Patent ID: 9726965
Date: 2017-08-08
CPC Classifications: G03B,G09G,H04N

Claim:
1. A projection device comprising: a projection unit including a display element in which a plurality of pixel lines each formed by a plurality of pixels arranged in a first direction are arranged in a second direction perpendicular to the first direction and an optical system that projects light emitted from the display element and projecting an image based on input image data; a first correction unit generated on a main storage device and configured to correct a first direction scale of each line data of the image data that corresponds to each of the pixel lines based on a position of the each of the pixel lines in the second direction in the display element and a second-direction component of inclination of a projection direction of the projection unit with respect to a normal line of a projection face onto which the image is projected; a second correction unit generated on the main storage device and configured to correct a second direction scale of each pixel data of the image data after the correction performed by the first correction unit based on a position of each pixel in the second direction in the display element and the second-direction component of the inclination of the projection direction of the projection unit with respect to the normal line of the projection face onto which the image is projected; an image cutting-out unit realized by a module of a program operating on a CPU and configured to cut-out image data of an area, which is projected from the projection unit, of the image data after the correction performed by the second correction unit and input the image data of the area to the projection unit; a first correction control unit generated on the main storage device and configured to calculate a first correction coefficient used for correcting the first direction scale of each line data of the image data that corresponds to each of the pixel lines based on a position of the each of the pixel lines in the second direction in the display element and the second-direction component of the inclination of the projection direction of the projection unit with respect to the normal line of the projection face onto which the image is projected; and a second correction control unit generated on the main storage device and configured to calculate a second correction coefficient used for correcting the second direction scale of each pixel data in the second direction in the image data after the correction performed by the first correction unit based on a position of the each pixel in the second direction in the display element and the second-direction component of the inclination of the projection direction of the projection unit with respect to the normal line of the projection face onto which the image is projected, wherein the first correction unit is configured to correct the first direction scale of each line data of the image data that corresponds to each of the pixel lines by using the first correction coefficient calculated by the first correction unit, and wherein the second correction unit is configured to correct the second direction scale of each pixel data in the second direction by using the second correction coefficient calculated by the second correction control unit.