Image projection apparatus and adjusting method used for the same

An image projection apparatus comprising:

• first to third reflection type liquid crystal display devices for selectively providing light incident upon a pixel within an effective area with a phase difference based on an input image signal, and for providing light incident upon an area outside the effective area with a predetermined phase difference irrespective of the image signal, the first reflection type liquid crystal display device being used for red light, the second reflection type liquid crystal display device being used for green light, and the third reflection type liquid crystal display device being used for blue light;
• an illumination optical system for separating a color of light from a light source into the red light, the green light and the blue light, and for illuminating each of the first to third reflection type liquid crystal display devices with a corresponding one of the red light, the green light and the blue light;
• and
• a projection optical system for synthesizing and projecting optical paths from the first to third reflection type liquid crystal display devices,
• wherein where each of first, second and third leakage light ratios is defined as a ratio of light reflected on the area outside the effective area of a corresponding one of said first, second and third reflection type liquid crystal display devices and projected by said projection optical system, to light incident upon the area outside the effective area of the corresponding one of said first, second and third reflection type liquid crystal display devices, the third leakage light ratio is greater than each of the first and second leakage light ratios.

An image projection apparatus comprising:

• first to third reflection type liquid crystal display devices for selective providing light incident upon a pixel in an effective area with a phase difference based on an input image signal, and for providing light incident upon is an area outside the effective area with a predetermined phase difference irrespective of the image signal, the first reflection type liquid crystal display device being used for red light, the second reflection type liquid crystal display device being used for green light, and the third reflection type liquid crystal display device being used for blue light;
• an illumination optical system for separating a color of light from a light source into the red light, the green light and the blue light, and for illuminating each of the first to third reflection type liquid crystal display devices with a corresponding one of the red light, the green light and the blue light;
• and
• a projection optical system for synthesizing and projecting optical paths from the first to third reflection type liquid crystal display devices,
• wherein on a surface on which said projection optical system projects an image, chromaticity corresponding to the area outside the effective area has an x coordinate that is 0.3 or smaller on an xy chromaticity coordinate system.