Light-emitting diode (LED) devices comprising nanocrystals

Patent metadata

Field	Value
Publication number	US-9677001-B2
Application number	US-201313750131-A
Country	US
Kind code	B2
Filing date	Jan 25, 2013
Priority date	Mar 19, 2007
Publication date	Jun 13, 2017
Grant date	Jun 13, 2017

Abstract

The present invention provides light-emitting diode (LED) devices comprises compositions and containers of hermetically sealed luminescent nanocrystals. The present invention also provides displays comprising the LED devices. Suitably, the LED devices are white light LED devices.

First claim

What is claimed is:

1. A method comprising:
dispersing luminescent nanocrystals in aminosilicone to form a first mixture;
introducing the first mixture into a container comprising a glass or plastic material;
adding a cross-linker to the first mixture in the container to form a second mixture;
curing the second mixture in the container; and
hermetically sealing the container.

2. The method of claim 1 , wherein the dispersing further comprises dispersing the luminescent nanocrystals comprising CdSe or ZnS.

3. The method of claim 1 , wherein the dispersing further comprises dispersing the luminescent nanocrystals comprising CdSe/ZnS, InP/ZnS, PbSe/PbS, CdSe/CdS, CdTe/CdS, or CdTe/ZnS.

4. The method of claim 1 , wherein the introducing of the first mixture comprises drawing the first mixture into the container with a vacuum or suction mechanism.

5. The method of claim 1 , wherein the container comprises a glass or plastic capillary.

6. The method of claim 1 , wherein the introducing of the first mixture comprises drawing the first mixture into a glass or plastic capillary with a vacuum or suction mechanism.

7. The method of claim 5 , further comprising providing the glass or plastic capillary having at least one dimension of about 100 μm to about 1 mm.

8. The method of claim 1 , wherein the hermetically sealing of the container comprises heat sealing the container.

9. The method of claim 1 , wherein the hermetically sealing of the container comprises adhesive bonding the container.

10. The method of claim 1 , wherein the hermetically sealing of the container comprises sealing an end of the container with a filled epoxy or a liquid crystalline polymer.

11. The method of claim 1 , wherein the introducing of the first mixture comprises applying a reduced pressure to an end of the container to draw the first mixture into the container.

12. The method of claim 1 , further comprising optically coupling the hermetically sealed container to at least one LED device.

13. The method of claim 1 , further comprising optically coupling the hermetically sealed container to at least two LED devices.

14. The method of claim 13 , wherein the hermetically sealed container is spaced apart from the at least two LED devices.

15. The method of claim 1 , wherein the luminescent nanocrystals emit green light or red light.

Assignees

• Nanosys Inc

Inventors

• Dubrow Robert S
• Chen Jian
• Hardev Veeral D
• Hofler H Jurgen
• Lee Ernest

Classifications

• H05B33/04

  Sealing arrangements {, e.g. against humidity} · CPC title

• C09K11/565

  with zinc cadmium · CPC title

• H01L2924/0002

  Electricity · mapped topic

• G02B6/0041

  provided in the bulk of the light guide · CPC title

• Y02B20/181

  Cross-Sectional Technologies · mapped topic