IP Library › Granted Patent US 12,230,620
Granted Patent B2
US 12,230,620 · App. 18/116,260 · Granted Feb 18, 2025

Devices compatible with night vision equipment

Inventors: James Edward Murphy (Niskayuna, NY); Samuel Joseph Camardello (Ballston Spa, NY)
Assignee: Dolby Intellectual Property Licensing, LLC
H01L25/167B60R11/02G02B23/12G06F1/1613G09G3/2003G09G3/3406H01L33/0062H01L33/502B60R2011/0005
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Quick Facts
Patent No.
US 12,230,620
App. No.
18/116,260
Granted
Feb 18, 2025
Kind
B2
Abstract

The present disclosure relates to a device used in conjunction with night vision equipment. The device including an LED light source optically coupled and/or radiationally connected to a phosphor material including a green-emitting phosphor and a red-emitting 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. The device limits emission of wavelengths longer than 650 nm to less than 1.75% of total emission. A device including an LED light source optically coupled and/or radiationally connected to a red-emitting phosphor including Na 2 SiF 6 :Mn 4+ is also provided.

Claims (26)

1. A device used in conjunction with night vision equipment, the device comprising an LED light source optically coupled and/or radiationally connected to a phosphor material comprising a green-emitting phosphor and a red-emitting 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; and wherein the device limits emission of wavelengths longer than 650 nm to less than 1.75% of total emission.

2. The device according to claim 1 , wherein the red-emitting phosphor is K 2 SiF 6 :Mn 4+ or Na 2 SiF 6 :Mn 4+ .

3. A device according to claim 1 wherein the green-emitting phosphor material comprises a sulfide phosphor, uranium-doped phosphor or quantum dot material.

4. A device according to claim 3 , wherein the uranium-doped phosphor comprises phosphors selected from the group consisting of γ-Ba 2 UO 2 (PO 4 ) 2 , (Ba, Zn, Mg, UO 2 ) 3 (PO 4 ) 2 , Ba(UO 2 )P 2 O 7 , BaMgUO 2 (PO 4 ) 2 , BaZnUO 2 (PO 4 ) 2 , Ba 3 (PO 4 ) 2 (UO 2 ) 2 P 2 O 7 , Ba 2 Sr(PO 4 ) 2 (UO 2 ) 2 P 2 O 7 , BaSr 2 (PO 4 ) 2 (UO 2 ) 2 P 2 O 7 , Sr 3 (PO 4 ) 2 (UO 2 ) 2 P 2 O 7 , Ca 3 (PO 4 ) 2 (UO 2 ) 2 P 2 O 7 , BaMg 2 (PO 4 ) 2 (UO 2 ) 2 P 2 O 7 , Ba 2 UO 2 (VO 4 ) 2 , RbMgPO 4 :U 6+ , BaZn 2 (PO 4 ) 2 :U 6+ , BaBPO 5 :U 6+ , Ba 6 Al 5 P 5 O 26 :U 6+ , Sr 3 B 2 O 6 :U 6+ , Ba 2 Mg(PO 4 ) 2 (UO 2 ) 2 P 2 O 7 :U 6+ and Ba 3 (UO 2 ) 2 P 2 O 7 (PO 4 ) 2 .

5. A device according to claim 3 , wherein the quantum dot material comprises perovskite.

6. A lighting apparatus comprising the device of claim 1 .

7. A backlight apparatus comprising the device of claim 1 .

8. A device used in conjunction with night vision equipment, the device comprising an LED light source optically coupled and/or radiationally connected to a phosphor material including a red-emitting phosphor having the formula Na 2 SiF 6 :Mn 4+ , wherein the device limits emission of wavelengths longer than 650 nm to no more than 1.0% of total emission.

9. A single mode display used in conjunction with night vision equipment and compatible with day lighting and night lighting, the single mode display comprising the backlight apparatus of claim 7 , and in the absence of an NVIS filter.

10. A single mode display compatible with night vision equipment and day lighting, the single mode display comprising the backlight apparatus of claim 7 , and an NVIS filter having an optical density of 1.0 or less.

11. A display compatible with day lighting and compatible with night vision equipment, the display comprising the backlight apparatus of claim 7 , wherein a color gamut in day lighting decreases by less than 20% when in use with night vision equipment.

12. A television comprising the backlight apparatus of claim 7 .

13. A mobile phone comprising the backlight apparatus of claim 7 .

14. A computer monitor comprising the backlight apparatus of claim 7 .

15. A tablet computer comprising the backlight apparatus of claim 7 .

16. A laptop comprising the backlight apparatus of claim 7 .

17. A notebook computer comprising the backlight apparatus of claim 7 .

18. A vehicular display comprising the backlight apparatus of claim 7 .

19. A night vision display comprising the backlight apparatus of claim 7 .

20. A display compatible with day lighting and compatible with night vision equipment, the display comprising a backlight apparatus comprising a device used in conjunction with night vision equipment, the device comprising an LED light source optically coupled and/or radiationally connected to a phosphor material including a red-emitting phosphor having the formula Na 2 SiF 6 :Mn 4+ , wherein the device limits emission of wavelengths longer than 650 nm to no more than 1.0% of total emission, and wherein (1) a color gamut in day lighting decreases by less than 20% when in use with night vision equipment; (2) the backlight apparatus produces a white light and a color shift in a red spectrum decreases by less than 10% when in use with night vision equipment; or (3) a brightness in day lighting decreases by no more than 25% when in use with night vision equipment.

21. A lighting apparatus comprising the device of claim 8 .

22. A backlight apparatus comprising the device of claim 8 .

23. A display compatible with day lighting and compatible with night vision equipment, the display comprising the backlight apparatus of claim 7 , wherein the backlight apparatus produces a white light and a color shift in a red spectrum decreases by less than 10% when in use with night vision equipment.

24. A display compatible with day lighting and compatible with night vision equipment, the display comprising the backlight apparatus of claim 7 , wherein a brightness in day lighting decreases by no more than 25% when in use with night vision equipment.

Assignments (4)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Feb 20, 2025
From: DOLBY INTELLECTUAL PROPERTY LICENSING, LLC
To: EDISON INNOVATIONS, LLC
Reel/Frame 070293/0273 →
CHANGE OF NAME Recorded Dec 10, 2024
From: GE INTELLECTUAL PROPERTY LICENSING, LLC
To: DOLBY INTELLECTUAL PROPERTY LICENSING, LLC
Reel/Frame 069562/0802 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Oct 31, 2024
From: GENERAL ELECTRIC COMPANY
To: GE INTELLECTUAL PROPERTY LICENSING, LLC
Reel/Frame 069095/0458 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Mar 3, 2023
From: MURPHY, JAMES EDWARD; CAMARDELLO, SAMUEL JOSEPH
To: GENERAL ELECTRIC COMPANY
Reel/Frame 062871/0463 →
Continuity (4)
Continuation PCTUS2021048535 · Aug 31, 2021
Continuation In Part PCTUS2021027105 · Apr 13, 2021
Provisional Application 63073386 · Sep 1, 2020
Related Publication 20230246013A1 · Aug 3, 2023
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