Liquid crystalline medium and liquid crystal display
AssigneeMerck Patent GmbH
InventorDoina Ionescu
Life of this patent
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Abstract
The instant invention relates to liquid crystal displays of the flexoelectric type operating in the uniformly lying helix mode and in particular to the orientation of the cholesteric liquid crystalline media, which have a short pitch, in these displays by making the system non-symmetric. The media comprise a bimesogenic component, component A and a chiral component, component B. The display comprises one substrate on which the liquid crystal is oriented homogeneously and preferably a second substrate on which the liquid crystal is oriented homeotropically.
Claims18
A liquid crystal display comprising
- a first and second substrate
- each substrate bearing one or more electrodes and
- the first substrate bearing an orientation layer for planar alignment of liquid crystals or being otherwise treated for planar orientation of liquid crystals,
- the second substrate having either homogeneous or homeotropic alignment.
- a cholesteric liquid crystal material comprising
- a component A, comprising one or more bimesogenic compounds with an odd number of atoms in the spacer group between the two mesogenic units and with a non-symmetric structure,
- a chiral component B comprising one or more compounds, wherein
- the cholesteric liquid crystal material is aligned in a uniformly lying helix structure with a helical pitch of 400 nm or less.
A cholesteric liquid crystal material comprising
- a component A, comprising one or more bimesogenic compounds with an odd number of atoms in the spacer group between the two mesogenic units and with a non-symmetne structure,
- a chiral component B comprising one or more compounds, wherein
- the cholesteric liquid crystal material is aligned in a uniformly lying helix structure with a helical pitch of 400 nm or less.
Dependencies are inferred from the claim text.