Patents by Inventor Kei Takahashi

Kei Takahashi 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: 11455940
    Abstract: A display device that inhibits display deterioration is provided. The display device estimates the amount of deterioration of a pixel included in the display device and corrects a first image signal supplied to the pixel. The display device includes a display panel including a plurality of pixels, a frame memory, and an arithmetic portion. The pixels each include a light-emitting element and a transistor supplying a current to the light-emitting element. The arithmetic portion has a function of performing an arithmetic operation in accordance with a regression model. A forecast error parameter and an output parameter are set in the arithmetic portion. The arithmetic portion updates the forecast error parameter from a first observation signal supplied from the frame memory and a second observation signal supplied from the pixel, in accordance with the regression model, and updates an output parameter by the forecast error parameter in accordance with the regression model.
    Type: Grant
    Filed: May 27, 2019
    Date of Patent: September 27, 2022
    Assignee: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
    Inventors: Koji Kusunoki, Kei Takahashi, Toshiyuki Isa
  • Publication number: 20220302880
    Abstract: A semiconductor device including an amplifier with improved accuracy is provided. The semiconductor device includes a switch, a capacitor, a chopping circuit, and the amplifier. The amplifier includes a non-inverting input terminal, an inverting input terminal, an inverting output terminal, and a non-inverting output terminal. The semiconductor device, with use of the switch and the capacitor, has a function of sampling and holding a first potential and a second potential input in a first period. The chopping circuit is provided on each of the input terminal side and the output terminal side of the amplifier, and the first potential and the second potential are each input to either one of the non-inverting input terminal and the inverting input terminal in a second period. In a third period, the first potential and the second potential are each input to either one of the non-inverting input terminal and the inverted input terminal, which is different from the second period.
    Type: Application
    Filed: August 20, 2020
    Publication date: September 22, 2022
    Inventors: Kei TAKAHASHI, Takayuki IKEDA
  • Publication number: 20220299831
    Abstract: A display apparatus in which a high voltage can be supplied to a display device is provided. The display apparatus includes a data generation circuit, a source driver circuit, and a pixel. The source driver circuit is electrically connected to the pixel through first and second wirings functioning as signal lines. The pixel includes a display device that is a liquid crystal device, a potential of one electrode of the display device can be a potential of the first wiring, and a potential of the other electrode of the display device can be a potential of the second wiring. The image data generation circuit has a function of generating digital image data including first and second data. In the case where image data corresponding to the digital image data is supplied to the pixel, one of the first and second wirings is made to have a potential corresponding to first data, and the other of the first and second wirings is made to have a potential corresponding to the first data.
    Type: Application
    Filed: June 10, 2022
    Publication date: September 22, 2022
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Kei TAKAHASHI, Susumu KAWASHIMA, Koji KUSUNOKI, Kouhei TOYOTAKA, Kazunori WATANABE
  • Publication number: 20220294402
    Abstract: A novel comparison circuit, a novel amplifier circuit, a novel battery control circuit, a novel battery protection circuit, a power storage device, a semiconductor device, an electric device, and the like are provided. In a semiconductor device, one of a source and a drain of a first transistor is electrically connected to one of a source and a drain of a second transistor and one of a source and a drain of a third transistor; the other of the source and the drain of the third transistor is electrically connected to a first output terminal; and the other of the source and the drain of the second transistor is electrically connected to a second output terminal.
    Type: Application
    Filed: August 11, 2020
    Publication date: September 15, 2022
    Inventors: Kei TAKAHASHI, Takeshi AOKI, Munehiro KOZUMA, Takayuki IKEDA
  • Patent number: 11444358
    Abstract: A manufacturing method for fuel cell separators by way of a progressive pressing method which molds a plurality of separator shaped parts in an elongated metal plate, the method having: a pressing step of forming a separator shaped part in an elongated metal plate by way of pressing; a trimming step of cutting loose the separator shaped part from the elongated metal plate by punching an outer peripheral part of the separator shaped part formed in the elongated metal plate in the same pressing direction as the pressing step; a lifting step of lifting up the elongated metal plate from which the separator shaped part was cut loose; and a separator shaped part conveying step of conveying the separator shaped part which was cut loose to a downstream side in the conveying direction, in the midst of the elongated metal plate being lifted up in the lifting step.
