Daylight redirecting glazing laminates
Assignee3M Innovative Properties Company
InventorsRAGHUNATH PADIYATH, JONATHAN F. MANSHEIM, STEPHEN J. KUNCIO
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Abstract
The present disclosure is directed on some embodiments to light redirecting constructions comprising a first glazing substrate, a light redirecting film comprising at least one microstructure surface, a second glazing substrate, and a first interlayer bonding the first glazing substrate to both the light redirecting film and the second glazing substrate; wherein the light redirecting film has an area smaller than the area of the first interlayer.
Claims27
A light redirecting construction comprising:
- a first glazing substrate;
- a light redirecting film comprising at least one microstructure surface;
- a second glazing substrate, and
- a first interlayer adjacent the first glazing substrate to both the light redirecting film and the second glazing substrate;
- wherein the light redirecting film has an area smaller than the area of the first interlayer.
The light redirecting construction according to claim 0, wherein the light redirecting construction is a laminate.
The light redirecting construction according to any of the preceding claims, wherein the light redirecting film is positioned in the light redirecting construction so that the side of the light redirecting film having the at least one microstructure surface is facing the second glazing substrate.
The light redirecting construction according to any of the preceding claims, wherein the light redirecting film is positioned in the light redirecting construction so that the side of the light redirecting film having the at least one microstructure surface is facing the second glazing substrate;
- and
- wherein the light redirecting construction further comprises an optical film located between the light redirecting film and the second glazing substrate.
The light redirecting construction according to any of the preceding claims, wherein the light redirecting film is positioned in the light redirecting construction so that the side of the light redirecting film having the at least one microstructure surface is facing the second glazing substrate and further comprises aerogel in the volume defined by the at least one microstructure surface and the second glazing substrate.
The light redirecting construction according to any of the preceding claims, further comprising a diffusing film.
The light redirecting construction according to any of the preceding claims, further comprising a third glazing substrate bonded to the second glazing substrate by a second interlayer.
The light redirecting construction according to any of the preceding claims, further comprising a third glazing substrate, wherein the third glazing substrate is not bonded to the second glazing substrate, and is located a distance L1 from the second glazing substrate.
The light redirecting construction according to any of the preceding claims further comprising a safety film.
The light redirecting construction according to any of the preceding claims further comprising a safety film and wherein the safety film is adjacent the second glazing substrate or, if present, adjacent the third glazing substrate.
The light redirecting construction according to any of the preceding claims, wherein at least one of the first interlayer or the second interlayer if present, comprises at least one component chosen from polyvinyl butyrate (PVB), ethylene vinyl acetate (EVA), and SentryGlas®Plus (SGP).
The light redirecting construction according to any of the preceding claims, wherein at least one of the first interlayer or the second interlayer if present, comprises an UV blocking agent.
The light redirecting construction according to any of the preceding claims, wherein at least one of the first interlayer or the second interlayer if present, is chosen from a clear interlayer and a diffusing interlayer.
The light redirecting construction according to any of the preceding claims, wherein at least one of the first interlayer or the second interlayer if present, has a visible light transmission of less than 90%.
The light redirecting construction according to any of the preceding claims, wherein the area of the light redirecting film is 98% of the area covered by the first interlayer in the final laminated light redirecting construction.
The light redirecting construction according to any of the preceding claims, wherein the area of the light redirecting film is 95% of the area covered by the first interlayer in the final laminated light redirecting construction.
The light redirecting construction according to any of the preceding claims, wherein the area of the light redirecting film is 90% of the area covered by the first interlayer in the final laminated light redirecting construction.
The light redirecting construction according to any of the preceding claims, wherein the area of the light redirecting film is 80% of the area covered by the first interlayer in the final laminated light redirecting construction.
The light redirecting construction according to any of the preceding claims, wherein the interlayer is in contact with 10% of less than the area of the light redirecting film.
