Patents by Inventor Sadao Yamamoto

Sadao Yamamoto has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20180018031
    Abstract: A method is provided for using an active stylus and a sensor controller that engage in two-way communication with each other. The sensor controller sends a beacon signal BS indicating reference time of a frame F. After detecting the beacon signal BS, the active stylus sends, included in a response signal to the beacon signal BS, a hash value CP_Hash associated with capability information indicating the type of one or more pieces of interactive data DF that can be obtained by the active stylus. The active stylus periodically sends data signals DF1,DF2, and so on, which include at least part of the one or more pieces of interactive data DF and which are configured in a format determined based on the one or more pieces of interactive data DF.
    Type: Application
    Filed: September 26, 2017
    Publication date: January 18, 2018
    Inventors: David Charles Fleck, Sadao Yamamoto
  • Patent number: 9851819
    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.
    Type: Grant
    Filed: May 1, 2017
    Date of Patent: December 26, 2017
    Assignee: Wacom Co., Ltd.
    Inventors: David Charles Fleck, Sadao Yamamoto
  • Publication number: 20170308186
    Abstract: A sensor controller can be used with both a first stylus that operates in a first communication mode and a second stylus that operates in a second communication mode. The sensor controller performs a dual mode discovery process in which a first discovery process and a second discovery process are alternately performed. During the first discovery process, the sensor controller transmits a search signal for detecting the first stylus. During the second discovery process, the sensor controller performs processing to detect a signal transmitted by the second stylus. When a response to the search signal that is transmitted by the first stylus is detected, an operating mode of the sensor controller is determined to be the first mode. When the signal transmitted by second stylus is detected, the operating mode of the sensor controller is determined to be the second mode.
    Type: Application
    Filed: July 13, 2017
    Publication date: October 26, 2017
    Inventor: Sadao Yamamoto
  • Patent number: 9785262
    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 defines data frames consisting of more than one time slot usable for receiving packets from the stylus. The active stylus transmits, in response to a request from the sensor controller, a signal including stylus capability information. The sensor controller determines, based on the stylus capability information, a downlink time slot allocation for use by the active stylus to transmit packets to the sensor controller. The sensor controller transmits the downlink time slot allocation to the active stylus.
    Type: Grant
    Filed: March 14, 2016
    Date of Patent: October 10, 2017
    Assignee: Wacom Co., Ltd.
    Inventors: David Charles Fleck, Sadao Yamamoto
  • Publication number: 20170285772
    Abstract: A single position indicator that can be used with a plurality of different types of position detection systems. The position indicator includes a communication circuit which, in operation, communicates with an outer device, a configuration circuit which, in operation, performs an initial setting process based on a signal from the outer device, a signal generation circuit which, in operation, generates a stylus position signal, and a control circuit. The control circuit, in operation, controls transmission of the stylus position signal based on an initial setting of at least one switch circuit that is set by the initial setting process performed by the configuration circuit, and controls reception of a signal received from the outer device via the communication circuit.
    Type: Application
    Filed: June 19, 2017
    Publication date: October 5, 2017
    Inventor: Sadao Yamamoto
  • Publication number: 20170235384
    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.
    Type: Application
    Filed: May 1, 2017
    Publication date: August 17, 2017
    Inventors: David Charles Fleck, Sadao Yamamoto
  • Publication number: 20170228049
    Abstract: A position indicator that can be used with a plurality of types of position detection systems. The position indicator includes a first transmitter, a second transmitter, an input circuit which, in operation, accepts an input from outside of the position indicator, a signal generation circuit which, in operation, generates a position detecting signal, a plurality of additional information generation circuits which, in operation, generate a plurality of types of additional information, and a controller. The controller controls, based on the input accepted by the input circuit, transmission of the position detecting signal through the first transmitter and controls, based on the input accepted by the input circuit, transmission of additional information generated by the plurality of additional information generation circuits from the first transmitter or the second transmitter.
    Type: Application
    Filed: April 24, 2017
    Publication date: August 10, 2017
    Inventor: Sadao Yamamoto
  • Publication number: 20170177145
    Abstract: A touch panel has a plurality of conductors arranged for a position detection area and can detect a position pointed to by an active stylus held by a user and a manual touch by the user holding the active stylus. The touch panel includes: a signal transmission circuit that transmits, by capacitive coupling, a signal to the active stylus that can receive the signal transmitted from the touch panel by capacitive coupling with the touch panel; an active stylus pointing position detection circuit that detects the position pointed to by the active stylus by capacitive coupling with the active stylus; a touch detection circuit that detects the manual touch by the user; and a coupling control circuit that performs coupling control to couple one or more of the plurality of conductors and a ground of the touch panel in accordance with a touch detection result of the touch detection circuit.
