Illuminator for flat panel display device and illuminator for double-sided flat panel display device
First Claim
1. An illuminator for a flat panel display device comprising:
- a light source which generates light;
a light guide plate that guides and distributes the light generated by the light source and is made of optically isotropic material;
a collimator that is disposed between an end of the light guide plate and the light source and guides the light from the light source onto the light guide plate with a predetermined incident angle;
a polarization separation layer that is made of optically anisotropic material, has two refractive indices and is formed on the light guide plate to transmit first polarized light from the light guide plate and reflect second polarized light from the light guide plate; and
a beam out-coupling layer that is formed on the polarization separation layer and out-couples the light incident from the polarization separation layer.
1 Assignment
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Accused Products
Abstract
An illuminator for a flat panel display device is provided. The illuminator includes a light source generating light; a light guide plate that guides and distributes the light generated by the light source and is made of optically isotropic material; a collimator that is disposed between an end of the light guide plate and the light source and guides the light from the light source onto the light guide plate with a predetermined incident angle; a polarization separation layer that is made of optically anisotropic material having two refractive indices and formed on the light guide plate to transmit first polarized light from the light guide plate and reflect second polarized light from the light guide plate; and a beam out-coupling layer that is formed on the polarization separation layer and out-couples the light incident from the polarization separation layer.
33 Citations
33 Claims
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1. An illuminator for a flat panel display device comprising:
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a light source which generates light;
a light guide plate that guides and distributes the light generated by the light source and is made of optically isotropic material;
a collimator that is disposed between an end of the light guide plate and the light source and guides the light from the light source onto the light guide plate with a predetermined incident angle;
a polarization separation layer that is made of optically anisotropic material, has two refractive indices and is formed on the light guide plate to transmit first polarized light from the light guide plate and reflect second polarized light from the light guide plate; and
a beam out-coupling layer that is formed on the polarization separation layer and out-couples the light incident from the polarization separation layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. An illuminator for a double-sided flat panel display device comprising:
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a light source which generates light;
a light guide plate that guides and distributes the light generated by the light source and is made of optically isotropic material;
a collimator that is disposed between an end of the light guide plate and the light source and guides the light from the light source onto the light guide plate with a predetermined incident angle;
a first polarization separation layer that is formed on a top surface of the light guide plate and transmits a first polarized light from the light guide plate and reflects a second polarized light from the light guide plate;
a second polarization separation layer that is formed on a bottom surface of the light guide plate and reflects a first polarized light from the light guide plate and transmits a second polarized light from the light guide plate; and
beam out-coupling layers that are formed on the outer surfaces of the first and second polarization separation layers and out-couple the light incident from each of the polarization separation layers. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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Specification