US4307320A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pigment coated phosphor and high contrast color television cathode ray tube using same
Assignee: Mitsubishi Chemical Corp
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Filing: 1979-06-19
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Granted: 1981-12-22
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Expires: 1999-06-19
Abstract
Abstract Pigment coated phosphors comprising a europium activated yttrium oxysulfide phosphor having a europium activator value within a range of 0.04 gram atom to 0.066 gram atom per 1 mol of yttrium oxysulfide having adhered thereto red colored pigment particles such as cadmium sulfoselenide pigment particles, rouge pigment particles or red lead pigment particles, in respective amounts of 0.1 to 2.0 wt %, 0.05 to 2.0 wt % or 0.1 to 12 wt %, based upon the europium activated yttrium oxysulfide phosphor; and a cathode ray tube for high contrast color television using as a red emitting phosphor at least one of the three pigment coated phosphors.
Inventors
- 👤 Noboru Kotera
- 👤 Thihiro Yoshida
- 👤 Toshiaki Hatsumi
- 👤 Kazuhito Iwasaki
- 👤 Isao Iwamoto
- 👤 Katuzo Kanda
- 👤 Seiji Murakami
- 👤 Shusaku Eguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:01
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/77; C09K11/7783; C09K11/7784; C09K11/7787; C09K11/7789; C09K11/02; C09K11/025
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
80 words
A pigment coated phosphor for a color television cathode ray tube comprising a europium activated yttrium oxysulfide phosphor having a europium activator value in a range of from 0.04 gram atom to 0.066 gram atom per 1 mol of yttrium oxysulfide having adhered to the surface thereof cadmium sulfoselenide pigment particles, the amount of said adhered cadmium sulfoselenide pigment particles being in a range of 0.1 wt % to 2.0 wt % based upon said europium activated yttrium oxysulfide phosphor.
Claim 2
Dependent Claim
80 words
A pigment coated phosphor for a color television cathode ray tube comprising a europium activated yttrium oxysulfide phosphor having a europium activator value in a range of from 0.04 gram atom to 0.066 gram atom per 1 mol of yttrium oxysulfide having adhered to the surface thereof cadmium sulfoselenide pigment particles, the amount of said adhered cadmium sulfoselenide pigment particles being in a range of 0.1 wt % to 2.0 wt % based upon said europium activated yttrium oxysulfide phosphor.
Claim 3
Dependent Claim
70 words
A pigment coated phosphor for a color television cathode ray tube as defined in claim 1 wherein the reflectances of said cadmium sulfoselenide pigment particles at wavelengths of no more than 570 nm, 600 nm, 650 nm and 700 nm are no more than 10%, no more than 50%, 55 to 85%, and 60 to 90%, respectively when the reflectance of a magnesium oxide diffusion plate is taken as 100%.
Claim 4
Dependent Claim
56 words
A pigment coated phosphor for a color television cathode ray tube as defined in claim 1 wherein said europium activator value is in a range of from 0.044 gram atom to 0.06 gram atom and said amount of the cadmium sulfoselenide pigment particles is in a range of from 0.3 wt % to 1.0 wt %.
Claim 5
Dependent Claim
49 words
A pigment coated phosphor for a color television cathode ray tube as defined in claim 1 wherein the average particle size of said europium activated yttrium oxysulfide phosphor ranges from 3μ to 15μ and the average particle size of said cadmium sulfoselenide pigment particles ranges from 0.1μ to 1μ.
Claim 6
Dependent Claim
49 words
A pigment coated phosphor for a color television cathode ray tube as defined in claim 4 wherein the average particle size of said europium activated yttrium oxysulfide phosphor ranges from 4μ to 12μ and the average particle size of said cadmium oxysulfide pigment particles ranges from 0.2μ to 0.5μ.
Claim 7
Dependent Claim
78 words
A pigment coated phosphor for a color television cathode ray tube comprising a europium activated yttrium oxysulfide phosphor having a europium activator value in a range of from 0.04 gram atom to 0.066 gram atom per 1 mol of yttrium oxysulfide having adhered to the surface thereof rouge pigment particles, the amount of said adhered rouge pigment particles being in a range of 0.05 wt % to 2.0 wt % based upon said europium activated yttrium oxysulfide phosphor.
