The
optical path control member according to the embodiment includes a lower substrate, a lower
electrode provided on an upper surface of the lower substrate, an upper substrate provided on the lower substrate, an upper
electrode provided on a lower surface of the upper substrate, an optical conversion unit provided between the lower
electrode and the upper electrode, and an
adhesive layer provided between the optical conversion unit and the upper electrode, wherein the optical conversion unit includes a partition wall portion and a housing portion alternately provided, the housing portion has a light
transmittance that varies according to application of a
voltage, and when a ratio of a thickness of the housing portion to a
dielectric constant thereof (thickness /
dielectric constant) is defined as A and a ratio of a thickness of the
adhesive layer to a
dielectric constant thereof (thickness / dielectric constant) is defined as B, a value of A is greater than a value of B.