HEAD-UP DISPLAY SYSTEM, HEAD-UP DISPLAY DEVICE, AND NAVIGATION INFORMATION DISPLAY METHOD

The present invention provides a head-up display system including a head-up display device 10 which visually displays information, and a smart phone 30 which provides navigation information for assisting wayfinding through map guidance. The head-up display device 10 includes: a communication unit 12 which establishes a communication connection by requesting a communication connection to a communication unit 32 of the smart phone 30 when power is applied to the head-up display device; a display unit 11 which visually displays navigation information received through the communication unit 12; and a control unit 13 which controls the communication unit 12 and the display unit 11. The smart phone 30 includes: a communication unit 32 which establishes a communication connection in response to the communication connection request from the communication unit 12; a navigation module 31 which generates navigation information; and a control unit 33 which controls the communication unit 32 and the navigation module 31.