The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 28, 2021
Filed:
Dec. 28, 2020
Wacom Co., Ltd., Saitama, JP;
Wacom Co., Ltd., Saitama, JP;
Abstract
An active stylus includes at least one electrode, and an integrated circuit coupled to the at least one electrode. The integrated circuit is configured to: operate in a first mode to unilaterally transmit signals to a sensor controller from one of the at least one electrode; attempt to detect an uplink signal from the sensor controller, using one of the at least one electrode, in a time period Tduring which the unilateral transmission of signals to the sensor controller is suspended; in response to not detecting the uplink signal, repeat operating in the first mode to unilaterally transmit signals to the sensor controller; and in response to detecting the uplink signal, stop operating in the first mode and transition to a second mode in which to transmit a downlink signal to the sensor controller, wherein the downlink signal is responsive to the uplink signal transmitted from the sensor controller.