Claim 8
Dependent Claim
78 words
A pigment coated phosphor for a color television cathode ray tube comprising a europium activated yttrium oxysulfide phosphor having a europium activator value in a range of from 0.04 gram atom to 0.066 gram atom per 1 mol of yttrium oxysulfide having adhered to the surface thereof rouge pigment particles, the amount of said adhered rouge pigment particles being in a range of 0.05 wt % to 2.0 wt % based upon said europium activated yttrium oxysulfide phosphor.
Claim 9
Dependent Claim
72 words
A pigment coated phosphor for a color television cathode ray tube as defined in claim 6 wherein the reflectances of said rouge pigment particles at wavelengths of not more than 550 nm, 550 nm, 600 nm, 650 nm and 700 nm are no more than 10%, 5 to 15%, 10 to 30%, 13 to 40% and 18 to 50% when the reflectance of a magnesium oxide diffusion plate is taken as 100%.
Claim 10
Dependent Claim
53 words
A pigment coated phosphor for a color television cathode ray tube as defined in claim 6 wherein said europium activator value is in a range of 0.044 gram atom to 0.06 gram atom and said amount of the rouge pigment particles is in a range of 0.1 wt % to 1.0 wt %.
Claim 11
Dependent Claim
48 words
A pigment coated phosphor for a color television cathode ray tube as defined in claim 6 wherein the average particle size of said europium activated yttrium oxysulfide phosphor ranges from 3μ to 15μ and the average particle size of said rouge pigment particles ranges from 0.1μ to 1μ.
Claim 12
Dependent Claim
48 words
A pigment coated phosphor for a color television cathode ray tube as defined in claim 9 wherein the average particle size of said europium activated yttrium oxysulfide phosphor ranges from 4μ to 12μ and the average particle size of said rouge pigment particles ranges from 0.2μ to 0.5μ.
Claim 13
Dependent Claim
80 words
A pigment coated phosphor for a color television cathode ray tube comprising a europium activated yttrium oxysulfide phosphor having a europium activator value in a range of from 0.04 gram atom to 0.066 gram atom per 1 mol of yttrium oxysulfide having adhered to the surface thereof red lead pigment particles, the amount of said adhered red lead pigment particles being in a range of 0.1 wt % to 12 wt % based upon said europium activated yttrium oxysulfide phosphor.
Claim 14
Dependent Claim
80 words
A pigment coated phosphor for a color television cathode ray tube comprising a europium activated yttrium oxysulfide phosphor having a europium activator value in a range of from 0.04 gram atom to 0.066 gram atom per 1 mol of yttrium oxysulfide having adhered to the surface thereof red lead pigment particles, the amount of said adhered red lead pigment particles being in a range of 0.1 wt % to 12 wt % based upon said europium activated yttrium oxysulfide phosphor.
Claim 15
Dependent Claim
78 words
A pigment coated phosphor for a color television cathode ray tube as defined in claim 11 wherein the reflectances of said red lead pigment particles at wavelengths of not more than 500 nm, 500 nm, 550 nm, 600 nm, 650 nm and 700 nm are no more than 10%, 5 to 10%, 10 to 15%, 55 to 75%, 70 to 90% and 75 to 95% when the reflectance of a magnesium oxide diffusion plate is taken as 100%.
Claim 16
Dependent Claim
54 words
A pigment coated phosphor for a color television cathode ray tube as defined in claim 11 wherein said europium activator value is in a range of 0.044 gram atom to 0.06 gram atom and said amount of the red lead pigment particles is in a range of 2.0 wt % to 10 wt %.
Claim 17
Dependent Claim
49 words
A pigment coated phosphor for a color television cathode ray tube as defined in claim 11 wherein the average particle size of said europium activated yttrium oxysulfide phosphor ranges from 3μ to 15μ and the average particle size of said red lead pigment particles ranges from 0.1μ to 1.5μ.
