1. A display apparatus to estimate a depth, the apparatus comprising: a display panel comprising a plurality of apertures configured to receive and transmit light input from an object; a pass filter configured to extract infrared components from light passing through the plurality of apertures; a sensor panel configured to generate image data of the object by detecting the extracted infrared components; and a processor configured to generate a refocused image, based on a disparity associated with a plurality of image acquiring areas on the sensor panel, and configured to calculate a depth from the object to the display panel, by using the refocused image.