US 2018/0024654 A1 · METHOD IN WHICH ACTIVE STYLUS AND SENSOR CONTROLLER ARE USED, SYSTEM, SENSOR CONTROLLER, AND ACTIVE STYLUS

Abstract

A method in which a sensor controller is connected to a sensor having an electrode group provided together with a display panel configured to operate in during a variable refresh cycle among a plurality of refresh cycles, and an active stylus performs bidirectional communication with the sensor controller. According to the method, the sensor controller acquires a present refresh cycle among the plurality of refresh cycles of the display panel, generates an uplink signal, which serves as a reference for synchronization corresponding to the acquired present refresh cycle, and transmits the uplink signal to the active stylus, which is not detected as yet or is detected already, at the present refresh cycle.

Claims26

Dependent claims

A method in which a sensor controller connected to a sensor having an electrode group provided together with a display panel configured to operate in a variable refresh cycle among a plurality of refresh cycles, and an active stylus that performs bidirectional communication with the sensor controller are used, the method comprising:

acquiring, by the sensor controller, a present refresh cycle among the plurality of refresh cycles of the display panel;
generating, by the sensor controller, an uplink signal, which serves as a reference for synchronization corresponding to the acquired present refresh cycle;
and
transmitting the uplink signal to the active stylus, which is not detected as yet or is detected already, at the present refresh cycle.

1 more element

An active stylus that performs bidirectional communication with a sensor controller connected to a sensor having an electrode group provided together with a display panel configured to operate in a variable refresh cycle among a plurality of refresh cycles, the active stylus comprising:

a reception circuit that, in operation, receives from the sensor controller an uplink signal that serves as a reference for synchronization and that is transmitted repetitively at a present refresh cycle among the plurality of refresh cycles of the display panel;
and
a transmission circuit that, in operation, transmits a downlink signal to the sensor controller at a time point designated by the uplink signal.

Dependencies are inferred from the claim text.

Method in which active stylus and sensor controller are used, system, sensor controller, and active stylus

Life of this patent

Method in which active stylus and sensor controller are used, system, sensor controller, and active stylus

Life of this patent

Abstract

Claims26