Optical constructions

Patent metadata

Field	Value
Publication number	US-12099223-B2
Application number	US-201916419339-A
Country	US
Kind code	B2
Filing date	May 22, 2019
Priority date	May 29, 2015
Publication date	Sep 24, 2024
Grant date	Sep 24, 2024

Abstract

An optical construction includes a reflective polarizer layer having a first pass axis and an absorptive polarizer layer having a second pass axis that is substantially aligned with the first pass axis. At least one electrically conductive light scattering layer is arranged between the reflective polarizer layer and the absorptive polarizer layer.

First claim

The invention claimed is:

1. An optical construction comprising:
a partial reflector having visible light reflectance between about 25% to about 75%;
an absorptive polarizer disposed on the partial reflector; and
a metal mesh disposed between the partial reflector and the absorptive polarizer, wherein the metal mesh is configured to operate as a touch sensor.

2. The optical construction of claim 1 , wherein the partial reflector comprises a reflective polarizer, wherein pass axes of the absorptive polarizer and the reflective polarizer are within about 15 degrees of each other.

3. The optical construction of claim 2 , wherein the reflective polarizer comprises a multilayer optical film.

4. The optical construction of claim 1 , wherein the metal mesh comprises a square mesh.

5. The optical construction of claim 1 , wherein the metal mesh comprises a hexagonal mesh.

6. The optical construction of claim 1 , wherein the metal mesh comprises a random mesh.

7. The optical construction of claim 1 , wherein the metal mesh comprises metal traces having a width between about 0.05 microns to about 10 microns.

8. The optical construction of claim 1 , wherein the metal mesh comprises metal traces having a thickness between about 0.05 microns to about 10 microns.

9. The optical construction of claim 1 , wherein the metal mesh comprises one or more of silver, aluminum, gold and palladium.

10. The optical construction of claim 1 further comprising one or more electrical connections to the metal mesh.

11. The optical construction of claim 1 , wherein the metal mesh has a sheet resistance between about 0.01 and 10 9 ohms per square.

12. The optical construction of claim 1 , wherein the metal mesh has a transmitted haze between about 0.2 and 5 percent.

13. A display system comprising a display disposed on the optical construction of claim 1 .

14. The display system of claim 13 , wherein the display comprises a liquid crystal display.

15. An optical construction comprising:
a partial reflector having visible light reflectance between about 25% to about 75%;
an absorptive polarizer disposed on the partial reflector; and
a metal mesh disposed between the partial reflector and the absorptive polarizer and having a transmitted haze between about 0.1 and 10 percent.

16. A display system comprising a display disposed on the optical construction of claim 15 .

17. The display system of claim 16 , wherein the display comprises a liquid crystal display.

18. The optical construction of claim 15 , wherein the transmitted haze is between about 0.2 and 5 percent.

19. The optical construction of claim 15 , wherein the transmitted haze is between about 0.3 and 3 percent.

Assignees

• 3M Innovative Properties Company

Inventors

• Frey Matthew H
• Schardt Craig R
• Boyd Gary T
• Borchers Eric J
• Petkovich Nicole D

Classifications

• G02F2203/02

  reflective · CPC title

• G02F1/13362

  providing polarized light, e.g. by converting a polarisation component into another one · CPC title

• G02F1/133536

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

• G02B2207/107

  Porous materials, e.g. for reducing the refractive index · CPC title

• G02B5/124

  plural reflecting elements forming part of a unitary plate or sheet · CPC title