Light management films and articles thereof

• US 20040043234A1
• Filed: 05/09/2003
• Published: 03/04/2004
• Est. Priority Date: 05/10/2002
• Status: Abandoned Application

• Current Assignee: Sabic Innovative Plastics IP BV (Government of Saudi Arabia)
• Original Assignee: Sabic Innovative Plastics IP BV (Government of Saudi Arabia)
• Inventors: Hay, Grant, Yeung, Chung-hei
• Application Number:
  US10/435,233
• Publication Number:
  US 20040043234A1
• Time in Patent Office: Days
• US Class Current: 428/496
• CPC Class Codes: B32B 27/36 comprising polyesters
• CPC Class Codes: C08G 63/19 Hydroxy compounds containing aromatic rings
• CPC Class Codes: C08G 63/64 Polyesters containing both carboxylic ester groups and carbonate groups
• CPC Class Codes: G02B 5/124 plural reflecting elements forming part of a unitary plate or sheet
• CPC Class Codes: Y10T 428/31841 Next to cellulosic

Abstract

A light management film having internal refraction or reflection properties comprising an arylate polyester polymer having reheological properties suitable for micro replications of surface structures during the application of heat and pressure, and a suitable refractive index of from about 1.4 to about 2.0.

Claims

1. A light management display film having internal refraction properties comprising an arylate polyester polymer having suitable Theological properties and a refractive index from about 1.4 to about 2.0.

2. A light management film according to claim 1 wherein the arylate polyester polymer comprises resorcinol arylate polyester chain members.

3. A light management film according to claim 2 wherein the chain members comprise at least one diphenol residue in combination with at least one dicarboxylic acid residue.

4. A light management film according to claim 1 wherein the polyester comprises a resorcinol arylate-containing block copolyester-carbonate.

5. A light management film according to claim 1 wherein said film has a structure comprising right angle prisms.

6. A light management film according to claim 1 for displays selected from the group consisting of privacy films, brightness enhancement films, polarization recycling films, and the like.

7. A light management film according to claim 1 having a refractive index from about 1.5 to about 1.7.

8. A light management film according to claim 1 having a refractive index from about 1.60 to about 1.63.

9. A light management film according to claim 1 having an optically transparent adjacent layer.

10. A light management film according to claim 12 wherein the optically transparent adjacent layer comprises a polycarbonate.

12. A light management film according to claim 1 suitable for applications selected from the group consisting of cover display, LCD, forward and backlit, forward and back projection display, OLED, vending machine front panel, outdoor/indoor lighting and visual effect outdoor/cladding/OVAD.

13. A method of making a light management display film comprising shaping a shaping film comprising a resorcinol arylate polyester chain members into a three-dimensional shape having light management properties.

11. A light management film according to claim 13 wherein the optically transparent, polycarbonate adjacent layer the light management film have refractive indexes from about 1.5 to about 1.7.

14. A light management film having two layers including an outer layer comprising a polyarylate co-polymer or polyestercarbonate having a refractive index from about 1.6 to about 1.7, and having plastic or glass beads or microstructures on an outward-facing facet suitable for creating substantial retroreflection or total internal reflection for incoming light rays, and an inner layer comprising a thermoplastic compound.

16. A light management film comprising an outer layer with refractive index from about 1.0 to about 1.5;

a middle layer comprising polyarylate co-polymer or polyestercarbonate having a refractive index from about 1.6 to about 1.7, having plastic or glass beads or microstructures on the outward-facing facet suitable for retroreflection or total internal reflection; and

an inner layer comprising a thermoplastic compound.

17. The film of claim 22 having microstructures comprising one or more microprisms, encapsulated lens, corner cubes, discretely random structures, or continuously random structures.

15. The film of claim 17 comprising microstructures of one or more microprisms, encapsulated lens, corner cubes, discretely random structures, or continuously random structures.

18. A multi-layer light management film comprising a layer with a refractive index from about 1.0 to about 1.5;

a second layer comprising a polyarylate co-polymer or polyestercarbonate having a refractive index from about 1.6 to about 1.7, having plastic or glass beads or microstructures on the outward-facing facet suitable for retroreflection or total internal reflection; and

a third layer comprising a thermoplastic compound.

19. The film of claim 27 comprising microstructures of one or more microprisms, encapsulated lens, corner cubes, discretely random structures, or continuously random structures.