KR970060965A - A stereoscopic projection type liquid crystal display device in which light utilization efficiency is improved through color light separation - Google Patents

Abstract

In particular, the present invention relates to a stereoscopic projection type liquid crystal display, and more particularly to a stereoscopic projection type liquid crystal display device which separates a white beam into R, G, and B color beams, separates each color beam into P polarized light beams and S polarized light beams, Projection-type liquid-crystal display device in which an image is formed by modulating the light intensity and then synthesizing and projecting it on a screen in an original state.

The apparatus separates the white beam into R, G, and B monochromatic beams using a dichroic separation filter, separates the separated monochromatic beams into P and S polarized beams, separates the separated beams into respective liquid crystal panels So that the light utilization efficiency can be increased. Accordingly, the present apparatus has the effect of ultimately improving the sharpness of the image quality projected on the screen.

Description

A stereoscopic projection type liquid crystal display device in which light utilization efficiency is improved through color light separation

Since this is a trivial issue, I did not include the contents of the text.

FIG. 2 is an optical path diagram showing an embodiment of a stereoscopic projection type liquid crystal display device according to the present invention. FIG.

FIG. 3 is an optical path diagram showing another embodiment of a stereoscopic projection type liquid crystal display device according to the present invention. FIG.

Claims (6)

A liquid crystal display device for modulating an intensity of a white beam emitted from a light source and projecting the light beam onto a screen to form an image, comprising: spectroscopy means for separating a white beam emitted from the light source into three color beams of R, G and B; Polarized light separating means for separating each of R, G, and B three-color beams separated by the spectroscope into a P polarized beam and an S polarized beam; A first optical path changing means for converting the polarized beams of the R, G, B polarized light separated from the polarized light separating means into optical beams of predetermined characteristics and entering the liquid crystal display elements; Liquid crystal display elements for modulating the intensity of the P polarized beam and the S polarized beam of each of the R, G, and B polarized light separated from the polarized light separating means to an image signal; A photosynthesis means for synthesizing the polarized beams of the same characteristics among the polarized beams of R, G, and B intensity-modulated by the liquid crystal display elements and outputting the polarized beams as a pair of P and S polarized beams; Second light path changing means for changing an optical path of a predetermined monochromatic beam among the polarized light separated R, G and B beams to enter the light synthesizing means; And a projection lens positioned on the optical path of the P-polarized beam and the S-polarized beam emitted from the light synthesis means and projecting the photosynthetic P, S polarized beam onto the screen to form an image. 2. The apparatus according to claim 1, wherein the spectroscopic means comprises a dichroic separation filter arranged in a line with respect to an emission beam emitted from the light source and selectively reflecting and separating only blue, red and green beams, respectively, Wherein the liquid crystal display device is a liquid crystal display device. The liquid crystal display device according to claim 1, wherein the liquid crystal display elements are arranged on the outgoing optical path for the P polarized beam and the S polarized beam of R, G, and B monochromatic beams separated from the polarized light separating elements, respectively A stereoscopic projection type liquid crystal display device. The liquid crystal display device according to claim 3, wherein the liquid crystal display elements arranged on the outgoing optical path of the P-polarized beam and the S-polarized beam of the R, G and B beams, respectively, Wherein the liquid crystal display device is formed as a single unit. The stereoscopic projection type liquid crystal display device according to claim 1 or 4, wherein the liquid crystal display element for modulating the intensity of the green beam is disposed between the second optical path changing means and the light synthesizing means. The stereoscopic projection type liquid crystal display of claim 1, wherein the first and second optical path changing means comprise total reflection mirrors. ※ Note: It is disclosed by the contents of the first application.