KR940020819A - Projection Image Display - Google Patents

Abstract

The present invention provides a projection type image display device that displays an image with M × N pixels, comprising: a light source for emitting white light, means for sequentially separating primary light beams having a plurality of primary colors from the white light, Focusing the primary light beams to focus and reflect them to the optical path control means, and adjusts the amount of light of each of the secondary light beams for each of the primary light beams that are adjusted to reflect the pixels. Means for making the primary beams parallel and reconverging the secondary beams, and focusing the primary beams so that the optical axis is spaced a predetermined distance apart so that the second optical path control means is not driven. A parallel lens for causing a predetermined amount of light beams to pass through the light amount adjusting means, and the first light beams to M × N second light beams corresponding to the pixels. Means for adjusting the optical paths by differently reflecting the furnaces, and a screen for sequentially receiving and synthesizing the secondary luminous fluxes for each of the primary luminous fluxes of which the amount of light is controlled is displayed. Therefore, since the image of each pixel forms a rectangle, an accurate image can be obtained, and the advertisement adjusting means can be easily installed since the angle is not finely adjusted.

Description

Projection Image Display

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

2 is a schematic diagram of a projection image display apparatus according to the present invention.

Claims (9)

A projection type image display device displaying an image with M × N pixels, comprising: a light source for emitting white light, means for separating primary light beams having a plurality of primary colors from the white light, and the respective primary light beams Means for focusing and reflecting the light to the optical path adjusting means, and adjusting the amount of light of each of the secondary light beams relative to each of the primary light beams whose light path is adjusted to reflect the pixels; The primary beams are paralleled and the secondary beams are focused again, and the focus and the optical axis of the primary beams are positioned to be spaced apart by a predetermined distance so that the predetermined amount of light of the secondary beams when the optical path control means is not driven. Parallel paths for passing the light amount adjusting means and M × N secondary light beams corresponding to the pixels to the primary light beams are different from each other in paths. And a screen for displaying an image by sequentially receiving and synthesizing secondary light beams for each of the primary light beams whose light amount is adjusted, to display an image. The projection image display apparatus according to claim 1, wherein said optical separation means comprises a rotating color wheel that is evenly divided into regions capable of separating red, green, and blue light. The projection image display apparatus according to claim 2, wherein the color wheel rotates by an integral multiple of a field or frame of an image signal. The projection image display apparatus according to claim 1, wherein the light quantity adjusting means includes a reflecting surface reflecting the primary light beams to the optical path adjusting means and gaps for adjusting and passing the light amount of each of the second light beams. The projection image display apparatus according to claim 1, wherein the optical path adjusting means each comprises M x N actuators and mirror surfaces. The separation distance Δt between the focal point of the primary luminous fluxes and the optical axis of the parallel lens is Δt = f, Θmax, where f is the focal length of the parallel lens, and Θmax is the actuator. Projection image display device that is the maximum inclination angle of the field. 7. The projection image display apparatus according to claim 6, wherein the parallel lens is positioned in parallel with the optical path adjusting means. The projection image display device according to claim 4, wherein the phases are reversed after the secondary light beams pass through the gaps. The projection image display apparatus according to claim 1, further comprising a projection lens positioned between the light amount adjusting means and the screen to project the second light beams whose light amount is adjusted onto a screen. ※ Note: The disclosure is based on the initial application.