Layer arrangement for the regulation of light transmission

Patent metadata

Field	Value
Publication number	US-10139658-B2
Application number	US-201214237649-A
Country	US
Kind code	B2
Filing date	Jul 13, 2012
Priority date	Aug 8, 2011
Publication date	Nov 27, 2018
Grant date	Nov 27, 2018

Abstract

A layer arrangement (1) which changes the transmission of incident light depending on its temperature, where the layer arrangement (1) has a first polarization layer (5a), a switching layer (2) which influences the polarization properties of light depending on the temperature, and a second polarization layer (5b), whereby both the first polarization layer (5a) and the second polarization layer (5b) are arranged to affect polarization both in the VIS region and in the NIR region.

First claim

The invention claimed is:

1. Layer arrangement ( 1 ) which changes the transmission of incident light depending on its temperature, where the layer arrangement ( 1 ) has a first polarization layer ( 5 a ), a switching layer ( 2 ) which influences the polarization properties of light depending on the temperature, and a second polarization layer ( 5 b ),
wherein both the first polarization layer ( 5 a ) and the second polarization layer ( 5 b ) are arranged to affect polarization both in the VIS region and in the NIR region,
wherein the first polarization layer ( 5 a ) comprises a VIS region affecting polarization layer ( 3 a ) and a NIR region affecting polarization layer ( 4 a ),
wherein the second polarization layer ( 5 b ) combines VIS region polarizing properties and NIR region polarizing properties in one polarizing layer which comprises a dichroic dye dispersed in a material providing orientation ( 8 ),
wherein the switching layer ( 2 ) is arranged to switch between a transparent state in a first temperature range and a dark state in a second temperature range, and
wherein, in the dark state, the switching layer is in an isotropic state and, in the transparent state, the switching layer is a twisted nematic liquid crystalline layer.

2. Layer arrangement according to claim 1 , wherein the first polarization layer ( 5 a ) and/or the second polarization layer ( 5 b ) comprise an additional VIS region affecting polarization layer ( 9 a , 9 b ).

3. Layer arrangement according to claim 1 , wherein the layer arrangement is applied to a glass pane ( 6 ).

4. A method for the regulation of the transmission of light and heat from the outside into an interior space, which comprises providing a layer arrangement according to claim 1 between the outside and the interior space.

Assignees

• Junge Michael
• Beyer Andreas
• Merck Patent Gmbh

Inventors

• Junge Michael
• Beyer Andreas

Classifications

• E06B2009/2417

  Light path control; means to control reflection · CPC title

• G02F2203/11

  involving infrared radiation · CPC title

• G02B5/208

  for use with infrared or ultraviolet radiation, e.g. for separating visible light from infrared and/or ultraviolet radiation · CPC title

• E06B9/24 Primary

  Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; {Slat blinds}(operating, guiding or securing devices or arrangements for roll-type closures E06B9/56; free-hanging flexible screens A47H23/00) · CPC title

• G02F1/133528

  Polarisers · CPC title