System and method for bidirectional communication between stylus and stylus sensor controller
AssigneeWacom Co., Ltd.
InventorsDavid Charles Fleck, Sadao Yamamoto
Life of this patent
Estimating the term…
Abstract
A method is provided to interface an active stylus with a sensor controller, wherein the sensor controller is coupled to a sensor configured to receive input from the active stylus. In the method the sensor controller caches stylus capability information of the active stylus. The stylus capability information includes setting information for inking used by an application program executed to display input from the active stylus on the sensor. The active stylus generates a hash value of the stylus capability information and transmits the hash value to the sensor controller when the active stylus enters a sensing zone of the sensor controller.
Claims20
A method for an active stylus and a sensor controller to interact with each other, via a sensor coupled to the sensor controller and configured to receive input from the active stylus, the method comprising:
- the sensor controller transmitting an uplink signal in a time slot of a plurality of time slots included in a frame, wherein the uplink signal includes a command for the active stylus to transmit a first type of data;
- and
- the active stylus, in response to receiving the command, transmits the first type of data in downlink signals in time slots at equal time intervals T, repeatedly, in the frame.
A sensor controller for interacting with an active stylus, via a sensor coupled to the sensor controller and configured to receive input from the active stylus, the sensor controller comprising:
- a memory including computer-executable instructions, and
- circuitry, which is communicably coupled to the memory and which, in operation,
- transmits an uplink signal in a time slot of a plurality of time slots included in a frame, wherein the uplink signal includes a command for the active stylus to transmit a first type of data;
- and
- receives the first type of data from the active stylus in downlink signals in time slots at equal time intervals T, repeatedly, in the frame.
An active stylus for interacting with a sensor controller, via a sensor coupled to the sensor controller and configured to receive input from the active stylus, the active stylus comprising:
- a memory including computer-executable instructions, and
- circuitry, which is communicably coupled to the memory and which, in operation,
- receives an uplink signal in a time slot of a plurality of time slots included in a frame, wherein the uplink signal includes a command for the active stylus to transmit a first type of data;
- and
- in response to receiving the command, transmits the first type of data in downlink signals in time slots at equal time intervals T, repeatedly, in the frame.
Dependencies are inferred from the claim text.