Remaining-liquid-amount display apparatus and remaining liquid-amount display method

A remaining-liquid-amount display apparatus for displaying an amount of conductive liquid remaining in a liquid container, comprising:

• a plurality of electrode units which are arranged along a direction in which the liquid level falls when the amount of liquid in the container decreases, each electrode unit including a detection electrode and a common electrode which are disposed in the vicinity of each other and which conduct current therebetween when the detection electrode and the common electrode are in contact with the liquid;
• a voltage source which applies a voltage between the detection electrode and the common electrode of each of the electrode units;
• a liquid detector which detects the presence/absence of the liquid at positions of the electrode units on the basis of whether or not current is conducted from the detection electrode to the common electrode in each of the electrode units when the voltage is applied by the voltage source;
• and
• a remaining-liquid-amount display unit which displays, in steps, the amount of liquid remaining in the container on the basis of the detection result of the presence/absence of the liquid at positions of the electrode units obtained by the liquid detector.