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).

  • Patent number: 11003260
    Abstract: A stylus includes a cylindrical housing, a tip portion provided on a tip side of the housing and including a tip electrode, a tail portion provided on a tail side of the housing and including a tail electrode, a power circuit provided in the housing, a first transmission circuit which, in operation, receives power from the power circuit and generates a first downlink signal that is transmitted toward an outside of the housing through the tip electrode, a second transmission circuit which, in operation, receives power from the power circuit and generates a second downlink signal that is transmitted toward the outside of the housing through the tail electrode, the second downlink signal being different from the first downlink signal, and a control circuit which, in operation, controls the first transmission circuit and the second transmission circuit according to a plurality of transmission modes.
    Type: Grant
    Filed: July 3, 2019
    Date of Patent: May 11, 2021
    Assignee: Wacom Co., Ltd.
    Inventors: David Charles Fleck, Sadao Yamamoto
  • Patent number: 11004330
    Abstract: A method carried out in a system including an active stylus and a sensor controller includes: transmitting, by the sensor controller, an uplink signal including a first partial signal and a second partial signal; and receiving, by the active stylus, the uplink signal. The transmitting includes transmitting the first partial signal by direct spreading using a first spread code and transmitting the second partial signal by direct spreading using a second spread code, wherein the second spread code is different from the first spread code and has a chip time length that is identical to a chip time length of the first spread code. The receiving includes, while the active stylus is synchronized with the uplink signal, detecting the first partial signal using the first spread code and subsequently detecting the second partial signal using the second spread code.
    Type: Grant
    Filed: September 30, 2020
    Date of Patent: May 11, 2021
    Assignee: Wacom Co., Ltd.
    Inventors: Sadao Yamamoto, Hideyuki Hara
  • Patent number: 10994246
    Abstract: Provided are an all-silica zeolite separation membrane for separating carbon dioxide, etc., and not causing a decrease in the processing amount due to adsorption of water molecules, and a production method therefor. One aspect of the present invention is a zeolite separation membrane, in which the framework of a zeolite crystal structure formed on a porous support is all silica, characterized in that the zeolite crystal structure formed on the porous support is fluorine free.
    Type: Grant
    Filed: February 17, 2017
    Date of Patent: May 4, 2021
    Assignees: HITACHI ZOSEN CORPORATION, THE SCHOOL CORPORATION KANSAI UNIVERSITY
    Inventors: Satoshi Imasaka, Masaya Itakura, Kazuhiro Yano, Hideki Yamamoto, Sadao Araki
  • Patent number: 10990224
    Abstract: A touch detection method is performed by a controller of a touch sensor of a capacitive type including sensor electrodes. The touch detection method includes acquiring detection values at crossing positions of the sensor electrodes, each detection value corresponding to a capacitance between an indicator and the touch sensor at one of the crossing positions, acquiring a maximum value among the detection values at the crossing positions, determining a first threshold value by subtracting a subtraction value, which is a fixed value or a value that decreases as the maximum value increases, from the maximum value, and deriving a position of the indicator based on the detection values at the crossing positions with reference to the first threshold value.
    Type: Grant
    Filed: February 21, 2018
    Date of Patent: April 27, 2021
    Assignee: Wacom Co., Ltd.
    Inventors: Yoshio Nomura, Kazuhiro Miyoshi, Sadao Yamamoto
  • Patent number: 10969914
    Abstract: A system includes a stylus and a sensor controller couplable to a sensor capable of detecting the stylus. The sensor controller is configured to continuously transmit, via the sensor, first uplink control signals (US_c1) during a continuous transmission period (TCP), which is longer than an interval (WPa) at which the stylus performs a reception operation Rx of an uplink signal from the sensor. The sensor controller is configured to, after the TCP, control a reception operation at the sensor of a downlink signal (DS) from the stylus during a reception period (RDS). The sensor controller is configured to, depending on a result of detection of the DS during the RDS, determine whether or not the stylus is detected by the sensor.
    Type: Grant
    Filed: April 20, 2020
    Date of Patent: April 6, 2021
    Assignee: Wacom Co., Ltd.
    Inventor: Sadao Yamamoto
  • Patent number: 10963108
    Abstract: A method implemented in a system for deriving a position of a pen on a sensor panel by transmitting and receiving signals via capacitive coupling between a pen tip electrode of the pen and the sensor panel, includes: transmitting a first signal indicating a reference time of one frame period via the sensor panel, from a sensor controller that performs a pen detecting operation only at one or more specific time periods in the one frame period; and transmitting a burst signal that does not include a data signal indicating an operating state of the pen, from the pen that has detected the first signal, at each of the one or more specific time periods in the frame period indicated by the first signal.
