Sensor controller and active pen
AssigneeWacom Co., Ltd.
InventorHaruhiko Hisano
Life of this patent
Estimating the term…
Abstract
A sensor controller is connected to a sensor electrode to detect positions of one or more active pens depending on charge induced on the sensor electrode. The sensor controller includes a processor; and a memory coupled to the processor, the memory storing instructions that, when executed by the processor, cause the sensor controller to: detect that one or more active pens is approaching the sensor electrode using the sensor electrode; pair with the detected one or more active pens and update pairing state information indicative of a pairing state of each of the one or more active pens paired with the sensor controller; and broadcast the pairing state information from the sensor electrode to the one or more active pens via an uplink signal that is a reference for time synchronization.
Claims8
A sensor controller connected to a sensor electrode to detect positions of one or more active pens depending on charge induced on the sensor electrode, the sensor controller comprising:
- a processor;
- and
- a memory coupled to the processor, the memory storing instructions that, when executed by the processor, cause the sensor controller to:
- detect that the one or more active pens is approaching the sensor electrode, using the sensor electrode;
- pair with the detected one or more active pens;
- update pairing state information indicative of a pairing state of each of the one or more active pens paired with the sensor controller;
- and
- broadcast the pairing state information from the sensor electrode to the one or more active pens via an uplink signal that is a reference for time synchronization.
An active pen communicating with a sensor controller connected to a sensor electrode, the active pen comprising:
- a pen tip electrode;
- and
- an integrated circuit connected to the pen tip electrode,
- wherein the integrated circuit, in operation,
- detects, via a coupling capacitance between the pen tip electrode and the sensor electrode, an uplink signal including pairing state information indicative of a pairing state of each of one or more active pens with which the sensor controller is paired, and
- maintains or cancels a pairing state of the active stylus based on the pairing state information that has been detected, and in a case where the pairing state is maintained, transmits a downlink signal configured based on the pairing state of the active stylus.
An active pen communicating with a sensor controller connected to a sensor electrode, the active pen comprising:
- a pen tip electrode;
- an integrated circuit connected to the pen tip electrode;
- and
- an indicator,
- wherein the integrated circuit, in operation, controls the indicator to cause the indicator to provide a visual display that indicates a local pen identifier in a case where the local pen identifier is provided to the active pen by an uplink signal transmitted by the sensor controller.
Dependencies are inferred from the claim text.