A light path control device can include a first substrate, a first electrode disposed on the first substrate, a second substrate disposed on the first substrate, a second electrode disposed below the second substrate, a light conversion layer disposed between the first electrode and the second electrode and including a barrier part and a receptacle part arranged alternately therein, an adhesive layer disposed between the first electrode and the light conversion layer, and an insulation thin film disposed between the bather part and the adhesive layer.