US6197218B1
Expired / Lapsed
US
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Photoluminescent phosphor powders, methods for making phosphor powders and devices incorporating same
Assignee: SICPA Holding SA
•
Filing: 1998-08-27
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Granted: 2001-03-06
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Expires: 2018-08-27
Abstract
Abstract Photoluminescent phosphor powders and a method for making phosphor powders. The phosphor powders have a small particle size, narrow particle size distribution and are substantially spherical. The method of the invention advantageously permits the economic production of such powders. The invention also relates to improved devices, such as display devices and lighting elements, incorporating the phosphor powders.
Inventors
- 👤 Mark J. Hampden-Smith
- 👤 Toivo T. Kodas
- 👤 James Caruso
- 👤 Daniel J. Skamser
- 👤 Quint H. Powell
- 👤 Klaus Kunze
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:45
CPC Classifications
B; B01; B01J; B01J2/00; B01J2/003; B01J13/00; B01J13/02; B01J19/00; B01J19/08; B01J19/10; B01J19/24; B01J19/2405; B01J2/006; B01J2/02; B01J2/04; B24; B24B; B24B37/00; B24B37/04; B24B37/042; B24B37/044; B41; B41M; B41M3/00; B41M3/14; B41M3/144; B82; B82Y; B82Y30/00; C; C01; C01B; C01B13/00; C01B13/14; C01B13/18; C01B13/185; C01B17/00; C01B17/20; C01B33/00; C01B33/20; C01G; C01G15/00; C01G15/006; C01G23/00; C01G23/003; C01G23/006; C01G25/00; C04; C04B; C04B35/00; C04B35/01; C04B35/44; C04B35/622; C04B35/626; C04B35/62605; C04B35/62625; C04B35/6263; C04B35/62645; C04B35/6265; C04B35/62655; C04B35/62675; C04B35/6268; C09; C09G; C09G1/00; C09G1/02; C09K; C09K11/00; C09K11/02; C09K11/025; C09K11/08; C09K11/0805; C09K11/0877; C09K11/56; C09K11/562; C09K11/565; C09K11/567; C09K11/58; C09K11/582; C09K11/584; C09K11/59; C09K11/592; C09K11/595; C09K11/61; C09K11/611; C09K11/612; C09K11/62; C09K11/621; C09K11/623; C09K11/625; C09K11/64; C09K11/641; C09K11/642; C09K11/643; C09K11/644; C09K11/66; C09K11/661; C09K11/662; C09K11/666; C09K11/67; C09K11/671; C09K11/672; C09K11/77; C09K11/7701; C09K11/7708; C09K11/7715; C09K11/7716; C09K11/7718; C09K11/7728; C09K11/7729; C09K11/7731; C09K11/7734; C09K11/7743; C09K11/7744; C09K11/7746; C09K11/7766; C09K11/7767; C09K11/7769; C09K11/7771; C09K11/7776; C09K11/7783; C09K11/7784; C09K11/7786; C09K11/7787; C09K11/7789; C09K11/7797; C09K3/00; C09K3/14; C09K3/1436; C09K3/1454; C09K3/1463; G; G21; G21K; G21K4/00; H; H01; H01G; H01G4/00; H01G4/002; H01G4/005; H01G4/008; H01G4/0085; H01J; H01J29/00; H01J29/02; H01J29/08; H01J29/085; H01J29/10; H01J29/18; H01J29/20; H05; H05B; H05B33/00; H05B33/12; H05B33/14; H05B33/20; H10; H10W; H10W70/00; H10W70/60; H10W70/62; H10W70/66; H10W70/666; B01J2219/00; B01J2219/00049; B01J2219/00051; B01J2219/00074; B01J2219/00105; B01J2219/00112; B01J2219/0015; B01J2219/00155; B01J2219/00159; B01J2219/00162; B01J2219/00164; B01J2219/00166; B01J2219/00171; B01J2219/00186; C01P; C01P2002/00; C01P2002/60; C01P2002/70; C01P2004/00; C01P2004/01; C01P2004/03; C01P2004/30; C01P2004/32; C01P2004/34; C01P2004/50; C01P2004/51; C01P2004/52; C01P2004/60; C01P2004/61; C01P2004/62; C01P2004/80; C01P2006/00; C01P2006/10; C01P2006/22; C01P2006/60; C01P2006/80; C04B2235/00; C04B2235/02; C04B2235/30; C04B2235/32; C04B2235/3205; C04B2235/3206; C04B2235/3215; C04B2235/3224; C04B2235/44; C04B2235/443; C04B2235/50; C04B2235/54; C04B2235/5418; C04B2235/5445; C04B2235/5463; C04B2235/5481; C04B2235/70; C04B2235/74; C04B2235/79; C04B2235/80; C04B2235/81; C04B2235/96; C04B2235/9646; C04B2235/9661; G21K2004/06; H01J2211/00; H01J2211/20; H01J2211/34; H01J2211/42; H10P; H10P52/00; H10P52/40; H10P52/403; Y; Y10; Y10S; Y10S283/00; Y10S283/901
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
74 words
A flowable medium suitable for applying photoluminescent phosphor particles onto a substrate, comprising: a) a liquid vehicle phase; and b) a functional phase dispersed throughout said vehicle phase, said functional phase comprising photoluminescent phosphor particles selected from the group consisting of yttrium-gadolinium borate, zinc silicate, barium magnesium aluminate and barium aluminate, wherein said phosphor particles are substantially spherical and have a weight average particle size of from about 0.3 μm to about 5 μm.
