Liquid crystal cell which can have a homeotropic structure with compensated birefringence of said structure
DCFirst Claim
1. A liquid crystal cell of the electrically controlled birefringence type, comprising an assembly having a liquid crystal layer which can have a homeotropic structure and electrodes located on either side of the layer and whereof at least one is transparent, wherein one of the sides of said assembly is exposed to an incident light, wherein the cell also comprises, at least on said side, a means for polarizing the incident light, and wherein the thickness of the layer and each polarization means are intended to bring about a compensation of the birefringence of the liquid crystal layer in its homeotropic structure so that the cell has a high contrast for said structure in the case of an oblique observation performed in a given observation plane.
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Abstract
Liquid crystal cell having a homeotropic structure, with compensated birefringence for said structure.
The cell comprises a liquid crystal layer which can have a hometropic structure and electrodes located on either side of the layer and whereof at least one is transparent. It also comprises means for compensating the birefringence of the liquid crystal layer in its homeotropic structure, so that the cell has a high contrast for said structure, in the case of an oblique observation made in a given observation plane.
Application to the construction of data display means.
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10 Claims
- 1. A liquid crystal cell of the electrically controlled birefringence type, comprising an assembly having a liquid crystal layer which can have a homeotropic structure and electrodes located on either side of the layer and whereof at least one is transparent, wherein one of the sides of said assembly is exposed to an incident light, wherein the cell also comprises, at least on said side, a means for polarizing the incident light, and wherein the thickness of the layer and each polarization means are intended to bring about a compensation of the birefringence of the liquid crystal layer in its homeotropic structure so that the cell has a high contrast for said structure in the case of an oblique observation performed in a given observation plane.
Specification