Granted Patent B2

US 12,331,208 · App. 18/150,675 · Granted Jun 17, 2025

Inventors: Mark D. Doherty (Niskayuna, NY); Yangang Liang (Niskayuna, NY); Jie Jerry Liu (Niskayuna, NY); Samuel Joseph Camardello (Ballston Spa, NY); James Edward Murphy (Niskayuna, NY)

Assignee: EDISON INNOVATIONS, LLC

C09D11/38C09D11/322C09K11/025C09K11/617C09K11/71C09K11/717F21V9/30G02B6/0053G02B6/0073G02F1/133603G02F1/133617G03F7/0042H10H20/8512C08K2003/328C08K3/34C08K2201/001C08K2201/005F21Y2115/10H10H20/882

Abstract

Claims (54)

1. A film prepared by printing an ink composition on a substrate and drying or curing the ink composition, wherein the ink composition comprises a binder material and at least one narrow band emission phosphor, the narrow band emission phosphor having a D50 particle size from about 0.1 μm to about 15 μm and is selected from the group consisting of a green-emitting U 6+ -containing phosphor, a green-emitting Mn 2+ -containing phosphor, a red-emitting phosphor based on complex fluoride materials activated by Mn 4+ , and a mixture thereof, wherein the ink composition has a viscosity in the range of 0.5 centipoise to 2000 centipoise.

2. The film according to claim 1 , wherein the substrate is glass, silicon or a polymeric material.

3. The film according to claim 1 , wherein the substrate is an LED.

4. The film according to claim 3 , wherein the LED is a mini-LED or a micro-LED.

5. The film according to claim 1 , wherein the film has a thickness of no more than 250 micrometers.

6. The film according to claim 5 , wherein the film has a thickness from about 1 micrometer to about 150 micrometers.

7. The film in accordance with claim 1 , wherein the ink composition has a viscosity ranging from 35 centipoise at 25° C. to about 20 centipoise at 50° C.

8. The film according to claim 1 , wherein the at least one narrow band emission phosphor is uniformly dispersed throughout the composition.

9. The film in accordance with claim 1 , wherein the ink composition further comprises a solvent selected from the group consisting of: ethanol, water, propylene glycol methyl ether acetate, propanol, ethylene glycol, terpineol, 2-(2-Butoxyethoxy)ethyl acetate, and mixtures thereof.

10. The film according to claim 1 , wherein the film further comprises quantum dot materials or color filter pigments capable of absorbing blue light.

11. The film according to claim 10 , wherein the quantum dot materials comprise perovskite quantum dots.

12. The film in accordance with claim 1 , wherein the at least one narrow band emission phosphor is a red-emitting phosphor based on complex fluoride materials activated by Mn 4+ .

13. The film according to claim 12 , wherein the at least one narrow band emission phosphor comprises a phosphor of formula I

A x MF y :Mn 4+   I

wherein

A is Li, Na, K, Rb, Cs, or a combination thereof;

M is Si, Ge, Sn, Ti, Zr, Al, Ga, In, Sc, Hf, Y, La, Nb, Ta, Bi, Gd, or a combination thereof;

x is an absolute value of a charge of the MF y ion; and

y is 5, 6 or 7.

14. The film according to claim 13 , wherein the phosphor of formula I is K 2 SiF 6 :Mn 4+ or Na 2 SiF 6 :Mn 4+ .

15. The film according to claim 1 , wherein the at least one narrow band emission phosphor is a green-emitting Mn 2+ -containing phosphor.

16. The film according to claim 1 , wherein the at least one narrow band emission phosphor is a green-emitting U 6+ -containing phosphor.

17. The film according to claim 16 , wherein the green U 6+ -containing phosphor has the formula in (i) or (ii):

[Ba 1−a-b Sr a Ca b ] x [Mg,Zn] y (UO 2 ) z ([P,V]O 4 ) 2(x+y+z)/3 ,  (i)

where 0≤a≤1, 0≤b≤0.5, 0.75≤x≤1.25, 0.75≤y≤1.25, 0.75≤z≤1.25;

[Ba 1−a-b Sr a Ca b ] p (UO 2 ) q [P,V] r O (2p+2q+5r)/2 ,  (ii)

where 0≤a≤1, 0≤b≤1, 2.5≤p≤3.5, 1.75≤q≤2.25, 3.5≤r≤4.5.