    Type: Grant
    Filed: March 26, 2021
    Date of Patent: September 13, 2022
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Yuichi Hori, Tomotsugu Takahashi, Kei Matsumoto, Seitaro Nakamura
  • Publication number: 20220278368
    Abstract: Provided are a nonaqueous electrolyte solution which makes it possible to further improve low temperature characteristics and high temperature storage characteristics; and a nonaqueous electrolyte secondary battery comprising such a nonaqueous electrolyte solution. The present nonaqueous electrolyte solution comprises: (I) a first additive represented by the following formula [1], (II) at least one second additive selected from the group consisting of the compounds represented by the following formulae [2] to [5], difluoro(oxalato)borate, bis(oxalato)borate, tetrafluoro(oxalato)phosphate, difluorobis(oxalato)phosphate, tris(oxalato)phosphate, difluorophosphate, and fluorosulfonate, (III) a nonaqueous organic solvent, and (IV) a solute.
    Type: Application
    Filed: July 6, 2020
    Publication date: September 1, 2022
    Applicant: CENTRAL GLASS CO., LTD.
    Inventors: Takayoshi MORINAKA, Wataru KAWABATA, Kei KAWAHARA, Mikihiro TAKAHASHI
  • Publication number: 20220278680
    Abstract: An object of the present invention is to suppress deterioration in the thin film transistor. A plurality of pulse output circuits each include first to eleventh thin film transistors is formed. The pulse output circuit is operated on the basis of a plurality of clock signals which control each transistor, the previous stage signal input from a pulse output circuit in the previous stage, the next stage signal input from a pulse output circuit in the next stage, and a reset signal. In addition, a microcrystalline semiconductor is used for a semiconductor layer serving as a channel region of each transistor. Therefore, degradation of characteristics of the transistor can be suppressed.
    Type: Application
    Filed: May 12, 2022
    Publication date: September 1, 2022
    Inventors: Hiroyuki MIYAKE, Kei TAKAHASHI
  • Patent number: 11423855
    Abstract: A novel display panel that is highly convenient or reliable is provided. A pixel circuit includes a first switch, a node, a capacitor, and a second switch. The first switch includes a first terminal to which a first signal is supplied and a second terminal electrically connected to the node. The capacitor includes a first terminal electrically connected to the node and a second terminal electrically connected to the second switch. The second switch includes a first terminal to which a second signal is supplied and a second terminal electrically connected to the second terminal of the capacitor. In addition, the second switch has a function of changing from a non-conducting state to a conducting state when the first switch is in a non-conducting state and a function of changing from a conducting state to a non-conducting state when the first switch is in a non-conducting state. The display element performs display on the basis of a potential of the node.
    Type: Grant
    Filed: December 11, 2018
    Date of Patent: August 23, 2022
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Kouhei Toyotaka, Kei Takahashi, Koji Kusunoki, Kazunori Watanabe, Susumu Kawashima
  • Patent number: 11414039
    Abstract: In a side airbag device, a base member in which an airbag and an inflator are accommodated is fixed to a vehicle body. An outer covering member covers at least a front side of the base member to form a front-facing interior surface. The base member comprises: an inner portion located laterally farther inward within the vehicle body relative to the airbag; an outer portion located laterally farther outward within the vehicle body relative to the airbag; a rear portion located farther rearward relative to the airbag with respect to a front-rear direction of the seat, the rear portion connecting the inner portion and the outer portion; and a bridging portion made of a metal rod, and located apart from and farther frontward relative to the rear portion, the bridging portion connecting the inner portion and the outer portion.
    Type: Grant
    Filed: September 26, 2018
    Date of Patent: August 16, 2022
    Assignees: HONDA MOTOR CO., LTD., TS TECH CO., LTD.
