Abstract: A method to be performed by a sensor controller that periodically transmits an uplink signal, and by a stylus that, upon receiving the uplink signal, determines a transmission and reception schedule for a downlink signal and the uplink signal on the basis of the reception timing of the uplink signal. The method includes executing, by the stylus, an uplink signal receiving operation for a first predetermined period of time according to the transmission and reception schedule. The method includes, responsive to the uplink signal not received through the receiving operation and expiration of the first predetermined period of time, continuing, by the stylus, the uplink signal receiving operation for a second predetermined period of time, instead of transmitting the downlink signal according to the transmission and reception schedule.

Abstract: An active pen communicates with a sensor controller using a series of time slots, to receive uplink signals from and transmit downlink signals to the sensor controller. The series of time slots are determined based on the reception timing, by the active pen, of an uplink signal used as a reference time. The active pen determines whether or not the uplink signal is received and, if yes, the active pen transmits a first downlink signal using a time within the series of time slots. If no, the active pen transmits a second downlink signal using both a time within the series of time slots and a time outside the series of time slots. The second downlink signal is formed by repeating a unit signal that is shorter in duration than each of the series of time slots, to ensure reception by the sensor controller of at least one unit signal.

Abstract: An active pen includes an integrated circuit that transmits a downlink signal through a first electrode and receives an uplink signal through a second electrode different from the first electrode. The active pen includes a stop filter inserted between the second electrode and the integrated circuit. The integrated circuit, in operation, performs transmission of the downlink signal and the reception of the uplink signal at the same time.

Abstract: A method to be performed by a sensor controller that periodically transmits an uplink signal, and by a stylus that, upon receiving the uplink signal, determines a transmission and reception schedule for a downlink signal and the uplink signal on the basis of the reception timing of the uplink signal. The method includes executing, by the stylus, an uplink signal receiving operation for a first predetermined period of time according to the transmission and reception schedule. The method includes, responsive to the uplink signal not received through the receiving operation and expiration of the first predetermined period of time, continuing, by the stylus, the uplink signal receiving operation for a second predetermined period of time, instead of transmitting the downlink signal according to the transmission and reception schedule.

Abstract: Disclosed herein is an active stylus that transmits and receives signals to and from an electronic device, the active stylus including a receiver which, in operation, receives an uplink signal transmitted from the electronic device, a transmitter which, in operation, transmits a downlink signal to the electronic device, a power receiver which, in operation, receives power wirelessly supplied from the electronic device, and an integrated circuit. When the power is not being supplied to the power receiver, the integrated circuit causes the transmitter to transmit the downlink signal in response to the receiver receiving the uplink signal. The integrated circuit stops transmission of the downlink signal by the transmitter in response to detecting that supply of the power supply to the power receiver has started.

Abstract: An active pen is provided, which facilitates avoiding complex computation for phase acquisition on the side of a sensor integrated circuit configured to receive downlink signals from active pens, and allows for generating carrier waves for the downlink signals using a simple configuration, namely, a frequency dividing circuit, while reducing a difference in unused time in one time slot between the active pens. An active pen 2 is configured to transmit one or more symbol values in one time slot, and includes a frequency dividing circuit 43 configured to frequency-divide a reference clock with a frequency division ratio based on each of a plurality of frequencies different from each other, to thereby generate a plurality of carrier waves having frequencies different from each other.

Abstract: Active pen includes first and second electrodes provided at different positions, a transmission circuit that uses a booster circuit to cause a change in the first electrode to thereby transmit a downlink signal, a reception circuit that uses the second electrode to detect an uplink signal, and a stop filter that prevents a change in a potential of the first electrode from affecting a potential of the uplink signal detected by the reception circuit.

Abstract: An image arrangement determination apparatus, a display controlling apparatus, an image arrangement determination method, a display controlling method, and a program that can determine appropriate arrangement of an individual frame image with respect to a synthetic frame image according to a given standard are provided. A captured image acquisition section (60) acquires a plurality of images including a first image and a second image. A margin specification section (62) specifies a margin when the first image is arranged by a given first arrangement method in a region occupied by a third image that is a delivery target. An arrangement determination section (64) determines an arrangement method by which the second image is to be arranged in the margin as a second arrangement method based on a shape of the margin and a shape of the second image.

Abstract: A stylus is provided for use in conjunction with an electronic apparatus having a capacitance type touch sensor including a sensor electrode group disposed in a planar form. The stylus includes: a casing used to provide a reference potential; a first electrode; a second electrode different from the first electrode; a first receiving circuit grounded to the casing and configured to receive a transmission signal transmitted from the electronic apparatus via an electrostatic coupling formed between the first electrode and the sensor electrode group; a second receiving circuit grounded to the casing and configured to receive the transmission signal transmitted from the electronic apparatus via an electrostatic coupling formed between the second electrode and the sensor electrode group; and a control circuit configured to perform reception control of the first receiving circuit and the second receiving circuit.

Abstract: An active pen is provided, which facilitates avoiding complex computation for phase acquisition on the side of a sensor integrated circuit configured to receive downlink signals from active pens, and allows for generating carrier waves for the downlink signals using a simple configuration, namely, a frequency dividing circuit, while reducing a difference in unused time in one time slot between the active pens. An active pen 2 is configured to transmit one or more symbol values in one time slot, and includes a frequency dividing circuit 43 configured to frequency-divide a reference clock with a frequency division ratio based on each of a plurality of frequencies different from each other, to thereby generate a plurality of carrier waves having frequencies different from each other.

