An optical assembly comprising: a first substrate and a second substrate opposite the first substrate; a dimming structure disposed between the first substrate and the second substrate; and a light shielding structure disposed on a surface of the second substrate away from the first substrate; wherein the light shielding structure forms a solar cell that is configured to absorb at least one of ultraviolet light, near-ultraviolet light, infrared light in the sunlight and output an electrical control signal, the dimming structure comprises: a third transparent electrode on the surface of the first substrate toward the second substrate; a fourth transparent electrode on the surface of the second substrate toward the first substrate; and a polymer dispersed liquid crystal layer between the third transparent electrode and the fourth transparent electrode; characterized in that the dimming structure is configured to adjust light transmittance in response to the electric control signal, the third transparent electrode and the fourth transparent electrode are configured to receive the electrical control signal to control light transmittance of the polymer dispersed liquid crystal layer, the polymer dispersed liquid crystal layer is divided into a plurality of regions, and light transmittance of the polymer dispersed liquid crystal layer in each of the plurality of regions is different while commonly controlled by the same electric control signal; or light transmittance of the polymer dispersed liquid crystal layer in some of the plurality of regions is different from that in other remaining regions while commonly controlled by the same electric control signal; and the profile of each of the plurality of regions has the shape of a logo. a first substrate and a second substrate opposite the first substrate; a dimming structure disposed between the first substrate and the second substrate; and a light shielding structure disposed on a surface of the second substrate away from the first substrate; wherein the light shielding structure forms a solar cell that is configured to absorb at least one of ultraviolet a third transparent electrode on the surface of the first substrate toward the second substrate; a fourth transparent electrode on the surface of the second substrate toward the first substrate; and a polymer dispersed liquid crystal layer between the third transparent electrode and the fourth transparent electrode; characterized in that the dimming structure is configured to adjust light transmittance in response to the electric control signal, the third transparent electrode and the fourth transparent electrode are configured to receive the electrical control signal to control light transmittance of the polymer dispersed liquid crystal layer, the polymer dispersed liquid crystal layer is divided into a plurality of regions, and light transmittance of the polymer dispersed liquid crystal layer in each of the plurality of regions is different while commonly controlled by the same electric control signal; or light transmittance of the polymer dispersed liquid crystal layer in some of the plurality of regions is different from that in other remaining regions while commonly controlled by the same electric control signal; and the profile of each of the plurality of regions has the shape of a logo.