| 摘要 |
A projection display apparatus includes a polarization beam splitter, a first phase compensation plate including two layers, and a light modulator. Each layer has a constant axial angle, and an optical axis of each layer inclines with respect to the x axis in an xz plane. The axial angle of the layer closer to the polarization beam splitter among the two layers is larger than the axial angle of the layer farther from the polarization beam splitter. 20°≦̸&thetas;max−&thetas;min≦̸80° is satisfied where &thetas;max is a maximum value of the axial angle and &thetas;min is a minimum value of the axial angle. 40°≦̸&thetas;ave≦̸70° is satisfied where &thetas;ave is an average value of axial angles of the two layers. |