The light redirecting construction according to any of the preceding claims, wherein the interlayer contacts a given percentage of the area of the light redirecting film, and wherein that percentage is chosen from 20% or less, 30% or less, 40% or less, 50% or less, 60% or less, 70% or less, 80% or less, 90% or less, and 95% or less.
The light redirecting construction according to any of the preceding claims, wherein the light redirecting film comprises:
- a first optical film having a first major surface and a second major surface opposite the first major surface wherein the first major surface comprises a microstructured surface comprising asymmetrical structures;
- and
- a second optical film having a first major surface and a second major surface opposite the first major surface, the second major surface disposed adjacent to and making contact with and bonded to substantially all of the structures of the first major structured surface of the first optical film, and wherein the first major surface of the first optical film and second major surface of the second optical film defines an enclosed volume partially occupied by the structures on the first major surface such that the structures occupy 20-80% of the total volume defined.
The light redirecting construction according to any of the preceding claims, wherein the first glazing substrate has a first major surface and a second major surface;
- and wherein the light redirecting film comprises:
- a first solar light redirecting layer disposed on the first major surface of the first glazing substrate, the first solar light redirecting layer comprising a microstructured surface forming a plurality of prism structures;
- and
- a second solar light redirecting layer disposed on the second major surface of the first glazing substrate, the second solar light redirecting layer comprising a microstructured surface forming a plurality of prism structures, wherein at least one of the first or the second microstructured surface comprises an ordered arrangement of a plurality of asymmetric refractive prisms, such that the first solar light redirecting layer and the second solar light redirecting layer are not identical or mirror images.
The light redirecting construction according to any of the preceding claims, wherein the first glazing substrate has a first major surface and a second major surface;
- and wherein the light redirecting film comprises:
- a first solar light redirecting layer disposed on either the first major surface or the second major surface of the first glazing substrate, the first solar light redirecting layer comprising a major surface forming a plurality of prism structures;
- a fourth glazing substrate having a first major surface and a second major surface;
- and
- a second solar light redirecting layer disposed on the first major surface or the second major surface of the second glazing substrate, the second solar light redirecting layer comprising a major surface forming a plurality of prism structures,
- wherein at least one of the first or the second microstructured surfaces comprises an ordered arrangement of a plurality of asymmetric refractive prisms, such that the first solar light redirecting layer and the second solar light redirecting layer are not identical or mirror images.
The light redirecting construction according to any of the preceding claims, wherein the light redirecting film comprises:
- an optical substrate having a first major surface and a second major surface opposite the first major surface;
- a first solar light redirecting layer disposed on the first major surface of the optical substrate, wherein the first solar light redirecting layer comprises a first microstructured surface comprising a plurality of multi-sided refractive prisms;
- and
- a second solar light redirecting layer disposed on the second major surface of the optical substrate, wherein the second solar light redirecting layer comprises a second microstructured surface comprising a plurality of multi-sided refractive prisms,
- wherein at least one of the first or the second microstructured surface comprises an ordered arrangement of a plurality of asymmetric refractive prisms, such that the first solar light redirecting layer and the second solar light redirecting layer are not identical or mirror images.
The light redirecting construction according to any of the preceding claims, wherein the light redirecting film comprises:
- a visible light diffusing layer disposed on the first glazing substrate;
- and
- a light redirecting layer adjacent to the visible light diffusing layer, the light redirecting layer comprising a major surface forming a plurality of prism structures, and wherein the visible light diffusing layer and light redirecting layer are oriented such that incoming solar light contacts the visible light diffusing layer before contacting the light redirecting layer.
The light redirecting construction according to any of the preceding claims, wherein the light redirecting film comprises:
- a patterned visible light diffusing layer;
- and
- a light redirecting layer adjacent to the visible light diffusing layer wherein the light redirecting layer comprises a major surface forming a plurality of prism structures.
The light redirecting construction according to any of the preceding claims, wherein the light redirecting film is chosen from a light redirecting film disclosed in PCT publications Nos. WO 2011/084391, WO 2012/134787, WO 2013/012865 and WO 2013/012858.
Dependencies are inferred from the claim text.