Projection display device

A projection display device comprising:

• first, second and third light sources configured to produce red, green and blue primary colors of light;
• first, second and third liquid crystal display panels each of which is configured to be driven by a video signal corresponding to one of the primary colors, receive light from one of the first, second and third light sources which produces light corresponding to the one of the primary colors, and allow transmission and output of video image light modulated by the video signal;
• a projection unit configured to diffusion-project video image light transmitted through the first, second and third display units onto a screen;
• and
• a control unit configured to control the amount of light produced by each of the first, second and third light sources independently so that the luminance level of video image light transmitted through each of the liquid crystal panels is adjusted.

A projection display device comprising:

• first, second and third light sources configured to produce red, green and blue primary colors of light;
• first, second and third liquid crystal display panels each of which is configured to be driven by a video signal corresponding to one of the primary colors, receive light from one of the first, second and third light sources which produces light corresponding to the one of the primary colors, and allow reflection and output of video image light modulated by the video signal;
• a projection unit configured to diffusion-project video image light output from the first, second and third display units onto a screen;
• and
• a control unit configured to control the amount of light produced by each of the first, second and third light sources independently so that the luminance level of video image light output from each of the liquid crystal panels is adjusted.