Patent ID: 7053949

Claim:
A control system for the charge coupled device of a scanner, the charge coupled device having ability to process a plurality of primary colors, the charge coupled device at least including a shift register and a transfer gate, the control system comprising: a transfer controller, coupled to the charge coupled device, used to provide a transfer signal and a charge-shift control signal, wherein the charge coupled device is controlled by the transfer signal, and all charge data with respect to the primary colors are transferred to the shift register through the transfer gate in one operation when the transfer signal is true; a charge-shift enable generator, coupled to the transfer controller and sequentially issuing a plurality of charge-shift enable signals with respect to the primary colors, according to the transfer signal; and a combined logic circuit, coupled to the transfer controller, the charge-shift enable generator, and the charge coupling device, wherein according to the charge-shift enable signals and the charge-shift control signal, issuing a plurality of charge-shift clock signals with respect to the primary colors after computation by the combined logic circuit, wherein each one of the charge-shift clock signals corresponds to one of the primary colors, and the shift register shifts out the corresponding charge data according to each of the charge-shift clock signals.