Abstract: The present application discloses a capacitive screen, a method for its interaction with a stylus, and a storage medium. The capacitive screen includes a touch control chip and a screen coil. The touch chip generates a first current signal, which the screen coil, integrated as a metal coil, converts into a first electromagnetic signal. This signal is sent to the stylus, which then returns a second electromagnetic signal to the screen coil. The screen coil converts this into a second current signal for the touch chip, which calculates the distance between the screen and stylus. This invention enables real-time distance monitoring and interaction between the screen and stylus with low cost and power consumption.

Abstract: This application discloses a drive circuit, chip, and electronic device. The drive circuit includes an operational amplifier constant-current source circuit with an operational amplifier, a first switch coupled to the second node, a first resistor, and a second resistor; an H-bridge circuit with diagonally arranged second and fifth switches and third and fourth switches, configured to provide drive current to a motor; a switching circuit coupled to the second node, and control terminals of the second and third switches, configured to connect the second node to the control terminal of the second switch based on a valid first control signal, and/or to the control terminal of the third switch based on a valid second control signal; and a matching resistor coupled to the H-bridge circuit and ground voltage. This configuration provides stable and precise motor drive current even in high-frequency environments.

Abstract: The present application discloses a capacitive screen, a method for its interaction with a stylus, and a storage medium. The capacitive screen includes a touch control chip and a screen coil. The touch chip generates a first current signal, which the screen coil, integrated as a metal coil, converts into a first electromagnetic signal. This signal is sent to the stylus, which then returns a second electromagnetic signal to the screen coil. The screen coil converts this into a second current signal for the touch chip, which calculates the distance between the screen and stylus. This invention enables real-time distance monitoring and interaction between the screen and stylus with low cost and power consumption.