WIRELESS STYLUS
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United States of America Patent
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Issued Date -
Mar 23, 2017
app pub date -
Nov 24, 2015
filing date -
Sep 18, 2015
priority date (Note) -
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Abstract
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.
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