Projection display device and filter structural body

Abstract

[Object] To propose a projection display device that includes a filter structural body that is excellent in pressure-loss recoverability and can be miniaturized. [Solution] There is provided a projection display device, including: a filter structural body in which a plurality of filters each including a folding structure in which a concavity-convexity is repeated are stacked. In the filter structural body, respective convex portions of the filters are made to coincide, and between a pitch of any of the filters, one concave portion or a plurality of concave portions of another filter is or are accommodated, and in an inside of the filter having a maximum length in a vertical direction relative to a filter surface, another filter is accommodated.

Dependencies are inferred from the claim text.