there is provided a projector at least comprising : a light source ; a color wheel ; a condensing lens ; a spatial light modulator ; and a projection optical system , wherein the light source includes a red illuminant and a blue illuminant , and the color wheel includes a disc made of optically permeable materials , the disc being composed of a green - light generating portion , a blue - light generating portion and a blue - and - green light generating portion , the green - light generating portion and the blue - and - green light generating portion each including a phosphor layer .