METHOD FOR OPERATING A DISPLAY DEVICE AND SYSTEM FOR DISPLAYING ACTUAL IMAGE CONTENTS OF AN ACTUAL ENVIRONMENT OVERLAYED WITH VIRTUAL IMAGE CONTENTS

The invention relates to a method and system for operating a display device (20) having a display element (21) arranged in the field of vision (2) of the user (22) for displaying virtual image contents (10), displayed overlaying actual image contents (11), comprising the following method steps: determining a position (14) and a viewing direction (15) of the user (22) in an actual environment (1); positioning at least one virtual object (19) in an object position (16) of a computer-generated simulation environment (13) that depicts the actual environment (1) in a geo-referenced, in particular geo-specific manner; determining a virtual position (14.2) and viewing direction (15.2) by transferring the determined position (14) and viewing direction (15) into the simulation environment (13); calculating a virtual image content (10) as a portion of the virtual object (19) in simulation environment (13) that is visible from the virtual position (14.2) and in the virtual viewing direction (15.2); calculating an overlay position (18) of the virtual image content (10) on the display element (21) based on the object position (16) and the virtual position (14.2) and viewing direction (15.2); displaying at least one virtual image content (10) on the display element (21).