A device for providing an image and illumination, the device comprising: a display panel comprising a first surface configured to display an image, a second surface opposite to the first surface, and a plurality of display pixels disposed between the first surface and the second surface, the plurality of display pixels being configured to be controlled in accordance with information of the image, and; a light source disposed at the second surface of the display panel and configured to emit light to an object toward the display panel; and a light deliverer disposed between the light source and the display panel, and characterized in that: the display panel further includes a transmission window configured to transmit light incident on the second surface through the first surface, and wherein the display panel includes a plurality of non-pixel regions as the transmission window; the plurality of non-pixel regions are pixel-free regions and are configured to transmit the light emitted from the light source; the plurality of display pixels and the plurality of non-pixel regions are alternately provided; the plurality of display pixels are configured to reflect the light emitted from the light source toward the light source; and the light deliverer comprises a plurality of nanostructures having a shape dimension smaller than that of a wavelength of the light emitted from the light source and the plurality of nanostructures are configured to deliver the light emitted from the light source to the object as flood illumination through the transmission window. a display panel comprising a first surface configured to display an image, a second surface opposite to the first surface, and a plurality of display pixels disposed between the first surface and the second surface, the plurality of display pixels being configured to be controlled in accordance with information of the image, and; a light source disposed at the second surface of the display panel and configured to emit light to an object toward the display panel; and a light deliverer disposed between the light source and the display panel, and characterized in that: the display panel further includes a transmission window configured to transmit light incident on the second surface through the first surface, and wherein the display panel includes a plurality of non-pixel regions as the transmission window; the plurality of non-pixel regions are pixel-free regions and are configured to transmit the light emitted from the light source; the plurality of display pixels and the plurality of non-pixel regions are alternately provided; the plurality of display pixels are configured to reflect the light emitted from the light source toward the light source; and the light deliverer comprises a plurality of nanostructures having a shape dimension smaller than that of a wavelength of the light emitted from the light source and the plurality of nanostructures are configured to deliver the light emitted from the light source to the object as flood illumination through the transmission window. the display panel further includes a transmission window configured to transmit light incident on the second surface through the first surface, and wherein the display panel includes a plurality of non-pixel regions as the transmission window; the plurality of non-pixel regions are pixel-free regions and are configured to transmit the light emitted from the light source; the plurality of display pixels and the plurality of non-pixel regions are alternately provided; the plurality of display pixels are configured to reflect the light emitted from the light source toward the light source; and the light deliverer comprises a plurality of nanostructures having a shape dimension smaller than that of a wavelength of the light emitted from the light source and the plurality of nanostructures are configured to deliver the light emitted from the light source to the object as flood illumination through the transmission window.