A display device, comprising a display array generation device and a first lens layer, wherein the display array generation device is configured to provide a plurality of collimated light beams parallel to each other and spaced from each other; the first lens layer is arranged at a light exiting side of the display array generation device, includes a plurality of first microlenses arranged in array, and is configured to receive the plurality of collimated light beams; and the plurality of collimated light beams correspond to the plurality of first microlenses, to achieve a plurality of scanning imaging, respectively the display array generation device includes a beam splitting element, the beam splitting element being configured to divide an incident single beam into the plurality of collimated light beams, and being configured to wholly translate emergent sites of the plurality of collimated light beams based on an incident site of the single beam; characterized in that the display array generation device is further configured such that, within the time of displaying a frame of image, the amount of the positions where each collimated light beam of the plurality of collimated light beams is incident on a corresponding first microlens and the amount of angles of light beams emitted by the corresponding first microlenses are both equal to the amount of pixels of the image displayed by the display device; the display array generation device further includes a second lens layer including a plurality of second microlenses arranged in array, the second microlenses are opposite to the incident side surface, and are configured to receive light beams with different incident angles at different times, and are configured so that the light beams with different incident angles are incident on the beam splitting element at the same angle on the incident side; the display array generation device further includes a collimated light source and angle-adjustable mirrors, the collimated light source is configured to provide the collimated light beams, the angle-adjustable mirrors are configured such that the collimated light beams are incident on different positions of the plurality of second microlenses at different angles at different times; and the plurality of second lenses in array are arranged between the angle-adjustable mirrors and the plurality of first microlenses in array. the display array generation device is configured to provide a plurality of collimated light beams parallel to each other and spaced from each other; the first lens layer is arranged at a light exiting side of the display array generation device, includes a plurality of first microlenses arranged in array, and is configured to receive the plurality of collimated light beams; and the plurality of collimated light beams correspond to the plurality of first microlenses, to achieve a plurality of scanning imaging, respectively the display array generation device includes a beam splitting element, the beam splitting element being configured to divide an incident single beam into the plurality of collimated light beams, and being configured to wholly translate emergent sites of the plurality of collimated light beams based on an incident site of the single beam; characterized in that the display array generation device is further configured such that, within the time of displaying a frame of image, the amount of the positions where each collimated light beam of the plurality of collimated light beams is incident on a corresponding first microlens and the amount of angles of light beams emitted by the corresponding first microlenses are both equal to the amount of pixels of the image displayed by the display device; the display array generation device further includes a second lens layer including a plurality of second microlenses arranged in array, the second microlenses are opposite to the incident side surface, and are configured to receive light beams with different incident angles at different times, and are configured so that the light beams with different incident angles are incident on the beam splitting element at the same angle on the incident side; the display array generation device further includes a collimated light source and angle-adjustable mirrors, the collimated light source is configured to provide the collimated light beams, the angle-adjustable mirrors are configured such that the collimated light beams are incident on different positions of the plurality of second microlenses at different angles at different times; and the plurality of second lenses in array are arranged between the angle-adjustable mirrors and the plurality of first microlenses in array.