Liquid discharge device, liquid remaining amount judgment device, and liquid remaining amount judgment method

摘要

PROBLEM TO BE SOLVED: To quickly and accurately determine a state of remaining liquid in a liquid storage container. A liquid discharge device 100 energizes a pair of electrodes 220 and 221 located in a liquid storage container 219, and detects a voltage value generated between the pair of electrodes. A plurality of detected voltage values are stored, and a transition amount of a plurality of voltage values is acquired based on the stored plurality of voltage values. The latest voltage fluctuation amount is obtained by comparing this transition amount with the detected latest voltage value. When the acquired fluctuation amount is larger than a predetermined threshold value, it is determined that the remaining amount state of the liquid in the liquid storage container is an unstable state in which bubbles are generated. [Selection diagram] FIG. 11