Photosensitive composition and color converting film

Patent metadata

Field	Value
Publication number	US-11269255-B2
Application number	US-202016832357-A
Country	US
Kind code	B2
Filing date	Mar 27, 2020
Priority date	Sep 29, 2015
Publication date	Mar 8, 2022
Grant date	Mar 8, 2022

Abstract

The present invention relates to a photosensitive composition, and a color conversion film. The present invention further relates to a use of the photosensitive composition in a color conversion film fabrication process, and to a use of the color conversion film in an optical device. The invention further more relates to an optical device comprising the color conversion film and method for preparing the color conversion film and the optical device.

First claim

The invention claimed is:

1. A polymerized photosensitive composition comprising a plurality of nanosized fluorescent material, a (meth)acrylic polymer and a wetting and dispersing agent,
wherein the nanosized fluorescent material is selected from the group consisting of nanosized inorganic phosphor materials, quantum sized materials and a combination thereof, and
wherein the wetting and dispersing agent is a copolymer selected from the group consisting of graft copolymers, block copolymers, alternating copolymers, and random copolymers and comprises an anchoring group selected from the group consisting of phosphine groups, phosphine oxide groups, phosphate groups, phosphonate groups, thiol groups, tertiary amine, carboxyl groups, hetero cyclic groups, silane groups, sulfonic acids, hydroxyl groups, and phosphonic acids and wherein the copolymer comprises polymer unit A including the anchoring group, and polymer unit B that does not include any anchoring group and polymer unit B comprises a polymer chain selected from the group consisting of polyethylene glycols, polyester, polylactic acids, polyvinyl alcohols, polyvinylpyrrolidones, celluloses and derivatives thereof.

2. The polymerized photosensitive composition according to claim 1 , wherein the anchoring group of the wetting and dispersing agent is selected from the group consisting of tertiary amine, phosphine oxide groups, phosphonic acids, and phosphate groups.

3. The polymerized photosensitive composition according to claim 1 , wherein the anchoring group is a tertiary amine represented by following chemical formula (I);
—NR 1 R 2 —  (I)

wherein R 1 is an alkyl group having carbon atoms 1 to 30, or an aryl group having carbon atoms 1 to 30; R 2 is an alkyl group having carbon atoms 1 to 30, or an aryl group having carbon atoms 1 to 30; R 1 and R 2 can be same or different of each other.

4. The polymerized photosensitive composition according to claim 1 , wherein the copolymer is a block copolymer or a graft copolymer represented by following chemical formula (II) or (III);
A n -B m —  (II)

B o -A n -B m —  (III)

(where in the formulae (II) and (III), the symbol “A” represents polymer unit A including the anchoring group; the symbol “B” is taken to mean the polymer unit B that does not include any one of the anchoring group; the symbols “n”, “m”, and “o” are integer.

5. The polymerized photosensitive composition according to claim 1 , wherein the polymerized photosensitive composition comprises a polymerization initiator.

6. The polymerized photosensitive composition according to claim 1 , wherein the polymerized photosensitive composition further comprises a solvent.

7. The polymerized photosensitive composition according to claim 1 , wherein the polymerized photosensitive composition further comprises a chemical compound including two or more of (meth)acryloyl groups.

8. The polymerized photosensitive composition according to claim 1 , wherein the (meth)acrylic polymer comprises a (meth)acrylic unit including an acid group.

9. The polymerized photosensitive composition according to claim 1 , wherein the (meth)acrylic polymer further comprises a silane modified (meth)acrylic unit.

10. The polymerized photosensitive composition according to claim 1 , wherein the polymerized photosensitive composition further comprises additives selected from the group consisting of scattering particles, reflective index adjusting material and a combination of any of these.

11. The polymerized photosensitive composition according to claim 1 , where in the polymerized photosensitive composition further comprises coloring agent selected from the group consisting of a dye, pigment and a combination of any of these.

12. A color conversion film comprising a plurality of nanosized fluorescent material, a wetting and dispersing agent, and a polymer matrix,
wherein the nanosized fluorescent material is selected from the group consisting of nanosized inorganic phosphor materials, quantum sized materials and a combination thereof, and
wherein the wetting and dispersing agent is a copolymer selected from the group consisting of graft copolymers, block copolymers, alternating copolymers, and random copolymers and comprises an anchoring group selected from the group consisting of phosphine groups, phosphine oxide groups, phosphate groups, phosphonate groups, thiol groups, tertiary amine, carboxyl groups, hetero cyclic groups, silane groups, sulfonic acids, hydroxyl groups, and phosphonic acids.

13. The color conversion film according to claim 12 , wherein the color conversion film further comprises an additive selected from the group consisting of scattering particles, reflective index adjusting material and a combination of any of these.

14. The color conversion film according to claim 12 , wherein the color conversion film further comprises a coloring agent selected from the group consisting of a dye, pigment and a combination of any of these.

15. A color conversion film fabrication process which comprises preparing the polymerized photosensitive composition according to claim 1 in said color conversion film fabrication process.

16. An optical device comprising the color conversion film according to claim 12 .

17. The optical device according to claim 16 , wherein the optical device further comprises a film having nano-meter scale structures and the film is attached onto the outmost surface of the color conversion film.

18. A method for preparing the optical device, wherein the method comprises following step (A);
(A) providing the color conversion film according to claim 12 , in an optical device.

Assignees

• Merck Patent Gmbh
• Az Electronic Mat Luxembourg Sarl

Inventors

• Hirayama Yuki
• Kishimoto Tadashi
• Suzuki Masayoshi
• Yokoyama Daishi
• Taniguchi Katsuto
• Nonaka Toshiaki

Classifications

• G03F7/033

  the binders being polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds, e.g. vinyl polymers · CPC title

• G03F7/0007

  Filters, e.g. additive colour filters; Components for display devices · CPC title

• G03F7/16

  Coating processes; Apparatus therefor (applying coatings to base materials in general B05; applying photosensitive compositions to base for photographic purposes G03C1/74) · CPC title

• G03F7/105 Primary

  having substances, e.g. indicators, for forming visible images · CPC title

• B82Y20/00

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