Abstract: An image projection method and a projector are provided to be able to change aspect ratio or resolution of a projection image, without setting of keystone correction again. The projector sets a displayable region with a shape according to an aspect ratio and a resolution of the projection image. The projector converts coordinates of the displayable region into coordinates in a screen coordinate system, and generates a rectangular area with a desired aspect ratio in a region corresponding to the displayable region in the screen coordinate system and a portion included in a projecting range. The projector converts the coordinates of a rectangular area into coordinates of a range corresponding to the rectangular area in the panel coordinate system, forms an image in a range corresponding to the rectangular area, and projects the projection image on the screen.

Abstract: An image projection method and a projector are provided to be able to change aspect ratio or resolution of a projection image, without setting of keystone correction again. The projector sets a displayable region with a shape according to an aspect ratio and a resolution of the projection image. The projector converts coordinates of the displayable region into coordinates in a screen coordinate system, and generates a rectangular area with a desired aspect ratio in a region corresponding to the displayable region in the screen coordinate system and a portion included in a projecting range. The projector converts the coordinates of a rectangular area into coordinates of a range corresponding to the rectangular area in the panel coordinate system, forms an image in a range corresponding to the rectangular area, and projects the projection image on the screen.