Optics: image projectors – Composite projected image – Reflector between lamp and screen
Patent
1993-07-01
1995-02-14
Cuchlinski, Jr., William A.
Optics: image projectors
Composite projected image
Reflector between lamp and screen
353 20, 353 34, G03B 2128
Patent
active
053899822
ABSTRACT:
An optical system of a liquid crystal projector includes a metal halide lamp as a light source of a high luminance, a polarized light prism for separating the light from the metal halide lamp into respective light elements of the visible rays in accordance with spectral characteristics of the light, a heat absorption filter for filtering off other rays except for the visible rays from the light in order to remove heat which is generated from the other rays, reflection liquid crystal panels which are each arranged at the front side or at a side of the polarized light prism and having a red, green or blue light reflection mirror mounted on the rear surface thereof, and a projection lens for composing the incident light elements from the liquid crystal panels into a composed color image and then projecting the composed color image on a screen. The light source emits a light having spectral characteristics in that the radiation of the red light element thereof is less intense than those of the green and the blue light elements, for thereby improving the color tone of the image. The polarized light prism and the reflection liquid crystal panels causes the optical path of the optical system to be shorter, for thereby improving the resolution of the color of the image and for also simplifying the construction of the optical system.
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Cuchlinski Jr. William A.
Dowling William C.
Goldstar Co. Ltd.
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