Patent ID: 11886656
Assignee: HIDEEP INC.
Field: Computer technology (Electrical engineering)
Classification: CPC G  H | IPC G

Claim 12:
13. A system comprising:
a stylus pen configured to include a resonance circuit having a resonance frequency; and
a touch sensor configured to search for the resonance frequency by increasing a frequency of a driving signal from a lower limit to an upper limit within a predetermined range of a reference frequency or decreasing the frequency of the driving signal from the upper limit to the lower limit within the predetermined range, and to transfer an electromagnetic signal having the resonance frequency to the stylus pen,
wherein the touch sensor is further configured to sequentially apply electromagnetic signals each having a frequency included in each of a plurality of first frequency sections divided by a first frequency unit during each of a plurality of time periods within a first period, and sequentially applies electromagnetic signals each having a frequency included in each of a plurality of second frequency sections divided by a second frequency unit to each of a plurality of time periods within a second period that is successive to the first period, and
wherein the first frequency unit is greater than the second frequency unit.