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

Provided are a projection type display device, a display control method thereof, and a display control program thereof capable of preventing missing of warning information even in a case where display of warning information using a virtual image and display of warning information using a real image are switched. During a low speed run, warning information A is displayed on a windshield using a real image Ir, and guidance information G is displayed in front of the windshield using a virtual image Iv. During a high speed run, warning information A is displayed in front of the windshield using the virtual image Iv, and guidance information G is displayed on the windshield using the real image Ir.