| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a projection type display device that accurately detects luminance change and hue change on a screen surface without interfering with a display video. <P>SOLUTION: The projection type display device includes light sources 10 and 30, a DMD chip 20 for modulating radiated light according to an input signal, an illumination optical system for radiating light from the light sources 10 and 30 to the DMD chip 20, a projection lens 21 for projecting light modulated by the DMD chip 20 to the screen 22, and an optical sensor 24 arranged on an optical path of branched light branched from a main optical path from the light sources 10 and 30 to the screen 22 at a position near an optically conjugate position of the screen surface of the screen 22. <P>COPYRIGHT: (C)2012,JPO&INPIT |
