Abstract: Some embodiments of the present disclosure provide a method and a system for transmitting a signal, an active stylus, a touch screen and a readable storage medium. The method for transmitting a signal comprises: receiving a DSSS signal sent by the touch screen through a coupling capacitor formed between the active stylus and the touch screen, where the DSSS signal is a spread-spectrum coded signal to be transmitted; and parsing the received DSSS signal to obtain the signal to be transmitted. The method requires just a small amount of additional hardware resources and low power consumption, and can be well applied to an active stylus touch system.

Abstract: Some embodiments of the present disclosure provide a method and a system for transmitting a signal, an active stylus, a touch screen and a readable storage medium. The method for transmitting a signal comprises: receiving a DSSS signal sent by the touch screen through a coupling capacitor formed between the active stylus and the touch screen, where the DSSS signal is a spread-spectrum coded signal to be transmitted; and parsing the received DSSS signal to obtain the signal to be transmitted. The method requires just a small amount of additional hardware resources and low power consumption, and can be well applied to an active stylus touch system.

Abstract: A method for processing a signal from an active pen, and an active pen and a touch screen thereof are provided. The method includes: under-sampling a received excitation signal from the active pen with a predetermined sampling frequency to obtain a digital signal of the excitation signal from the active pen, and demodulating the digital signal of the excitation signal from the active pen to obtain a demodulated signal; and calculating touch coordinates according to an amplitude and a phase of the demodulated signal, and outputting the touch coordinates. Embodiments of the present application are intended to improve the signal processing precision of the active pen and improve the signal-to-noise ratio.

Abstract: A method for processing a signal from an active pen, and an active pen and a touch screen thereof are provided. The method includes: under-sampling a received excitation signal from the active pen with a predetermined sampling frequency to obtain a digital signal of the excitation signal from the active pen, and demodulating the digital signal of the excitation signal from the active pen to obtain a demodulated signal; and calculating touch coordinates according to an amplitude and a phase of the demodulated signal, and outputting the touch coordinates. Embodiments of the present application are intended to improve the signal processing precision of the active pen and improve the signal-to-noise ratio.