Display device

A display device comprising:

• a display panel including pixels;
• a power voltage generator configured to apply a power current to the display panel in a driving period;
• and
• a current sensor including a sensing resistor disposed between the display panel and the power voltage generator, a sensing current determiner configured to determine a sensing current, and a constant current generator configured to generate constant currents to provide to the sensing resistor in a test period,
• wherein the sensing current determiner is configured to determine test sensing currents based on a test sensing voltage applied to opposite electrodes of the sensing resistor according to the constant currents in the test period and an initial sensing resistance, to determine candidate sensing resistances based on the test sensing currents, the initial sensing resistance, and the constant currents, to determine a first sensing resistance based on the candidate sensing resistances, to determine the sensing current based on a driving sensing voltage applied to the opposite electrodes of the sensing resistor in the driving period and the first sensing resistance, and to determine the sensing current as the power current,
• wherein the initial sensing resistance is a predetermined resistance of the sensing resistor,
• wherein the current sensor further comprises a test switching element disposed between the display panel and the sensing resistor, directly connected to the sensing resistor, and configured to be switched off in the test period and to be switched on in the driving period such that in the test period, the power voltage generator does not apply the power current to the display panel.

An electronic device comprising:

• a display panel including pixels;
• a power voltage generator configured to apply a power current to the display panel;
• and
• a current sensor disposed on a printed circuit board, and including a sensing resistor disposed between the display panel and the power voltage generator, a sensing current determiner configured to determine a sensing current, and a filter connecting the sensing resistor and the sensing current determiner,
• wherein the sensing current determiner is configured to sense a temperature of the printed circuit board, to determine a first sensing resistance based on the temperature of the printed circuit board and an initial sensing resistance, to determine the sensing current based on a driving sensing voltage applied to opposite electrodes of the sensing resistor and the first sensing resistance, and to determine the sensing current as the power current,
• wherein the initial sensing resistance is a predetermined resistance of the sensing resistor,
• wherein the filter includes a first filter resistor including a first electrode directly connected to one of the opposite electrodes of the sensing resistor and a second electrode directly connected to the sensing current determiner, a second filter resistor including a first electrode directly connected to another of the opposite electrodes of the sensing resistor and a second electrode directly connected to the sensing current determiner, and a filter capacitor including a first electrode directly connected to the second electrode of the first filter resistor and a second electrode directly connected to the second electrode of the second filter resistor.