US 12,461,610 B2
Stylus and sensor control circuit
David Charles Fleck, Vancouver, WA (US); and Sadao Yamamoto, Tokyo (JP)
Assigned to Wacom Co., Ltd., Saitama (JP)
Filed by Wacom Co., Ltd., Saitama (JP)
Filed on Jun. 13, 2024, as Appl. No. 18/743,000.
Application 18/743,000 is a continuation of application No. 17/848,897, filed on Jun. 24, 2022, granted, now 12,061,754.
Application 17/848,897 is a continuation of application No. 17/316,456, filed on May 10, 2021, granted, now 11,397,480, issued on Jul. 26, 2022.
Application 17/316,456 is a continuation of application No. 16/502,225, filed on Jul. 3, 2019, granted, now 11,003,260, issued on May 11, 2021.
Claims priority of provisional application 62/716,536, filed on Aug. 9, 2018.
Prior Publication US 2024/0329760 A1, Oct. 3, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. G06F 3/0354 (2013.01); G06F 3/038 (2013.01)
CPC G06F 3/03545 (2013.01) [G06F 3/0383 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A stylus that receives an uplink signal from an external sensor control circuit and transmits a downlink signal in response to the uplink signal, the stylus comprising:
a first electrode provided on a first portion of the stylus;
a second electrode provided on a second portion of the stylus different from the first portion of the stylus; and
a control circuit that, in operation, controls transmission of the downlink signal,
wherein the control circuit, in operation, determines a grasping state of the stylus based on the uplink signal,
wherein the control circuit, in response to determining the grasping state of the stylus, switches the stylus between a first mode and a second mode,
wherein in the first mode, the downlink signal is transmitted from the first electrode and the downlink signal is not transmitted from the second electrode,
wherein in the second mode, the downlink signal is not transmitted from the first electrode and the downlink signal is transmitted from the second electrode,
wherein the control circuit, in operation, determines the grasping state of the stylus based on data contained in the uplink signal,
wherein the data includes an identifier corresponding to the first electrode or the second electrode, and
wherein the control circuit, in operation, selects the first mode or second mode according to the identifier.