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Near field communications (NFC)-based active stylus

  • US 9,785,261 B2
  • Filed: 12/19/2014
  • Issued: 10/10/2017
  • Est. Priority Date: 12/19/2014
  • Status: Expired due to Fees
First Claim
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1. A stylus device comprising:

  • a coil antenna configured to detect presence of a magnetic field from another device, wherein the magnetic field facilitates;

    switching ON, power charging, and establishing of a near field communication (NFC) link with the other device;

    a NFC module configured to process a signal received through the established NFC link, wherein the received signal includes a particular frequency channel that is utilized to receive a displayed data during a touch-communication with the other device, the NFC module directs the coil antenna to operate at the particular frequency channel for touch-communications, wherein the touch communication operates in parallel with NFC communications between the stylus device and the other device;

    a processor coupled to the NFC module, configured to run a plurality of applications to control an operation of the stylus device; and

    a user interface coupled to the processor, configured to select the operation that correspond to the plurality of applications.

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