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US 2003/0112400 A1Published application
Liquid crystal display device
AssigneeMinolta Co., Ltd.
InventorsTomoo Izumi, Chiyoshi Nozaki
Life of this patent
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Abstract
A liquid crystal display device has a pair of substrates, electrodes capable of selectively applying electric fields approximately vertical to and parallel with the substrates, and a liquid crystal composite showing a cholesteric phase and provided between the substrates. Permittivity anisotropy Δε of the liquid crystal satisfies the following conditions: Δε<0 and |Δε|>10.
Claims17
A liquid crystal display device comprising:
- a pair of substrates;
- electrodes capable of selectively applying electric fields approximately vertical to and parallel with the substrates;
- and
- a liquid crystal composite showing a cholesteric phase and provided between the substrates, the permittivity anisotropy Δε of said liquid crystal satisfying the following conditions:
- Δε<0
- |Δε|>10
3 more elements
A liquid crystal display device comprising:
- a first substrate formed with a first electrode;
- a second substrate formed with second and third electrodes;
- a liquid crystal composite showing a cholesteric phase provided between the first and second substrates;
- and
- a driver which selects a first state that a voltage is applied between the first electrode and the second electrode so that an electric field is generated in a direction penetrating through the first and second substrates or a second state that a voltage is applied between the second and third electrodes so that, an electric field is generated in a direction along the first and second substrates so as to drive the device, wherein the permittivity anisotropy Δε of said liquid crystal composite satisfies the following conditions:
- Δε<0
- |Δε|>10
4 more elements
A liquid crystal display device comprising:
- a first substrate formed with a first electrode;
- a second substrate formed with second and third electrodes;
- a liquid crystal composite having memory property and showing a cholesteric phase provided between the first and second substrates;
- and
- a driver which selects a first mode that a voltage is temporarily applied between the first and second electrodes so that an electric field is generated in a direction penetrating through the first and second substrates and the liquid crystal composite is set to a planar state or a second mode that a voltage is temporarily applied between the second and third electrodes so that an electric field is generated in a direction along the first and second substrates and the liquid crystal composite is set to a focal conic state so as to drive the device, and which maintains a display state by means of the memory property of the liquid crystal composite in a state that a voltage is not applied after the mode is selected, wherein the permittivity anisotropy Δε of the liquid crystal composite satisfies the following conditions Δε<0 and |Δε|>10, and the liquid crystal composite is not in a homeotropic state when the liquid crystal composite is switched from the planar state into focal conic state and from the focal conic state into the planar state.
2 more elements
Dependencies are inferred from the claim text.