Fig. 1. Luminous intensity distribution of LED

Fig. 2. Sketch map of Fresnel lens

Fig. 3. Sketch map of zoning control

Fig. 4. Collimation optical path of three piece lens group

Fig. 5. Light intensity distribution after collimation

Fig. 6. Lighting light path of LED projection display

Fig. 7. Simulation diagram of illuminance distribution on receiver surface

Fig. 8. Physical test of lighting light path

Fig. 9. Sampling points of brightness uniformity test