Display device, electronic device including the same, and method of driving the same
A display device including a display panel including a first display area containing first pixels at a first density and a second display area containing second pixels at a second density smaller than the first density, each of the first pixels and the second pixels including a light-emitting element, a power supply circuit configured to supply a first anode initialization voltage to each of the first pixels and supply a second anode initialization voltage to each of the second pixels, and a timing controller configured to control the power supply circuit so that a voltage level of the second anode initialization voltage becomes greater than a voltage level of the first anode initialization voltage.
1 . An electronic device comprising:
a sensor configured to emit infrared light;
a display device comprising a first display area in which first pixels are disposed at a first density and a second display area in which second pixels are disposed at a second density lower than the first density, the display device being configured to supply a first anode initialization voltage to the first pixels and supply a second anode initialization voltage to the second pixels; and
a host configured to output a control signal to the display device so that a voltage level of the second anode initialization voltage becomes higher than a voltage level of the first anode initialization voltage while the sensor emits the infrared light.
2 . The electronic device according to claim 1 , wherein the sensor is located to overlap with the second display area in a direction in which the infrared light is emitted.
3 . The electronic device according to claim 1 , wherein the first display area surrounds the second display area.
4 . The electronic device according to claim 1 , wherein the display device comprises a power supply circuit configured to supply the first anode initialization voltage and the second anode initialization voltage, and
the host is configured to:
output an infrared sensor control signal for controlling a timing at which the sensor outputs the infrared light; and
output a power supply circuit control signal for changing the voltage level of the second anode initialization voltage output by the power supply circuit in accordance with a timing at which a level of the infrared sensor control signal changes.
5 . The electronic device according to claim 4 , wherein the infrared sensor control signal has either a low level corresponding to a period in which the sensor is not operating or a high level corresponding to a period in which the sensor is operating,
the power supply circuit is configured to raise the voltage level of the second anode initialization voltage from a first level during a period in which the infrared sensor control signal of the high level is input to the sensor, and
the first level is the level of the first anode initialization voltage.
6 . The electronic device according to claim 5 , wherein the power supply circuit is configured to, when the sensor emits the infrared light, supply the second anode initialization voltage at a second level higher than the first level for a threshold period.
7 . The electronic device according to claim 6 , wherein a length of the threshold period is less than one minute.
8 . The electronic device according to claim 6 , wherein the power supply circuit is configured to, when the sensor emits the infrared light and the threshold period has elapsed, supply the second anode initialization voltage at a third level higher than the second level.
9 . The electronic device according to claim 6 , wherein the power supply circuit is configured to, when the sensor stops emitting the infrared light, supply the second anode initialization voltage at the first level.