US Patent 10021793 Head-up display and operation of opening cover thereof

A head-up display includes a transmission mechanism, a first cover, a second cover and a driver. The first cover is connected to the transmission mechanism and slidable with respect to the transmission mechanism. The second cover is separably connected to the first cover. The driver is configured to drive the transmission mechanism to operate. Wherein during a first state to a second state of the head-up display, the first cover and the second cover are connected to each other and move together in an opening direction; during the second state to a third state of the head-up display, the first cover is separated from the second cover.