Patents by Inventor Masatoshi Yamai

Masatoshi Yamai 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: 10907993
    Abstract: A gear position detection device for detecting a gear having multiple fingers is provided. The detection device includes a substrate, a control chip, and a drive line, a sense line, a first drive electrode, a second drive electrode, a first sense electrode and a second sense electrode formed on the substrate. The first and second drive electrodes are connected to the drive line to receive a drive signal. The first and second sense electrodes form induced electric field respectively with the first and second drive electrodes, and respectively output a first detected signal and a second detected signal via the sense line. The control chip outputs the drive signal via the drive line, receives the first and second detected signals via the sense line, calculate a differential signal between the first and second detected signals, and count a number of high levels of the differential signal to count a finger number.
    Type: Grant
    Filed: October 22, 2019
    Date of Patent: February 2, 2021
    Assignee: PIXART IMAGING INC.
    Inventor: Masatoshi Yamai
  • Publication number: 20200049529
    Abstract: A gear position detection device for detecting a gear having multiple fingers is provided. The detection device includes a substrate, a control chip, and a drive line, a sense line, a first drive electrode, a second drive electrode, a first sense electrode and a second sense electrode formed on the substrate. The first and second drive electrodes are connected to the drive line to receive a drive signal. The first and second sense electrodes form induced electric field respectively with the first and second drive electrodes, and respectively output a first detected signal and a second detected signal via the sense line. The control chip outputs the drive signal via the drive line, receives the first and second detected signals via the sense line, calculate a differential signal between the first and second detected signals, and count a number of high levels of the differential signal to count a finger number.
    Type: Application
    Filed: October 22, 2019
    Publication date: February 13, 2020
    Inventor: MASATOSHI YAMAI
  • Patent number: 10527460
    Abstract: A gear position detection device for detecting a gear having multiple fingers is provided. The detection device includes a substrate, a control chip, and a drive line, a sense line, a first drive electrode, a second drive electrode, a first sense electrode and a second sense electrode formed on the substrate. The first and second drive electrodes are connected to the drive line to receive a drive signal. The first and second sense electrodes form induced electric field respectively with the first and second drive electrodes, and respectively output a first detected signal and a second detected signal via the sense line. The control chip outputs the drive signal via the drive line, receives the first and second detected signals via the sense line, calculate a differential signal between the first and second detected signals, and count a number of high levels of the differential signal to count a finger number.
    Type: Grant
    Filed: November 7, 2017
    Date of Patent: January 7, 2020
    Assignee: PIXART IMAGING INC.
    Inventor: Masatoshi Yamai
  • Publication number: 20190137301
    Abstract: A gear position detection device for detecting a gear having multiple fingers is provided. The detection device includes a substrate, a control chip, and a drive line, a sense line, a first drive electrode, a second drive electrode, a first sense electrode and a second sense electrode formed on the substrate. The first and second drive electrodes are connected to the drive line to receive a drive signal. The first and second sense electrodes form induced electric field respectively with the first and second drive electrodes, and respectively output a first detected signal and a second detected signal via the sense line. The control chip outputs the drive signal via the drive line, receives the first and second detected signals via the sense line, calculate a differential signal between the first and second detected signals, and count a number of high levels of the differential signal to count a finger number.
    Type: Application
    Filed: November 7, 2017
    Publication date: May 9, 2019
    Inventor: Masatoshi YAMAI
  • Patent number: 9996169
    Abstract: There is provided a capacitive joystick device including a substrate, a fixed plate, a movable member, a plurality of elastic elements, a cone and an operation stick. The substrate includes a ground region and a capacitance sensing region. The fixed plate includes a first opening. The movable member includes a second opening. The elastic elements are symmetrically disposed between the fixed plate and the movable member. The cone is disposed between the movable member and the substrate, and includes a base, a vertex and a lateral surface. The base presses against the movable member. The vertex is disposed on the ground region of the substrate. The lateral surface is aligned with the capacitance sensing region of the substrate. The operation stick extends from the base of the cone and passes through the first opening and the second opening.
    Type: Grant
    Filed: May 29, 2015
    Date of Patent: June 12, 2018
    Assignee: PIXART IMAGING INC.
    Inventors: Masatoshi Yamai, Chi-Chieh Liao, Hung-Yu Lai
  • Publication number: 20160004333
    Abstract: There is provided a capacitive joystick device including a substrate, a fixed plate, a movable member, a plurality of elastic elements, a cone and an operation stick. The substrate includes a ground region and a capacitance sensing region. The fixed plate includes a first opening. The movable member includes a second opening. The elastic elements are symmetrically disposed between the fixed plate and the movable member. The cone is disposed between the movable member and the substrate, and includes a base, a vertex and a lateral surface. The base presses against the movable member. The vertex is disposed on the ground region of the substrate. The lateral surface is aligned with the capacitance sensing region of the substrate. The operation stick extends from the base of the cone and passes through the first opening and the second opening.
    Type: Application
    Filed: May 29, 2015
    Publication date: January 7, 2016
    Inventors: MASATOSHI YAMAI, CHI-CHIEH LIAO, HUNG-YU LAI
  • Patent number: 7742033
    Abstract: A backlight control system has a light source controlled by a control device; a light guide for introducing light from light source and supplying backlight from the back surface of liquid crystal panel; a light sensor for detecting part of the backlight; and means for feeding signals from light sensor back to control device. Liquid crystal panel comprises light sensor on the side of the glass substrate thereof opposite the side where drive elements are mounted. Light sensor detects light from the base side that has passed through glass substrate on the surface of glass substrate.
