| 摘要 |
PROBLEM TO BE SOLVED: To provide a projection screen capable of sharply displaying an image by minimizing the influence of phase differences that are produced when light is slantingly incident on a polarized-light selective reflection layer having a cholesteric liquid crystalline structure, and of providing high image visibility. SOLUTION: The projection screen 10includes: a polarized-light selective reflection layer 11 having a cholesteric liquid crystalline structure, capable of selectively reflecting a specific polarized-light component; and a substrate 12 that supports the polarized-light selective reflection layer. The cholesteric liquid crystalline structure of the polarized-light selective reflection layer 11 contains a plurality of helical-structure parts that are different in direction of helical axis, and, owing to structural non-uniformity in the cholesteric liquid crystalline structure, the polarized-light selective reflection layer diffuses light (reflected light 33) that is selectively reflected. In the cholesteric liquid crystalline structure of the polarized-light selective reflection layer 11, the helical pitch on the side farther from the imaging-light-incident side is longer than that on the side closer to the imaging-light-incident side. COPYRIGHT: (C)2005,JPO&NCIPI
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