Trajectories of objects are estimated by determining the optimal solution of a tracking model on the basis of an occupancy probability distribution. The control section sets the suction flow velocity to V1 in the first mode in which the light detection section performs the detection, and sets the suction flow velocity to V2 in the second mode. The engine returns one or more operations to the user that can be performed on the input, including calculating mathematical solutions, graphing equations and viewing steps to solving math problems. The URL redirection information may be selected based on a location that corresponds to the code or the proximity device, which may be the location of the mobile device. The interposer includes a wiring having a plurality of branches for electrical connection between the terminal electrode for inputting a high power supply potential to the plurality of optical sensors and a wiring having a plurality of branches for electrical connection between the terminal electrode for inputting a low power supply potential to the plurality of optical sensors.