Patent ID: 7746513
Filing Date: 2010-06-29
Classification: H04N

Abstract:
1. A scanner, comprising: a light source, for emitting a light beam to a to-be-scanned document; an optical module, comprising a photo sensing device for receiving the light beam reflected by the to-be-scanned document, for reading a plurality of scan lines of the to-be-scanned document; a driving device for generating a relative movement between the optical module and the to-be-scanned document, wherein the driving device comprises a position detecting device for detecting a position of the optical module relative to the to-be-scanned document and outputting a position feedback signal accordingly; and a control unit, comprising a light source controller for controlling the luminance of the light source, and a timer for controlling the light source controller according to the position feedback signal, so that exposure level for each of the scan lines remains the same.