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AssigneeSamsung Electronics Co., Ltd.
InventorsJung-Uk Shim, Kyeong-Hyeon Kim, Nam-Heung Kim, Chang-Hun Lee, Seung-Beom Park
Estimating the term…
Two electrodes in parallel with each other are formed on one of two substrates, homeotropic alignment films are formed on the substrates and a liquid crystal material having positive dielectric anisotropy is injected between the substrates. When the voltage is applied to the two electrodes, a parabolic electric field between the electrodes drives the liquid crystal molecules. Since the electric field generated is symmetrical with respect to the boundary-plane equal distance from each of the two electrodes, the liquid crystal molecules are symmetrically aligned with respect to the boundary-plane. The electric field does not exert influences the liquid crystal molecules on the boundary-plane since the electric field on the boundary-plane is parallel with the substrates and perpendicular to the two electrodes; and thus, it is perpendicular to the liquid crystal molecules Here, the polarization of the light is changed while passing through the liquid crystal layer and as a result, only a part of the light passes through the polarizing plate. The transmittance of the light can be varied by controlling the magnitude of voltage applied to the two electrodes.
A liquid crystal display, comprising:
A liquid crystal display, comprising:
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
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Characterised by their geometrical arrangement: for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS]
Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers: for homeotropic alignment
Optical devices or arrangements for the control of light by modification of
Term end not estimated
1. Field of the Invention
The present invention relates to a liquid crystal display.
2. Description of the Related Art
The accompanying drawings, illustrate embodiments of the present invention and together with the description, serve to explain the principles of the invention.
FIGS. 1A and 1B are sectional views of a conventional TN-LCD;
FIGS. 2A and 2B are sectional views of a conventional IPS-LCD;
Embodiments of the present invention will become apparent from a study of the following detailed description when viewed in light of drawings.
FIGS. 3A to 3C illustrate a basic driving principle of an EOC-LCD according to a first embodiment of the present invention, and FIGS. 4A to 4C illustrate a basic driving principle of the EOC-LCD according to a second embodiment of the present invention.
Referring to FIGS. 3A to 3C and 4A to 4C, a pair of transparent glass substrates 10 and 20 having alignment films 90 respectively are formed facing each other. Two linear electrodes 30 and 40 parallel with each other are formed on the inner surface of a lower substrate 10 of the two substrates 10 and 20. The liquid crystal material is injected between the two glass substrates 10 and 20 to form a liquid crystal layer 70. The liquid crystal molecules 80 of the liquid crystal layer 70 are homeotropically aligned and thus are perpendicular to the two substrates 10 and 20. The liquid crystal molecules 80 may have a pre-lilt angle with respect to the two substrates 10 and 20. The two electrodes 30 and 40 may be transparent or opaque conductive material. Two polarizing plates 50 and 60, which polarize the passing light, are attached to the outer surfaces of the glass substrates 10 and 20 respectively.