Patent ID: 8451110

Claim:
A seat belt warning apparatus, comprising: a plurality of seat belt switches each of which is provided in each of a plurality of seats having seat belts and indicates whether each of the seat belts are fastened as on/off states; a storage unit; a control unit that stores flag groups in the storage unit, the flag group being corresponded to a plurality of successive points of time and identifying whether each of the seat belts is fastened based on on/off states of each of the plurality of seat belt switches in the storage unit; and a notification unit that performs a notifying operation under the control of the control unit, wherein the control unit compares a first flag group for each of the plurality of seat belt switches stored in the storage unit at a first point of time with a second flag group for each of the plurality of seat belt switches stored in the storage unit at a second point of time after the first point of time, and directs the notification unit to output a notice when it is determined that the number of seats where the seat belts are fastened except a driver's seat is reduced; then the control unit compares the second flag group for each of the plurality of seat belt switches stored in the storage unit at the second point of time with a third flag group for each of the plurality of seat belt switches stored in the storage unit at a third point of time after the second point of time, and directs the notification unit to stop the output of the notice when it is determined that the number of seats where the seat belts are fastened except the driver's seat is equal to or more than that when the notification unit outputs the notice.