    Type: Application
    Filed: November 14, 2016
    Publication date: June 22, 2017
    Inventors: Hideyuki Hara, Sadao Yamamoto, Susumu Yamada
  • Patent number: 9639183
    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.
    Type: Grant
    Filed: March 14, 2016
    Date of Patent: May 2, 2017
    Assignee: Wacom Co., Ltd.
    Inventors: David Charles Fleck, Sadao Yamamoto
  • Patent number: 9632599
    Abstract: A position detection apparatus of the electrostatic coupling type is provided, to detect not only a position of a pointer but also information other than the position information such as, for example, pointer pressure or side switch information. The pointer transmits two codes such that a pressure applied to a pen tip is associated with a time difference between the two codes. A position detector carries out a correlation matching operation between signals generated in reception conductors and correlation calculation codes corresponding to the two codes, to thereby detect a position on a sensor section pointed to by the pointer from a result of the correlation matching operation and based on at least one of the codes.
    Type: Grant
    Filed: November 14, 2014
    Date of Patent: April 25, 2017
    Assignee: Wacom Co., Ltd.
    Inventors: Yasuo Oda, Sadao Yamamoto, Yoshihisa Sugiyama
  • Patent number: 9606640
    Abstract: A position detection apparatus of the electrostatic coupling type is provided, to detect not only a position of a pointer but also information other than the position information such as, for example, pointer pressure or side switch information. The pointer transmits two codes such that a pressure applied to a pen tip is associated with a time difference between the two codes. A position detector carries out a correlation matching operation between signals generated in reception conductors and correlation calculation codes corresponding to the two codes, to thereby detect a position on a sensor section pointed to by the pointer from a result of the correlation matching operation and based on at least one of the codes.
    Type: Grant
    Filed: November 14, 2014
    Date of Patent: March 28, 2017
    Assignee: Wacom Co., Ltd.
    Inventors: Yasuo Oda, Sadao Yamamoto, Yoshihisa Sugiyama
  • Patent number: 9600096
    Abstract: A position detecting device includes a sensor having electrodes that receive an alternating current (AC) signal from a capacitive stylus pen that transmits the AC signal. The position detecting device detects a position indicated by the stylus pen on the sensor. The position detecting device also includes: an electrode selection circuit that selects electrodes provided in the sensor for connection to a positive terminal and a negative terminal; a differential amplifier that amplifies and outputs a signal indicating a difference between signals generated at the positive terminal and the negative terminal; a height detector that obtains a height of the stylus pen relative to a sensor surface of the sensor; and a control unit that causes a selection pattern of the electrodes selected for connection to the positive terminal and the negative terminal by the electrode selection circuit to change according to the height obtained by the height detector.
    Type: Grant
    Filed: June 5, 2015
    Date of Patent: March 21, 2017
    Assignee: Wacom Co., Ltd.
    Inventors: Yuji Katsurahira, Sadao Yamamoto
  • Patent number: 9529456
    Abstract: A position detection apparatus of the electrostatic coupling type is provided, to detect not only a position of a pointer but also information other than the position information such as, for example, pointer pressure or side switch information. The pointer transmits two codes such that a pressure applied to a pen tip is associated with a time difference between the two codes. A position detector carries out a correlation matching operation between signals generated in reception conductors and correlation calculation codes corresponding to the two codes, to thereby detect a position on a sensor section pointed to by the pointer from a result of the correlation matching operation and based on at least one of the codes.
    Type: Grant
    Filed: November 14, 2014
    Date of Patent: December 27, 2016
    Assignee: Wacom Co., Ltd.
    Inventors: Yasuo Oda, Sadao Yamamoto, Yoshihisa Sugiyama
  • Publication number: 20160306448
    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.
    Type: Application
    Filed: March 14, 2016
    Publication date: October 20, 2016
    Inventors: David Charles Fleck, Sadao Yamamoto
  • Publication number: 20160306447
    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 defines data frames consisting of more than one time slot usable for receiving packets from the stylus. The active stylus transmits, in response to a request from the sensor controller, a signal including stylus capability information. The sensor controller determines, based on the stylus capability information, a downlink time slot allocation for use by the active stylus to transmit packets to the sensor controller. The sensor controller transmits the downlink time slot allocation to the active stylus.
