Liquid-crystal medium
AssigneeMerck Patent GmbH
InventorsSven Christian Laut, Tzu-Huan Tseng, Kuang-Ting Chou, Chi-Shun Huang
Life of this patent
Estimating the term…
Abstract
A liquid-crystal (LC) medium which is based on a mixture of polar compounds and is substantially dielectrically neutral, its use for optical, electro-optical and electronic purposes, in particular as optical retarder or optical compensator in LC displays, an optical retarder or optical compensator containing the LC medium, an optical, electrooptical or electronic device containing the optical retarder or optical compensator, and a process of manufacturing the optical retarder or optical compensator.
Claims20
An LC medium which comprises a first component A which has a dielectric anisotropy Δε of ≥+0.5, and a second component B which has a dielectric anisotropy Δε of ≤−0.5, wherein the proportions of the components A and B are selected such that the resulting dielectric anisotropy Δε of the LC medium is −0.3 to +0.3, and wherein the LC medium shows uniform alignment, wherein the dielectric anisotropies are all determined at 20° C. and 1 KHz.
An LC medium which comprises a first component A which has a dielectric anisotropy Δε of ≥+0.5, a second component B which has a dielectric anisotropy Δε of ≤−0.5, and a third component C which has a dielectric anisotropy Δε from −0.5 to +0.5, wherein the proportions of the components A, B and C are selected such that the resulting dielectric anisotropy Δε of the LC medium is −0.3 to +0.3, wherein the dielectric anisotropies are all determined at 20° C. and 1 KHz.
Dependencies are inferred from the claim text.