Back to results
US 5,635,106 AGranted
Liquid crystal composition and cells containing it
AssigneeAsulab S.A.
InventorsNaci Basturk, Thierry Chuard, Robert Deschenaux
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeAsulab S.A.
InventorsNaci Basturk, Thierry Chuard, Robert Deschenaux
Estimating the term…
A liquid crystal composition comprising a low molecular weight liquid crystal in the interior of which a cross-linking network is formed by polymerization of a prepolymer of formula I: ##STR1## X being a non-mesogenic bivalent radical, the free bonds of which form an angle smaller than 180.degree.; B.sub.1 and B.sub.2 being rigid cyclic groups which would confer liquid crystal properties to the prepolymer if X was such that=180.degree.. R.sub.1 and R.sub.2 being the same or different, each representing an optionally substituted alkyl, alkoxy, arylalkyl or aralalkoxy chain; A.sub.1 and A.sub.2 being the same or different, each representing a reactive polymerizable function. Display cells comprising the liquid crystal composition having a low commutation voltage.
A liquid crystal composition in the form of an anisotropic gel which is transparent in a non-commutated state and opaque when a slightly elevated electric field is applied, having a low molecular weight liquid crystal inside of which is formed a cross-linking network obtained by polymerisation of a prepolymer, wherein said prepolymer is not a liquid crystal and its chemical structure is such that the network formed by polymerisation presents a degree of order intermediate between that of an oriented network obtained from a prepolymeric liquid crystal and that of a network which is not ordered and which is obtained using a strictly isotropic prepolymer.
Dependencies are inferred from the claim text.