    Type: Grant
    Filed: January 23, 2020
    Date of Patent: March 30, 2021
    Assignee: Wacom Co., Ltd.
    Inventors: Sadao Yamamoto, Haruhiko Hisano
  • Publication number: 20210081060
    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: November 30, 2020
    Publication date: March 18, 2021
    Inventors: David Charles Fleck, Sadao Yamamoto
  • Publication number: 20210081075
    Abstract: A sensor controller is provided for use in a position detector for detecting a position of a position indicator on a touch surface. The sensor controller includes a microprocessor for outputting a value of a symbol to be sent to the position indicator. The sensor controller includes a transmitter coupled to the microprocessor for generating a transmission signal including a chip string CN1 produced by cyclically shifting a code string PNa having autocorrelation characteristics by a shift quantity based on the value of the symbol to be sent, and sending the generated transmission signal to the position indicator via the touch surface. A higher bit rate can be obtained for a given chip rate compared with the prior art in which only 1 bit can be expressed by one code string.
    Type: Application
    Filed: November 30, 2020
    Publication date: March 18, 2021
    Inventors: Yasuo Oda, Sadao Yamamoto
  • Publication number: 20210081059
    Abstract: A method of using an active stylus and a sensor controller is provided including generally four steps. The active stylus, in response to a trigger indicative of a pen lowering operation, sends replaceable pen tip information indicating a type of a replaceable pen tip that forms a pen tip of the active stylus. The sensor controller receives the replaceable pen tip information and identifies the replaceable pen tip type of the active stylus. The active stylus repeatedly sends a data signal including a pen pressure value applied to the replaceable pen tip. The sensor controller derives a position of the active stylus based on the data signal using a position deriving method that corresponds to the replaceable pen tip information.
    Type: Application
    Filed: November 12, 2020
    Publication date: March 18, 2021
    Inventors: Sadao Yamamoto, Yasuo Oda, Masahiko Yamada
  • Patent number: 10949035
    Abstract: A method is carried out by a stylus, wherein the stylus is a dual stylus configured to be capable of transmitting signals pursuant to both a first system and a second system and receiving at least a signal pursuant to the first system. The dual stylus has a detection function of detecting a writing pressure applied to a stylus (pen) tip. The method includes detecting contact between the stylus and a touch surface based on the writing pressure detected by the detection function, activating a signal reception operation pursuant to the first system for a predetermined time period, and, responsive to reception of a signal pursuant to the first system in the predetermined time period, setting an operation mode of the stylus to a first operation mode, in which signals are transmitted and received pursuant to the first system.
    Type: Grant
    Filed: December 20, 2018
    Date of Patent: March 16, 2021
    Assignee: Wacom Co., Ltd.
    Inventors: Hideyuki Hara, Sadao Yamamoto
  • Publication number: 20210064208
    Abstract: A method performed by a device (e.g., touch controller) includes deriving a pen position, and transmitting a report indicating the derived pen position to a host computer. The report includes a first area storing position data indicating the derived position and a second area storing non-position data different from the position data. The method includes securing a buffer area for retaining a plurality of the reports in a memory, deriving the pen position at each determined scanning time, and generating a report including the position data indicating the derived position. The method includes storing the report in the buffer area and, in response to obtaining the non-position data, writing the non-position data in the second area of each of one or more of the reports stored in the buffer area. The method includes transmitting the plurality of the reports stored in the buffer area to the host computer.
    Type: Application
    Filed: July 30, 2020
    Publication date: March 4, 2021
    Inventors: Sadao YAMAMOTO, Yoshio NOMURA
  • Publication number: 20210048900
    Abstract: A position indicator includes a pen-shaped body; control circuitry housed in the pen-shaped body and configured to generate position detection signals and generate additional information about the position indicator; a first receiver; a second receiver different from the first receiver; a first transmitter provided near a distal end of the pen-shaped body and configured to transmit the position detection signals to a sensor of a position detection system; and a second transmitter, which is different from the first transmitter and configured to transmit wireless signals to the position detection system. The control circuitry, in response to a control signal from the position detection system received by the first receiver or the second receiver, controls transmission of the position detection signals and transmission of the additional information via a transmitter selected from the first transmitter and the second transmitter, to the position detection system.
