| 摘要 |
A projection-type display apparatus including a light source, an integrator whose input plane receives a light emitted from the light source and whose output plane serves as a surface illuminant, an image forming device modulating an incident linearly-polarized light beam to form an image in accordance with a video signal, a polarization-conversion device converting a uniform light beam exiting from the integrator into a linearly-polarized light beam to be applied to the image forming device, and a projection device projecting the image formed by the image forming device. The light source is constituted by a light emitting diode.
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