Light-emitting film

Patent metadata

Field	Value
Publication number	US-9761771-B2
Application number	US-201515314891-A
Country	US
Kind code	B2
Filing date	Aug 13, 2015
Priority date	Aug 14, 2014
Publication date	Sep 12, 2017
Grant date	Sep 12, 2017

Abstract

The present application relates to a light-emitting film, a method of manufacturing the same, a lighting device and a display device. The present application may provide a light-emitting film capable of providing a lighting device having excellent color purity and efficiency and an excellent color characteristic. The characteristics of the light-emitting film of the present application may be stably and excellently maintained for a long time. The light-emitting film of the present application may be used for various uses including photovoltaic applications, an optical filter or an optical converter, as well as various lighting devices.

First claim

The invention claimed is:

1. A light-emitting film, comprising:
an emulsion region dispersed in a matrix having a continuous phase; and
a light-emitting layer including light-emitting nanoparticles, which are present in the continuous phase or emulsion region.

2. The film of claim 1 , wherein the light-emitting nanoparticles are included in the emulsion region.

3. The film of claim 2 , wherein a ratio of the light-emitting nanoparticles included in the emulsion region is 90 wt % or more with respect to a total of the light-emitting nanoparticles included in the light-emitting layer.

4. The film of claim 1 , wherein the light-emitting nanoparticles are capable of absorbing light with any one wavelength in a range of 420 to 490 nm and emitting light with any one wavelength in a range of 490 to 580 nm or 580 to 780 nm.

5. The film of claim 1 , wherein the light-emitting layer are quantum dots.

6. The film of claim 1 , wherein the emulsion region is in a particle type.

7. The film of claim 6 , wherein the particle type has an average diameter in a range of 1 to 200 μm.

8. The film of claim 1 , wherein the light-emitting layer includes 5 to 40 parts by weight of the emulsion region with respect to 100 parts by weight of the matrix.

9. The film of claim 1 , wherein any one of the matrix and the emulsion region includes a polymer component having a solubility parameter of less than 10 (cal/cm 3 ) 1/2 , and the other includes a polymer component having a solubility parameter of 10 (cal/cm 3 ) 1/2 or more.

10. The film of claim 1 , wherein the matrix includes a polymerization unit of a compound of Formula 1, a compound of Formula 2, a compound of Formula 3, a compound of Formula 4, a nitrogen-containing radical polymerizable compound, or a radical polymerizable compound including an acrylic acid, a methacrylic acid or a salt thereof:

In Formula 1, Q is hydrogen or an alkyl group, U is an alkylene group, Z is hydrogen, an alkoxy group, an epoxy group or a monovalent hydrocarbon group, and m is an arbitrary number:

In Formula 2, Q is hydrogen or an alkyl group, U is an alkylene group, and m is an arbitrary number:

In Formula 3, Q is hydrogen or an alkyl group, A is an alkylene group which may be substituted with a hydroxyl group, and U is an alkylene group:

In Formula 4, Q is hydrogen or an alkyl group, A and U are each independently an alkylene group, and X is a hydroxyl group or a cyano group.

11. The film of claim 1 , wherein the emulsion region includes a polymerization unit of a compound represented by any one of Formulas 5 to 7:

In Formula 5, Q is hydrogen or an alkyl group, and B is a linear or branched alkyl group or alicyclic hydrocarbon group, which has 5 or more carbon atoms:

In Formula 6, Q is hydrogen or an alkyl group, and U is an alkylene, alkenylene, alkynylene or arylene group:

In Formula 7, Q is hydrogen or an alkyl group, U is an alkylene group, Y is a carbon atom, an oxygen atom or a sulfur atom, X is an oxygen atom, a sulfur atom or an alkylene group, Ar is an aryl group, and n is an arbitrary number.

12. The film of claim 1 , wherein the light-emitting layer further includes an antioxidant.

13. The film of claim 12 , wherein the antioxidant includes oxidizable metal particles.

14. The film of claim 12 , wherein the antioxidant is a phenol-based antioxidant, a thioether-based antioxidant, a phosphate-based antioxidant or an amine-based antioxidant.

15. A method of manufacturing the light-emitting layer of claim 1 , comprising:
polymerizing a layer including a mixture of a polymerizable compound capable of forming a polymer having a solubility parameter of 10 (cal/cm 3 ) 1/2 or more and a polymerizable compound capable of forming a polymer having a solubility parameter of less than 10 (cal/cm 3 ) 1/2 .

16. A lighting device, comprising:
a light source; and
the light-emitting film of claim 1 ,
wherein the light source and the light-emitting film are disposed such that light emitted from the light source is incident into the light-emitting film.

17. The device of claim 16 , wherein the light source emits light with any one wavelength in a range of 420 to 490 nm.

18. A display device comprising the lighting device of claim 16 .

Assignees

• Lg Chemical Ltd

Inventors

• Kwon Tae Gyun
• Ryu Su Young
• Park Moon Soo
• Lee Seong Min

Classifications

• C08F222/102

  of dialcohols, e.g. ethylene glycol di(meth)acrylate or 1,4-butanediol dimethacrylate · CPC title

• C08K2201/001

  Conductive additives · CPC title

• C09K11/08

  containing inorganic luminescent materials · CPC title

• C08K2201/011

  Nanostructured additives · CPC title

• C08K11/00

  Use of ingredients of unknown constitution, e.g. undefined reaction products · CPC title