    Type: Application
    Filed: October 30, 2020
    Publication date: February 18, 2021
    Inventor: Sadao Yamamoto
  • Publication number: 20210011580
    Abstract: A method carried out in a system including an active stylus and a sensor controller includes: transmitting, by the sensor controller, an uplink signal including a first partial signal and a second partial signal; and receiving, by the active stylus, the uplink signal. The transmitting includes transmitting the first partial signal by direct spreading using a first spread code and transmitting the second partial signal by direct spreading using a second spread code, wherein the second spread code is different from the first spread code and has a chip time length that is identical to a chip time length of the first spread code. The receiving includes, while the active stylus is synchronized with the uplink signal, detecting the first partial signal using the first spread code and subsequently detecting the second partial signal using the second spread code.
    Type: Application
    Filed: September 30, 2020
    Publication date: January 14, 2021
    Inventors: Sadao Yamamoto, Hideyuki Hara
  • Patent number: 10866660
    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: Grant
    Filed: November 21, 2019
    Date of Patent: December 15, 2020
    Assignee: Wacom Co., Ltd.
    Inventor: Sadao Yamamoto
  • Patent number: 10860118
    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: Grant
    Filed: September 26, 2017
    Date of Patent: December 8, 2020
    Assignee: Wacom Co., Ltd.
    Inventors: David Charles Fleck, Sadao Yamamoto
  • Patent number: 10861323
    Abstract: A method carried out in a system having an active stylus and a sensor controller includes establishing frame synchronization between the controller and the stylus, selecting a first variable-length command from among multiple variable-length commands each including data of a variable number of bits, transmitting the first command in a first portion of a frame using an uplink signal having a variable time length that depends on a number of bits of the first command, receiving the uplink signal having the variable time length, detecting the first command by decoding the uplink signal up to a tail of the uplink signal, and transmitting a downlink signal that depends on the first command in a second portion of the first frame that is different from the first portion of the first frame.
    Type: Grant
    Filed: July 24, 2019
    Date of Patent: December 8, 2020
    Assignee: Wacom Co., Ltd.
    Inventors: Sadao Yamamoto, Hideyuki Hara
  • Patent number: 10852852
    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: November 25, 2019
    Date of Patent: December 1, 2020
    Assignee: Wacom Co., Ltd.
    Inventors: David Charles Fleck, Sadao Yamamoto
  • Patent number: 10852895
    Abstract: A sensor controller is provided for use in a position detector for detecting a position of a position indicator on a touch surface. The sensor controller includes a microprocessor for outputting a value of a symbol to be sent to the position indicator. The sensor controller includes a transmitter coupled to the microprocessor for generating a transmission signal including a chip string CN1 produced by cyclically shifting a code string PNa having autocorrelation characteristics by a shift quantity based on the value of the symbol to be sent, and sending the generated transmission signal to the position indicator via the touch surface. A higher bit rate can be obtained for a given chip rate compared with the prior art in which only 1 bit can be expressed by one code string.
    Type: Grant
    Filed: October 21, 2019
    Date of Patent: December 1, 2020
    Assignee: Wacom Co., Ltd.
    Inventors: Yasuo Oda, Sadao Yamamoto
  • Patent number: 10838518
    Abstract: A method of using an active stylus and a sensor controller is provided including generally four steps. The active stylus, in response to a trigger indicative of a pen lowering operation, sends refill body information indicating a type of a refill body that forms a pen tip of the active stylus. The sensor controller receives the refill body information and identifies the refill body type of the active stylus. The active stylus repeatedly sends a data signal including a pen pressure value applied to the refill body. The sensor controller derives a position of the active stylus based on the data signal using a position deriving method that corresponds to the refill body information.
    Type: Grant
    Filed: September 26, 2017
    Date of Patent: November 17, 2020
    Assignee: Wacom Co., Ltd.
    Inventors: Sadao Yamamoto, Yasuo Oda, Masahiko Yamada
  • Publication number: 20200348770
    Abstract: A controller of an in-cell type liquid crystal display device is provided. The controller controls first and second electrodes that intersect each other, supplies a pixel driving voltage to the first electrodes during a pixel driving period, and detects a stylus position using the first and second electrodes during a stylus detection period different from the pixel driving period. The controller transmits, using the second electrodes, a command requesting a transmission of a downlink signal to the stylus. The controller detects, using the first and second electrodes, the downlink signal transmitted from the stylus in response to the command, and detects the stylus position based on the detected downlink signal.
    Type: Application
    Filed: July 15, 2020
    Publication date: November 5, 2020
    Inventors: Hideyuki Hara, Sadao Yamamoto, Shunya Saito