| 摘要 |
<p>The present invention relates to the field of projection type video image display devices allowing color adjustment and a method for such a color adjustment. The device comprises a light source ( 1 ) for emitting a white light luminous flux; color light-separating means ( 2 a, 2 b) for separating the white light into three color lights of red, blue and green light; light valves ( 3 R, 3 G, 3 B) for modulating lights contained in luminous fluxes from said color light-separating means ( 2 a, 2 b), and producing a video image; color light-combining means ( 4 ) for combining the modulated luminous fluxes, and projection optical means ( 5 ) for projecting a combined luminous flux on a screen. At least one dichroic filter ( 10, 10 a, 10 b, 10 c) having characteristics for selectively passing and selectively reflecting any one of the red, blue or green light is arranged at least partially insertable into and retrievable from the optical path of said white light luminous flux, providing means for adjusting the color of the combined luminous flux.</p> |
