Optical construction and display system incorporating same

Patent metadata

Field	Value
Publication number	US-11435616-B2
Application number	US-202016840694-A
Country	US
Kind code	B2
Filing date	Apr 6, 2020
Priority date	Apr 15, 2009
Publication date	Sep 6, 2022
Grant date	Sep 6, 2022

Abstract

Optical constructions are disclosed. A disclosed optical construction includes a reflective polarizer layer, and an optical film that is disposed on the reflective polarizer layer. The optical film has an optical haze that is not less than about 50%. Substantial portions of each two neighboring major surfaces in the optical construction are in physical contact with each other. The optical construction has an axial luminance gain that is not less than about 1.2.

First claim

What is claimed is:

1. An optical construction comprising:
a reflective polarizer layer; and
an optical film comprising a plurality of interconnected voids comprising surface voids and interior voids, the optical film disposed on the reflective polarizer layer and having an optical haze that is not less than about 40%, and an optical clarity that is not less than about 80%, wherein substantial portions of each two neighboring major surfaces in the optical construction are in physical contact with each other.

2. The optical construction of claim 1 , wherein the optical film has an effective index of refraction that is less than about 1.4.

3. The optical construction of claim 1 , wherein the optical film has an optical clarity that is not less than about 90%.

4. The optical construction of claim 1 , wherein the optical film has a thickness that is not less than about 500 nm.

5. The optical film of claim 4 , wherein the optical film has a thickness that is not less than about 700 nm.

6. The optical film of claim 5 , wherein the optical film has a thickness that is not less than about 1 micron.

7. The optical construction of claim 1 , wherein the optical film comprises:
a binder;
a plurality of interconnected voids comprising surface voids and interior voids; and
a plurality of particles.

8. The optical construction of claim 1 , wherein at least 90% of each two neighboring major surfaces of the optical construction are in physical contact with each other.

9. The optical construction of claim 1 , wherein the optical film is coated on the reflective polarizer layer.

10. The optical construction of claim 1 , wherein the reflective polarizer layer comprises a multilayer optical film comprising alternating layers, wherein at least one of the alternating layers comprises a birefringent material.

11. An optical construction comprising:
a substrate layer; and
an optical film comprising a plurality of interconnected voids comprising surface voids and interior voids, the optical film disposed on the substrate layer and having an optical haze that is not less than about 70%, an optical clarity that is not less than about 90%, and an effective index of refraction that is not greater than about 1.4, wherein substantial portions of each two neighboring major surfaces in the optical construction are in physical contact with each other.

12. The optical construction of claim 11 , wherein the substrate layer is polyethylene terephthalate.

13. The optical construction of claim 11 , wherein the optical film has an optical haze that is not less than about 80%.

14. The optical construction of claim 11 , wherein the optical film has an optical clarity that is not less than about 95%.

15. The optical film of claim 11 , wherein the optical film has a thickness that is not less than about 1 micron.

16. The optical film of claim 15 , wherein the optical film has a thickness that is not less than about 2 micron.

17. The optical construction of claim 11 , wherein the optical film comprises:
a binder;
a plurality of interconnected voids comprising surface voids and interior voids; and
a plurality of particles.

18. The optical construction of claim 11 , wherein the optical film is coated on the substrate.

Assignees

• 3M Innovative Properties Co

Inventors

• Hao Encai
• Lu Fei
• Kolb William Blake
• Ostlie Brian W
• Haag Adam D
• Free Michael Benton
• Coggio William D
• Steiner Michael L
• Widagdo Soemantri
• Chen-Ho Kui
• Liu Lan H
• Kamrath Robert F
• Tapio Scott M
• Wheatley John A
• Hoyle Charles D
• Weber Michael F

Classifications

• G02F1/133536

  Reflective polarizers (G02F1/13362 takes precedence) · CPC title

• G02B6/0056

  for producing polarisation effects, e.g. by a surface with polarizing properties or by an additional polarizing elements · CPC title

• G02B5/3041 Primary

  comprising multiple thin layers, e.g. multilayer stacks · CPC title

• G02B5/3066

  involving the reflection of light at a particular angle of incidence, e.g. Brewster's angle · CPC title

• G02B5/3083

  Birefringent or phase retarding elements (G02B5/3008, G02B5/3016 take precedence; systems for polarisation control G02B27/286; manufacturing phase modulating patterns by lithographic processes G03F7/001) · CPC title