The invention relates to the technical field of
projection display, and discloses a holographic projection device based on a
micromirror array, and the device comprises a projection imaging
assembly, the projection imaging
assembly comprises a cabinet housing, an air duct
assembly is installed in the cabinet housing, the front surface of the air duct assembly is fixedly communicated with a leveling assembly, the leveling assembly comprises a transverse air
pipe, and the transverse air
pipe is fixedly connected with the cabinet housing. A rotating roller is installed on the inner side of the transverse air
pipe, fan plates are fixedly connected to the two ends of the rotating roller, a pressing plate is installed at the bottom of the rotating roller, the air duct assembly generates air flow and is matched with the leveling assembly to restrain warping of the micromirror
chip substrate, the air flow circulates in the transverse air pipe, the fan plates are transversely arranged, the rotating roller is driven to rotate, and the pressing plate is pushed to move downwards. The micro-mirror
chip is pressed, and the problems that flatness errors and
thermal expansion coefficient differences exist in the base and
chip packaging, and when screws are tightened or the temperature is changed, assembly stress and thermal stress are generated, so that the chip substrate warps, and the holographic
image quality is permanently reduced are solved.