Head mounted display device and method of driving the same

A method of driving a head mounted display device including a lens, a first display region, and a second display region arranged at a first angle with respect to the first display region, the first and second display regions have different optical path lengths to the lens, the method comprising:

• extracting objects from input image data;
• calculating a difference between locations of first objects which corresponds each other among the objects;
• determining a depth of the first objects based on the difference;
• generating first sub data and second sub data by dividing the input image data based on the depth of the first objects;
• and
• displaying a first sub image corresponding to the first sub data using the first display region and a second sub image corresponding to the second sub data using the second display region, respectively.