Claim 2
Dependent Claim
74 words
A flowable medium suitable for applying photoluminescent phosphor particles onto a substrate, comprising: a) a liquid vehicle phase; and b) a functional phase dispersed throughout said vehicle phase, said functional phase comprising photoluminescent phosphor particles selected from the group consisting of yttrium-gadolinium borate, zinc silicate, barium magnesium aluminate and barium aluminate, wherein said phosphor particles are substantially spherical and have a weight average particle size of from about 0.3 μm to about 5 μm.
Claim 3
Dependent Claim
39 words
A flowable medium as recited in claim 1 , wherein said phosphor particles have a particle size distribution wherein at least about 80 weight percent of said phosphor particles are not larger than two times said average particle size.
Claim 4
Dependent Claim
17 words
A flowable medium as recited in claim 1 , wherein said vehicle phase is an aqueous-based solution.
Claim 5
Dependent Claim
21 words
A flowable medium as recited in claim 1 , wherein said vehicle phase is an aqueous-based solution comprising a dispersing agent.
Claim 6
Dependent Claim
26 words
A flowable medium as recited in claim 1 , wherein said flowable medium comprises from about 5 to about 95 weight percent of said phosphor particles.
Claim 7
Dependent Claim
26 words
A flowable medium as recited in claim 1 , wherein said flowable medium comprises from about 50 to about 85 weight percent of said phosphor particles.
Claim 8
Dependent Claim
17 words
A flowable medium as recited in claim 1 , wherein said phosphor particles comprise barium magnesium aluminate.
Claim 9
Dependent Claim
16 words
A flowable medium as recited in claim 1 , wherein said phosphor particles comprise barium aluminate.
Claim 10
Dependent Claim
17 words
A flowable medium as recited in claim 1 , wherein said phosphor particles comprise (Y,Gd)BO 3 .
Claim 11
Dependent Claim
19 words
A flowable medium as recited in claim 1 , wherein said phosphor particles comprise Zn 2 SiO 4 .
Claim 12
Dependent Claim
15 words
A flowable medium as recited in claim 1 , wherein said liquid vehicle comprises isopropanol.
Claim 13
Dependent Claim
91 words
A paste composition suitable for applying phosphor particles onto a substrate, comprising: a) a liquid vehicle phase; and b) a functional phase dispersed throughout said vehicle phase, said functional phase comprising photoluminescent phosphor particles selected from the group consisting of yttrium-gadolinium borate, zinc silicate, barium magnesium aluminate and barium aluminate and having a weight average particle size of from about 0.3 μm to about 5 μm and a particle size distribution wherein at least about 80 weight percent of said particles are not larger than two times said average particle size.
Claim 14
Dependent Claim
91 words
A paste composition suitable for applying phosphor particles onto a substrate, comprising: a) a liquid vehicle phase; and b) a functional phase dispersed throughout said vehicle phase, said functional phase comprising photoluminescent phosphor particles selected from the group consisting of yttrium-gadolinium borate, zinc silicate, barium magnesium aluminate and barium aluminate and having a weight average particle size of from about 0.3 μm to about 5 μm and a particle size distribution wherein at least about 80 weight percent of said particles are not larger than two times said average particle size.
