| 摘要 |
<P>PROBLEM TO BE SOLVED: To suppress optical unevenness of irradiated light which transmits a liquid crystal lens while suppressing manufacturing costs in an illuminating device which distributes light using the liquid crystal lens. <P>SOLUTION: The illuminating device 1 has: piled liquid crystal lenses 4a, 4b, wherein each of the liquid crystal lenses 4a, 4b sandwiches a liquid crystal layer 43 and has a plurality of transparent belt-like electrodes 46 formed in the similar shape when viewed from the light irradiating direction. The respective belt-like electrodes 46 of the liquid crystal lens 4a provided in front when viewed from the light irradiating direction are alternately arranged so as to cover the boundary between the respective belt-like electrodes 46 of the liquid crystal lens 4b behind them. Thus, orientations of an optical path of transmitted light are adjusted by every overlapped part of the respective belt-like electrodes 46, and consequently, it can be considered as false fine structure as in the case of arranging the belt-like electrodes 46 whose width is narrowed down at each part of them. Thus, the optical unevenness of the irradiated light according to electrode patterns of the belt-like electrodes 46 is suppressed, and in addition, since it is not necessary to actually make the belt-like electrodes 46 into fine structure for suppressing the optical unevenness, the manufacturing costs are suppressed. <P>COPYRIGHT: (C)2011,JPO&INPIT |
