Reflective liquid crystal display device and reflective liquid crystal display device incorporating touch panel arranged therefrom
First Claim
1. A 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 dielectric anisotropy; and
a circular polarizing unit that selectively passes either right handed or left handed substantially circularly polarized light out of a plurality of wavelengths of natural light in the visible spectrum,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, andwherein, said incoming substantially circularly polarized light being linearly polarized at a surface of said first substrate in a plurality of directions respectively representative of said plurality of wave lengths of said natural light to thereby create a display.
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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
15 Claims
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1. A 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 dielectric anisotropy; and a circular polarizing unit that selectively passes either right handed or left handed substantially circularly polarized light out of a plurality of wavelengths of natural light in the visible spectrum, 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, and wherein, said incoming substantially circularly polarized light being linearly polarized at a surface of said first substrate in a plurality of directions respectively representative of said plurality of wave lengths of said natural light to thereby create a display. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 14, 15)
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13. A 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 dielectric anisotropy; and at least one optical retardation compensator unit that selectively passes either right handed or left handed substantially circularly polarized light out of a plurality of wavelengths of natural light in the visible spectrum, wherein, the at least one optical retardation compensator unit is disposed such that a major surface of the at least one optical retardation compensator unit is on a liquid crystal layer side, and the at least one optical retardation compensator unit has a linear polarizer plate provided adjacent to a side opposite to the major surface, the substantially circularly polarized light exiting the at least one optical retardation compensator unit through the major surface when natural light enters the optical retardation compensator unit, and wherein, said incoming substantially circularly polarized light being linearly polarized at a surface of said first substrate in a plurality of directions respectively representative of said plurality of wave lengths of said natural light to thereby create a display.
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Specification