| 摘要 |
Red, green and blue light beams from a light source portion travel via a first optical system and enter a reflecting surface of a rotating polygon mirror at different angles so as not to overlap each other. The rotating polygon mirror makes these light beams perform scanning when reflecting these light beams. The light beams for the scanning enter a second optical system at different angles and are led to different positions on an image display panel. The second optical system forms an image that is rotated by 90° from that on the rotating polygon mirror on the image display panel. On the image display panel, belt-like regions illuminated by the light beams of individual colors are formed in parallel with each other, and these illuminated regions are moved continuously by the scanning. Each pixel of the image display panel is driven by a signal corresponding to a color of light entering this pixel. A formed color image is magnified and projected by a projection optical system. With such a projection-type image display apparatus, it becomes possible to achieve a display with a high efficiency of light utilization and a high resolution. In addition, since the second optical system rotates the light beams from the rotating polygon mirror by 90° and then leads them to the image display panel, a widely-used image display panel can be used. Accordingly, an image display apparatus that is small, thin and inexpensive can be achieved.
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