The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 09, 2001
Filed:
Feb. 29, 2000
Soon-cheol Choi, Suwon, KR;
Han-il Ko, Suwon, KR;
Samsung Electronics Co., Ltd., Kyungki-do, KR;
Abstract
A reflection type projector in which the brightness of light projected onto a screen increases by simultaneously overlapping three colors used for representation of a color image. The reflection type projector includes a light source, first and second dichromatic mirrors arranged on an optical path for transmitting and reflecting input light according to the wavelength thereof, first, second and third image forming devices for generating an image corresponding to each color from input light, a first prism arranged on an optical path between the first dichromatic mirror and the first image forming device, a second prism arranged on an optical path between the second dichromatic mirror and the second image forming device, and a third prism arranged on an optical path between the second dichromatic mirror and the third image forming device. A dichromatic beam splitter is provided having first and second mirror surfaces for selectively transmitting or reflecting light according to the wavelength thereof so that the light input passing the first, second and third prisms is output in one direction. A correction prism is installed on an exit surface of the dichromatic beam splitter for allowing an optical axis of the light input to the dichromatic beam splitter passing each of the first, second and third prisms to be input approximately perpendicular to each of three incident surfaces of the dichromatic beam splitter. A projection lens unit is provided for magnifying and projecting light input from the dichromatic beam splitter toward a screen.