PROJECTION TYPE DISPLAY DEVICE, CONTROL METHOD OF PROJECTION TYPE DISPLAY DEVICE, CONTROL PROGRAM OF PROJECTION TYPE DISPLAY DEVICE

Provided are a projection type display device, a control method of a projection type display device, and a control program of a projection type display device, capable of being continuously used even in a case where a vehicle vibrates, and performing optimal display depending on the vibration. An HUD includes a projection display section that projects image light obtained by spatially modulating light emitted from a light source onto a combiner to display a virtual image, a first vibration detector that detects a first vibration of the combiner , a second vibration detector that detects a second vibration of the projection display section , a third vibration detector that detects a third vibration of the projection display section with respect to the combiner on the basis of the first vibration and the second vibration, and a display controller that controls the image to be displayed by the projection display section . The display controller changes a display format of content to be displayed by the projection display section on the basis of the third vibration.