Patent ID: 8451390

Claim:
A projection stereoscopic display comprising: a light source operable to emit linearly polarized light; and a stereoscopic display optical system operable to receive linearly polarized light from the light source and display a first picture and a second picture both having binocular parallax by linearly polarized light with polarization directions orthogonal to each other, wherein, the stereoscopic display optical system includes (1) a reflective liquid crystal panel operable to modulate and reflect linearly polarized light from the light source in response to a picture signal, (2) a first polarizing device operable to split the first picture from reflected light from the reflective liquid crystal panel, (3) a retardation device operable to convert the polarization direction of the first picture into a direction orthogonal thereto, and (4) a second polarizing device operable to split the second picture from the reflected light from the reflective liquid crystal panel, and superimpose the second picture on the first picture of which the polarization direction is converted by the retardation device, the reflective liquid crystal panel includes a first reflective liquid crystal panel corresponding to the first polarizing device and a second reflective liquid crystal panel corresponding to the second polarizing device, and a space between the second polarizing device and the second reflective liquid crystal panel is larger than a space between the first polarizing device and the first reflective liquid crystal panel, and the optical path lengths of the first picture and the second picture are equal to each other.