Route guidance device and route guidance system based on augmented reality and mixed reality

A route guidance system comprising:

• a route guidance device mounted on a vehicle configured to display an AR view image comprising augmented reality (AR) information rendered based on received point of interest (POI) information or a reality-based virtual view image comprising MR information rendered based on three-dimensional map information on a display of the vehicle;
• and
• a cloud server that provides POI information or three-dimensional map information corresponding to a current, past or expected future location of the vehicle to the route guidance device according to a request of the route guidance device,
• wherein the route guidance device switches a view image displayed on the display to either one of the AR view image and the reality-based virtual view image based on sensing information sensed from at least one sensor provided in the vehicle, and
• the reality-based virtual view image includes an image rendered with virtual objects equal to objects in an area corresponding to an area displayed through the AR view image,
• wherein the route guidance device is further configured to:
• detect a view image that matches a current driving situation of the vehicle based on the sensing information while the AR view image is displayed,
• determine whether driving guidance using the AR view image is possible based on the detected view image, and
• based on a determination that the driving guidance using the AR view image is not possible, switch the view image displayed on the vehicle display to the virtual view image that reflects the current driving situation of the vehicle.