Hybrid light redirecting and light diffusing constructions

• US 9,945,525 B2
• Filed: 01/09/2017
• Issued: 04/17/2018
• Est. Priority Date: 03/30/2011
• Status: Active Grant

• Current Assignee: 3M Innovative Properties Company (3M Company)
• Original Assignee: 3M Innovative Properties Company (3M Company)
• Inventors: Padiyath, Raghunath, Hao, Bing, Marttila, Charles A.
• Primary Examiner(s): MAHONEY, CHRISTOPHER E
• Application Number:
  US15/401,657
• Publication Number:
  US 20170114972A1
• Time in Patent Office: 463 Days
• Field of Search: 359592-594, 359597
• CPC Class Codes: B32B 17/10 of synthetic resin
• CPC Class Codes: B32B 17/10036 comprising two outer glass sheets
• CPC Class Codes: B32B 17/10174 Coatings of a metallic or dielectric material on a constituent layer of glass or polymer
• CPC Class Codes: B32B 17/1044 Invariable transmission
• CPC Class Codes: B32B 17/10761 containing vinyl acetal
• CPC Class Codes: F21S 11/002 characterised by the means for collecting or concentrating the sunlight, e.g. parabolic reflectors or Fresnel lenses
• CPC Class Codes: F21S 11/007 characterised by the means for transmitting light into the interior of a building
• CPC Class Codes: G02B 19/0009 having refractive surfaces only
• CPC Class Codes: G02B 19/0042 for use with direct solar radiation
• CPC Class Codes: G02B 5/0242 by means of dispersed particles
• CPC Class Codes: G02B 5/0273 characterized by the use
• CPC Class Codes: G02B 5/0278 used in transmission
• 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

Abstract

Solar light redirecting glazing units include light redirecting and light diffusing constructions. The solar light redirecting glazing units may include a glazing substrate, a visible light diffusing layer, and a light redirecting layer oriented such that incoming solar light contacts the visible light diffusing layer before contacting the light redirecting layer. The solar light redirecting glazing units may include a glazing substrate, a patterned visible light diffusing layer, and a light redirecting layer. The solar light redirecting glazing units may include two glazing substrates separated by an intervening space with a solar light redirecting layer disposed on one glazing substrate, and a visible light diffusing layer disposed on the other glazing substrate.

Claims

1. A composite multilayer construction comprising:

a window on the exterior surface of a building and adjacent to a room or a corridor, comprising;

a first glazing substrate; and

a solar light redirecting construction disposed on the first glazing substrate, wherein the solar light redirecting construction comprises;

a visible light diffusing layer; and

a light redirecting layer, wherein the layers are laminated together, and wherein the light redirecting layer comprises a major surface with a microstructured surface, the microstructured surface comprising forming a plurality of prism structures wherein the plurality of prism structures comprises a plurality of asymmetric prisms.

2. The composite multilayer construction of claim 1, wherein the visible light diffusing layer and the light redirecting layer comprise polymeric films.

3. The composite multilayer construction of claim 1, wherein the visible light diffusing layer comprises a patterned visible light diffusing layer.

4. The composite multilayer construction of claim 3, wherein the patterned visible light diffusing film comprises a film with diffusive stripes, regular geometric shapes, or irregular geometric shapes.

5. The composite multilayer construction of claim 1, further comprising at least one additional layer.

6. The composite multilayer construction of claim 5, wherein the at least one additional layer comprises a low E layer, an infrared light rejecting layer, a color or tinting layer, an adhesive layer, or combination thereof.

7. The composite multilayer construction of claim 6, wherein the at least one additional layer comprises an infrared rejecting layer comprising an infrared light rejecting multi-layer film, an infrared light rejecting coating, or combination thereof.

8. The composite multilayer construction of claim 7, wherein the infrared light rejecting layer reflects infrared light, absorbs infrared light, or combination thereof.

9. The composite multilayer construction of claim 1, wherein the light redirecting layer comprises a patterned light redirecting layer.