18. The film according to claim 1 , wherein the at least one narrow band emission phosphor comprises a green-emitting U 6+ -containing phosphor selected from the group consisting of: γ-Ba 2 UO 2 (PO 4 ) 2 , [Ba, Zn,Mg](UO 2 ) 3 (PO 4 ) 2 , Ba 6 Al 5 P 5 O 26 :U 6+ , Ba(UO 2 )P 2 O 7 , Ba 3 (UO 2 ) 2 P 2 O 7 (PO 4 ) 2 , and combinations thereof.

19. The film according to claim 1 , wherein the green emitting U 6+ -containing phosphor is doped with an additional Eu 3+ activator ion.

20. A film prepared by printing an ink composition on a substrate and drying or curing the ink composition, wherein the ink composition comprises a binder material and at least one narrow band emission phosphor, the narrow band emission phosphor having a D50 particle size from about 0.1 μm to about 15 m and is selected from the group consisting of a green-emitting U 6+ -containing phosphor, a green-emitting Mn 2+ -containing phosphor, a red-emitting phosphor based on complex fluoride materials activated by Mn 4+ , and a mixture thereof, wherein the red-emitting phosphor based on complex fluoride materials activated by Mn 4+ has a Mn % of at least 1 wt %.

21. A device comprising an LED light source optically coupled and/or radiationally connected to a film prepared by printing an ink composition on the LED light source and drying or curing the ink composition, wherein the ink composition comprises a binder material and at least one narrow band emission phosphor, the narrow band emission phosphor having a D50 particle size from about 0.1 μm to about 15 μm and is selected from the group consisting of a green-emitting U 6+ -containing phosphor, a green-emitting Mn 2+ -containing phosphor, a red-emitting phosphor based on complex fluoride materials activated by Mn 4+ , and a mixture thereof, wherein the red-emitting phosphor based on complex fluoride materials activated by Mn 4+ has a Mn % of at least 1 wt %.

22. A backlight apparatus comprising the device according to claim 21 .

23. A lighting apparatus comprising the device according to claim 21 .

24. A television comprising the backlight apparatus of claim 22 .

25. A mobile phone comprising the backlight apparatus of claim 22 .

26. A computer monitor comprising the backlight apparatus of claim 22 .

27. An Automotive display comprising the backlight apparatus of claim 22 .

28. The device according to claim 21 , wherein the LED light source comprises a mini-LED or a micro-LED.

29. A film comprising a green-emitting U 6+ -containing phosphor uniformly dispersed within a binder matrix, wherein the green-emitting U 6+ -containing phosphor has a D50 particle size from about 0.1 μm to about 15 μm, and wherein the green U 6+ -containing phosphor has the formula in (i) or (ii):

[Ba 1−a-b Sr a Ca b ] x [Mg,Zn] y (UO 2 ) z ([P,V]O 4 ) 2(x+y+z)/3 ,  (i)

where 0≤a≤1, 0≤b≤0.5, 0.75≤x≤1.25, 0.75≤y≤1.25, 0.75≤z≤1.25;

[Ba 1−a-b Sr a Ca b ] p (UO 2 ) q [P,V] r O (2p+2q+5r)/2 ,  (ii)

where 0≤a≤1, 0≤b≤1, 2.5≤p≤3.5, 1.75≤q≤2.25, 3.5≤r≤4.5.

30. A film prepared by printing an ink composition on a substrate and drying or curing the ink composition, wherein the ink composition comprises a binder material, at least a red-emitting phosphor based on complex fluoride materials activated by Mn 4+ , having a D50 particle size from about 0.1 μm to about 15 μm,

wherein the ink composition being uniformly dispersed throughout the composition,

wherein the red-emitting phosphor based on complex fluoride materials activated by Mn 4+ , has a Mn % of at least 1 wt %;

wherein the film may have a thickness of no more than 250 micrometers, preferably no more than 50 micrometers; and

wherein the film is substantially free of uniformity or mura defects.

31. The film according to claim 30 , wherein the ink composition comprises a scattering agent.

32. A film prepared by printing an ink composition on a polyethylene terephthalate (PET) substrate and drying or curing the ink composition, wherein the ink composition comprises a binder material, at least a red-emitting phosphor based on complex fluoride materials activated by Mn 4+ , having a D50 particle size from about 0.1 μm to about 15 μm,

wherein the red-emitting phosphor based on complex fluoride materials activated by Mn 4+ , has a Mn % of at least 1 wt %; and

wherein the film further comprises an additional layer of PET substrate to cover the film.

33. The film according to claim 32 , wherein the film further comprises an additional layer of PET substrate to cover the film.

34. The film according to claim 32 , wherein the ink composition comprises a scattering agent.

Assignments (4)

Continuity (7)

References Cited (185)