to 2 gram-atom of Ca and 0.01 to 1 gram-atom of Mg each; X is one or more of F, Cℓ or Br; and 0.01< x <0. 2 .
Claim 9
Dependent Claim
20 words
The fluorescent lamp according to Claim 7, wherein said Mg is contained in the amount of 0.1 to 0.5 gram-atom.
Claim 10
Dependent Claim
20 words
The fluorescent lamp according to Claim 8, wherein said Mg is contained in the amount of 0.15 to 0.3 gram-atom.
Claim 11
Dependent Claim
12 words
The fluorescent lamp according to Claim 6, wherein said X is C&.
Claim 12
Dependent Claim
18 words
The fluorescent lamp according to Claim 6, wherein said phosphor (ii) is strontium-magnesium orthophosphate phosphor activated with tin.
References Cited (Backward Citations)
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