Patent ID: 7237901

Claim:
A projection type image display device comprising: a polarization converter for making uniform a polarization direction of light emitted from a light source and outputting the light as a predetermined polarized light; a separator for separating said polarized light into red light, green light, and blue light; an image display element to which polarized light of each said separated color light is radiated and which modulates the polarized light in accordance with a video signal; a color synthesizer for color-synthesizing the polarized light of red light, that of green light, and that of blue light after modulation by the image display element; and a projection lens unit for projecting on a larger scale an optical image of the color-synthesized polarized light; wherein said color synthesizer has an optical characteristic such that the transmittance or quantity of the polarized light of blue light outputted, out of the incident polarized light of red light, that of green light, and that of blue light, is made larger than that of the polarized light of red light or that of green light.