Illumination device and projector
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United States of America Patent
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Jan 16, 2018
Grant Date -
Jun 16, 2016
app pub date -
Aug 1, 2014
filing date -
Aug 5, 2013
priority date (Note) -
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Abstract
An illumination device including a light source device, a rotary diffusion plate, which includes a first surface, a second surface, a diffusion section disposed on the first surface, and a detection section disposed on at least one of the first surface and the second surface, and to which light from the light source device is input, a light collecting optical system to which light from the diffusion section is input, a detector adapted to detect light from the detection section, and a control device adapted to control the light source device in accordance with a signal output from the detector. The detection section is disposed at a position different from a position where the light from the light source device enters the diffusion section.
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