IP Library › Granted Patent US 12,360,306
Granted Patent B2
US 12,360,306 · App. 18/532,308 · Granted Jul 15, 2025

Devices containing a remote phosphor package with red line emitting phosphors and green emitting quantum dots

Inventor: James Edward Murphy (Beachwood, OH)
Assignee: Current Lighting Solutions, LLC
G02B6/005G02B6/0023G02F1/133615C09K11/617G02F2202/36
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Quick Facts
Patent No.
US 12,360,306
App. No.
18/532,308
Granted
Jul 15, 2025
Kind
B2
Abstract

A remote phosphor package according to the present invention includes a green emitting quantum dot material and a Mn 4+ doped phosphor of formula I, dispersed in a host matrix A x [MF y ]:Mn 4+    I wherein A is Li, Na, K, Rb, Cs, or combinations thereof; M is Si, Ge, Sn, Ti, Zr, Al, Ga, In, Sc, Y, La, Nb, Ta, Bi, Gd, or combinations thereof; x is an absolute value of a charge of the [MF y ] ion; and y is 5, 6 or 7.

Claims (27)

1. A backlight unit comprising an LED light source and a remote phosphor package radiationally coupled to an LED light source; the remote phosphor package comprising a green emitting quantum dot material and a Mn4+doped phosphor of formula I, dispersed in a host matrix, and a green emitting phosphor material which does not include the green emitting quantum dot material,

A x [MF y ]:Mn 4+   I

wherein

A is Li, Na, K, Rb, Cs, or combinations thereof;

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

x is an absolute value of a charge of the [MFy] ion; and

y is 5, 6 or 7.

2. The backlight unit of claim 1 , wherein the backlight unit is in a direct lit backlight unit configuration.

3. The backlight unit of claim 1 , wherein the light emitted by the LED light source travels through one or more media external to the remote phosphor package to radiationally couple the LED light source to the remote phosphor package.

4. The backlight unit of claim 1 , wherein the LED light source is directly arranged to provide light to a diffuser plate.

5. The backlight unit of claim 4 , wherein the diffuser plate supports a diffuser film.

6. The backlight unit of claim 1 , wherein the color stable Mn4+doped phosphor is K 2 SiF 6 :Mn 4+ .

7. The backlight unit of claim 1 , wherein the quantum dot material comprises CdSe or InP.

8. An electronic device comprising a backlight unit according to claim 1 .

9. A display device comprising a backlight unit according to claim 1 .

10. A mobile display device comprising a backlight unit according to claim 1 .

11. The backlight unit of claim 1 , wherein the remote phosphor package is formed in a shape of a film thereby forming a phosphor film.

12. The backlight unit of claim 11 , wherein the LED light source is arranged to provide light to a diffuser structure in direct contact with the phosphor film.

13. The backlight unit of claim 12 , wherein the diffuser structure comprises a diffuser plate and a diffuser film.

14. The backlight unit of claim 12 , wherein after light departs from the LED light source, such light first crosses the diffuser structure prior to crossing any other solid structure.

15. The backlight unit of claim 12 , wherein the diffuser structure is in a shape of one or more films.

16. The backlight unit of claim 13 , wherein the diffuser plate is in a shape of a film, and the diffuser film is in a shape of a film, and wherein the diffuser film is in direct contact with the phosphor film.

17. The backlight unit of claim 13 , wherein the diffuser plate supports the diffuser film.

18. The backlight unit of claim 1 , wherein the LED light source is a blue LED.

19. The backlight unit of claim 1 , wherein the LED light source is a plurality of blue LEDs.

20. The backlight unit of claim 1 , wherein the green emitting quantum dot material comprises a group II-VI compound, a group III-V compound, a group IV compound, a group I-III-VI 2 compound or a mixture thereof.

21. The backlight unit of claim 13 , wherein the LED light source is arranged to directly provide light to the diffuser plate.

Assignments (4)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 22, 2025
From: GENERAL ELECTRIC COMPANY
To: CURRENT LIGHTING SOLUTIONS, LLC
Reel/Frame 070906/0892 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 22, 2025
From: MURPHY, JAMES EDWARD
To: GENERAL ELECTRIC COMPANY
Reel/Frame 070907/0007 →
SECOND LIEN INTELLECTUAL PROPERTY SECURITY AGREEMENT SUPPLEMENT Recorded Apr 8, 2024
From: HLI SOLUTIONS, INC; CURRENT LIGHTING SOLUTIONS, LLC
To: ATLANTIC PARK STRATEGIC CAPITAL FUND, L.P., AS COLLATERAL AGENT
Reel/Frame 067026/0974 →
SECURITY AGREEMENT Recorded Mar 26, 2024
From: HLI SOLUTIONS, INC.; CURRENT LIGHTING SOLUTIONS, LLC
To: ALLY BANK AS AGENT
Reel/Frame 066894/0876 →
Continuity (4)
Continuation 16936968 · Jul 23, 2020
Continuation 15370762 · Dec 6, 2016
Provisional Application 62304572 · Mar 7, 2016
Related Publication 20240295684A1 · Sep 5, 2024
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