Display device including touch drivers, and touch device
A display device includes a first display panel, a second display panel disposed adjacent to the first display panel, a first touch array disposed on the first display panel, a second touch array disposed on the second display panel, a first touch driver that applies a first touch driving signal to the first touch array in response to a frame synchronization signal, a second touch driver that applies a second touch driving signal to the second touch array in response to the frame synchronization signal, and a common line commonly connected to the first and second touch drivers to transmit the frame synchronization signal, and pulses included in the first touch driving signal and pulses included in the second touch driving signal have phases opposite to each other.
1 . A display device comprising:
a first display panel;
a second display panel disposed adjacent to the first display panel;
a first touch array disposed on the first display panel;
a second touch array disposed on the second display panel;
a first touch driver that applies a first touch driving signal to the first touch array in response to a frame synchronization signal;
a second touch driver that applies a second touch driving signal to the second touch array in response to the frame synchronization signal; and
a common line commonly connected to the first and second touch drivers to transmit the frame synchronization signal,
wherein pulses included in the first touch driving signal and pulses included in the second touch driving signal have phases opposite to each other,
wherein each of the pulses included in the first touch driving signal and each of the pulses included in the second touch driving signal are generated based on a rising edge or a falling edge of a pulse synchronization signal, and
wherein generation of the pulses is initiated in response to a rising edge or a falling edge of the frame synchronization signal that transitions once per frame period to indicate a start of the frame period.
2 . The display device according to claim 1 , wherein the pulses included in the second touch driving signal lag the phases of the pulses included in the first touch driving signal by 180 degrees.
3 . The display device according to claim 2 , wherein the first and second touch driving signals have a same pulse width.
4 . The display device according to claim 1 , wherein each of the first and second touch driving signals include pulses toggled between a first voltage level and a second voltage level, and
when the first touch driving signal transitions from the first voltage level to the second voltage level, the second touch driving signal transitions from the second voltage level to the first voltage level.
5 . The display device according to claim 1 , wherein the first touch array includes touch electrodes,
the touch electrodes are divided into a plurality of touch electrode groups,
the first touch driving signal includes a set of sub-touch driving signals, and
each of the touch electrode groups receives the set of sub-touch driving signals in different time periods among a plurality of time periods.
6 . The display device according to claim 5 , wherein when one of the sub-touch driving signals has a first voltage level, remaining ones of the sub-touch driving signals has a second voltage level.
7 . The display device according to claim 1 , wherein the common line includes a first common line transmitting the frame synchronization signal and a second common line transmitting the pulse synchronization signal, and
the first and second touch drivers receive the frame synchronization signal through the first common line and the pulse synchronization signal through the second common line.
8 . The display device according to claim 7 , wherein the first and second touch driving signals are generated using pulses of the pulse synchronization signal.
9 . The display device according to claim 7 , wherein the frame synchronization signal and the pulse synchronization signal are pulse signals with different periods.
10 . The display device according to claim 1 , wherein the first and second display panels are disposed side by side in a first direction or in a second direction different from the first direction to display one image.
11 . A touch device comprising:
a first touch array;
a second touch array;
a first touch driver that applies a first touch driving signal to the first touch array in response to a frame synchronization signal;
a second touch driver that applies a second touch driving signal to the second touch array in response to the frame synchronization signal; and
a common line commonly connected to the first and second touch drivers to transmit the frame synchronization signal,
wherein pulses included in the first touch driving signal and pulses included in the second touch driving signal have phases opposite to each other,
wherein each of the pulses included in the first touch driving signal and each of the pulses included in the second touch driving signal are generated based on a rising edge or a falling edge of a pulse synchronization signal,
wherein generation of the pulses is initiated in response to a rising edge or a falling edge of the frame synchronization signal that transitions once per frame period to indicate a start of the frame period.
12 . The touch device according to claim 11 , wherein the pulses included in the second touch driving signal lag the phases of the pulses included in the first touch driving signal by 180 degrees.
13 . The touch device according to claim 12 , wherein the first and second touch driving signals have a same pulse width.
14 . The touch device according to claim 11 , wherein the common line includes a first common line transmitting the frame synchronization signal and a second common line transmitting the pulse synchronization signal, and
the first and second touch drivers receive the frame synchronization signal through the first common line and receive the pulse synchronization signal through the second common line.
15 . The touch device according to claim 14 , wherein the first and second touch driving signals are generated using pulses of the pulse synchronization signal.
16 . An electronic device comprising:
a display device including:
a first display panel;
a second display panel disposed adjacent to the first display panel;
a first touch array disposed on the first display panel;
a second touch array disposed on the second display panel;
a first touch driver that applies a first touch driving signal to the first touch array in response to a frame synchronization signal;
a second touch driver that applies a second touch driving signal to the second touch array in response to the frame synchronization signal,
wherein when the first touch driving signal transitions from a first voltage level to a second voltage level, the second touch driving signal transitions from the second voltage level to the first voltage level,
wherein each of the pulses included in the first touch driving signal transition from the first voltage level to the second voltage level based on a rising edge or a falling edge of a pulse synchronization signal, and
wherein each of the pulses included in the second touch driving signal transition from the first voltage level to the second voltage level based on the rising edge or the falling edge of the pulse synchronization signal, and
wherein generation of the pulses is initiated in response to a rising edge or a falling edge of the frame synchronization signal that transitions once per frame period to indicate a start of the frame period.
17 . The electronic device according to claim 16 , further comprising:
a common line commonly connected to the first and second touch drivers to transmit the frame synchronization signal.
18 . The electronic device according to claim 16 , wherein pulses included in the first touch driving signal and pulses included in the second touch driving signal have phases opposite to each other.
19 . The electronic device according to claim 16 , wherein the pulses included in the second touch driving signal lag the phases of the pulses included in the first touch driving signal by 180 degrees.
20 . The electronic device according to claim 19 , wherein the first and second touch driving signals have a same pulse width.