Fig. 1. Development history of Micro-LED

Fig. 2. （a）Schematic illustration of the process of a single GaN-based top-emission Micro-LED；（b）Schematic illustration of the passive addressing Micro-LED array；（c）Schematic illustration of the active addressing Micro-LED array.

Fig. 3. Monolithic integration manufacture

Fig. 4. （a）Cross-sectional schematic of flip-flop bonding of a Si CMOS IC to a Micro-LED array using indium bumps；（b）Adhesive bonding；（c）Display micro-tube bonding.

Fig. 5. Schematic diagram of laser-induced forward transfer

Fig. 6. Micro-LED display panchromatic luminescence based on quantum dots

Fig. 7. （a）Vergence-acommodation conflict schematic；（b）Schematic diagram of vergence distance and accommodation under normal conditions.

Fig. 8. Feld of view of the human eye

Fig. 9. Reality-virtuality spectrum

Fig. 10. Different types of AR optical combiners

Fig. 11. 3D see-through AR display system

Fig. 12. Schematic of（a）the geometric waveguide with transflective mirror array，（b）the diffractive waveguide with surface relief gratings，（c）the diffractive waveguide with volumetric holographic gratings.

Fig. 13. （a）Transparent display stack；（b）Stacking of beam splitters in stacking of optical combinators；（c）Polarization-multiplexed multi-focal-plane display；（d）Wavelength-multiplexed multi-focal-plane display.