| 摘要 |
The invention relates to an electro-optical cell ( 1 ) comprising a first ( 2 ) and a second ( 3 ) support member, an electro-optical medium ( 5 ) between the support members and an electrode arrangement ( 11, 12 ) on the support members such that an electric field can be applied, in the electro-optical medium, perpendicular to the support members, aligned with the support members or at an oblique angle ( 7 ) with respect to the support members. The electro-optical cell further comprises layers ( 14 ) of material with different dielectric constant between the support members in order to reduce the inhomogeneity of the electric field lines in the electro-optical medium. By having a layer of cholesteric liquid crystals between the support members, the electro-optical cell will function as a colour filter for varying applied fields. By introducing a particle suspension in a medium between the support members, an electro-optical cell is created that can be switched between a transmissive, reflective and partly deflective state.
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