Reflective liquid crystal display device and reflective liquid crystal display device incorporating touch panel arranged therefrom
First Claim
1. A reflective liquid crystal display device, comprising:
- a first substrate having a light reflectibility;
a second substrate having a light transmissibility;
a liquid crystal layer sandwiched between the first substrate and the second substrate, the liquid crystal layer being composed of twist-aligned nematic liquid crystal having a positive dielectric anisotropy; and
a circular polarizing unit comprising a linear polarizer and at least one optical retardation compensator unit, said circular polarizer unit selectively passes either right handed or left handed substantially circularly polarized light out of natural light in the visible spectrum; and
said at least one optical retardation compensator unit being provided between the linear polarizer and the liquid crystal layer to minimize influence from a residual phase difference of the liquid crystal layer,wherein,the circular polarizing unit is disposed such that a major surface of the circular polarizing unit is on a liquid crystal layer side, the substantially circularly polarized light exiting the circular polarizing unit through the major surface when natural light enters the circular polarizing unit.
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Abstract
A reflective color liquid crystal display device with a liquid crystal layer sandwiched between a first substrate having a light reflectibility and a second substrate having a light transmissibility. The liquid crystal layer being composed of twist-aligned nematic liquid crystal having a positive dielectric anisotropy. A circularly polarizing unit, including a single linear polarizer plate, selectively passes either right handed or left handed circularly polarized light out of natural light. The circularly polarizing unit is disposed so that a major surface of the circularly polarizing unit is on a liquid crystal layer side, the circularly polarized light exiting the circularly polarizing unit through the major surface when natural light enters the circularly polarizing unit. Various parameters of the liquid crystal layer are optimized for a liquid crystal layer having a twist angle in the range of 0° to 100°.
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Citations
13 Claims
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1. A reflective liquid crystal display device, comprising:
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a first substrate having a light reflectibility; a second substrate having a light transmissibility; a liquid crystal layer sandwiched between the first substrate and the second substrate, the liquid crystal layer being composed of twist-aligned nematic liquid crystal having a positive dielectric anisotropy; and a circular polarizing unit comprising a linear polarizer and at least one optical retardation compensator unit, said circular polarizer unit selectively passes either right handed or left handed substantially circularly polarized light out of natural light in the visible spectrum; and said at least one optical retardation compensator unit being provided between the linear polarizer and the liquid crystal layer to minimize influence from a residual phase difference of the liquid crystal layer, wherein, the circular polarizing unit is disposed such that a major surface of the circular polarizing unit is on a liquid crystal layer side, the substantially circularly polarized light exiting the circular polarizing unit through the major surface when natural light enters the circular polarizing unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification