US Patent 11654689 Liquid discharge device

A liquid discharge device includes a discharge section that discharges a liquid, a storage section that includes a first surface and a second surface separated from the first surface in a first direction, and is configured to store the liquid between the first surface and the second surface, a transmission electrode that is provided on the first surface, a reception electrode that is provided on the second surface, a filter circuit that removes a predetermined frequency component from an electric signal supplied from the reception electrode, and a detection circuit that detects a storage amount of the liquid stored in the storage section based on an output from the filter circuit.