Touch device, touch system including the same, and driving method of the touch device
A touch device includes a touch panel including touch electrodes, and a touch driver adjacent to the touch panel, configured to sense a touch of a user, configured to transmit uplink signals including position information of the touch electrodes to an active pen through at least some of the touch electrodes in a first touch period, and configured to receive a sensing signal including position information of the active pen, which is calculated using the uplink signals, from the active pen in a second touch period after the first touch period.
1 . A touch device comprising:
a touch panel including touch electrodes; and
a touch driver adjacent to the touch panel, configured to sense a touch of a user, configured to transmit uplink signals comprising position information of the touch electrodes to an active pen through at least some of the touch electrodes in a first touch period, configured to receive a sensing signal comprising position information of the active pen, which is calculated using the uplink signals, from the active pen in a second touch period after the first touch period, configured to determine a final position at which the touch is sensed in a previous frame, the final position corresponding to a crossing region of a row electrode and a column electrode, and configured to dynamically select two or more of the touch electrodes comprising an adjacent row electrode that is adjacent to the row electrode and an adjacent column electrode that is adjacent to the column electrode to transmit the uplink signals from the two or more of the touch electrodes excluding others of the touch electrodes that are different from the two or more of the touch electrodes.
2 . The touch device of claim 1 , wherein the touch electrodes comprise first touch electrodes extending in a first direction, and second touch electrodes extending in a second direction, and
wherein the touch driver is configured to generate the uplink signals by encoding position information of the first touch electrodes and the second touch electrodes.
3 . The touch device of claim 1 , wherein the touch driver is further configured to transmit the uplink signals through the touch electrodes.
4 . The touch device of claim 1 , wherein a driving mode of the touch driver comprises a pen mode and a touch mode, and
wherein the touch device comprises a switch circuit configured to selectively apply a signal transferred through one signal line to two or more of the touch electrodes during the pen mode.
5 . The touch device of claim 4 , wherein the touch panel comprises pads connected to the touch electrodes, and
wherein the switch circuit is located between the pads and the touch electrodes.
6 . The touch device of claim 1 , wherein a driving mode of the touch driver comprises a pen mode and a touch mode,
wherein the touch electrodes comprise touch electrode groups, and
wherein the touch device comprises a switch circuit configured to selectively connect respective touch electrodes of the touch electrode groups to each other according to a change in the driving mode.
7 . The touch device of claim 1 , wherein the sensing signal further comprises pen information of the active pen, and is configured to be transmitted from the active pen to the touch driver using a Bluetooth® wireless technology scheme.
8 . The touch device of claim 1 , wherein the sensing signal further comprises pen information of the active pen, and is configured to be transmitted as a downlink signal from the active pen to the touch driver through the touch electrodes.
9 . A touch system comprising:
a touch device comprising a touch panel comprising touch electrodes, and a touch driver adjacent the touch panel and configured to sense a touch of a user; and
an active pen configured to communicate with the touch device through the touch panel,
wherein the touch driver is configured to transmit an uplink signal comprising position information to the active pen through at least some of the touch electrodes in a first touch period, is configured to receive a sensing signal comprising position information of the active pen from the active pen in a second touch period after the first touch period, configured to determine a final position at which the touch is sensed in a previous frame, the final position comprising a crossing region of a row electrode and a column electrode, and is configured to dynamically select two or more of the touch electrodes comprising an adjacent row electrode that is adjacent to the row electrode and an adjacent column electrode that is adjacent to the column electrode to transmit the uplink signals from the two or more of the touch electrodes excluding others of the touch electrodes that are different from the two or more of the touch electrodes, and
wherein the active pen further comprises a sensing driver configured to calculate the position information of the active pen by using the uplink signal received through capacitors generated between at least some of the touch electrodes and the active pen.
10 . The touch system of claim 9 , wherein the touch driver is configured to generate the uplink signal by encoding position information of first touch electrodes and second touch electrodes,
wherein the uplink signal is configured to be received from respective ones of the touch electrodes adjacent to the active pen, and
wherein the sensing driver is configured to calculate the position information of the active pen by decoding the uplink signal.
11 . The touch system of claim 10 , wherein the uplink signal comprises a digital component representing position information of one of the touch electrodes transmitting a corresponding uplink signal and an analog component according to capacitance information of a capacitor between the one of the touch electrodes and the active pen.
12 . The touch system of claim 11 , wherein the sensing driver is configured to calculate the position information of the active pen by separating the digital component and the analog component from each other using an algorithm.
13 . The touch system of claim 9 , wherein a driving mode of the touch driver comprises a pen mode and a touch mode, and
wherein the touch system comprises a switch circuit configured to selectively apply a signal transferred through one signal line to two or more of the touch electrodes during the pen mode.
14 . The touch system of claim 9 , wherein the sensing signal comprises position information of the active pen and pen information of the active pen, and
wherein the sensing driver is configured to transmit the sensing signal using a Bluetooth® wireless technology scheme.
15 . A method of driving a touch device, the method comprising:
in a first touch period, transmitting uplink signals comprising position information to an active pen through at least some of touch electrodes of a touch panel; and
in a second touch period after the first touch period, receiving position information of the active pen, which is calculated using the uplink signals, from the active pen; and
dynamically selecting two or more of the touch electrodes based on a final position at which a touch is sensed in a previous frame, the final position comprising a crossing region of a row electrode and a column electrode, the two or more of the touch electrodes comprising an adjacent row electrode that is adjacent to the row electrode and an adjacent column electrode that is adjacent to the column electrode, and transmitting the uplink signals from only the selected two or more of the touch electrodes,
wherein the position information of the active pen is calculated using the uplink signals received through capacitors generated between the at least some of the touch electrodes and the active pen.