Electro-optical light control element with medium with optically isotropic phase and thus equipped electro-optical displays

摘要

Electro-optical light control element comprising - a substrate or a plurality of substrates, - an electrode assembly, - at least one element or elements for polarizing the light and - a control layer of a mesogenic control medium, characterized in that - the light control element is operated at a temperature at which the mesogenic control medium in the non-driven state is in an optically isotropic phase and that - the electrode arrangement can generate an electric field with a significant component parallel to the surface of the mesogenic control medium and that - the electrode arrangement is designed so that at least one of the four following conditions is met The electrically conductive layers adjacent to one another in the plane of the control layer have a spacing of 20 μm or less from one another, the conductive layer or, if there are more of the electrically conductive layers, one or more The electrode structure comprises in each case two or more layers which overlap each other, are electrically conductively connected to one another or to a control electronics and at the same time are separated from one another by a dielectric layer over substantial parts of their surface conductive layer, or when more of the electrically conductive layers are present, one or more of the conductive layers of the electrode structure is / are separated from the respective underlying substrate by a solid dielectric layer.