Abstract: A method of palm rejection is executed by a sensor controller that is connected to a plurality of sensor electrodes and that detects a downlink signal transmitted from an active pen. The method includes determining whether or not a phase of the detected downlink signal matches a phase shared in advance between the sensor controller and the active pen, and outputting, when it is determined that the phases match, a position of the active pen derived on the basis of a distribution of levels of the downlink signal in the plurality of sensor electrodes.

Abstract: Active pen includes first and second electrodes provided at different positions, a transmission circuit that uses a booster circuit to cause a change in the first electrode to thereby transmit a downlink signal, a reception circuit that uses the second electrode to detect an uplink signal, and a stop filter that prevents a change in a potential of the first electrode from affecting a potential of the uplink signal detected by the reception circuit.

Abstract: A processor of a stylus according to the present disclosure detects a first signal supplied to a sensor electrode group in each frame. The processor determines whether the first signal represents a setting instruction of a local ID, and writes a value of the local ID specified by the setting instruction in a memory if the first signal is determined to represent the setting instruction. The processor repeatedly detects a second signal supplied to the sensor electrode group in each of one or more slots included in the frame. The processor compares values of a local ID included in the detected second signal and the local ID stored in the memory every time the processor detects the second signal, and transmits a first downlink signal to a sensor controller using an electrode if the values correspond with each other.

Abstract: A method to be performed by a sensor controller that periodically transmits an uplink signal, and by a stylus that, upon receiving the uplink signal, determines a transmission and reception schedule for a downlink signal and the uplink signal on the basis of the reception timing of the uplink signal. The method includes executing, by the stylus, an uplink signal receiving operation for a first predetermined period of time according to the transmission and reception schedule. The method includes, responsive to the uplink signal not received through the receiving operation and expiration of the first predetermined period of time, continuing, by the stylus, the uplink signal receiving operation for a second predetermined period of time, instead of transmitting the downlink signal according to the transmission and reception schedule.

Abstract: A position detection system is provided including an electronic pen including M (M is a natural number) pen electrodes, and a sensor control circuit that is connected to a capacitance touch sensor including N (N is an integer equal to or greater than 2) sensor electrodes. The sensor control circuit controls transmission of uplink signals through the touch sensor. The electronic pen selects one or more reception electrodes from the M pen electrodes, and the sensor control circuit selects transmission electrodes that are L sensor electrodes satisfying 1<L<N from the N sensor electrodes. A set of the transmission electrodes and the reception electrodes of the uplink signals is changed according to time.

Abstract: A processor of a stylus according to the present disclosure detects a first signal supplied to a sensor electrode group in each frame. The processor determines whether the first signal represents a setting instruction of a local ID, and writes a value of the local ID specified by the setting instruction in a memory if the first signal is determined to represent the setting instruction. The processor repeatedly detects a second signal supplied to the sensor electrode group in each of one or more slots included in the frame. The processor compares values of a local ID included in the detected second signal and the local ID stored in the memory every time the processor detects the second signal, and transmits a first downlink signal to a sensor controller using an electrode if the values correspond with each other.

Abstract: An image arrangement determination apparatus, a display controlling apparatus, an image arrangement determination method, a display controlling method, and a program that can determine appropriate arrangement of an individual frame image with respect to a synthetic frame image according to a given standard are provided. A captured image acquisition section (60) acquires a plurality of images including a first image and a second image. A margin specification section (62) specifies a margin when the first image is arranged by a given first arrangement method in a region occupied by a third image that is a delivery target. An arrangement determination section (64) determines an arrangement method by which the second image is to be arranged in the margin as a second arrangement method based on a shape of the margin and a shape of the second image.

Abstract: A stylus is provided for use in conjunction with an electronic apparatus having a capacitance type touch sensor including a sensor electrode group disposed in a planar form. The stylus includes: a casing used to provide a reference potential; a first electrode; a second electrode different from the first electrode; a first receiving circuit grounded to the casing and configured to receive a transmission signal transmitted from the electronic apparatus via an electrostatic coupling formed between the first electrode and the sensor electrode group; a second receiving circuit grounded to the casing and configured to receive the transmission signal transmitted from the electronic apparatus via an electrostatic coupling formed between the second electrode and the sensor electrode group; and a control circuit configured to perform reception control of the first receiving circuit and the second receiving circuit.

Abstract: An active pen is provided, which facilitates avoiding complex computation for phase acquisition on the side of a sensor integrated circuit configured to receive downlink signals from active pens, and allows for generating carrier waves for the downlink signals using a simple configuration, namely, a frequency dividing circuit, while reducing a difference in unused time in one time slot between the active pens. An active pen 2 is configured to transmit one or more symbol values in one time slot, and includes a frequency dividing circuit 43 configured to frequency-divide a reference clock with a frequency division ratio based on each of a plurality of frequencies different from each other, to thereby generate a plurality of carrier waves having frequencies different from each other.

Abstract: An active pen that is used together with a sensor controller includes: an electrode provided at a pen tip, a memory that stores identification data, and a processor connected to the electrode and the memory. The processor returns, as a response to a first uplink signal transmitted from the sensor controller, a response signal including the identification data stored by the memory, and decides, based on whether data corresponding to the identification data is included in a second uplink signal received after the response signal is transmitted, whether the active pen is detected by the sensor controller.