QUANTUM DOT CONTAINING LIGHT MODULE

• US 20150085490A1
• Filed: 06/20/2012
• Published: 03/26/2015
• Est. Priority Date: 06/20/2011
• Status: Active Grant

• Current Assignee: Tectus Corporation
• Original Assignee: Crystalplex Corporation
• Inventors: Miller, Gregory D., Freeman, William R.
• Granted Patent: US 10,539,297 B2
• Time in Patent Office: Days
• US Class Current: 362/259
• CPC Class Codes: C09K 11/02 Use of particular materials as binders, particle coatings or suspension media therefor
• CPC Class Codes: C09K 11/70 containing phosphorus
• CPC Class Codes: C09K 11/7492 Arsenides; Nitrides; Phosphides
• CPC Class Codes: C09K 11/883 with zinc or cadmium
• CPC Class Codes: F21K 9/64 using wavelength conversion means distinct or spaced from the light-generating element, e.g. a remote phosphor layer
• CPC Class Codes: F21V 13/08 the elements being filters or photoluminescent elements and reflectors
• CPC Class Codes: F21V 13/14 the elements being filters or photoluminescent elements, reflectors and refractors
• CPC Class Codes: F21V 9/30 Elements containing photoluminescent material distinct from or spaced from the light source shades F21V1/17; globes, bowls or cover glasses F21V3/08, F21V3/12; refractors F21V5/10; reflectors F21V7/26, F21V7/30; elements with provision for controlling the spectral properties or intensity F21V9/40
• CPC Class Codes: F21V 9/32 characterised by the arrangement of the photoluminescent material
• CPC Class Codes: F21V 9/38 Combination of two or more photoluminescent elements of different materials
• CPC Class Codes: H01L 33/502 Wavelength conversion materials
• CPC Class Codes: H01L 33/505 characterised by the shape, e.g. plate or foil

Abstract

Light modules for converting the wavelength of light are described herein along with methods for using and making such modules and devices incorporating such modules.

Claims

1. A light module comprising:

a first substrate;

a conversion layer adjacent to the first substrate and contacting the first substrate, the conversion layer comprising at least one quantum dot/nanocrystal and a matrix material; and

a second substrate adjacent to the conversion layer and contacting the conversion layer on a surface opposite the surface contacting the first substrate.

2. The light module of claim 1, wherein matrix material comprises the a polymer matrix in which the at least one quantum dot/nanocrystal is embedded.

3. The light module of claim 1, wherein the conversion layer further comprises at least one scattering particle.

4. The light module of claim 1, wherein at least one of the conversion layer, first substrate layer, or second substrate layer is textured, patterned, coated, chemically modified, or combinations thereof.

5. The light module of claim 1, further comprising intermediate layer comprises a diffusing layer positioned and arranged to increase the path length of light entering the conversion layer.

6. The light module of claim 5, wherein the diffusion layer comprises a photonic crystal film.

7. The light module of claim 5, wherein diffusion layer is patterned.

8. The light module of claim 7, wherein the diffusion layer has a hexagonal waffle pattern.

9. The light module of claim 1, further comprising one or more reflective layers positioned and arranged to reflect light of a wavelength corresponding to the wavelength emitted by the conversion layer away from a light source.

10. The light module of claim 1, further comprising a light source.

11. The light module of claim 10, wherein the light source produces blue light.

12. The light module of claim 1, wherein the quantum dots/nanocrystals comprise an inorganic coating.

13. The light module of claim 1, wherein conversion layer comprises a plurality of quantum dots/nanocrystals dispersed throughout the matrix material.

14. The light module of claim 13, wherein the plurality of quantum dots/nanocrystals comprises two or more species of quantum dots/nanocrystals capable of emitting light at different wavelengths.

15. The light module of claim 14, wherein the two or more species of quantum dots/nanocrystals are arranged randomly.

16. The light module of claim 14, wherein the two or more species of quantum dots/nanocrystals are arranged in groups of quantum dots/nanocrystals emitting light of the same wavelength.

17. The light module of claim 16, wherein the groups of quantum dots/nanocrystals are arranged in geometric patterns selected from rows, blocks, squares, circles, ovals, or combinations thereof.

18. An optoelectric device comprising:

a light source capable of producing light having an input wavelength;

a light module comprising;

a first substrate;

a conversion layer adjacent to the first substrate and contacting the first substrate, the conversion layer comprising plurality of quantum dots/nanocrystals dispersed within a matrix material and being capable of converting the input wavelength to one or more different wavelengths of outgoing light; and

a second substrate adjacent to the conversion layer and contacting the conversion layer on a surface opposite the surface contacting the first substrate a conversion layer.

19. The optoelectric device of claim 18, wherein the source of light waves is selected from an light emitting diode (LED), incandescent bulb, fluorescent bulb, laser, electrolumiscent, or combination thereof.

20. The optoelectric device of claim 18, wherein the optoelectric device is a solid state light source.

21. The optoelectric device of claim 18, wherein the plurality of quantum dots/nanocrystals comprises two or more species of quantum dots/nanocrystals capable of emitting light at different wavelengths.

22. The optoelectric device of claim 18, further comprising a second light module having a conversion layer comprising plurality of quantum dots/nanocrystals dispersed within a matrix material and being capable of converting the input wavelength to a wavelength of outgoing light other than the one or more wavelengths of outgoing light converted by the light module.

23. The optoelectric device of claim 22, wherein the light module converts input light to red output light and the second light module converts input light to green output light.