Claim 18
Dependent Claim
49 words
A pigment coated phosphor for a color television cathode ray tube as defined in claim 14 wherein the average particle size of said europium activated yttrium oxysulfide phosphor ranges from 4μ to 12μ and the average particle size of said red lead pigment particles ranges from 0.2μ to 1.0μ.
Claim 19
Dependent Claim
200 words
A cathode ray tube for high contrast color television using as a red emitting phosphor at least one selected from (1) a pigment coated phosphor comprising a europium activated yttrium oxysulfide phosphor having a europium activator value in a range of from 0.04 gram atom to 0.066 gram atom per 1 mol of yttrium oxysulfide having adhered to the surface thereof cadmium sulfoselenide pigment particles, the amount of said cadmium sulfoselenide pigment particles adhered thereto being in a range of 0.1 wt % to 2.0 wt % based on said europium activated yttrium oxysulfide phosphor, (2) a pigment coated phosphor comprising the same europium activated yttrium oxysulfide phosphor having adhered to the surface thereof rouge pigment particles, the amount of said rouge pigment particles adhered thereto being in a range of 0.05 wt % to 2.0 wt % based on said europium activated yttrium oxysulfide phosphor, and (3) a pigment coated phosphor comprising the same europium activated yttrium oxysulfide phosphor having adhered to the surface thereof red lead pigment particles, the amount of said red lead pigment particles adhered thereto being in a range of 0.1 wt % to 12 wt % based on said europium activated yttrium oxysulfide phosphor.
Claim 20
Dependent Claim
200 words
A cathode ray tube for high contrast color television using as a red emitting phosphor at least one selected from (1) a pigment coated phosphor comprising a europium activated yttrium oxysulfide phosphor having a europium activator value in a range of from 0.04 gram atom to 0.066 gram atom per 1 mol of yttrium oxysulfide having adhered to the surface thereof cadmium sulfoselenide pigment particles, the amount of said cadmium sulfoselenide pigment particles adhered thereto being in a range of 0.1 wt % to 2.0 wt % based on said europium activated yttrium oxysulfide phosphor, (2) a pigment coated phosphor comprising the same europium activated yttrium oxysulfide phosphor having adhered to the surface thereof rouge pigment particles, the amount of said rouge pigment particles adhered thereto being in a range of 0.05 wt % to 2.0 wt % based on said europium activated yttrium oxysulfide phosphor, and (3) a pigment coated phosphor comprising the same europium activated yttrium oxysulfide phosphor having adhered to the surface thereof red lead pigment particles, the amount of said red lead pigment particles adhered thereto being in a range of 0.1 wt % to 12 wt % based on said europium activated yttrium oxysulfide phosphor.
Claim 21
Dependent Claim
188 words
A cathode ray tube for high contrast color television as defined in claim 16 wherein at least one selected from a copper and aluminum activated zinc sulfide phosphor, a copper activated zinc sulfide phosphor, a copper and aluminum activated zinc cadmium sulfide phosphor wherein the cadmium sulfide content is 1 to 15 wt % based on the host material, a copper activated zinc cadmium sulfide phosphor wherein the cadmium sulfide content is 0.1 to 10 wt % based on the host material, a gold, copper and aluminum activated zinc sulfide phosphor and a silver activated zinc cadmium sulfide phosphor wherein the cadmium sulfide content is 30 to 50 wt % based on the host material is employed as a green-emitting phosphor; and at least one selected from a pigment coated phosphor comprising a silver activated zinc sulfide phosphor having adhered to the surface thereof cobalt blue pigment particles and/or marine blue pigment particles and a pigment coated phosphor comprising a silver and aluminum activated zinc sulfide having adhered to the surface thereof cobalt blue pigment particles and/or marine blue pigment particles is employed as a blue emitting phosphor.
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) | 1984-12-21 | 1985-06-22 | 1985-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-21 | 1989-06-22 | 1989-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-21 | 1993-06-22 | 1993-12-22 | $7700.00 | Window Closed / Lapsed |