    Type: Application
    Filed: March 14, 2016
    Publication date: October 20, 2016
    Inventors: David Charles Fleck, Sadao Yamamoto
  • Patent number: 9448646
    Abstract: A method is provided for transmitting orientation data from an active stylus to a sensor controller, wherein the sensor controller is coupled to a sensor configured to receive input from the active stylus. In the method the active stylus transmits stylus capability information to the sensor controller, wherein the stylus capability information indicates one or more orientation sensors included in the active stylus, out of multiple orientation sensors that are respectively configured to measure multiple types of orientation data. The sensor controller, based on the received stylus capability information indicating the one or more orientation sensors included in the active stylus, requests the active stylus to transmit corresponding one or more types of orientation data measured by the one or more orientation sensors. The active stylus, in response to the request from the sensor controller, transmits the one or more types of orientation data.
    Type: Grant
    Filed: March 14, 2016
    Date of Patent: September 20, 2016
    Assignee: Wacom Co., Ltd.
    Inventors: David Charles Fleck, Sadao Yamamoto
  • Publication number: 20160162054
    Abstract: A position detection apparatus of the electrostatic coupling type is provided, to detect not only a position of a pointer but also information other than the position information such as, for example, pointer pressure or side switch information. The pointer transmits two codes such that a pressure applied to a pen tip is associated with a time difference between the two codes. A position detector carries out a correlation matching operation between signals generated in reception conductors and correlation calculation codes corresponding to the two codes, to thereby detect a position on a sensor section pointed to by the pointer from a result of the correlation matching operation and based on at least one of the codes.
    Type: Application
    Filed: February 18, 2016
    Publication date: June 9, 2016
    Inventors: Yasuo Oda, Sadao Yamamoto, Yoshihisa Sugiyama
  • Publication number: 20160077611
    Abstract: A position detecting device includes a sensor having electrodes that receive an alternating current (AC) signal from a capacitive stylus pen that transmits the AC signal. The position detecting device detects a position indicated by the stylus pen on the sensor. The position detecting device also includes: an electrode selection circuit that selects electrodes provided in the sensor for connection to a positive terminal and a negative terminal; a differential amplifier that amplifies and outputs a signal indicating a difference between signals generated at the positive terminal and the negative terminal; a height detector that obtains a height of the stylus pen relative to a sensor surface of the sensor; and a control unit that causes a selection pattern of the electrodes selected for connection to the positive terminal and the negative terminal by the electrode selection circuit to change according to the height obtained by the height detector.
    Type: Application
    Filed: June 5, 2015
    Publication date: March 17, 2016
    Inventors: Yuji KATSURAHIRA, Sadao YAMAMOTO
  • Patent number: 9235288
    Abstract: A pointer detection apparatus includes a conductor pattern formed of intersecting first and second conductors. A signal supplying circuit generates transmission signals each comprised of a first code and a second code having an equal code length and having a predetermined relationship to each other, and supplies the generated transmission signals to the first conductors. A signal detection circuit is connected to the second conductors and detects reception signals, at least one of which corresponds to a variation of capacitance between the conductor pattern and a pointer. A correlation arithmetic operation circuit calculates, for each of the reception signals, first and second correlation values between the reception signal and first and second correlation value arithmetic operation signals corresponding to the first and second codes, respectively. A synthesis circuit calculates, for each pair of the first and second correlation values, a synthesis correlation value, based on which the pointer is detected.
    Type: Grant
    Filed: November 22, 2011
    Date of Patent: January 12, 2016
    Assignee: Wacom Co., Ltd.
    Inventors: Sadao Yamamoto, Yasuo Oda, Yoshihisa Sugiyama
  • Patent number: 9001084
    Abstract: A position detecting device usable with a display having a display-surface side and a rear-surface side opposite to the front side is provided. The position detecting device includes a position indicator, a detector, and a driving coil. The detector is provided on the display-surface side of the display and is configured to detect signals transmitted from the position indicator. The driving coil is provided on the rear-surface side of the display and is configured to supply electric current to the position indicator.
    Type: Grant
    Filed: December 20, 2007
    Date of Patent: April 7, 2015
    Assignee: Wacom Co., Ltd.
    Inventor: Sadao Yamamoto