Display device and method of driving the same
A display device includes a display panel including a plurality of subpixels connected to a high-potential voltage line and a plurality of low-potential voltage lines, respectively, a driver configured to drive the display panel, and a circuit configured to sense and compensate for a characteristic of a subpixel, among the plurality of pixels, through at least one of the plurality of low-potential voltage lines.
1 . A display device, comprising:
a display panel comprising a plurality of subpixels connected to at least one first voltage line and a plurality of second voltage lines, respectively, the at least one first voltage line being configured to transmit a first supply voltage, and the plurality of second voltage lines being configured to transmit a second supply voltage lower than the first supply voltage;
a driver configured to drive the display panel;
at least one switch connected between two second voltage lines next to each other among the plurality of second voltage lines, the two second voltage lines extending in a first direction in parallel to each other and being spaced apart from and next to each other in a second direction different from the first direction; and
a circuit configured to sense and compensate for a characteristic of a subpixel, among the plurality of subpixels, through a second voltage line, among the two second voltage lines, connected to the subpixel.
2 . The display device according to claim 1 , wherein the plurality of second voltage lines are parallel to a data line extending in the first direction on the display panel.
3 . The display device according to claim 1 , wherein:
the at least one switch is configured to be turned on during a display period in which an image is displayed based on the plurality of subpixels; and
the at least one switch is configured to be turned off during a sensing period in which the characteristic of the subpixel is sensed.
4 . The display device according to claim 3 , wherein the circuit is further configured to sense the characteristic of the subpixel by using the second voltage line as a sensing line during the sensing period.
5 . The display device according to claim 1 , wherein the at least one switch is selectively disposed in one of an active area and a non-active area of the display panel.
6 . The display device according to claim 4 , wherein a reference voltage higher than the second supply voltage applied during the display period is applied to the second voltage line used as the sensing line during the sensing period.
7 . The display device according to claim 1 , wherein the display panel further comprises:
at least one shorting bar electrically connecting two other second voltage lines next to each other in the plurality of second voltage lines;
a switch arrangement area in which the at least one switch is disposed; and
a shorting bar arrangement area in which the at least one shorting bar is disposed.
8 . The display device of claim 1 , wherein:
the display panel has a display period during which an image is displayed based on the plurality of subpixels and a sensing period during which the characteristic of the subpixel is sensed; and
the plurality of second voltage lines are configured to transmit the second supply voltage respectively to the plurality of subpixels during the display period and not to transmit the second supply voltage to the plurality of subpixels during the sensing period.
9 . The display device of claim 8 , wherein:
the at least one switch is configured to be turned on during the display period to electrically connect the two second voltage lines to each other; and
the at least one switch is configured to be turned off during the sensing period to electrically disconnect the two second voltage lines from each other.
10 . The display device of claim 8 , further comprising:
at least one switch control line connected to the at least one switch and configured to transmit a turn-on voltage to the at least one switch during the display period and to transmit a turn-off voltage to the at least one switch during the sensing period.
11 . The display device of claim 1 , wherein:
the subpixel and at least two other subpixels, among the plurality of subpixels, configure one pixel; and
the second voltage line is connected to each of the subpixel and the two other subpixels.
12 . The display device of claim 1 , further comprising:
a power supply configured to supply the first supply voltage to the at least one first voltage line and to supply the second supply voltage to the plurality of second voltage lines.
13 . The display device of claim 1 , wherein the at least one switch includes one electrode connected to one of the two second voltage lines and another electrode connected to the other of the two second voltage lines.