Alert display device and alert display method

An alert display method which displays a display image for highlighting an object to be alerted in an actual scene in front of a driver of a vehicle or around the vehicle in a superimposing manner, the method comprising:

• a detection step of detecting the object to be alerted in front of the vehicle or around the vehicle and detecting a position of the object to be alerted;
• a control step of performing display control for positioning the display image conforming to the position of the object to be alerted detected in the detection step;
• and
• a display step of displaying the display image for highlighting the object to be alerted detected in the detection step in the actual scene in front of the driver of the vehicle or around the vehicle in the superimposing manner based on the display control in the control step,
• wherein, in the control step, a size of the display image is adjusted based on an error range of a detection unit according to the position of the object to be alerted detected in the detection step and/or a range in which the eyes of the driver are likely to be present.

An alert display device for displaying a display image on a display such that the display image highlights an object to be alerted, the alert display device comprising:

• an external sensor outputting an external information signal;
• the display;
• and
• a processor and a non-transitory memory module, wherein the non-transitory memory module comprises a set of machine readable instructions that, when executed by the processor:
• detect the object to be alerted based on the external information signal;
• determine a position of the object to be alerted;
• determine an error range of the external sensor based on the position of the object to be alerted;
• determine a size of the display image based on the error range of the external sensor;
• and
• display the display image on the display such that the display image highlights the object to be alerted.