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US 11,952,528 B2Granted
Switching layers for use in a switching element
AssigneeMerck Patent GmbH
InventorsHenriette Bakker, Ties De Jong, Michael Junge, Andreas Beyer, Jasper Van Den Muijsenberg
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Abstract
The present invention relates to an assembly of switching layers for dimming and scattering of light and to window elements comprising the arrangement of switching layers.
Claims20
A multilayer arrangement for regulating the passage of light, which comprises
- a first switching layer which is switchable between an optically clear state and a light scattering state and which contains a material which comprises a liquid-crystalline medium comprising one or more mesogenic compounds, one or more chiral compounds, and a polymeric component, wherein the polymeric component is contained in the material in an amount, based on the overall contents of the material, of 5% by weight or less, and wherein the liquid-crystalline medium of the first switching layer has a clearing point of 80° C. or more, and
- a switching element comprising a second switching layer, wherein the switching element is switchable between a bright state and a dark state and wherein the second switching layer is a liquid-crystalline layer which comprises one or more dichroic dyes and optionally one or more chiral compounds,
- wherein, relative to an outer face which is facing a light source, the first switching layer is placed in front of the switching element.
Dependencies are inferred from the claim text.