Patent ID: 7488076

Claim:
A projection display device comprising: a storage means for storing a pixel value and a depth value for each of a plurality of pixels constituting a display image; an acquiring means for acquiring the pixel value and the depth value for each of a plurality of pixels stored in the storage means; a light output means for sequentially outputting light per pixel according to the pixel value; a reflecting member for reflecting the light sequentially output per pixel from the light output means; a light guide body that has a light reflecting surface for repeatedly reflecting light reflected by the reflecting member, and guides the light to a position corresponding to the pixel on a projection surface; and a control means for changing an angle at which the light reflected by the reflecting member is incident on the light guide body by driving the reflecting member according to the depth value of the pixel, so as to change a light path length to the projection surface determined depending on the number of times of the repeated reflections according to the depth value of each pixel.