Method of realizing touch for head-up display

A head up display method for a motor vehicle, the method comprising:

• emitting a light field that is reflected off of a windshield of the motor vehicle and that is visible to a human driver of the motor vehicle as a virtual image disposed outside of the windshield, the virtual image including a plurality of graphical elements;
• detecting a position of a hand of the human driver in space;
• and
• determining which one of the graphical elements in the virtual image is aligned with an eye location of the human driver and the detected position of the hand of the human driver in space.

A head up display system for a motor vehicle, the system comprising:

• a light field emitter configured to emit a light field that is reflected off of a windshield of the motor vehicle and that is visible to a human driver of the motor vehicle as a virtual image disposed outside of the windshield, the virtual image including a plurality of graphical elements;
• a hand sensor configured to detect a position of a hand of the human driver in space;
• an eye sensor configured to detect a position of an eye of the human driver in space;
• and
• an electronic processor communicatively coupled to the light field emitter, the hand sensor and the eye sensor, the electronic processor being configured to:
• receive a first signal from the hand sensor indicative of the position of a hand of the human driver in space;
• receive a second signal from the eye sensor indicative of the position of an eye of the human driver in space;
• and
• determine which one of the graphical elements in the virtual image is aligned with the detected position of the eye of the human driver and the detected position of the hand of the human driver in space.