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US 12,182,358 B2Granted
Synchronization method and controller thereof
AssigneeNovatek Microelectronics Corp.
InventorsShih-Ming Lin, Jiun-Jie Tsai
Life of this patent
Estimating the term…
Abstract
A synchronization method between an active stylus and a touch device includes determining whether the active stylus approaches the touch device; starting a timing configuration process after the touch device receives a response signal from the active stylus; and starting a timing calibration process after the timing configuration process is completed.
Claims19
A synchronization method, comprising:
- determining, by a first touch device, whether an active stylus approaches the first touch device;
- starting a timing configuration process after the first touch device receives a response signal from the active stylus;
- and
- starting a timing calibration process after the timing configuration process is completed, wherein the timing calibration process comprises transmitting, by the active stylus, a first calibration downlink signal according to a first timing parameter,
- wherein the first timing parameter is categorized as one of an uplink time length, an uplink period, an edge-to-edge time length, a downlink period, a downlink time length, or a downlink slot number,
- wherein the first timing parameter has been adjusted or is to be adjusted.
3 more elements
A control circuit, for a touch device, comprising:
- a processing circuit, configured to execute steps of:
- determining whether an active stylus approaches the touch device;
- starting a timing configuration process after the touch device receives a response signal from the active stylus;
- and
- starting a timing calibration process after the timing configuration process is completed, wherein the timing calibration process comprises transmitting, by the active stylus, a first calibration downlink signal according to a first timing parameter,
- wherein the first timing parameter is categorized as one of an uplink time length, an uplink period, an edge-to-edge time length, a downlink period, a downlink time length, or a downlink slot number,
- wherein the first timing parameter has been adjusted or is to be adjusted;
- and
- a storage circuit, coupled to the processing circuit.
6 more elements
A control circuit, for a computing device coupled to a touch device, comprising:
- a processing circuit, configured to execute steps of:
- instructing the touch device to start a timing configuration process after the touch device receives a response signal from an active stylus;
- and
- instructing the touch device to start a timing calibration process after the timing configuration process is completed, wherein the timing calibration process comprises transmitting, by the active stylus, a first calibration downlink signal according to a first timing parameter,
- wherein the first timing parameter is categorized as one of an uplink time length, an uplink period, an edge-to-edge time length, a downlink period, a downlink time length, or a downlink slot number,
- wherein the first timing parameter has been adjusted or is to be adjusted;
- and
- a storage circuit, coupled to the processing circuit.
5 more elements
A control circuit, for an active stylus, comprising:
- a processing circuit, configured to execute steps of:
- detecting a presence of a touch device;
- transmitting a response signal to the touch device to start a timing configuration process;
- and
- starting a timing calibration process after the timing configuration process is completed, wherein the timing calibration process comprises transmitting, by the active stylus, a first calibration downlink signal according to a first timing parameter,
- wherein the first timing parameter is categorized as one of an uplink time length, an uplink period, an edge-to-edge time length, a downlink period, a downlink time length, or a downlink slot number,
- wherein the first timing parameter has been adjusted or is to be adjusted;
- and
- a storage circuit, coupled to the processing circuit.
6 more elements
Dependencies are inferred from the claim text.