KR970019541A - Apparatus and method for video equipment for liquid crystal projector using color separation / synthesis prism - Google Patents

Abstract

The present invention relates to a liquid crystal projector equipped with a color separation / synthesis prism, and is used as a large screen display for conferences, presentations, seminars, classes, or multimedia movie screenings, and receives light from the light source and the light source 10. A color separation and color synthesizing prism 52 composed of an octahedron with a polarization beam separator 51 and an octahedron in contact with one side of the polarization beam separator 51 and forming a tetrahedron in cross section, and the color separation and color synthesis prism Reflective liquid crystal panels 53, 54, and 55 in contact with the three surfaces of the opposite side in contact with the polarizing beam separator 51 at 52, and color separation from the polarizing beam separator 51 at the polarizing beam separator 51. And a projection lens system 17 which is in contact with the opposite side of the surface in contact with the color synthesizing prism 52. The polarizing beam separator of the color separation / synthesis prism is bonded and modularized to make the dichroic mirror a prism. Coated by After the assembly, it is easy to assemble the dichroic mirror and easy to align the path of the light (Align).

Description

Apparatus and method for video equipment for liquid crystal projector using color separation / synthesis prism

Since this is an open matter, no full text was included.

5 is a perspective view of a video projector optical system using a reflective liquid crystal and a color separation / composite prism according to the present invention.

Claims (14)

A light source 10, a polarizing beam separator 51 for receiving light from the light source 10 under the light source and transmitting only one polarization, and a cross-section of a tetrahedron in contact with the polarizing beam separator 51; One polarization incident while being in contact with the three-sided surface of the opposite side in contact with the polarization beam separator 51 and the color separation and color synthesizing prism 52 which is composed of a polyhedron and separates and synthesizes three colors of red, green, and blue light. Reflective liquid crystal panels 53, 54, and 55 for controlling light of the projection lens 17 and projection lens systems 17 in contact with opposite sides of the polarizing beam separator 51 and the prism 52 in contact with each other. An image device apparatus for a liquid crystal projector using color separation and color synthesis prism, characterized in that consisting of). The liquid crystal projector according to claim 1, wherein the polarization beam separator (51) reflects only one polarized wave (S wave) of incident light and transmits the other polarized wave (P wave). Device for video equipment. 2. The apparatus of claim 1, wherein the color splitting / synthesis combined prism (52) comprises two equilateral triangle prisms and two equilibrium quadrilateral prisms. The color separation / synthesis combined prism 52 of the polarized white light is reflected from the (61) plane and the (63) plane to be incident on the red liquid crystal panel 55. Imaging device for liquid crystal projectors using color separation and color synthesis prism. The color separation / synthesis combined prism 52 of the polarized white light is incident on the color separation / synthesis prism 51 and then reflected from the (64) and 62 surfaces. Imaging device for a liquid crystal projector using a color separation and color synthesis prism characterized in that the incident on the liquid crystal panel (54). The color separation and color combining and synthesizing combination prism 52 of the polarized white light is transmitted through the prism 52, the color separation and color characterized in that the incident to the green liquid crystal panel 53 Imaging device for liquid crystal projectors using a synthetic prism. According to claim 1, wherein the liquid crystal panel (53, 54, 55) for image forming control is the Han Chinese polarized light incident through the prism is rotated by 90 degrees of the polarization direction when the voltage is applied to the panel and sent back along the incident path, the panel And a color separation and color synthesizing prism that emits incident polarization again when no voltage is applied to the liquid crystal projector. The apparatus of claim 1, wherein the color separation / synthesis combined prism (52) and the polarization beam splitter (51) are bonded to each other to be modularized and compact. White light is incident from the light source (S101), the step of determining whether the incident white light is applied to the S wave (S102), and the incident white light is determined by the Spy surface polarization beam splitter 51 to reflect (S103) ), And determining the white light incident at the step S102 to transmit the light at the P pie surface polarization beam splitter 51 (S104), and the white light of the S-wave reflected at the step S103 to the prism 52. Color separation step (S105) for separating into red, green, and blue tricolor light through (), and incident (S106) for entering the separated light into a corresponding liquid crystal panel, and determining whether a voltage is applied to the liquid crystal panel. Step S107, when voltage is applied to the liquid crystal panel, converting the S wave incident to the liquid crystal panel by 90 degrees to convert the P wave into P wave (S108), and converting the converted P wave through the prism 52 to the polarization beam separator ( 51) and a voltage is applied to the liquid crystal panel in step S109. Otherwise, the S wave incident on the liquid crystal panel is reflected as S wave (S111), and the S wave reflected in the step S111 is reflected by the polarization beam separator 51 through the prism 52 (S112). And (S110) projecting the transmitted P-wave through the non-lens system (17) in the step (S109). 10. The method of claim 9, wherein in steps S102 and S103, the white light from the light source 10 is determined (S102) and reflected by the S-py polarization beam splitter (S103). How to project video images. 10. The method of claim 9, wherein in steps S102 and 104, the white light from the light source 10 is judged (S102) and transmitted through the P-plane polarization beam splitter (S104). How to project video images. The red liquid crystal panel 55 according to claim 9, wherein in the color separation step S105, red polarized light is incident on the color separation / synthesis prism 52 after being reflected on the (61) and (63) planes of the white light. A video image projection method using color separation and synthesis prisms characterized in that the incident. 10. The method of claim 9, wherein in the color separation step (S105), blue polarization of the white light is incident on the color separation / synthesis prism 52 and then reflected on the (64) and (62) planes, and thus the blue liquid crystal panel (54). A video image projection method using color separation and synthesis prisms characterized in that the incident. 10. The method of claim 9, wherein in the color separation step S105, green polarization of white light is transmitted through the color separation / synthesis prism 52 and incident on the green liquid crystal panel 53. How to project video images used. ※ Note: The disclosure is based on the initial application.