    Inventors: Daisuke Kuriyama, Atsushi Yamabe, Kei Takahashi, Koji Ikeda, Hiroyuki Ito, Shinsuke Odai
  • Patent number: 11417273
    Abstract: A semiconductor device that reduces variations in the characteristics of driving transistors and corrects image data is provided. The semiconductor device includes an image data retention portion, a correction data retention portion, a driver circuit portion, a display element, and a threshold voltage correction circuit portion. The image data retention portion has a function of retaining first image data, and the correction data retention portion has a function of retaining correction data, and a function of generating second image data corresponding to the first image data and the correction data when the first image data is retained in the image data retention portion. The driver circuit portion has a function of generating a current corresponding to the second image data and feeding the current to the display element, and the threshold voltage correction circuit portion has a function of correcting a threshold voltage of a driving transistor in the driver circuit portion.
    Type: Grant
    Filed: December 4, 2018
    Date of Patent: August 16, 2022
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Kouhei Toyotaka, Kei Takahashi, Susumu Kawashima, Shunpei Yamazaki
  • Patent number: 11404447
    Abstract: A display device including a display portion with an extremely high resolution is provided. The display device includes a pixel circuit and a light-emitting element. The pixel circuit includes a first element layer including a first transistor and a second element layer including a second transistor. A channel formation region of the first transistor includes silicon. The first transistor has a function of driving the light-emitting element. The second transistor functions as a switch. A channel formation region of the second transistor includes a metal oxide. The metal oxide functions as a semiconductor. The second element layer is provided over the first element layer.
    Type: Grant
    Filed: June 23, 2020
    Date of Patent: August 2, 2022
    Inventors: Kei Takahashi, Hiroyuki Miyake
  • Publication number: 20220236824
    Abstract: A circuit which detects an output current from a pixel and an output current from an input device, and converts the output current into data is provided. The current detection circuit includes an integer circuit, a comparator, a counter, and a latch. The integrator circuit integrates the potential of a first signal during a period determined by a second signal and outputting it as a third signal. The comparator compares the potential of the third signal with a first potential and outputting a fourth signal. The counter outputs the number of pulses included in a fifth signal as a sixth signal during a period determined by the fourth signal. The latch holds the sixth signal. The integrator circuit preferably further includes an operational amplifier and some capacitors. The first signal is supplied from a pixel included in a display device or an input portion included in an input device.
    Type: Application
    Filed: April 11, 2022
    Publication date: July 28, 2022
    Inventors: Kei TAKAHASHI, Hiroyuki MIYAKE
  • Patent number: 11395384
    Abstract: An object of the present invention is to optimize a light-emitting driving voltage for each light-emitting portion.
    Type: Grant
    Filed: February 24, 2020
    Date of Patent: July 19, 2022
    Assignee: Rohm Co., Ltd.
    Inventors: Toru Takahashi, Kei Nagao
  • Patent number: 11384483
    Abstract: The present invention is directed to a non-moisturizing high-grade type tissue paper having excellent softness wherein the polyol applied to the two-ply tissue paper is not applied by external addition. In various embodiments, the tissue paper has a basis weight per ply of 14.0 to 17.0 g/m2, a paper thickness for two plies of 160 to 220 ?m, and a water content of 4.0 to 9.0% by mass, contains 0.15 to 0.45% by mass of an oily component to be extracted with diethyl ether, and has a bending rigidity of less than 0.006 gf·cm/cm in CD (cross direction) and a bending recovery force of less than 0.005 gf·cm/cm in CD.
    Type: Grant
    Filed: June 3, 2019
    Date of Patent: July 12, 2022
    Assignees: DAIO PAPER CORPORATION, TOHOKU UNIVERSITY
    Inventors: Sachiko Takahashi, Kazuo Hokkirigawa, Takeshi Yamaguchi, Kei Shibata
  • Patent number: 11381959
    Abstract: There is provided a terminal including a processor that includes, in capability information, a frequency separation between a lower edge of a component carrier with a lowest frequency for supported carrier aggregation and an upper edge of a component carrier with a highest frequency for the supported carrier aggregation; and a transmitter that transmits the capability information to a base station.
