US Patent 11167689 Projection apparatus and control method

The invention provides a projection apparatus configured to be disposed on a vehicle door, and a control method of the projection apparatus. The projection apparatus includes an illumination source, a projection display apparatus and a controller. The illumination source is configured to provide an illumination beam. The projection display apparatus is disposed on a transmission path of the illumination beam, and is configured to convert the illumination beam into a projection beam. The controller is coupled to the projection display apparatus. The controller determines whether the vehicle door is a first vehicle door or a second vehicle door according to an opening operation of the vehicle door, and correspondingly causes the projection beam to display an image.