PROJECTION OPTICAL SYSTEM AND PROJECTION DISPLAY UNIT USING THE SAME
First Claim
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1. A projection optical system comprising:
- a light source;
an optical waveguide into which light from the light source enters and from which the light exits as reflected light;
a diffuser diffusing light that has exited from the optical waveguide;
a prism sheet into which light diffused by the diffuser enters and in which prisms are arranged on one plane; and
a rod integrator into which light transmitted through the prism sheet enters.
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Abstract
A projection optical system which improves the illumination efficiency includes a light source, an optical waveguide into which light from the light source enters and from which the light exits as reflected light, a diffuser diffusing light that has exited from the optical waveguide, a prism sheet into which light diffused by the diffuser enters and in which prisms are arranged on one plane, and a rod integrator into which light transmitted through the prism sheet enters.
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15 Claims
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1. A projection optical system comprising:
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a light source; an optical waveguide into which light from the light source enters and from which the light exits as reflected light; a diffuser diffusing light that has exited from the optical waveguide; a prism sheet into which light diffused by the diffuser enters and in which prisms are arranged on one plane; and a rod integrator into which light transmitted through the prism sheet enters. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification