The circularly polarized light amount abscission layer and the optical component, while being the based formation where difference

摘要

PROBLEM TO BE SOLVED: To reduce aslant transmitted elliptically polarized light, without damaging a transmitted circularly polarized light characteristic of vertically incident light contributing to the front brightness, and convert the elliptically polarized light into light capable of contributing to increase in the front brightness by arranging a medium for varying a polarized light state between base layers consisting of a cholesteric liquid crystal layer, in which the difference in the center wave length of reflecting light is within a specified value. ;SOLUTION: As base layers 11, 13 consisting of a cholesteric liquid crystal layer, a cholesteric liquid crystal layer in which difference in the center wave length of reflecting light is within 20 nm is used. Media 12, 14 for varying a polarized light state are arranged between the base layers 11, 13, and superimposed. Thereby, part of light transmitted aslant through one base layer is totally reflected through the other base layer. The cholesteric liquid crystal layer, especially the cholesteric liquid crystal layer in which the center wave length of reflecting light differs 80 nm or more from that of at least one base layer is suitable.;COPYRIGHT: (C)1998,JPO