| CPC G02F 1/167 (2013.01) [G02F 1/133606 (2013.01); G02F 1/16755 (2019.01); G02F 1/1676 (2019.01); G02F 1/29 (2013.01); G02F 2001/1678 (2013.01)] | 17 Claims |
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1. A light ray direction control element comprising:
a first light transmitting substrate;
a second light transmitting substrate facing the first light transmitting substrate;
a plurality of first light transmitting regions that is provided on a first main surface of the first light transmitting substrate and that extends from the first light transmitting substrate toward the second light transmitting substrate;
a plurality of second light transmitting regions that is provided on a first main surface of the second light transmitting substrate that faces the first main surface of the first light transmitting substrate, that extends from the second light transmitting substrate toward the first light transmitting substrate, and that is continuous with the first light transmitting regions;
a plurality of first light absorbing regions that extends from the first light transmitting substrate toward the second light transmitting substrate, each of the plurality of first light absorbing regions being positioned between two adjacent first light transmitting regions of the plurality of first light transmitting regions;
a plurality of second light absorbing regions that extends from the second light transmitting substrate toward the first light transmitting substrate, and that is continuous with the plurality of first light absorbing regions, each of the plurality of second light absorbing regions being positioned between two adjacent second light transmitting regions of the plurality of second light transmitting regions;
a light transmitting dispersion medium that is enclosed in the plurality of first light absorbing regions and the plurality of second light absorbing regions; and
charged electrophoretic particles that are dispersed in the light transmitting dispersion medium and that have a dispersion state that changes according to voltage that is applied, wherein
when viewing a cross-section perpendicular to the first main surface of the first light transmitting substrate and the first main surface of the second light transmitting substrate, a shape or an angle of inclination, with respect to the first main surface of the first light transmitting substrate, of the plurality of first light transmitting regions and the plurality of second light transmitting regions differs.
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