Patent ID: 8692972

Claim:
A stereoscopic image printing device comprising: an actuating unit for moving a grating structure; a print head for transferring a plurality of target image data onto corresponding positions of the grating structure; a first detecting module comprising: a plurality of first shelters disposed on a side of the grating structure; a first planar light source disposed on the other side of the grating structure for emitting light to pass through the grating structure and an interval between the adjacent first shelters; and a first photosensitive component disposed on the side of the grating structure for receiving the light emitted from the first planar light source passing through the grating structure and the interval between the adjacent first shelters so as to generate a corresponding first optical intensity signal; a second detecting module comprising: a plurality of second shelters disposed on the side of the grating structure; a second planar light source disposed on the other side of the grating structure for emitting light to pass through the grating structure and an interval between the adjacent second shelters; and a second photosensitive component disposed on the side of the grating structure for receiving the light emitted from the second planar light source passing through the grating structure and the interval between the adjacent second shelters so as to generate a corresponding second optical intensity signal; and a controlling unit coupled to the print head, the first photosensitive component and the second photosensitive component for controlling the print head to transfer a corresponding target image datum of the plurality of target image data onto the grating structure according to comparison of the first optical intensity signal and the second optical intensity signal.