Patent ID: 7206130

Claim:
A projection screen for displaying an image by reflecting imaging light that is projected from an observation side, the projection screen comprising: a projected-image-receiving layer having a function of selectively reflecting a specific polarized-light component and a function of diffusing the specific polarized-light component, wherein the projected-image-receiving layer includes two or more selective reflection layers having the function of selectively reflecting the specific polarized-light component, the two or more selective reflection layers have different reflection wave ranges, and, of the two or more selective reflection layers, the selective reflection layer having a reflection wave range covering a shorter wavelength side is situated apart from the observation side as compared with the selective reflection layer having a reflection wave range covering a longer wavelength side, wherein a value obtained by dividing a thickness of each selective reflection layer in the projected-image-receiving layer by a center wavelength of a reflection wave range thereof, the center wavelength being determined on an assumption that light enters the selective reflection layer vertically to it, fulfills a requirement that this value obtained in terms of the selective reflection layer having a reflection wave range covering the shorter wavelength side is greater than that obtained in terms of the selective reflection layer having a reflection wave range covering the longer wavelength side.