Touch sensor and display device including the same
View Patent ↗Disclosed is a touch sensor, including: a plurality of driving electrodes; a plurality of detection electrodes positioned to cross the driving electrodes; and a driver configured to supply driving signals corresponding to driving codes to the driving electrodes, in which the driver supplies the same driving signal as that of a previous driving period to a corresponding driving electrode for a current driving period when the driving code is set to a first value, and supplies a driving signal different from that of the previous driving period to the corresponding driving electrode for the current driving period when the driving code is set to a second value.
1. A touch sensor, comprising: a plurality of driving electrodes;
a plurality of detection electrodes positioned to cross the driving electrodes; and
a driver configured to supply driving signals corresponding to driving codes to the driving electrodes,
wherein the driver supplies the same driving signal as that of a previous driving period to a corresponding driving electrode for a current driving period when the driving code is set to a first value, and supplies a driving signal different from that of the previous driving period to the corresponding driving electrode for the current driving period when the driving code is set to a second value;
wherein the driving signals include a first driving signal and a second driving signal, and
wherein when the driving code is set to the first value, and the first driving signal is supplied to the corresponding driving electrode for the previous driving period, the first driving signal is supplied to the corresponding driving electrode for the current driving period.
2. The touch sensor of claim 1 , wherein when the driving code is set to the second value, and the first driving signal is supplied to the corresponding driving electrode for the previous driving period, the second driving signal is supplied to the corresponding driving electrode for the current driving period.
3. The touch sensor of claim 1 , wherein the driving signals include a first driving signal and a second driving signal.
4. The touch sensor of claim 1 , wherein the driving codes form one code matrix.
5. The touch sensor of claim 4 , wherein rows of the code matrix correspond to the driving electrodes, respectively, and
columns of the code matrix correspond to the driving periods, respectively.
6. The touch sensor of claim 4 , wherein the code matrix is the Hadamard matrix.
7. The touch sensor of claim 4 , wherein each of the driving codes is set to a value of A or −A, A being a natural number.
8. The touch sensor of claim 7 , wherein the value of A is 1.
9. The touch sensor of claim 1 , wherein the driving electrodes and the detection electrodes are formed of a transparent conductive material.
10. The touch sensor of claim 1 , wherein the driver simultaneously supplies the driving signals to the driving electrodes.
11. A touch sensor, comprising:
a plurality of driving electrodes;
a plurality of detection electrodes positioned to cross the driving electrodes; and
a driver configured to supply driving signals corresponding to driving codes to the driving electrodes, wherein the driving signals include a first driving signal and a second driving signal that is an inverted signal of first driving signal,
wherein, during the initial driving period, the driver supplies the first driving signal to half of the driving electrodes and the second driving signal to the rest of the driving electrodes, and
wherein the driver supplies the same driving signal as that of a previous driving period to a corresponding driving electrode for a current driving period when the driving code is set to a first value, and supplies a driving signal different from that of the previous driving period to the corresponding driving electrode for the current driving period when the driving code is set to a second value.