Projection display device and vehicle

A vehicle, comprising:

• a vehicle window, at least part of which is a projection display device;
• and
• a projection light source configured to provide a projection image toward the inner light-transmitting layer of the projection display device;
• wherein two opposite sides of the projection display device are a first side and a second side respectively, and the projection display device comprises an inner light-transmitting layer, a display layer and an outer light-transmitting layer which are sequentially stacked in a direction from the first side toward the second side;
• the display layer is configured to display a projection image received from a projection light source;
• the inner light-transmitting layer is configured to allow the projection image displayed on the display layer to be displayed toward the first side;
• and
• the outer light-transmitting layer is configured to restrict the projection image displayed on the display layer from being displayed toward the second side.