PROJECTION IMAGE DISPLAY

摘要

A white light beam from a light source portion (201) is separated into respective light beams of red, green and blue by a color separation optical system (204). The respective light beams are reflected by a rotating polygon mirror (207), travel via a second optical system (210) and form belt-like illuminated regions on an image display panel (212). By a rotation of the rotating polygon mirror (207), the illuminated regions of the respective light beams move continuously, and each pixel of the image display panel (212) is driven by a signal corresponding to a color of light entering this pixel. An image on the image display panel (212) is magnified and projected onto a screen by a projection optical system (216). The color separation optical system (204) has first and second reflecting mirrors that respectively reflect the respective light beams of red, green and blue, and these reflecting mirrors are arranged so that optical paths of the respective light beams have equal lengths from the light source portion (201) to the rotating polygon mirror (207). This makes it possible to provide a small projection-type image display apparatus that has a high efficiency of light utilization and can display an image with high resolution and enhanced color uniformity.