| 摘要 |
In a projector to which the present invention is applied, a distance sensor (21) measures distances between the projector and a plurality of points on a screen (31). An angle calculation unit (23) obtains a formula representing a screen surface, based on plural pieces of distance data representing results of measurement by the distance sensor (21), and obtains inclination angles Thetavand ThetaH of the screen (31) with respect to the light axis of a projection light. The angle calculation unit (23) supplies the obtained inclination angles Thetav and ThetaH to a trapezoidal correction unit (12). The trapezoidal correction unit (12) performs trapezoidal correction by using the supplied inclination angles Thetav and ThetaH.
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