Touch detection method, touch detection circuit, touch chip and electronic device

A touch detection circuit, comprising:

• a synchronization signal controller, configured to receive a real-time synchronization signal sent by a touch display panel, and acquire a frequency of a noise signal in a working environment of a touch chip;
• a coding signal generator, configured to set a frequency of a coding drive signal based on the frequency of the noise signal, generate the coding drive signal based on the frequency of the coding drive signal, and output the coding drive signal to a drive electrode of the touch display panel;
• and
• a signal detection strobe, configured to generate a strobe signal based on the real-time synchronization signal, and receive a signal of a sensing electrode of the touch display panel, and output a detection result based on the strobe signal and the signal of the sensing electrode,
• wherein the synchronization signal controller is further configured to:
• detect intensities of the noise signals at each frequency in the working environment of the touch chip, and set the frequency of a noise signal whose intensity is lower than a preset intensity threshold in the detected noise signals to be the frequency of the coding drive signal.

A touch chip, comprising:

• the touch detection circuit, wherein the touch detection circuit comprises:
• a synchronization signal controller, configured to receive a real-time synchronization signal sent by a touch display panel, and acquire a frequency of a noise signal in a working environment of a touch chip;
• a coding signal generator, configured to set a frequency of a coding drive signal based on the frequency of the noise signal, generate the coding drive signal based on the frequency of the coding drive signal, and output the coding drive signal to a drive electrode of the touch display panel;
• and
• a signal detection strobe, configured to generate a strobe signal based on the real-time synchronization signal, and receive a signal of a sensing electrode of the touch display panel, and output a detection result based on the strobe signal and the signal of the sensing electrode,
• wherein the synchronization signal controller is further configured to:
• detect intensities of the noise signals at each frequency in the working environment of the touch chip, and set the frequency of a noise signal whose intensity is lower than a preset intensity threshold in the detected noise signals to be the frequency of the coding drive signal.