Display device and operating method thereof

A method of controlling a display device, the method comprising:

• obtaining, via a camera of the display device, a user's image;
• recognizing, via a controller of the display device, a user's hand gesture from the obtained user's image;
• and
• if the recognized user's hand gesture does not match a pre-stored gesture, displaying, via a display of the display device, a function guide including different hand gestures different than the recognized user's hand gesture for guiding a user's selection for performing a function of the display device,
• wherein the different hand gestures include a plurality of similar hand gestures representing a gesture pattern similar to the recognized user's hand gesture,
• wherein the function guide comprises:
• an image of the recognized user's hand gesture;
• and
• a plurality of images of the different hand gestures,
• wherein the images of the different hand gestures are disposed around the image of the recognized user's hand gesture,
• wherein the method further comprises:
• recognizing, by using the obtained user's image, that the user's hand is moved toward a direction where one image corresponding to a different hand gesture among the plurality of images of the different hand gestures is disposed,
• selecting the image of a different hand gesture corresponding to the direction based on a recognition result, and
• performing a function of the display device corresponding to the selected image of the different hand gesture, and
• wherein the function of the display device represents a function related to an edition or a play of a media content.