Head-up display apparatus

A head-up display apparatus for a vehicle, comprising:

• a lower case disposed at a lower portion of the head-up display apparatus;
• a screen coupled to the lower case and including a light path formed therein;
• a picture generator including a liquid crystal layer;
• a processor configured to control the liquid crystal layer to selectively transmit light, based on a magnitude of voltage applied to the liquid crystal layer,
• an aspherical mirror configured to reflect an image including driving information of the vehicle generated by the picture generator to be displayed on a windshield of the vehicle,
• wherein the head-up display is configured to accommodate a folding mirror disposed in the light path for modification of the head-up display to a two-mirror type head-up display,
• wherein, in case the head-up-display apparatus is configured to include one mirror, the picture generator is coupled to the side wall of the lower case, and
• wherein, in case the head-up-display apparatus is configured to include at least two mirrors, the picture generator is coupled to the bottom portion of the lower case.