US 2021/0232239 A1 · STYLUS AND SENSOR CONTROLLER

Abstract

A stylus capable of bidirectionally communicating with a sensor controller includes a receiver that receives an uplink signal sent by the sensor controller, a controller that determines whether a signal having a predetermined waveform is to be continuously sent over a second time period or to be continuously sent over a first time period longer than the second time period, on the basis of the uplink signal, and a transmitter that continuously sends the signal having the predetermined waveform over the first time period or the second time period on the basis of the result of determination by the controller. As a result, the sensor controller can detect a burst signal from the stylus over a wide range in a sensor touch surface, to thereby reduce the possibility that the sensor controller may fail to detect the burst signal.

Claims18

Dependent claims

A sensor controller connected to an electrode matrix of M first electrodes extending in a first direction and N second electrodes extending in a second direction different from the first direction, the sensor controller being structured to carry out:

a finger touch detecting step of supplying a predetermined signal to the M first electrodes respectively and detecting a finger touch based on the predetermined signal detected in the N second electrodes respectively;
a full-range scanning step of detecting an undetected stylus and deriving positional coordinates of the stylus using at least part of the M first electrodes and at least part of the N second electrodes;
and
a sector scanning step of deriving positional coordinates of a detected stylus using fewer first electrodes than the first electrodes used in the full-range scanning step and fewer second electrodes than the second electrodes used in the full-range scanning step.

1 more element

A sensor comprising:

an electrode matrix of M first electrodes extending in a first direction and N second electrodes extending in a second direction different from the first direction, and
a sensor controller coupled to the electrode matrix and configured to carry out:
a finger touch detecting step of supplying a predetermined signal to the M first electrodes respectively and detecting a finger touch based on the predetermined signal detected in the N second electrodes respectively;
a full-range scanning step of detecting an undetected stylus and deriving positional coordinates of the stylus using at least part of the M first electrodes and at least part of the N second electrodes;
and
a sector scanning step of deriving positional coordinates of a detected stylus using fewer first electrodes than the first electrodes used in the full-range scanning step and fewer second electrodes than the second electrodes used in the full-range scanning step.

3 more elements

An electronic apparatus comprising:

a sensor formed of an electrode matrix of M first electrodes extending in a first direction and N second electrodes extending in a second direction different from the first direction, and
a sensor controller coupled to the electrode matrix and configured to carry out:
a finger touch detecting step of supplying a predetermined signal to the M first electrodes respectively and detecting a finger touch based on the predetermined signal detected in the N second electrodes respectively;
a full-range scanning step of detecting an undetected stylus and deriving positional coordinates of the stylus using at least part of the M first electrodes and at least part of the N second electrodes;
and
a sector scanning step of deriving positional coordinates of a detected stylus using fewer first electrodes than the first electrodes used in the full-range scanning step and fewer second electrodes than the second electrodes used in the full-range scanning step.

3 more elements

Dependencies are inferred from the claim text.

Stylus and sensor controller

Life of this patent

Stylus and sensor controller

Life of this patent

Abstract

Claims18