Display panel and projection device

The utility model discloses a display panel and a projection device. The display panel comprises an array substrate, an opposite substrate and a liquid crystal layer between the array substrate and the opposite substrate. The array substrate comprises a first substrate and a switch unit, the switch unit comprises a gate electrode, an active layer, a first electrode and a second electrode, the active layer is located on the side, away from the first substrate, of the gate electrode, the first electrode and the second electrode are connected with the active layer, and the active layer comprises a channel region; the opposite substrate comprises a second substrate and a second structural layer arranged towards the array substrate; the display panel comprises at least one of a first reflecting layer and a second reflecting layer; the first reflecting layer is located on the side, away from the opposite substrate, of the first substrate, the second reflecting layer is located on the side, away from the array substrate, of the second substrate, and the first reflecting layer and the second reflecting layer are arranged to reflect light emitted to the display panel; the orthographic projection of the channel region on the first substrate is located in the orthographic projection range of the first reflecting layer; and the orthographic projection of the channel region on the second substrate is located in the orthographic projection range of the second reflecting layer.