Claim 15
Dependent Claim
18 words
A paste composition as recited in claim 12 , wherein said phosphor particles have a substantially spherical morphology.
Claim 16
Dependent Claim
17 words
A paste composition as recited in claim 12 , wherein said phosphor particles comprise barium magnesium aluminate.
Claim 17
Dependent Claim
16 words
A paste composition as recited in claim 12 , wherein said phosphor particles comprise barium aluminate.
Claim 18
Dependent Claim
17 words
A paste composition as recited in claim 12 , wherein said phosphor particles comprise (Y,Gd)BO 3 .
Claim 19
Dependent Claim
19 words
A paste composition as recited in claim 12 , wherein said phosphor particles comprise Zn 2 SiO 4 .
Claim 20
Dependent Claim
26 words
A paste composition as recited in claim 12 , wherein said phosphor particles comprise crystallites having an average crystallite size of at least about 25 nanometers.
Claim 21
Dependent Claim
71 words
A fluorescent lighting element, comprising: a) an excitation source; and b) a phosphor powder layer comprising photoluminescent phosphor particles adapted to be stimulated by said excitation source, wherein said phosphor particles have a substantially spherical morphology, a weight average particle size of from about 0.3 μm to about 5 μm and wherein at least about 80 weight percent of said particles are not larger than two times said average particle size.
Claim 22
Dependent Claim
71 words
A fluorescent lighting element, comprising: a) an excitation source; and b) a phosphor powder layer comprising photoluminescent phosphor particles adapted to be stimulated by said excitation source, wherein said phosphor particles have a substantially spherical morphology, a weight average particle size of from about 0.3 μm to about 5 μm and wherein at least about 80 weight percent of said particles are not larger than two times said average particle size.
Claim 23
Dependent Claim
25 words
A fluorescent lighting element as recited in claim 19 , wherein said phosphor powder layer comprises a combination of phosphor particles to produce white light.
Claim 24
Dependent Claim
19 words
A fluorescent lighting element as recited in claim 19 , wherein said fluorescent lighting element is an LCD backlight.
Claim 25
Dependent Claim
17 words
A fluorescent lighting element as recited in claim 19 , wherein said excitation source comprises mercury vapor.
Claim 26
Dependent Claim
29 words
A fluorescent lighting element as recited in claim 19 , wherein said phosphor particles comprise Y 2 O 3 and from about 6 to about 9 atomic percent Eu.
Claim 27
Dependent Claim
27 words
A fluorescent lighting element as recited in claim 19 , wherein said phosphor particles comprise (Y,Gd)BO 3 and from about 14 to about 20 atomic percent Eu.
Claim 28
Dependent Claim
29 words
A fluorescent lighting element as recited in claim 19 , wherein said phosphor particles comprise Zn 2 SiO 4 and from about 0.05 to about 2 atomic percent Mn.
Claim 29
Dependent Claim
28 words
A fluorescent lighting element as recited in claim 19 , wherein said phosphor particles comprise barium magnesium aluminate and from about 6 to about 12 atomic percent Eu.
Claim 30
Dependent Claim
17 words
A fluorescent lighting element as recited in claim 19 , wherein said excitation source comprises xenon gas.
References Cited (Backward Citations)
US3541019A
Cited
US3923682A
Cited
US4451521A
Cited
US4515827A
Cited
US4544605A
Cited
US4801398A
Cited
US5166456A
Cited
US4678322A
Cited
US4719033A
Cited
US4806389A
Cited
US5132045A
Cited
US4925703A
Cited
US5358734A
Cited
US4946707A
Cited
US4948527A
Cited
US5023015A
Cited
US5051277A
Cited
US5289081A
Cited
US5126166A
Cited
US5132043A
Cited
US5314723A
Cited
US5413736A
Cited
US5644193A
Cited
US5611961A
Cited
US5811924A
Cited
WO1997026312A1
Cited
US5695685A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2004-03-05 | 2004-09-04 | 2005-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-03-05 | 2008-09-04 | 2009-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-03-05 | 2012-09-04 | 2013-03-06 | $7700.00 | Window Closed / Lapsed |