US Patent 11654690 Storage amount detection device and liquid discharge device

There is provided a storage amount detection device, which detects a storage amount of an object stored in a storage section that includes a first surface and a second surface, the device including a transmission electrode that is provided on the first surface, a plurality of reception electrodes that are provided on the second surface, a constant voltage terminal, a coupling circuit that is configured to electrically a reception electrode to an output terminal, and a detection circuit that detects the storage amount of the object stored in the storage section, in which the coupling circuit couples the reception electrode, which is not electrically coupled to the output terminal, among the plurality of reception electrodes to the constant voltage terminal, and does not couple a reception electrode, which is electrically coupled to the output terminal, among the plurality of reception electrodes to the constant voltage terminal.