Dense-viewpoint three-dimensional display system with discretely—arranged eyeboxes and display method thereof

A dense-viewpoint three-dimensional display system comprising:

• a display screen comprising a plurality of display cells for projecting light to two pupils of a viewer, wherein all the display cells are divided into multiple display-cell blocks along at least one direction;
• wherein, each of the display cells is a smallest surface structure which is capable of emitting light independently;
• an eyebox-generating device comprising a plurality of light-guiding elements arranged along at least one direction, wherein each of the light-guiding elements is used for guiding beams or reverse extension lines of the beams from Nb corresponding display-cell blocks to Nb relay-eyeboxes in a one-to-one manner, Nb is an integer and Nb≥2;
• wherein, for any one of the light-guiding elements, the Nb display-cell blocks corresponding to the light-guiding element are spaced by n×Nb display-cell blocks along at least one direction, n is an integer and n≥0;
• a projecting unit capable of imaging said Nb relay-eyeboxes to Nb active-eyeboxes, respectively;
• a control unit capable of refreshing each of the display cells with projection information of a to-be-displayed scene along a projecting path corresponding to one of the display cells;
• wherein, the projecting path corresponding to the one of the display cells is the propagation path of the beam which comes from one of the display cells and incidents into corresponding relay-eyebox, or corresponding active-eyebox, and the different display cells correspond to the different projecting paths;
• a tracking unit capable of detecting positions of the viewer's pupils under control of said control unit;
• wherein, said dense-viewpoint three-dimensional display system is configured such that, along at least one direction, the beams from display-cell blocks spaced by (Nb−1) display-cell blocks are guided to a same relay-eyebox at a time-point;
• and, for a displayed point, one of the two pupils of the viewer in the relay-eyebox or the active-eyebox can perceive more than one beams passing through the displayed point when all the display cells are activated.