Reflective-type liquid crystal display device including a single polarizer plate
First Claim
1. A reflective-type liquid crystal display device, comprising:
- a first substrate including a light-reflective electrode;
a transparent second substrate including a transparent electrode;
a nematic liquid crystal layer, sandwiched between the first and second substrates, having negative dielectric anisotropy and twisting with application of a voltage;
a plurality of optical retardation compensation plates disposed on a light-entering side of the second substrate; and
a single polarizer plate disposed on the light-entering side of the second substrate;
wherein surfaces, of the first and second substrates, that are in contact with the liquid crystal layer undergo substantially vertical alignment processing and the single polarizer plate is the only polarizer plate of the reflective-type liquid crystal display device, andwherein the liquid crystal layer has a natural pitch p, a layer thickness d, and a refractive index difference Δ
n with respect to characteristic polarization thereof selected so as to satisfy 0<
|d/p|<
1 and 135 nm ≦
Δ
n×
d≦
1200 nm.
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Accused Products
Abstract
A reflective-type liquid crystal display device in accordance with the present invention includes: a first substrate including a light-reflective electrode; a transparent second substrate including a transparent electrode; a nematic liquid crystal layer, sandwiched between the first and second substrates, having negative dielectric anisotropy, and twisting with application of a voltage; a plurality of optical retardation compensation plates disposed on a light-entering side of the second substrate; and a polarizer plate disposed on the light-entering side of the second substrate, wherein surfaces of the first and second substrates undergo substantially vertical alignment processing, and liquid crystal has a natural pitch p, a layer thickness d, and a refractive index differece Δn with respect to characteristic polarization thereof selected so as to satisfy 0<|d/p|<1 and 135 nm≦Δn×d≦1200 nm. Moreover, liquid crystal molecules on a surface of at least one of the first and second substrates tilt 3° to 30° with respect to a normal direction of that substrate. With this arrangement, a color-display-capable reflective-type liquid crystal display device with high contrast and excellent viewing angle characteristics can be obtained. Especially, such a reflective-type liquid crystal display device could be suitably applied to a liquid crystal display device with an integral pressure sensitive input device, provided with a touch panel.
169 Citations
35 Claims
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1. A reflective-type liquid crystal display device, comprising:
-
a first substrate including a light-reflective electrode; a transparent second substrate including a transparent electrode; a nematic liquid crystal layer, sandwiched between the first and second substrates, having negative dielectric anisotropy and twisting with application of a voltage; a plurality of optical retardation compensation plates disposed on a light-entering side of the second substrate; and a single polarizer plate disposed on the light-entering side of the second substrate; wherein surfaces, of the first and second substrates, that are in contact with the liquid crystal layer undergo substantially vertical alignment processing and the single polarizer plate is the only polarizer plate of the reflective-type liquid crystal display device, and wherein the liquid crystal layer has a natural pitch p, a layer thickness d, and a refractive index difference Δ
n with respect to characteristic polarization thereof selected so as to satisfy 0<
|d/p|<
1 and 135 nm ≦
Δ
n×
d≦
1200 nm. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 22, 23, 24, 26, 27, 28, 29, 30)
-
-
21. A reflective-type liquid crystal display device, comprising:
-
a first substrate including a light-reflective electrode; a transparent second substrate including a transparent electrode; a nematic liquid crystal layer, sandwiched between the first and second substrates, having negative dielectric anisotropy, and twisting with application of a voltage; a plurality of optical retardation compensation plates disposed on a light-entering side of the second substrate; and a single polarizer plate disposed on the light-entering side of the second substrate, wherein surfaces, of the first and second substrates, that are in contact with the liquid crystal layer undergo substantially vertical alignment processing and the single polarizer plate is the only polarizer plate of the reflective-type liquid crystal display device, and wherein liquid crystal molecules on a surface of at least one of the first and second substrates tilt 3°
to 30°
with respect to normal direction of that substrate. - View Dependent Claims (25, 31, 32, 33, 34, 35)
-
Specification