| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a compact projection display apparatus wherein semiconductor light sources can be easily cooled, regarding the projection display apparatus including the R, G and B semiconductor light sources, and for modulating R, G and B light beams emitted from the semiconductor light sources in accordance with R, G and B image signals and projecting the modulated light beams on a screen. <P>SOLUTION: The LEDs 1R, 1G and 1B are arranged so as to separately emit R, G and B light beams downward, and radiation fins 12R, 12G and 12B as cooling units are attached on the rear sides of the LEDs 1R, 1G and 1B while facing in the same direction. <P>COPYRIGHT: (C)2007,JPO&INPIT |
