Touch module and electronic device including the same
A touch module includes: a touch array including: a first electrode group including touch electrodes extending in a first direction, and located along a second direction crossing the first direction; and a second electrode group including touch electrodes extending in the second direction, and located along the first direction; and a touch driver to output uplink signals through each of the first electrode group and the second electrode group to an external device adjacent to the touch array, the external device to calculate position information based on the uplink signals. The touch driver is to output the uplink signals by applying touch driving signals to some of the touch electrodes of the first touch electrode group, and at least one synchronization signal to others of the touch electrodes of the first touch electrode group, and at least some of the touch driving signals are synchronized with the synchronization signal.
1 . A touch module comprising:
a touch array comprising:
a first touch electrode group comprising touch electrodes extending in a first direction, and located along a second direction crossing the first direction; and
a second touch electrode group comprising touch electrodes extending in the second direction, and located along the first direction; and
a touch driver configured to output uplink signals through each of the first touch electrode group and the second touch electrode group to an external device adjacent to the touch array, the external device being configured to calculate position information based on the uplink signals,
wherein the touch driver is configured to output the uplink signals by applying touch driving signals to some of the touch electrodes of the first touch electrode group, and by applying at least one synchronization signal to others of the touch electrodes of the first touch electrode group,
wherein at least some of the touch driving signals are synchronized with the at least one synchronization signal,
wherein the touch driving signals comprise first to m-th touch driving signals, and the at least one synchronization signal comprises a first synchronization signal,
wherein the touch electrodes of the first touch electrode group comprise first to m+1-th touch electrodes sequentially located along the second direction,
wherein the touch driver is configured to apply the first to m-th touch driving signals to the first to m-th touch electrodes from among the touch electrodes of the first touch electrode group, and apply the first synchronization signal to the m+1-th touch electrode,
wherein m is an integer greater than 1,
wherein the at least one synchronization signal further comprises a second synchronization signal,
wherein the touch electrodes of the first touch electrode group further comprise a zeroth touch electrode adjacent to the first touch electrode in a direction opposite to the second direction, and
wherein the touch driver is configured to apply the second synchronization signal to the zeroth touch electrode.
2 . The touch module of claim 1 , wherein the touch electrodes of the first touch electrode group are grouped into sub-touch electrode groups, and
wherein the touch driver is configured to apply the touch driving signals and the at least one synchronization signal to each of the sub-touch electrode groups.
3 . The touch module of claim 1 , wherein the at least one synchronization signal comprises a pulse signal having a constant period.
4 . The touch module of claim 1 , wherein the touch driving signals comprise different codes from each other, and the codes are orthogonal to each other.
5 . The touch module of claim 1 , wherein the touch driver is configured to output the uplink signals by applying the touch driving signals to some of the touch electrodes of the second touch electrode group, and by applying the at least one synchronization signal to others of the touch electrodes of the second touch electrode group, and
wherein at least some of the touch driving signals are synchronized with the at least one synchronization signal.
6 . The touch module of claim 5 , wherein the touch driver is configured to apply the touch driving signals to first touch electrodes from among the touch electrodes of the second touch electrode group, and apply the at least one synchronization signal to a second touch electrode adjacent to the first touch electrodes from among the touch electrodes of the second touch electrode group, and
wherein the touch driver is configured to apply the touch driving signals and the at least one synchronization signal concurrently with each other.
7 . The touch module of claim 5 ,
wherein the touch driver is configured to apply the touch driving signals to first touch electrodes from among the touch electrodes of the second touch electrode group, and apply the first synchronization signal and the second synchronization signal to a second touch electrode and a third touch electrode adjacent to the first touch electrodes from among the touch electrodes of the second touch electrode group, and
wherein the first touch electrodes are located between the second touch electrode and the third touch electrode.
8 . The touch module of claim 5 , wherein the touch electrodes of the second touch electrode group are grouped into sub-touch electrode groups, and
wherein the touch driver is configured to apply the touch driving signals and the at least one synchronization signal to each of the sub-touch electrode groups.
9 . A touch module comprising:
a touch array comprising:
a first touch electrode group comprising touch electrodes extending in a first direction, and located along a second direction crossing the first direction; and
a second touch electrode group comprising touch electrodes extending in the second direction, and located along the first direction; and
a touch driver configured to output uplink signals through each of the first touch electrode group and the second touch electrode group to an external device adjacent to the touch array, the external device being configured to calculate position information based on the uplink signals,
wherein the touch driver is configured to output the uplink signals by applying touch driving signals to some of the touch electrodes of the first touch electrode group, and by applying at least one synchronization signal to others of the touch electrodes of the first touch electrode group,
wherein at least some of the touch driving signals are synchronized with the at least one synchronization signal,
wherein the touch driver is configured to output the uplink signals by applying the touch driving signals to some of the touch electrodes of the second touch electrode group, and by applying the at least one synchronization signal to others of the touch electrodes of the second touch electrode group,
wherein at least some of the touch driving signals are synchronized with the at least one synchronization signal,
wherein the touch driving signals comprise first to n-th touch driving signals,
wherein the touch electrodes of the second touch electrode group comprise first to n+1-th touch electrodes sequentially located along the first direction,
wherein the touch driver is configured to apply the first to n-th touch driving signals to first to n-th touch electrodes from among the touch electrodes of the second touch electrode group, and apply the at least one synchronization signal to the n+1-th touch electrode, in a third time interval, and
wherein n is an integer greater than 1.
10 . The touch module of claim 9 , wherein the touch driver is configured to apply the first to n-th touch driving signals to second to n+1-th touch electrodes from among the touch electrodes of the second touch electrode group, and apply the at least one synchronization signal to the first touch electrode, in a fourth time interval.
11 . An electronic device comprising:
a touch array comprising:
a first touch electrode group comprising touch electrodes extending in a first direction, and located along a second direction crossing the first direction; and
a second touch electrode group comprising touch electrodes extending in the second direction, and located along the first direction;
a touch driver configured to output uplink signals through each of the first touch electrode group and the second touch electrode group; and
a host configured to receive position information, which is calculated based on the uplink signals, from an external device adjacent to the touch array and configured to receive the uplink signals,
wherein the touch driver is configured to output the uplink signals by applying touch driving signals to some of the touch electrodes of the first touch electrode group, and by applying at least one synchronization signal to others of the touch electrodes of the first touch electrode group,
wherein at least some of the touch driving signals are synchronized with the at least one synchronization signal,
wherein the touch driving signals comprise first to m-th touch driving signals, and the at least one synchronization signal comprises a first synchronization signal,
wherein the touch electrodes of the first touch electrode group comprise first to m+1-th touch electrodes sequentially located along the second direction,
wherein the touch driver is configured to apply the first to m-th touch driving signals to the first to m-th touch electrodes from among the touch electrodes of the first touch electrode group, and apply the first synchronization signal to the m+1-th touch electrode,
wherein m is an integer greater than 1,
wherein the at least one synchronization signal further comprises a second synchronization signal,
wherein the touch electrodes of the first touch electrode group further comprise a zeroth touch electrode adjacent to the first touch electrode in a direction opposite to the second direction, and
wherein the touch driver is configured to apply the second synchronization signal to the zeroth touch electrode.