Touch system and display device
A touch system may include a touch array including touch electrodes, a touch driver configured to apply touch driving signals including different codes to the touch electrodes to thereby transmit uplink signals to objects adjacent to the touch array, at least one sub-host connected to at least one object among the objects through a communication channel, and configured to receive, from the at least one object, position information corresponding to the at least one object through the communication channel, and a main host configured to receive the position information corresponding to the at least one object through the at least one sub-host.
1. A touch system comprising:
a touch array including a plurality of touch electrodes;
a touch driver configured to apply touch driving signals including different codes respectively to the touch electrodes and to transmit uplink signals to a plurality of objects adjacent to the touch array through the touch electrodes;
at least one sub-host connected to at least one object among the plurality of objects through a direct wireless communication channel between the at least one sub-host and the at least one object, and configured to receive, from the at least one object, position information corresponding to the at least one object through the direct wireless communication channel, the direct wireless communication channel between the at least one sub-host and the at least one object being formed outside of the touch array; and
a main host configured to control the touch driver and to receive the position information corresponding to the at least one object among the plurality of objects through the at least one sub-host.
2. The touch system according to claim 1 , wherein the direct wireless communication channel comprises a radio communication channel based on Bluetooth communication.
3. The touch system according to claim 1 , wherein the at least one sub-host is connected to the main host through an additional communication channel and transmits the position information corresponding to the at least one object to the main host through the additional communication channel.
4. The touch system according to claim 1 , wherein each of the plurality of objects is configured to compute position information corresponding to the object, based on uplink signals received from touch electrodes adjacent to the object among the touch electrodes.
5. The touch system according to claim 1 , wherein the uplink signals include digital components representing the different codes and include analog components depending on capacitances between the touch electrodes and the plurality of objects.
6. The touch system according to claim 1 ,
wherein the touch driver transmits the uplink signals in a first period, and
wherein the at least one sub-host receives the position information corresponding to the at least one object in a second period after the first period.
7. The touch system according to claim 1 ,
wherein the touch driver receives a downlink signal from a remaining object among the plurality of objects through at least some of the touch electrodes, and
wherein the main host acquires position information corresponding to the remaining object based on the downlink signal.
8. The touch system according to claim 1 ,
wherein the touch electrodes comprise driving electrodes extending in a first direction, and sensing electrodes extending in a second direction intersecting with the first direction, and
wherein the uplink signals are transmitted through the driving electrodes and the sensing electrodes.
9. The touch system according to claim 1 , wherein the at least one sub-host further receives object status information from the at least one object and transmits the object status information to the main host.
10. The touch system according to claim 1 , wherein the at least one sub-host comprises a first sub-host configured to receive first position information from a first object among the plurality of objects, and a second sub-host configured to receive second position information from a second object among the plurality of objects.
11. The touch system according to claim 10 , wherein the first sub-host further receives third position information from a third object among the plurality of objects.
12. The touch system according to claim 10 , wherein the main host receives the first position information from the first sub-host and receives the second position information from the second sub-host.
13. A display device, comprising:
a display panel including a plurality of pixels;
a display driver configured to drive the plurality of pixels;
a touch array including a plurality of touch electrodes;
a touch driver configured to apply touch driving signals including different codes to the touch electrodes to transmit uplink signals to a plurality of objects adjacent to the touch array through the touch electrodes;
at least one sub-host connected to at least one object of the plurality of objects through a direct wireless communication channel between the at least one sub-host and the at least one object, and configured to receive, from the at least one object, position information corresponding to the at least one object through the direct wireless communication channel, the direct wireless communication channel between the at least one sub-host and the at least one object being formed outside of the touch array; and
a main host configured to control the display driver and the touch driver and to receive the position information corresponding to the at least one object among the plurality of objects through the at least one sub-host.
14. The display device according to claim 13 , wherein the main host generates image information based on the position information corresponding to the at least one object and provides the image information to the display driver.
15. The display device according to claim 13 , wherein the at least one sub-host comprises a first sub-host configured to receive first position information from a first object among the plurality of objects, and a second sub-host configured to receive second position information from a second object among the plurality of objects.
16. The display device according to claim 15 , wherein the first sub-host further receives third position information from a third object among the plurality of objects.
17. The display device according to claim 15 , wherein the main host receives the first position information from the first sub-host and receives the second position information from the second sub-host.
18. An electronic device, comprising:
a display device including a display panel, the display panel including a plurality of pixels; and
a host providing image data to the display device,
wherein the display device further includes:
a display driver configured to drive the plurality of pixels;
a touch array including a plurality of touch electrodes; and
a touch driver configured to apply touch driving signals including different codes to the touch electrodes to transmit uplink signals to a plurality of objects adjacent to the touch array through the touch electrodes,
wherein the host includes a main host and at least one sub-host,
wherein the at least one sub-host is connected to at least one object of the plurality of objects through a direct wireless communication channel between the at least one sub-host and the at least one object, and receives, from the at least one object, position information corresponding to the at least one object through the direct wireless communication channel which is formed outside of the touch array, and
wherein the main host controls the display driver and the touch driver and receives the position information corresponding to the at least one object among the plurality of objects through the at least one sub-host.