A display apparatus comprising: a display panel including a plurality of subpixels (101, 102, 103), each subpixel (101, 102, 103) including a first region (1010, 1020, 1030) for displaying a subpixel image; a plurality of pixel adjustors each of which is configured to adjust the first region (1010, 1020, 1030) of a corresponding one of the plurality of subpixels (101, 102, 103) to display an initial subpixel image; and a plurality of optical elements at a first side of the display panel, each of the plurality of optical elements being associated with at least one subpixel (101, 102, 103) to generate a virtual subpixel image (201, 202, 203) at a second side (A') of the display panel corresponding to the initial subpixel image displayed by the at least one subpixel (101, 102, 103); wherein at least two virtual subpixel images (201, 202, 203) are at different distances relative to the display panel; the second side (A') is opposite to the first side; in a case where the display panel is of a passive type, each of the pixel adjustors comprises a convex lens structure to gather light to a smaller area for facilitating the adjustment of the first region (1010, 1020, 1030) by reducing an illuminated area; and each of the optical elements comprises a convex lens structure, some convex lens structures of some of the optical elements having different focal lengths for generating respective virtual subpixel images (201, 202, 203) having different distances relative to the display panel, the same distance of each optical element relative to the display panel being smaller than the focal length of the convex lens structure of the optical element; or in a case where the display panel is of an active type comprising an organic light-emitting layer, each of the plurality of pixel adjustors comprises an aperture structure disposed between a corresponding subpixel (101, 102, 103) and a corresponding optical element at the first side of the display panel; and each of the plurality of pixel adjustors comprises Micro-Electro-Mechanical Systems (MEMS) controlled microlens for independently adjusting the aperture structure to adjust the first region (1010, 1020, 1030) of the corresponding subpixel (101, 102, 103) for displaying the initial subpixel image; and the corresponding optical element is configured to enlarge the initial subpixel image to generate a virtual subpixel image (201, 202, 203) having an area up to a total displayable region of the subpixel (101, 102, 103) and independently control a distance of the virtual subpixel image (201, 202, 203) at the second side (A') relative to the display panel. a display panel including a plurality of subpixels (101, 102, 103), each subpixel (101, 102, 103) including a first region (1010, 1020, 1030) for displaying a subpixel image; a plurality of pixel adjustors each of which is configured to adjust the first region (1010, 1020, 1030) of a corresponding one of the plurality of subpixels (101, 102, 103) to display an initial subpixel image; and a plurality of optical elements at a first side of the display panel, each of the plurality of optical elements being associated with at least one subpixel (101, 102, 103) to generate a virtual subpixel image (201, 202, 203) at a second side (A') of the display panel corresponding to the initial subpixel image displayed by the at least one subpixel (101, 102, 103); wherein at least two virtual subpixel images (201, 202, 203) are at different distances relative to the display panel; the second side (A') is opposite to the first side; in a case where the display panel is of a passive type, each of the pixel adjustors comprises a convex lens structure to gather light to a smaller area for facilitating the adjustment of the first region (1010, 1020, 1030) by reducing an illuminated area; and each of the optical elements comprises a convex lens structure, some convex lens structures of some of the optical elements having different focal lengths for generating respective virtual subpixel images (201, 202, 203) having different distances relative to the display panel, the same distance of each optical element relative to the display panel being smaller than the focal length of the convex lens structure of the optical element; or in a case where the display panel is of an active type comprising an organic light-emitting layer, each of the plurality of pixel adjustors comprises an aperture structure disposed between a corresponding subpixel (101, 102, 103) and a corresponding optical element at the first side of the display panel; and each of the plurality of pixel adjustors comprises Micro-Electro-Mechanical Systems (MEMS) controlled microlens for independently adjusting the aperture structure to adjust the first region (1010, 1020, 1030) of the corresponding subpixel (101, 102, 103) for displaying the initial subpixel image; and the corresponding optical element is configured to enlarge the initial subpixel image to generate a virtual subpixel image (201, 202, 203) having an area up to a total displayable region of the subpixel (101, 102, 103) and independently control a distance of the virtual subpixel image (201, 202, 203) at the second side (A') relative to the display panel.