POLARIZED LIGHT EMITTING LIGHT GUIDE PLATE, METHOD OF MANUFACTURING THE SAME AND ILLUMINATOR FOR FLAT PANEL DISPLAY DEVICE USING POLARIZED LIGHT EMITTING LIGHT GUIDE PLATE
First Claim
1. A polarized light emitting light guide plate comprising:
- a transparent substrate comprising an optically isotropic material, in which light incident through a lateral side of the polarized light emitting light guide plate travels;
an anisotropic liquid crystal polymer layer, formed on an upper surface of the substrate and having a first refractive index with respect to a first polarization component of light and a second refractive index, different from the first refractive index, with respect to a second polarization component of light, perpendicular to the first polarization component;
a polarization separation microstructure, formed at an interface between the transparent substrate and the liquid crystal polymer layer, which refracts or reflects the first polarization component, and transmits the second polarization component; and
a liquid crystal alignment microstructure disposed on the upper surface of the substrate between the micro prisms, which aligns the liquid crystals in the liquid crystal polymer layer in one direction,wherein a refractive index of the polarization separation microstructure is substantially equal to a refractive index of the substrate, and the first refractive index of the liquid crystal polymer layer is greater than the refractive index of the substrate, and the second refractive index of the liquid crystal polymer layer is substantially equal to the refractive index of the substrate.
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Accused Products
Abstract
A polarized light emitting light guide plate includes: a transparent substrate of optically isotropic material, in which the light incident through a lateral side thereof travels; an anisotropic liquid crystal polymer layer formed on an upper surface of the substrate and having first and second refractive indices with respect to first and second perpendicular polarization components; and a polarization separation microstructure formed at an interface between the transparent substrate and the liquid crystal polymer layer, which refracts or reflects the first polarization component and transmits the second polarization component. The refractive index of the polarization separation microstructure is substantially equal to the refractive index of the substrate; the first refractive index of the liquid crystal polymer layer is greater than the refractive index of the substrate, and the second refractive index of the liquid crystal polymer layer light is substantially equal to the refractive index of the substrate.
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Citations
11 Claims
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1. A polarized light emitting light guide plate comprising:
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a transparent substrate comprising an optically isotropic material, in which light incident through a lateral side of the polarized light emitting light guide plate travels; an anisotropic liquid crystal polymer layer, formed on an upper surface of the substrate and having a first refractive index with respect to a first polarization component of light and a second refractive index, different from the first refractive index, with respect to a second polarization component of light, perpendicular to the first polarization component; a polarization separation microstructure, formed at an interface between the transparent substrate and the liquid crystal polymer layer, which refracts or reflects the first polarization component, and transmits the second polarization component; and a liquid crystal alignment microstructure disposed on the upper surface of the substrate between the micro prisms, which aligns the liquid crystals in the liquid crystal polymer layer in one direction, wherein a refractive index of the polarization separation microstructure is substantially equal to a refractive index of the substrate, and the first refractive index of the liquid crystal polymer layer is greater than the refractive index of the substrate, and the second refractive index of the liquid crystal polymer layer is substantially equal to the refractive index of the substrate. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of manufacturing a polarized light emitting light guide plate comprising:
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providing an isotropic transparent substrate having a polarization separation microstructure and a liquid crystal alignment microstructure on an upper surface thereof; coating the upper surface of the transparent substrate with photocurable anisotropic liquid crystals and aligning the photocurable anisotropic liquid crystals in one direction; and forming an anisotropic liquid crystal polymer layer having a first refractive index with respect a first polarization component and a second refractive index, different from the first refractive index, with respect to a second polarization component perpendicular to the first polarization component, by radiating UV light onto the photocurable anisotropic liquid crystals; wherein a refractive index of the polarization separation microstructure is substantially equal to a refractive index of the substrate, and the first refractive index of the liquid crystal polymer layer is greater than the refractive index of the substrate, and the second refractive index of the liquid crystal polymer layer is substantially equal to the refractive index of the substrate. - View Dependent Claims (9, 10, 11)
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Specification