Image pickup device, and its signal reading method

摘要: Each pixel cell (12) of an image sensor (10) is made a 4-Tr structure, in which only one Tr for resetting column (X) so added to ordinary 3-Tr APS as reset arbitrary selectively, thereby confine the size. When signal be read, period, signals composing frame are finely divided that pixels receiving ID light period read out bit by and repeatedly. At this time, being electric current fed amplifier or variable gain output unit (14), suppress power consumption. As result, lower consumption higher formation can attained pickup device picking up acquiring information beacon existing range.