    Type: Grant
    Filed: December 6, 2018
    Date of Patent: July 5, 2022
    Assignee: NTT DOCOMO, INC.
    Inventors: Hideaki Takahashi, Hiromasa Umeda, Kei Andou
  • Publication number: 20220208245
    Abstract: A semiconductor device with reduced power consumption is provided. The semiconductor device includes a transmitter unit, a receiver unit, a bias-outputting unit, and a controller unit. The bias-outputting unit has a plurality of memory units. The plurality of memory units each retains information to determine transmission power. The receiver unit receives a request signal transmitted from a base station and supplies it to the controller unit. The controller unit selects one of the plurality of memory units according to the request signal. The memory unit has an OS transistor and retains information when power supply is stopped.
    Type: Application
    Filed: April 13, 2020
    Publication date: June 30, 2022
    Inventors: Munehiro KOZUMA, Takayuki IKEDA, Kei TAKAHASHI, Takeshi AOKI
  • Publication number: 20220209402
    Abstract: A conductor ground plane provided on a dielectric substrate and provided with a patch antenna and a conductor ground plane provided on the side of a dielectric substrate having a through hole are bonded by solder in a state where the through hole and the patch antenna are arranged to face each other, and a conductor ground plane provided on the back side of the dielectric substrate and a conductor ground plane provided on a dielectric substrate are bonded by solder.
    Type: Application
    Filed: June 24, 2019
    Publication date: June 30, 2022
    Applicant: Mitsubishi Electric Corporation
    Inventors: Kei YOKOKAWA, Narihiro NAKAMOTO, Toru FUKASAWA, Hitoshi ARAI, Tomohiro TAKAHASHI, Kensuke IWAKI, Takamichi KONO, Keisuke FUJIWARA
  • Publication number: 20220190398
    Abstract: A semiconductor device with reduced power consumption is provided. With three transistors, potentials of two nodes are switched and a voltage is detected. One of a source and a drain of a first transistor is electrically connected to a first terminal. The other of the source and the drain of the first transistor is electrically connected to a non-inverting input of a comparator through a first node. One of a source and a drain of a second transistor is electrically connected to a second terminal. The other of the source and the drain of the second transistor is electrically connected to one of a source and a drain of a third transistor through a second node. The other of the source and the drain of the third transistor is electrically connected to a third terminal. A first capacitor is provided between the first node and the second node. An inverting input of the comparator is electrically connected to a fourth terminal. An output of the comparator is electrically connected to a fifth terminal.
    Type: Application
    Filed: March 16, 2020
    Publication date: June 16, 2022
    Inventors: Takayuki IKEDA, Takeshi AOKI, Munehiro KOZUMA, Kei TAKAHASHI, Shunpei YAMAZAKI
  • Patent number: 11360363
    Abstract: The display apparatus includes a data generation circuit, a source driver circuit, and a pixel. The source driver circuit is electrically connected to the pixel through first and second wirings. The pixel includes a display device that is a liquid crystal device, a potential of one electrode of the display device can be a potential of the first wiring, and a potential of the other electrode of the display device can be a potential of the second wiring. The image data generation circuit has a function of generating digital image data including first and second data. One of the first and second wirings is made to have a potential corresponding to first data, and the other of the first and second wirings is made to have a potential corresponding to the second data. The potential of the first wiring and the potential of the second wiring are interchanged.
    Type: Grant
    Filed: January 8, 2019
    Date of Patent: June 14, 2022
    Inventors: Kei Takahashi, Susumu Kawashima, Koji Kusunoki, Kouhei Toyotaka, Kazunori Watanabe
  • Patent number: 11361497
    Abstract: An information processing device and an information processing method are provided. The information processing device including a display controller that controls display for a first user on the basis of a background image arranged in a virtual space with reference to a position of the first user in the virtual space, and an object related to a second user arranged in the virtual space so as to maintain a relative positional relationship between the first user and the second user in the virtual space.
    Type: Grant
    Filed: March 30, 2018
    Date of Patent: June 14, 2022
    Assignee: SONY CORPORATION
    Inventors: Tsuyoshi Ishikawa, Kei Takahashi