Patent ID: 8321159

Claim:
A controller for a remaining liquid amount meter configured to display a remaining amount of liquid in a tank of a vehicle, the controller comprising: a detection section for detecting a liquid surface level in the tank; and a storage section for storing a plurality of display levels indicating the remaining amount of liquid in the tank of the vehicle and a cumulative value used to measure a timing of updating a current display level (Rm) displayed by the remaining liquid amount meter, wherein the controller is configured to perform: cumulative processing for increasing the cumulative value when a specified display level (Rm 1 ) based on the liquid surface level detected by the detection section is higher than the current display level (Rm) displayed by the remaining liquid amount meter and for decreasing the cumulative value when the specified display level (Rm 1 ) is lower than the current display level (Rm); display processing for changing the current display level (Rm) displayed by the remaining liquid amount meter when the cumulative value exceeds a predetermined threshold value; and the specified display level (Rm 1 ) is specified based on an average value of the liquid surface levels detected a plurality of times by the detection section.