Provided is an image sensor and a method of manufacturing the image sensor which can remove a dead zone and increase light collection efficiency. Disclosed signal generation embodiments can be used to generate digital signals having desired phase variation. The device is capable of varying a direction orand a range of the detection area in a vertical direction, and setting, during a normal time, the direction orand the range of the detection area in the vertical direction to a normal state in which the object is correctly detected, and performing a detection operation in the normal state. The communication system can be integrated with staff and equipment tracking for automated closure of tasks. If the server receives a message that requires that the reference dataset be up-to-date, such as a request for changes from the reference dataset, the sync server processes all of the changes in the queue before processing the new message. The microcontroller controls the power supply for the auxiliary memory module such that the auxiliary memory can be switched over to an energy saving mode.