Merck Patent Gmbh

Paul Verbunt

Ties De Jong

Michael Junge

Mila Fischer

Roel Van Raak

A method for preparing a switching element which is operable in and electrically switchable between an optically clear state and a scattering state, wherein one or more polymerisable mesogenic compounds provided in a layer containing a liquid-crystalline medium which comprises one or more mesogenic compounds, one or more chiral compounds and the one or more polymerisable mesogenic compounds are subjected to polymerisation in the presence of a direct current (DC) electric field in the layer. Also, a switching element obtained or respectively obtainable by carrying out the method and to the use of the switching element in a window.

Method for preparing a liquid crystal-based switching element

Liquid-crystalline media containing one or more mesogenic compounds, one or more chiral compounds, and one or more polymerizable mesogenic compounds, wherein the media exhibit a pitch of 0.55 &#x3bc;m or more and a clearing point of 80&#xb0; C. or more and wherein the one or more polymerizable mesogenic compounds are contained in an amount, based on the overall contents of the media, of 5% by weight or less, are suitable as modulation materials. Such modulation materials can be used in switching layers and window elements.

Liquid-crystalline medium for use in a switching element

A method for electrically driving a switchable optical element is provided wherein the state of a liquid-crystalline medium is controlled by an applied electric field. The provided method comprises at least one of

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Paul Verbunt