Abstract: A control method for a projector includes, executing a first mode to generate a projection image projected onto a display surface by modifying a shape of an input image, accepting a change operation to the input image for changing a size of a display image displayed as the projection image is projected on the display surface or a position of the display image on the display surface, during the execution of the first mode, and shifting from the first mode to a second mode to control a change to the input image based on the change operation, when the change operation is accepted.

Abstract: A method for controlling a projector controls, via a control circuit, a projector having an input device accepting a startup operation giving an instruction to start up and a stop operation giving an instruction to stop. The method includes: starting startup processing an response to the startup operation and subsequently shifting to a preparation state to preparing for a normal state; setting a task of stop processing in response to the stop operation in the preparation state; and executing the task in response to finishing of the preparation state.

Abstract: A control method for a projector includes, executing a first mode to generate a projection image projected onto a display surface by modifying a shape of an input image, accepting a change operation to the input image for changing a size of a display image displayed as the projection image is projected on the display surface or a position of the display image on the display surface, during the execution of the first mode, and shifting from the first mode to a second mode to control a change to the input image based on the change operation, when the change operation is accepted.

Abstract: A method of controlling a projector configured to perform a scaling process on an input image to thereby project a projection image corresponding to the input image on a screen includes the steps of correcting a geometric configuration of the projection image with a correction amount, calculating, from the correction amount, a projection surface of the projection image corrected, and changing the scaling process so that an aspect ratio of the input image is reproduced in the projection surface.

Abstract: A method for controlling a projector controls, via a control circuit, a projector having an input device accepting a startup operation giving an instruction to start up and a stop operation giving an instruction to stop. The method includes: starting startup processing an response to the startup operation and subsequently shifting to a preparation state to preparing for a normal state; setting a task of stop processing in response to the stop operation in the preparation state; and executing the task in response to finishing of the preparation state.

Abstract: A projector includes a projection section which projects an all-white image and an all-black image onto a screen, a sensor which generates first sensing information by sensing the all-white image and generates second sensing information by sensing the all-black image, a differential image generation section which generates a differential image based on the first and second sensing information, an external light effect removal section, and a projection target area detection section which generates projection target area information on the position of a projection target area corresponding to the screen in the sensing area of the sensor based on the differential image from which the external light effect is removed.

Abstract: An exemplary aspect of the invention can provide a method for easily adjusting the distortion of a projected image. In adjusting the amount of distortion correction, values of the amount of distortion correction for a desired outline form to be formed based on desired positions are calculated after the desired positions can be specified. Then whether all the calculated values of the amount of distortion correction are within a predetermined range where an original image is transformable into a distortion correction image can be judged. If all the calculated values of the amount of distortion correction are within the predetermined range, the calculated values of the amount of distortion correction can be set in an image distortion correction part.

Abstract: A projector includes a projection section which projects an all-white image and an all-black image onto a screen, a sensor which generates first sensing information by sensing the all-white image and generates second sensing information by sensing the all-black image, a differential image generation section which generates a differential image based on the first and second sensing information, an external light effect removal section, and a projection target area detection section which generates projection target area information on the position of a projection target area corresponding to the screen in the sensing area of the sensor based on the differential image from which the external light effect is removed.

Abstract: An exemplary aspect of the invention can provide a method for easily adjusting the distortion of a projected image. In adjusting the amount of distortion correction, values of the amount of distortion correction for a desired outline form to be formed based on desired positions are calculated after the desired positions can be specified. Then whether all the calculated values of the amount of distortion correction are within a predetermined range where an original image is transformable into a distortion correction image can be judged. If all the calculated values of the amount of distortion correction are within the predetermined range, the calculated values of the amount of distortion correction can be set in an image distortion correction part.