Fig. 1. Classification of 3D display technology

Fig. 2. 4D flow chart of light field function^[11]and concept of light field display

Fig. 3. Domestic research on light field displays

Fig. 4. Foreign research on light field displays

Fig. 5. Concept of integral imaging and optical reproduction of the sampled light rays using a pinhole array

Fig. 6. Research on integral imaging light field display at domestic universities

Fig. 7. Flat light field scanning screen

Fig. 8. Early flat light field scanning screen system

Fig. 9. Research on the scanning light field display by Zhejiang University

Fig. 10. Foreign research on multi-projector-type light field displays

Fig. 11. Domestic research on light field display

Fig. 12. Display made of multilayer light field

Fig. 13. Display made by Suzhou University based on vector light field display

Fig. 14. Research on near-eye display in Beijing University of Technology

Fig. 15. Research on the display of floating light field in Beijing University of Posts and Telecommunications^[80]