    Type: Grant
    Filed: February 28, 2006
    Date of Patent: June 22, 2010
    Assignee: Avago Technologies ECBU IP (Singapore) Pte. Ltd.
    Inventor: Masatoshi Yamai
  • Patent number: 7684029
    Abstract: In one embodiment, a sensed dataset includes data produced by a plurality of light sensors that have been exposed to a light environment. The data of the sensed dataset corresponds to different ranges of light, and at least a portion of one of the ranges of light is outside the visible (VIS) light spectrum. The sensed dataset is compared to a plurality of known datasets representative of known light environments, and at least one known dataset that is similar to the sensed dataset is identified. In response thereto, an indication of the sensed light environment is provided. Apparatus for implementing this and related methods is also disclosed. In some embodiments, the light sensors are ultraviolet, visible and infrared sensors, and the indication of the sensed light environment is used to control the color of data acquired by an image sensor, or the color of a display backlight.
    Type: Grant
    Filed: October 29, 2004
    Date of Patent: March 23, 2010
    Assignee: Avago Technologies General IP (Singapore) Pte. Ltd.
    Inventors: Wee-Sin Tan, Masatoshi Yamai, Deng-Peng Chen
  • Patent number: 7490828
    Abstract: In one aspect, an apparatus includes a receptacle for holding a stack of sheet media, an image sensor, and a sheet media edge detector. The image sensor generates image data in response to light received from a view encompassing edges of ones of the sheet media held in the receptacle. The sheet media edge detector detects edges of individual ones of the sheet media in the image data generated by the image sensor. In another aspect, a stack of sheet media is held. Image data is generated in response to light received from a view encompassing edges of ones of the sheet media in the stack. Edges of individual ones of the sheet media are detected in the image data.
    Type: Grant
    Filed: October 17, 2005
    Date of Patent: February 17, 2009
    Assignee: Avago Technologies ECBU IP (Singapore) Pte. Ltd.
    Inventors: Akihiro Machida, Masatoshi Yamai
  • Publication number: 20070085263
    Abstract: In one aspect, an apparatus includes a receptacle for holding a stack of sheet media, an image sensor, and a sheet media edge detector. The image sensor generates image data in response to light received from a view encompassing edges of ones of the sheet media held in the receptacle. The sheet media edge detector detects edges of individual ones of the sheet media in the image data generated by the image sensor. In another aspect, a stack of sheet media is held. Image data is generated in response to light received from a view encompassing edges of ones of the sheet media in the stack. Edges of individual ones of the sheet media are detected in the image data.
    Type: Application
    Filed: October 17, 2005
    Publication date: April 19, 2007
    Inventors: Akihiro Machida, Masatoshi Yamai
  • Publication number: 20060215099
    Abstract: A backlight control system has a light source controlled by a control device; a light guide for introducing light from light source and supplying backlight from the back surface of liquid crystal panel; a light sensor for detecting part of the backlight; and means for feeding signals from light sensor back to control device. Liquid crystal panel comprises light sensor on the side of the glass substrate thereof opposite the side where drive elements are mounted. Light sensor detects light from the base side that has passed through glass substrate on the surface of glass substrate.
    Type: Application
    Filed: February 28, 2006
    Publication date: September 28, 2006
    Inventor: Masatoshi Yamai
  • Publication number: 20060132454
    Abstract: In one embodiment, a touch detection system and method is achieved having high resolution by forming an integrated array of alternating emitters and detectors. Using integration techniques, the detectors can be made much larger than the emitters while the gaps between the emitters and detectors are maintained relatively small. Thus, high resolution is achieved without dramatically increasing the number of emitter/detector pairs. In one embodiment each array is positioned on an edge of a display such that the emitter of one array is lined up (on axis with) a detector of an opposing display. In one embodiment, the touch detection system and method operates to detect the amplitude of signals arriving from opposing arrays so as to precisely determine the location of a touched position. Off-axis scanning can be employed to increase sensitivity.
    Type: Application
    Filed: December 16, 2004
    Publication date: June 22, 2006
    Inventors: Deng-Peng Chen, Wee-Sin Tan, Kai-Koon Lee, Chee-Heng Wong, Soon-Lee Tan, Masatoshi Yamai, Pak-Hong Yee, Rani Saravanan, Seok Chan
  • Publication number: 20060092407
    Abstract: In one embodiment, a sensed dataset includes data produced by a plurality of light sensors that have been exposed to a light environment. The data of the sensed dataset corresponds to different ranges of light, and at least a portion of one of the ranges of light is outside the visible (VIS) light spectrum. The sensed dataset is compared to a plurality of known datasets representative of known light environments, and at least one known dataset that is similar to the sensed dataset is identified. In response thereto, an indication of the sensed light environment is provided. Apparatus for implementing this and related methods is also disclosed. In some embodiments, the light sensors are ultraviolet, visible and infrared sensors, and the indication of the sensed light environment is used to control the color of data acquired by an image sensor, or the color of a display backlight.
    Type: Application
    Filed: October 29, 2004
    Publication date: May 4, 2006
    Inventors: Wee-Sin Tan, Masatoshi Yamai, Deng-Peng Chen