Image shifting module and optical projection device

An optical projection device, comprising:

• an illumination system for providing a light beam;
• a reflective light valve disposed on a transmission path of the light beam, wherein the reflective light valve converts the light beam into a plurality of sub-images in each frame time;
• a projection lens disposed on the transmission path of the sub-images, the reflective light valve being disposed between the illumination system and the projection lens;
• and
• an image shifting module disposed on the transmission path of the sub-images and between the reflective light valve and the projection lens, wherein the image shifting module shifts an imaging position of each of the sub-images in each frame time, the image shifting module comprising:
• a first vibration mechanism disposed on a transmission path of the sub-images, the first vibration mechanism shifting the imaging position of the sub-images along a horizontal direction by a first distance in each frame time;
• and
• a second vibration mechanism disposed on the transmission path of the sub-images, the second vibration mechanism shifting the imaging position of the sub-images along a vertical direction by a second distance in each frame time.