Patent ID: 7719732

Claim:
A light sensing and processing apparatus for use in an image scanning device to scan a document, comprising: a set of matrix light-sensing cells arranged in a matrix for detecting a scanning location of the scanned document and outputting detected data corresponding to the scanning location; a set of trilinear light-sensing cells, each of which has a plurality of light-sensing cells arranged in a linear array, for detecting a sensing region of the scanning, and outputting image data corresponding to the sensing region; a sensed signal processing unit, coupled to the set of matrix light-sensing cells, for processing the detected data from the set of matrix light-sensing cells and outputting corresponding sensed signals; a color signal processing unit, coupled to the set of trilinear light-sensing cells, for processing the image data and outputting image signals corresponding to the image data, the image signals including red, green, and blue color signals; a plurality of buffers, respectively installed with the sensed signal processing unit and the color signal processing unit, for storing respectively the sensed signals and the image signals; and a synchronization processing unit, connected to the buffers, for receiving the sensed signals and the image signals from the buffers and for adjusting the image signals according to the corresponding sensed signals; wherein the scanning location is adjusted based on the sensed signals to acquire the image data.