Patent ID: 9158184
Filing Date: 2015-10-13
Classification: G03B,H04N

Abstract:
1. A projector device comprising: a projector configured to project an image onto a projection surface; an accelerometer configured to detect inclination of the projector with respect to a horizontal surface to output an inclination angle value of the projector; and a processor configured to: set a sampling time period during which the accelerometer outputs the inclination angle value of the projector at a value; set a value of limit angle value to be greater than a minimum angle value, the minimum angle value defining a minimum inclination angle value of the projector at which the projector is subject to distortion correction by the processor; calculate a representative angle value of a current sampling time period based on a plurality of inclination angle values of the projector that are detected by the accelerometer for the current sampling time period, the current sampling time period having the value; calculate a difference between the representative angle value obtained for the current sampling time period and a representative angle value obtained for a previous sampling time period, the previous sampling time period being a sampling time period that immediately precedes the current sampling time period; determine whether the difference in the representative angle values is equal to or greater than the limit angle value to generate a determination result; and correct trapezoidal distortion in the image to be projected based on the representative angle value of the current sampling time period when the determination result indicates that the difference in the representative angle values is equal to or greater than the limit angle value.