Patent ID: 7084417

Claim:
A positioning structure of a plane image input apparatus, comprising: a body, having a hollow interior, having an outer upper side for holding a document to be scanned, and having an inner bottom side holding a correct picture therein; and an optical module, located in the hollow interior, movable reciprocally, and including a correct light source for emitting light, a correct hole for reflecting the light to the optical module, a guiding prism set for directing the light and a charge-coupled device for receiving the light, the correct light source and the correct hole being located on the inner bottom side of the body, the correcting light source emitting the light to the correct picture when the optical module is corresponding to the correct picture, the light being reflected to the optical module through the correct hole, the guiding prism set directing the light to the charge-coupled device for the optical module to perform color rank correction and positioning.