Sensor controller and pen
AssigneeWacom Co., Ltd.
InventorHaruhiko Hisano
Life of this patent
Estimating the term…
Abstract
A change of a resource allocation scheme in a multi-pen supporting electronic apparatus can be made in a shorter period of time than in the prior art. A sensor controller 50 assigns communication resources to one or more pens 2, respectively, and detects a position of each of the one or more pens 2 on the basis of a downlink signal DS received from each of the one or more pens 2 using the assigned communication resources. When changing a resource allocation scheme, which indicates a structure of the communication resources or a method of using the communication resources, the sensor controller 50 broadcasts information indicating a new resource allocation scheme to the one or more pens 2.
Claims6
A sensor controller comprising a processor and a memory configured to:
- detect a position of a pen by receiving a downlink signal from the pen by using a receiving method,
- transmit an uplink signal indicating a change in a bit rate of the downlink signal to the pen, and
- change the receiving method for the downlink signal to a new receiving method corresponding to the bit rate after the change, wherein
- the uplink signal indicating the change in the bit rate of the downlink signal is a signal indicating a change in a symbol length of the downlink signal, and
- a reception window for detecting the downlink signal is changed according to the symbol length after the change.
A pen comprising a processor and a memory configured to:
- transmit a downlink signal to a sensor controller, and
- change a symbol length of the downlink signal in response to reception of an uplink signal indicating a change in the symbol length of the downlink signal from the sensor controller, wherein
- the uplink signal indicating the change in the symbol length of the downlink signal is a signal indicating a change in a bit rate of the downlink signal, and
- a reception window of the sensor controller for detecting the downlink signal from the pen is changed according to the symbol length after the change.
A sensor controller comprising a processor and a memory configured to:
- perform communication with one or more pens in units of a super-frame including a plurality of frames each including a plurality of time slots,
- transmit a start uplink signal including setting information applied to the entire super-frame by using a start frame located at a start among the plurality of frames, and
- in each of one or more succeeding frames as a frame other than the start frame among the plurality of frames, transmit a succeeding uplink signal indicating a reference time for the plurality of time slots arranged within the succeeding frame, wherein
- in each of the one or more succeeding frames, the sensor controller transmits the succeeding uplink signal at a timing moved forward or rearward by a time difference, for each succeeding frame, from a transmission timing determined from a temporal position of the super-frame.
A pen comprising a processor and a memory configured to:
- perform communication with a sensor controller in units of a super-frame including a plurality of frames each including a plurality of time slots,
- when an uplink signal received from the sensor controller is a start uplink signal including setting information applied to the entire super-frame, set the setting information in the memory, and
- when the uplink signal received from the sensor controller is a succeeding uplink signal indicating a reference time for the plurality of time slots arranged in one of one or more succeeding frames as a frame other than a start frame located at a start among the plurality of frames, obtain a temporal position of each time slot within the corresponding succeeding frame on the basis of a reception timing of the succeeding uplink signal, wherein
- the setting information includes division information indicating the number of the frames arranged within the super-frame, and
- the pen obtains the number of the frames arranged within the super-frame on the basis of the division information.
Dependencies are inferred from the claim text.