WIRELESS STYLUS

摘要

A wireless stylus includes a stylus tube, a pressure sensor circuit, a signal transmitting circuit and a control circuit. The stylus tube includes a head portion. The pressure sensor circuit outputs a sensed pressure value according to a contact pressure of the head portion. The control circuit controls the signal transmitting circuit to transmit a wireless signal with a first duty cycle when the sensed pressure value is smaller than a pre-set value, and the control circuit controls the signal transmitting circuit to transmit the wireless signal with a second duty cycle, which is shorter than the first duty cycle, when the sensed pressure value is larger than the pre-set value. Thereby, the wireless stylus transmits a wireless signal with lower power consumption when it is being touched.

主权项

1. A wireless stylus, comprising:
a stylus tube comprising a head portion; a pressure sensor circuit disposed in said stylus tube, said pressure sensor circuit outputting a sensed pressure value according to a contact pressure of said head portion; a signal transmitting circuit disposed in said stylus tube; and a control circuit disposed in said stylus tube, said control circuit being electrically connected to said pressure sensor circuit and said signal transmitting circuit; wherein said control circuit controls said signal transmitting circuit to transmit a wireless signal with a first duty cycle when said sensed pressure value is smaller than a pre-set value, and said control circuit controls said signal transmitting circuit to transmit said wireless signal with a second duty cycle when said sensed pressure value is larger than said pre-set value; and wherein said second duty cycle is shorter than said first duty cycle.