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US 5,687,020 AGranted
Image projector using acousto-optic tunable filter
AssigneeSamsung Electronics Co., Ltd.
InventorsSung-soo Park, Sang-hak Lee
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Abstract
A high definition image projector is provided for modulating light using an acousto-optic tunable filter according to image signals and projecting the modulated light on a screen. An image is obtained by modulating a light beam by pixel units according to the image to be displayed and directly projecting the modulated light beam on the screen in corresponding pixel units. High quality images can thus be displayed on a large screen. By adopting a high-output light source, a high luminance image can be obtained.
Claims10
An image projector comprising:
- image signal generating means for generating optical image signals, said image signal generating means including a parallel light generator for generating parallel white light comprising:
- a light source for generating white light;
- light focusing means for focusing the white light;
- a pin hole for removing aberration from the white light focused by said light focusing means;
- a collimating lens for collimating the white light passing through the pin hole;
- and
- a polarizer for selectively passing linearly polarized light of the white light collimated by said collimating lens;
- image signal providing means for generating electric image signals;
- means for modulating the white light to produce optical image signals corresponding to respective colors, in response to the electric image signals;
- and
- light scanning means for scanning the optical image signals in two orthogonal directions.
8 more elements
An image projector comprising:
- image signal generating means for generating optical image signals including:
- a parallel white light generator for generating parallel white light;
- image signal providing means for generating electric image signals;
- and
- means for modulating the white light to produce optical image signals corresponding to respective colors, in response to the electric image signals, comprising:
- an acousto-optic tunable filter for converting the parallel white light into red, green, and blue optical image signals, in response to the electric image signals;
- a first convergent lens for focusing the parallel white light on said acousto-optic tunable filter;
- and
- a second convergent lens for focusing the optical image signals;
- and
- light scanning means for scanning the optical image signals.
8 more elements
Dependencies are inferred from the claim text.