Display device and electronic apparatus including the same
A display device, which is operable in a normal mode or a low afterimage mode, includes a display panel including a pixel, a gate driver providing a gate signal to the pixel, an emission driver providing to the pixel an emission signal defining a non-emission period and an emission period, a data driver providing a data voltage to the pixel, and a controller controlling the gate driver, the emission driver, and the data driver. A number of pulses of the gate signal within the non-emission period in the low afterimage mode is greater than a number of the pulses of the gate signal within the non-emission period in the normal mode. A ratio of the non-emission period to a frame period in the low afterimage mode is less than a ratio of the non-emission period to the frame period in the normal mode.
1 . A display device operable in a normal mode or a standby mode including a low afterimage mode, the display device comprising:
a display panel which includes a pixel;
a gate driver which provides a gate signal to the pixel;
an emission driver which provides to the pixel an emission signal defining a non-emission period and an emission period;
a data driver which provides a data voltage to the pixel; and
a controller which controls the gate driver, the emission driver, and the data driver,
wherein a number of pulses of the gate signal within the non-emission period in the low afterimage mode is greater than a number of the pulses of the gate signal within the non-emission period in the normal mode,
wherein a ratio of the non-emission period to a frame period in the low afterimage mode is less than a ratio of the non-emission period to the frame period in the normal mode, and
wherein a voltage of an input white data input to the controller in the low afterimage mode is lower than a voltage of the input white data in the normal mode.
2 . The display device of claim 1 , wherein the pixel includes:
a first transistor which includes a gate electrode connected to a first node, a first electrode connected to a second node, and a second electrode connected to a third node;
a second transistor which includes a gate electrode receiving a write gate signal, a first electrode receiving the data voltage, and a second electrode connected to the second node;
a third transistor which includes a gate electrode receiving the write gate signal, a first electrode connected to the third node, and a second electrode connected to the first node;
a fourth transistor which includes a gate electrode receiving an initialization gate signal, a first electrode receiving an initialization voltage, and a second electrode connected to the first node
a fifth transistor which includes a gate electrode receiving the emission signal, a first electrode receiving a first power voltage, and a second electrode connected to the second node;
a sixth transistor which includes a gate electrode receiving the emission signal, a first electrode connected to the third node, and a second electrode connected to a fourth node;
a storage capacitor which includes a first electrode connected to the first node and a second electrode receiving the first power voltage; and
a light emitting diode which includes a first electrode connected to the fourth node and a second electrode receiving a second power voltage.
3 . The display device of claim 2 , wherein the gate signal includes the initialization gate signal and the write gate signal.
4 . The display device of claim 2 , wherein a hysteresis change amount of the first transistor in the low afterimage mode is less than a hysteresis change amount of the first transistor in the normal mode.
5 . The display device of claim 1 , wherein a range of the data voltage in the low afterimage mode is less than a range of the data voltage in the normal mode.
6 . The display device of claim 1 , wherein a number of pulses of the emission signal within the frame period in the low afterimage mode is greater than a number of the pulses of the emission signal within the frame period in the normal mode.
7 . The display device of claim 1 , further comprising:
a power management circuit which provides a high gate voltage and a low gate voltage to the gate driver,
wherein a voltage level of the high gate voltage in the low afterimage mode is lower than a voltage level of the high gate voltage in the normal mode.
8 . The display device of claim 7 , wherein a voltage level of the low gate voltage in the low afterimage mode is equal to a voltage level of the low gate voltage in the normal mode.
9 . The display device of claim 1 , wherein the standby mode further includes an illuminance sensing mode in which an ambient illuminance is detected.
10 . The display device of claim 9 , wherein a ratio of the non-emission period to the frame period in the illuminance sensing mode is greater than the ratio of the non-emission period to the frame period in the low afterimage mode.
11 . The display device of claim 9 , wherein the illuminance sensing mode is performed when a user views an image displayed by the display panel.
12 . The display device of claim 1 , wherein the standby mode further includes a low power mode, and
wherein a number of the pulses of the gate signal within the non-emission period in the low power mode is less than the number of the pulses of the gate signal within the non-emission period in the low afterimage mode.
13 . The display device of claim 12 , wherein the low afterimage mode is performed after the low power mode is performed for a predetermined time.
14 . The display device of claim 1 , wherein the standby mode is a mode in which the display panel displays an AOD (Always On Display) image.
15 . An electronic apparatus, comprising:
a display device operable in a normal mode or a standby mode including a low afterimage mode;
a gyro sensor which detects a rotation state of the display device; and
an illuminance sensor which detects an ambient illuminance around the display device,
wherein the display device includes:
a display panel which includes a pixel;
a gate driver which provides a gate signal to the pixel;
an emission driver which provides an emission signal defining a non-emission period and an emission period to the pixel;
a data driver which provides a data voltage to the pixel; and
a controller which controls the gate driver, the emission driver, and the data driver,
wherein a number of pulses of the gate signal within the non-emission period in the low afterimage mode is greater than a number of the pulses of the gate signal within the non-emission period in the normal mode,
wherein a ratio of the non-emission period to a frame period in the low afterimage mode is less than a ratio of the non-emission period to the frame period in the normal mode, and
wherein a voltage of an input white data input to the controller in the low afterimage mode is lower than a voltage of the input white data in the normal mode.
16 . The electronic apparatus of claim 15 , wherein a range of the data voltage in the low afterimage mode is less than a range of the data voltage in the normal mode.
17 . The electronic apparatus of claim 15 , wherein the display device further includes a power management circuit which provides a high gate voltage and a low gate voltage to the gate driver, and wherein a voltage level of the high gate voltage in the low afterimage mode is lower than a voltage level of the high gate voltage in the normal mode.
18 . The electronic apparatus of claim 15 , wherein the standby mode further includes an illuminance sensing mode in which the illuminance sensor detects the ambient illuminance.
19 . The electronic apparatus of claim 18 , wherein a ratio of the non-emission period to the frame period in the illuminance sensing mode is greater than the ratio of the non-emission period to the frame period in the low afterimage mode.
20 . The electronic apparatus of claim 18 , wherein whether a user views an image displayed by the display device is determined using the gyro sensor, and
wherein the illuminance sensing mode is performed when the user views the image.