Image display device and operating method for thereof

A comparison unit for an image display apparatus according to the present invention may obtain the information about the set output image mode, compare mode information to obtain the information about the received image input mode and the data mode and the content; If the comparing portion compares a result, the output image mode and the image mode of the input video, and data content the same, and the adjustment section to reduce or enlarge the output form of the input video, and data content mode based on the aspect ratio included in the output image mode .; By control of the adjustment element, and the OSD processing unit to process the output of the received data content; The image display processing unit for under the control of the adjustment unit, the output of the received input image; And a data and a content processed by the OSD processing unit, a display screen that the input image processed by the image display processor output. Further, the operating method of the image display apparatus according to the invention, the method comprising: obtaining information on the set output image mode; Acquiring mode information on the received input image data, and content and; Comparing the mode information for the set mode and the output image, the input image data, and content and; If the step of the set mode, the output image and the input image data, and content mode, the same, to reduce or enlarge the output form of the input video, and data content mode based on the aspect ratio included in the output image mode; And the output step of outputting the shape is to reduce or enlarge the input image data and the contents in the screen display; It includes.