TOUCH PEN

摘要

A touch pen includes a power supply circuit, a signal-receiving electrode, a noise-sensing electrode, an inverted amplifying circuit, and a signal-emitting electrode. The power supply circuit provides the touch pen with a working voltage, the signal-receiving electrode receiving at least one surface signal of a touch-sensing electrode structure of a capacitive touch-sensitive device, and the noise-sensing electrode receives at least one ambient noise signal. The inverted amplifying circuit reversely amplifies a difference between the surface signal and the ambient noise signal to generate a reversely amplified signal, and the signal-emitting electrode emits the reversely amplified signal to attenuate a detection signal of the capacitive touch-sensitive device in a position coinciding with a touch point of the touch pen.

主权项

1. A touch pen, comprising:
a power supply circuit for providing the touch pen with a working voltage; a signal-receiving electrode for receiving at least one surface signal of a touch-sensing electrode structure of a capacitive touch-sensitive device; a noise-sensing electrode for receiving at least one ambient noise signal; an inverted amplifying circuit for reversely amplifying a difference between the surface signal and the ambient noise signal to generate a reversely amplified signal; and a signal-emitting electrode for emitting the reversely amplified signal to attenuate a detection signal of the capacitive touch-sensitive device in a position coinciding with a touch point of the touch pen.