Patent ID: 8884937

Claim:
A projection apparatus comprising: an image panel configured to provide an image beam and having a displaying area, wherein the displaying area is a range that the image beam projects on and the displaying area has a horizontal direction and a vertical direction perpendicular to the horizontal direction; a projection lens disposed on a transmission path of the image beam and having an optical axis, wherein the projection is configured to project the image beam to form an image; and a control unit coupled to the image panel, wherein when the optical axis is tilted with respect to a normal of the image, the control unit commands a first portion of the displaying area to show a compressed frame corresponding to the image and commands a second portion of the displaying area to show a black border, the compressed frame is compressed along the vertical direction in a compressed ratio relative to a tilt angle of the optical axis with respect to the normal of the image, the compressed frame and the black border are arranged along the vertical direction, and a center of the displaying area keeps static when the control unit commands.