Liquid crystal display device having improved viewing angle and brightness
First Claim
Patent Images
1. A liquid crystal display comprising:
- a light source unit;
a polarized light guide plate comprising an incident surface onto which unpolarized light from the light source unit is incident, wherein the polarized light guide plate polarizes, collimates, and out-couples the incident light;
a liquid crystal panel which modulates the light illuminated from the polarized light guide plate to form images; and
a diffusion layer which diffuses the light modulated in the liquid crystal panel, wherein;
the polarized light guide plate further comprises;
a first layer which guides the incident light;
a second layer formed of an optically isotropic material on the first layer, wherein out-coupling units comprising a first convex portion are repeatedly arranged on the second layer; and
a third layer formed of an optically anisotropic material on the second layer,a refractive index of the optically anisotropic material is greater than a refractive index of the second layer with respect to a first polarized light, and almost the same as the refractive index of the second layer with respect to a second polarized light,the first polarized light is perpendicular to the second polarized light, andthe polarized light guide plate out-couples the first polarized light;
wherein the liquid crystal panel comprises a first substrate upon which a first polarization plate is attached, a second substrate upon which a second polarization plate is attached, and a liquid crystal layer encapsulated between the two substrates; and
wherein the diffusion layer and one of the first polarization plate and the second polarization plate are formed as a single body at an outer side of the liquid crystal panel.
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Abstract
A liquid crystal display with an improved viewing angle and brightness is provided. The liquid crystal display includes a light source unit and a polarized light guide plate having an incident surface onto which unpolarized light from the light source unit is incident. The polarized light guide plate polarizes, collimates, and out-couples the incident light. The liquid crystal display also includes a liquid crystal panel which modulates the light out-coupled and illuminated from the polarized light guide plate to form images, and a diffusion layer which diffuses the light modulated in the liquid crystal panel.
19 Citations
16 Claims
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1. A liquid crystal display comprising:
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a light source unit; a polarized light guide plate comprising an incident surface onto which unpolarized light from the light source unit is incident, wherein the polarized light guide plate polarizes, collimates, and out-couples the incident light; a liquid crystal panel which modulates the light illuminated from the polarized light guide plate to form images; and a diffusion layer which diffuses the light modulated in the liquid crystal panel, wherein; the polarized light guide plate further comprises; a first layer which guides the incident light; a second layer formed of an optically isotropic material on the first layer, wherein out-coupling units comprising a first convex portion are repeatedly arranged on the second layer; and a third layer formed of an optically anisotropic material on the second layer, a refractive index of the optically anisotropic material is greater than a refractive index of the second layer with respect to a first polarized light, and almost the same as the refractive index of the second layer with respect to a second polarized light, the first polarized light is perpendicular to the second polarized light, and the polarized light guide plate out-couples the first polarized light; wherein the liquid crystal panel comprises a first substrate upon which a first polarization plate is attached, a second substrate upon which a second polarization plate is attached, and a liquid crystal layer encapsulated between the two substrates; and wherein the diffusion layer and one of the first polarization plate and the second polarization plate are formed as a single body at an outer side of the liquid crystal panel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification