Liquid container, liquid remaining amount detection circuit of liquid container, liquid remaining amount detection method, liquid container identification method, ink mounting unit, printer, and print system

A detection circuit connected to a plurality of detection electrodes mounted on a liquid container, comprising:

• a capacitor having a reference capacitance;
• a capacitance/voltage conversion circuit configured to determine a voltage value corresponding to a level of a liquid in the liquid container by comparing capacitances detected by the plurality of detection electrodes with the reference capacitance;
• an analog/digital converter connected to an output of the capacitance/voltage conversion circuit, and configured to convert the voltage value into a digital signal;
• and
• a microcontroller unit connected to an output of the analog/digital converter, and configured to receive the digital signal as a value of the level of the liquid,
• wherein the detection circuit detects a degree of tilt of the liquid container based on the capacitances detected by the plurality of detection electrodes, and detects a remaining amount of the liquid in the liquid container according to the detected degree of tilt,
• wherein the plurality of detection electrodes is installed with a predetermined distance from the liquid so as to prevent the plurality of detection electrodes from making direct contact with the liquid,
• wherein the plurality of detection electrodes extends along an outer wall of the liquid container and parallel with the outer wall, and
• wherein the plurality of detection electrodes is arranged on the outer wall such that at least a portion of each of the plurality of detection electrodes is exposed to an outside of the liquid container.