| 摘要 |
An illumination device integrated into a projection type display, and projection type projector include a combination prism for combining RGB light emitted from RGB LED light sources and causing the combined light to be emitted to a single-plate light valve, wherein the emission of the LED light sources is controlled in response to the PWM drive control of the single-plate light valve. An incident angle (emitted angle) theta 2 and an incident (emitting) size d 2 are set to the following relation through kaleidoscopes with respect to the divergent angle theta 1 and the diverging size d 1 of the LED light sources. <?in-line-formulae description="In-line Formulae" end="lead"?>d 1 .sin theta 1= d 2 .sin theta 2 <?in-line-formulae description="In-line Formulae" end="tail"?>
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