Patent ID: 7248387

Claim:
An apparatus, comprising: a decision device coupled to an input device, said decision device capable of receiving input image data and outputting decision data based at least in part on count data and data access volume; a driving device coupled to the decision device capable of receiving the decision data and capable of adjusting the scanning speed according to the decision data; an image buffer coupled to an output terminal of the input device capable of receiving the input image data, and temporarily storing the input image data and outputting output image data to an input/output interface coupled to the decision device; an up-down counter coupled to an input terminal of the image buffer and an output terminal of the image buffer capable of counting and recording data access volume inside the image buffer and outputting count data; and a comparator coupled to the up-down counter capable of receiving the count data, and deciding whether to increase or decrease the scanning speed according to the count data and outputting the decision data.