Communication method executed between active pen and sensor controller, and active pen
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United States of America Patent
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Jun 14, 2022
Grant Date -
Jul 16, 2020
app pub date -
Mar 31, 2020
filing date -
Nov 29, 2017
priority date (Note) -
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status (Latency Note)
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Abstract
A sensor controller is provided which is capable of allocating time slots to multiple active pens in a timely manner according to functions of each active pen. The sensor controller, in operation, supplies a beacon signal, which serves as a reference time for a frame formed of a plurality of time slots; acquires, from a downlink signal returned from one of a first active pen including a pen tip electrode and a second active pen including a pen tip electrode and a peripheral electrode in response to the beacon signal, functional information indicating whether or not one of the active pens that has transmitted the downlink signal includes the peripheral electrode; and determines based on the acquired functional information whether to allocate one or more of the time slots to only the pen tip electrode or to each of the pen tip electrode and the peripheral electrode.
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