Optical member, display device having the same and method of fabricating the same

Patent metadata

Field	Value
Publication number	US-9335459-B2
Application number	US-201214232843-A
Country	US
Kind code	B2
Filing date	Jun 8, 2012
Priority date	Jul 14, 2011
Publication date	May 10, 2016
Grant date	May 10, 2016

Abstract

Disclosed are an optical member, a display device including the same, and a method of fabricating the same. The optical member includes a host layer; a plurality of first wavelength conversion particles in the host layer; and a plurality of second wavelength conversion particles in the host layer, wherein the first wavelength conversion particles include compound semiconductors, and the second wavelength conversion particles include phosphors.

First claim

The invention claimed is:

1. An optical member comprising:
a host layer;
a plurality of first wavelength conversion particles in the host layer; and
a plurality of second wavelength conversion particles in the host layer,
wherein the first wavelength conversion particles include compound semiconductors, and the second wavelength conversion particles include phosphors,
wherein the second wavelength conversion particles have a diameter larger than a diameter of the first wavelength conversion particles.

2. The optical member of claim 1 , further comprising a plurality of dispersion enhancing particles in the host layer.

3. The optical member of claim 2 , wherein the dispersion enhancing particles include silicon oxide.

4. The optical member of claim 2 , wherein the dispersion enhancing particles have a diameter in a range of about 10 nm to about 10 μm.

5. The optical member of claim 2 , wherein the dispersion enhancing particles are contained in the host layer at a ratio of about 0.5 wt % to about 5 wt %.

6. The optical member of claim 1 , wherein the diameter of the first wavelength conversion particles is in a range of 1 nm to 50 nm and the diameter of the second wavelength conversion particles is in a range of 1 μm to 50 μm.

7. The optical member of claim 1 , wherein the first wavelength conversion particles are contained in the host layer at a ratio of about 0.5 wt % to about 5 wt %.

8. The optical member of claim 1 , wherein the first wavelength conversion particles include quantum dots.

9. The optical member of claim 1 , wherein the second wavelength conversion particles include green phosphors.

10. The optical member of claim 1 , further comprising a plurality of third wavelength conversion particles in the host layer, wherein the second wavelength conversion particles include green phosphors and the third wavelength conversion particles include yellow phosphors.

11. A display device comprising:
a light source;
a wavelength conversion member to which light emitted from the light source is incident; and
a display panel to which light output from the wavelength conversion member is incident,
wherein the wavelength conversion member comprises:
a host layer;
a plurality of first wavelength conversion particles in the host layer; and
a plurality of dispersion enhancing particles in the host layer, and
wherein the first wavelength conversion particles include compound semiconductors, and
wherein the dispersion enhancing particles have a diameter in a range of about 10 nm to about 10 μm.

12. The display device of claim 11 , further comprising a plurality of second wavelength conversion particles in the host layer.

13. The display device of claim 12 , wherein the second wavelength conversion particles have a diameter larger than a diameter of the first wavelength conversion particles.

14. The display device of claim 12 , wherein the diameter of the first wavelength conversion particles is in a range of 10 nm to 50 nm and the diameter of the second wavelength conversion particles is in a range of 1 μm to 50 μm.

15. The display device of claim 14 , wherein the first wavelength conversion particles include quantum dots and the second wavelength conversion particles include green phosphors.

16. The display device of claim 15 , further comprising a plurality of third wavelength conversion particles in the host layer, wherein the second wavelength conversion particles include green phosphors and the third wavelength conversion particles include yellow phosphors.

17. An optical member comprising:
a host layer;
a plurality of first wavelength conversion particles in the host layer; and
a plurality of dispersion enhancing particles in the host layer,
wherein the first wavelength conversion particles include compound semiconductors, and
wherein the dispersion enhancing particles have a diameter in a range of about 10 nm to about 10 μm.

18. The optical member of claim 17 , wherein the dispersion enhancing particles include inorganic materials.

19. The optical member of claim 17 , wherein the dispersion enhancing particles include oxides.

Assignees

• Kang Mun Suk
• Lg Innotek Co Ltd

Inventors

• Kang Mun Suk

Classifications

• C09K11/025

  non-luminescent particle coatings or suspension media · CPC title

• B82Y20/00

  Nanooptics, e.g. quantum optics or photonic crystals · CPC title

• G02B6/005 Primary

  provided by one optical element, or plurality thereof, placed on the light output side of the light guide · CPC title

• G02F2/02

  Frequency-changing of light, e.g. by quantum counters · CPC title

• B82Y10/00 Primary

  Nanotechnology for information processing, storage or transmission, e.g. quantum computing or single electron logic · CPC title