LIGHT REDIRECTING SOLAR CONTROL FILM

• US 20080291541A1
• Filed: 05/23/2007
• Published: 11/27/2008
• Est. Priority Date: 05/23/2007
• Status: Abandoned Application

• Current Assignee: 3M Innovative Properties Company (3M Company)
• Original Assignee: 3M Innovative Properties Company (3M Company)
• Inventors: Padiyath, Raghunath, Huntley, Douglas A., Benson, Olester JR.
• Application Number:
  US11/752,350
• Publication Number:
  US 20080291541A1
• Time in Patent Office: Days
• US Class Current: 359/569
• CPC Class Codes: E06B 2009/2417 Light path control; means to control reflection
• CPC Class Codes: E06B 3/6715 specially adapted for increased thermal insulation or for controlled passage of light E06B3/66323 takes precedence; coating of glass pains C03C17/00; devices or arrangements for controlling the intensity, colour, phase, polarisation or direction of light G02F1/00
• CPC Class Codes: E06B 9/24 Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; Slat blindsoperating, guiding or securing devices or arrangements for roll-type closures E06B9/56; free-hanging flexible screens A47H23/00
• CPC Class Codes: F21S 11/007 characterised by the means for transmitting light into the interior of a building
• CPC Class Codes: G02B 5/0205 characterised by the diffusing properties
• CPC Class Codes: G02B 5/0215 the surface having a regular structure
• CPC Class Codes: G02B 5/0231 the surface having microprismatic or micropyramidal shape macroscopic prism arrays G02B5/045
• CPC Class Codes: G02B 5/0284 used in reflection
• CPC Class Codes: G02B 5/045 Prism arrays
• CPC Class Codes: G02B 5/208 for use with infrared or ultraviolet radiation, e.g. for separating visible light from infrared and/or ultraviolet radiation
• CPC Class Codes: G02B 5/282 reflecting for infrared and transparent for visible light, e.g. heat reflectors, laser protection
• CPC Class Codes: G02B 5/287 comprising at least one layer of organic material

Abstract

A light redirecting solar control film includes a multilayer film that transmits visible light and reflects infrared light, and a light redirecting layer adjacent to the multilayer film forming a light redirecting solar control film. The light redirecting layer includes a major surface forming a plurality of prism structures.

Claims

1. A light redirecting solar control film comprising:

a multilayer film that transmits visible light and reflects infrared light; and

a light redirecting layer adjacent to the multilayer film forming a light redirecting solar control film, the light redirecting layer comprising a major surface forming a plurality of prism structures.

2. A light redirecting solar control film according to claim 1, wherein the multilayer film is a multilayer polymeric film.

3. A light redirecting solar control film according to claim 1, wherein the multilayer film comprises a plurality of metal layers.

4. A light redirecting solar control film according to claim 1, wherein the light redirecting layer comprising a major surface forming a plurality of linear prism structures.

5. A light redirecting solar control film according to claim 1, wherein the light redirecting layer comprising a major surface forming a plurality of pyramidal prism structures.

6. A light redirecting solar control film according to claim 1, further comprising a filling layer disposed on the prism structures filling at least a portion of cavities formed between adjacent prism structures, wherein the filling layer has a refractive index value that is different than a refractive index value of the prism structures.

7. A light redirecting solar control film according to claim 1, wherein the light redirecting layer comprising a major surface forming a plurality of truncated prism structures.

8. A light redirecting solar control film according to claim 2, wherein the multilayer polymeric infrared light reflecting film comprises a plurality of alternating polymeric layers of a first polymer material and a second polymer material and at least one of the alternating layers is birefringent and orientated and the alternating polymeric layers cooperate to reflect infrared light and visible light is transmitted through the multilayer polymeric infrared light reflecting film.

9. A light redirecting solar control film according to claim 1, further comprising an infrared light absorbing nanoparticle layer disposed adjacent to the multilayer polymeric film.

10. A light redirecting solar control film according to claim 9, wherein the infrared absorbing nanoparticle layer comprises lanthanum hexaboride, antimony tin oxide, or indium tin oxide.

11. A light redirecting solar control film according to claim 1, further comprising an adhesive layer disposed between the multilayer film and the light redirecting layer and the adhesive layer comprising an ultraviolet light absorbing material.

12. A light redirecting solar control film according to claim 1, further comprising a glazing substrate disposed between the multilayer film and the light redirecting layer.

13. A light redirecting solar control glazing unit, comprising:

a first glazing substrate; and

a light redirecting solar control film disposed on the first glazing substrate, the light redirecting solar control film comprising;

a multilayer film that transmits visible light and reflects infrared light; and

a light redirecting layer adjacent to the multilayer film forming a light redirecting solar control film, the light redirecting layer comprising a major surface forming a plurality of prism structures.

14. A light redirecting solar control glazing unit according to claim 13, wherein the multilayer film is a multilayer polymeric film.

15. A light redirecting solar control glazing unit according to claim 13, further comprising an adhesive layer disposed between the multilayer film and the first glazing substrate and the adhesive layer comprising an ultraviolet light absorbing material.

16. A light redirecting solar control glazing unit according to claim 13, wherein the first glazing substrate has a surface area value and the diffusing solar control film is disposed on only a portion of the surface area value.

17. A light redirecting solar control glazing unit according to claim 13, further comprising a second glazing substrate and the light redirecting solar control film is disposed between the first glazing substrate and the second glazing substrate.

18. A light redirecting solar control glazing unit according to claim 17, wherein the light redirecting solar control glazing unit is an insulated glazing unit comprising a sealed volume of gas between the first glazing substrate and the second glazing substrate.

19. A light redirecting solar control glazing unit according to claim 14, wherein the multilayer polymeric infrared light reflecting film comprises a plurality of alternating polymeric layers of a first polymer material and a second polymer material and at least one of the alternating layers is birefringent and orientated and the alternating polymeric layers cooperate to reflect infrared light and visible light is transmitted through the multilayer polymeric infrared light reflecting film.

20. A light redirecting solar control glazing unit according to claim 13, wherein the light redirecting layer comprising a major surface forming a plurality of linear prism structures.

21. A light redirecting solar control glazing unit according to claim 13, wherein the light redirecting layer comprises a major surface forming a plurality of pyramidal prism structures.

22. A light redirecting solar control glazing unit according to claim 13, further comprising a filling layer disposed on the prism structures filling at least a portion of cavities formed between adjacent prism structures, wherein the filling layer has a refractive index value that is different than a refractive index value of the prism structures.

23. A light redirecting solar control glazing unit according to claim 22, wherein the filling layer is capable of being cleanly removed from the prism structures.

24. A light redirecting solar control system, comprising;

a glazing substrate;

a light redirecting solar control film disposed on the glazing substrate, the light redirecting solar control film comprising;

a multilayer film that transmits visible light and reflects infrared light; and

a light redirecting layer adjacent to the multilayer film forming a light redirecting solar control film, the light redirecting layer comprising a major surface forming a plurality of prism structures; and

a diffuser positioned to receive light transmitted by the light redirecting solar control film.

25. A light redirecting solar control system according to claim 24, wherein the glazing substrate is positioned orthogonally to the diffuser.