Abstract: When white light emitted by a lamp is projected onto a screen, a color detection sensor receives light reflected by the screen, and detects in the reflected light color levels for red, green and blue. A microcomputer calculates correction values so that the balance of the detected color levels of the reflected light match the balance of the predesignated color levels for the red, green and blue in the ideal white that are stored in a flash memory. Thereafter, upon receiving a video signal from an input terminal, the color detection unit employs the correction values obtained by the microcomputer to correct the color levels of the video signal, and displays an image on the screen.

Abstract: When white light emitted by a lamp is projected onto a screen, a color detection sensor receives light reflected by the screen, and detects in the reflected light color levels for red, green and blue. A microcomputer calculates correction values so that the balance of the detected color levels of the reflected light match the balance of the predesignated color levels for the red, green and blue in the ideal white that are stored in a flash memory. Thereafter, upon receiving a video signal from an input terminal, the color detection unit employs the correction values obtained by the microcomputer to correct the color levels of the video signal, and displays an image on the screen.