Abstract: A signal driving method is provided. The method includes, in a first signal driving period, applying non-inverting and inverting drive signals respectively to M adjacent and N adjacent detection electrodes, where M+N?P; and in a second signal driving period, applying the non-inverting and inverting drive signals respectively to K adjacent and L adjacent detection electrodes, where K+L?P. P denotes a number of detection electrodes not greater than a number of detection electrodes on a touch control screen. M, N, K and L adjacent detection electrodes are all part of the P detection electrodes. One signal driving cycle includes at least the first and second signal driving periods in which drive signals are applied to P detection electrodes. Each P detection electrode is applied a non-inverting drive signal at least once in one signal driving cycle, and phases of the inverting and non-inverting drive signals are opposite to each other by 180 degrees.

Abstract: A signal driving method is provided. One signal driving cycle includes two signal driving periods in which drive signals are applied to P detection electrodes. In a first period, applying non-inverting and inverting drive signals respectively to M adjacent detection electrodes and N adjacent detection electrodes. The non-inverting and inverting drive signals respectively applied to the M and N electrodes cancel each other out, M+N?P and |M-N|?Q. In a second period, applying the non-inverting and inverting drive signals respectively to K adjacent detection electrodes and L adjacent detection electrodes. The non-inverting and inverting drive signals respectively applied to the K and L electrodes cancel each other out, K+L?P, |K-L|?Q and M+K?P. Q denotes a number of detection electrodes which makes an active pen not cause moire after the cancelling, and P denotes a number of detection electrodes not greater than a number of detection electrodes on a touch control screen.

Abstract: A signal driving method is provided. One signal driving cycle includes two signal driving periods in which drive signals are applied to P detection electrodes. The method comprises, in a first period, applying non-inverting and inverting drive signals respectively to M adjacent detection electrodes and N adjacent detection electrodes. The non-inverting and inverting drive signals respectively applied to the M and N electrodes cancel each other out, M+N?P and |M?N|?Q. The method further comprises, in a second period, applying the non-inverting and inverting drive signals respectively to K adjacent detection electrodes and L adjacent detection electrodes. The non-inverting and inverting drive signals respectively applied to the K and L electrodes cancel each other out, K+L?P, |K?L|?Q and M+K?P.

Abstract: The present application provides a capacitance detection circuit, which could reduce the influence of screen noise on capacitance detection. The capacitance detection circuit includes: an amplification circuit connected to the capacitor to be detected, and configured to convert a capacitance signal of the capacitor to be detected into a voltage signal, the voltage signal being associated with the capacitance of the capacitor to be detected; and a control circuit connected to the amplification circuit, and configured to control an amplification factor of the amplification circuit to be a first amplification factor in a first period, and to control the amplification factor of the amplification circuit to be a second amplification factor in a second period, where noise generated by the screen in the first period is less than noise generated by the screen in the second period, and the first amplification factor is greater than the second amplification factor.

Abstract: A signal driving method is provided. One signal driving cycle includes two signal driving periods in which drive signals are applied to P detection electrodes. The method comprises, in a first period, applying non-inverting and inverting drive signals respectively to M adjacent detection electrodes and N adjacent detection electrodes. The non-inverting and inverting drive signals respectively applied to the M and N electrodes cancel each other out, M+N?P and |M?N|?Q. The method further comprises, in a second period, applying the non-inverting and inverting drive signals respectively to K adjacent detection electrodes and L adjacent detection electrodes. The non-inverting and inverting drive signals respectively applied to the K and L electrodes cancel each other out, K+L?P, |K?L|?Q and M+K?P.

Abstract: The present application provides a capacitance detection circuit, which could reduce the influence of screen noise on capacitance detection. The capacitance detection circuit includes: an amplification circuit connected to the capacitor to be detected, and configured to convert a capacitance signal of the capacitor to be detected into a voltage signal, the voltage signal being associated with the capacitance of the capacitor to be detected; and a control circuit connected to the amplification circuit, and configured to control an amplification factor of the amplification circuit to be a first amplification factor in a first period, and to control the amplification factor of the amplification circuit to be a second amplification factor in a second period, where noise generated by the screen in the first period is less than noise generated by the screen in the second period, and the first amplification factor is greater than the second amplification factor.

Abstract: A method and an apparatus for determining a control parameter of a cancellation branch, and a touch control detection apparatus are provided. The method includes: inputting a first constant signal to the cancellation branch, and inputting a first excitation signal to a self-capacitance detection branch, and performs differential processing for an output signal to obtain a first output signal; determining, based on the first output signal, a sum of phase delays; inputting a second constant signal to the self-capacitance detection branch, and inputting a second excitation signal to the cancellation branch, and performs differential processing for the output signal to obtain a second output signal; determining, based on the second output signal, a phase delay; and determining the control parameter of the cancellation branch based on the sum of phase delays and the phase delay.

Abstract: The present disclosure provides a touch detection chip and a touch screen detection method. The touch detection chip includes: a signal output unit configured to output a driving signal to a first channel of a touch screen; a first analog front end circuit, an inverting input end of which being connected to the first channel; a second analog front end circuit, an inverting input end of which being connected to a second channel of the touch screen; an impedance-adjustable circuit connected between a non-inverting input end of the first analog front end circuit and the signal output unit; a DC voltage unit connected to a non-inverting input end of the second analog front end circuit; and a processing unit separately connected to the signal output unit, the first analog front end circuit and the second analog front end circuit.

Abstract: The present disclosure provides a touch detection chip and a touch screen detection method. The touch detection chip includes: a signal output unit configured to output a driving signal to a first channel of a touch screen; a first analog front end circuit, an inverting input end of which being connected to the first channel; a second analog front end circuit, an inverting input end of which being connected to a second channel of the touch screen; an impedance-adjustable circuit connected between a non-inverting input end of the first analog front end circuit and the signal output unit; a DC voltage unit connected to a non-inverting input end of the second analog front end circuit; and a processing unit separately connected to the signal output unit, the first analog front end circuit and the second analog front end circuit.

Abstract: A method and an apparatus for determining a control parameter of a cancellation branch, and a touch control detection apparatus are provided. The method includes: inputting a first constant signal to the cancellation branch, and inputting a first excitation signal to a self-capacitance detection branch, and performs differential processing for an output signal to obtain a first output signal; determining, based on the first output signal, a sum of phase delays; inputting a second constant signal to the self-capacitance detection branch, and inputting a second excitation signal to the cancellation branch, and performs differential processing for the output signal to obtain a second output signal; determining, based on the second output signal, a phase delay; and determining the control parameter of the cancellation branch based on the sum of phase delays and the phase delay.