Active stylus
AssigneeWacom Co., Ltd.
InventorsHideyuki Hara, Nobutaka Ide, Yasuo Oda
Life of this patent
Estimating the term…
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; determine whether a pen tip of the active stylus is in contact with a sensor panel; responsive to determining that the pen tip is in contact with the sensor panel, transmit a pen pressure value of the pen tip; and responsive to determining that the pen tip is not in contact with the sensor panel, instead of transmitting the pen pressure value, detect an uplink signal transmitted from the sensor panel.
Claims18
An active stylus, comprising:
- at least one electrode;
- an integrated circuit coupled to the at least one electrode and configured to:
- operate in a first mode to unilaterally transmit signals to a sensor controller from one of the at least one electrode;
- determine whether a pen tip of the active stylus is in contact with a sensor panel;
- responsive to determining that the pen tip is in contact with the sensor panel, transmit a pen pressure value of the pen tip;
- and
- responsive to determining that the pen tip is not in contact with the sensor panel, instead of transmitting the pen pressure value, detect an uplink signal transmitted from the sensor panel.
A stylus integrated circuit, for use within an active stylus, the active stylus including at least one electrode, the stylus integrated circuit comprising:
- a memory;
- and
- a processor coupled to the memory and configured to:
- operate in a first mode to control unilateral transmission of signals to a sensor controller from one of the at least one electrode;
- determine whether a pen tip of the active stylus is in contact with a sensor panel;
- responsive to determining that the pen tip is in contact with the sensor panel, control transmission of a pen pressure value of the pen tip from the active stylus;
- and
- responsive to determining that the pen tip is not in contact with the sensor panel, instead of the transmission of the pen pressure value, control detection of an uplink signal transmitted from the sensor panel.
A method performed by an active stylus, comprising:
- operating in a first mode to unilaterally transmit signals to a sensor controller from one of at least one electrode of the active stylus;
- determining whether a pen tip of the active stylus is in contact with a sensor panel;
- responsive to determining that the pen tip is in contact with the sensor panel, transmitting a pen pressure value of the pen tip;
- and
- responsive to determining that the pen tip is not in contact with the sensor panel, instead of transmitting the pen pressure value, detecting an uplink signal transmitted from the sensor panel.
Dependencies are inferred from the claim text.