Patent ID: 7116379

Claim:
A projector that is capable of electronically adjusting a projection size of an image, said projector comprising: an image display device that creates an image in response to a display image signal supplied thereto; an image signal processing module that generates the display image signal, which is to be supplied to said image display device, from an input image signal supplied from an image supply device; and a projection module that projects the image created by said image display device, wherein said image processing module adjustably sets an image area on a center of an image display area of said image display device for displaying an image expressed by the input image signal and a mask display area surrounding the image area for displaying an image of a specific color, based on a user's setting of a parameter representing a projection size, said image processing module contracting or expanding the image expressed by the input image signal by a projection factor that can be continuously set to make a size of the image expressed by the input image signal fit a size of the image area in the process of generating the display image signal from the input image signal, while generating the display image signal to make the image of the specific color displayed in the mask display area, wherein said image processing module, when the size of the image expressed by the input image signal is different from a size of the image display area, expands or contracts the image expressed by the input image signal to make the size of the image expressed by the input image signal fit the size of the image display area to generate a resolution converted image signal, said image processing module subsequently contracting an image expressed by the resolution converted image signal to make a size of the image expressed by the resolution converted image signal fit the size of the image area.