Touch display device and touch driving method of same

A touch display device, comprising:

• a plurality of interlaced sensing electrodes and driving electrodes located in N large groups;
• wherein the driving electrodes in a same large group carry driving signals having a same frequency, and the driving electrodes in different large groups carry driving signals having different frequencies;
• corresponding driving signals synchronously scan the driving electrodes in each of the large groups;
• sensing signals in the sensing electrodes are received for positioning touch positions;
• and
• a touch controller, wherein a waveform signal of a fixed frequency is output from driving signal pins of the touch controller, the fixed frequency is 240 KHz, driving signal pins of the touch controller corresponding to the driving electrodes in different large groups output waveform signals having different frequencies, and the different frequencies are 260 Khz and 280 Khz;
• wherein N is an integer not less than 2;
• wherein sensing signals of different groups have different frequencies and different phases, sensing signals of the same group have the same frequency and different phases, and the touch controller is configured to synchronously output the driving signals with different frequencies to a corresponding large group of driving electrodes.

A touch driving method of a touch display device, wherein the touch display device comprises a touch controller, sensing electrodes, and N large groups of driving electrodes;

• the touch driving method comprises:
• synchronously outputting, by the touch controller, driving signals with different frequencies to the driving electrodes corresponding to the large group;
• simultaneously receiving, by the touch controller, the sensing signals mixed with frequencies in the sensing electrodes;
• and
• calculating and reporting, by the touch controller, touch coordinates according to the frequencies and changes of the sensing signals;
• wherein a waveform signal of a fixed frequency is output from driving signal pins of the touch controller, the fixed frequency is 240 KHz, driving signal pins of the touch controller corresponding to the driving electrodes in different large groups output waveform signals having different frequencies, and the different frequencies are 260 Khz and 280 Khz;
• wherein N is an integer not less than 2;
• wherein sensing signals of different groups have different frequencies and different phases, sensing signals of the same group have the same frequency and different phases, and the touch controller is configured to synchronously output the driving signals with different frequencies to a corresponding large group of driving electrodes.