PROJECTION DEVICE

WIPO Patent Application WO/2020/261851

A1

Provided is a projection device that can capture the entire projection image and can be useful for controlling the projection image.　A projector (100) comprises an imaging element (38) that captures an image of a screen SC through a portion of an optical system that projects an image from a display unit onto the screen SC. The imaging element (38) has a light reception surface (38a) in which a plurality of pixels are arranged two-dimensionally. In a state in which the image projected on the screen SC is formed at a position of the light reception surface (38a) by a portion of the optical system, when the image is set as a projected capture image g1, the width of the projected capture image g1 in a direction Y is set as L1, and the width of the light reception surface (38a) in the direction Y is set as D1, the relationship L1