Patent ID: 7851738
Filing Date: 2010-12-14
Classification: H04N

Abstract:
1. A driver circuit, comprising: a shift signal generator for sequentially outputting shift signals at a predetermined time interval; a plurality of amplifiers for respectively receiving a plurality of detection signals read out in parallel corresponding to a detectable object image pattern and respectively receiving the shift signals, wherein the plurality of amplifiers respectively amplify and output the detection signals inputted thereto based on an output timing of each of the shift signals inputted thereto; a plurality of current controllers respectively corresponding to the plurality of amplifiers, for individually controlling a supply state of electrical current to each of the amplifiers based on the output timing of each of the shift signals; and a data converter for outputting in time series each of the amplified detection signals outputted from each of the amplifiers based on the output timing of each of the shift signals and for generating time series read data; wherein each of the current controllers comprises means for setting the amplifier corresponding to the current controller in a drive state when the amplifier is supplied with one of the shift signals by the shift signal generator and for setting the amplifier in a non-drive state when the amplifier is not supplied with one of the shift signals; and wherein each of the amplifiers comprises a first transistor element and a second transistor element coupled in series to form a current path between terminals of a predetermined supply voltage, wherein a signal based on the received detection signal is applied to a control terminal of the first transistor element, and wherein the amplified detection signal is outputted from a junction point in the current path of the first transistor element and the second transistor element.