Patents by Inventor Kenta Seki

Kenta Seki 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: 20220091465
    Abstract: According to one embodiment, a display device comprises image signal lines, scanning signal lines, pixels, a display area, pixel electrodes, and common electrodes. The common electrodes are configured to detect an object and to display an image in the display area. The common electrodes include first and second common electrodes which are arranged in a first direction. A first slit is provided between the first and second common electrodes. The first and second common electrodes are supplied a signal different from each other. A second slit is provided in the first common electrode. Each of the first slit and the second slit overlaps one of the image signal lines and extends in an extension direction in which the image signal line extends.
    Type: Application
    Filed: December 6, 2021
    Publication date: March 24, 2022
    Applicant: JAPAN DISPLAY INC.
    Inventors: Kenta SEKI, Gen KOIDE, Hayato KURASAWA
  • Publication number: 20220077559
    Abstract: A directional coupler includes a main line, a secondary line, and a variable terminator. The variable terminator includes a variable inductor. The variable inductor includes a plurality of inductors coupled in series with each other between an end portion of the secondary line and the ground and switches configured to bypass at least one inductor of the plurality of inductors.
    Type: Application
    Filed: November 17, 2021
    Publication date: March 10, 2022
    Inventors: Kenta SEKI, Ryangsu KIM, Katsuya SHIMIZU
  • Publication number: 20220077560
    Abstract: A directional coupler includes a multilayer body, a conductor (31), and a conductor (32). The conductor (31) is a conductor that is arranged in an insulating layer (21) of the multilayer body and that extends in a certain shape. The conductor (32) is arranged on a side of an insulating layer (22) of the multilayer body opposite the insulating layer (21). The conductor (32) runs parallel to the conductor (31) and is electromagnetically coupled to the conductor (31). The conductor (32) has a winding shape with one or more rounds, and has a conductor portion (321) and a conductor portion (325) that are arranged adjacent to each other with a spacing in a direction orthogonal to a running parallel direction. In plan view of the multilayer body, the conductor (31) is arranged between the conductor portion (321) and the conductor portion (325).
    Type: Application
    Filed: August 30, 2021
    Publication date: March 10, 2022
    Inventors: Kenta SEKI, Ryangsu KIM, Kazuhito OSAWA
  • Patent number: 11264353
    Abstract: A switch module (1) includes RF input/output wires (51a, 51c) connecting RF input/output pad electrodes (11a, 11c) and RF input/output lead electrodes (31a, 31c), control signal wires (52a, 52b) connecting control-signal pad electrodes (12a, 12b) and control-signal lead electrodes (32a, 32b), and a ground wire (53a) connected to a ground pad electrode (13a). The control-signal pad electrodes (12a, 12b), the control-signal lead electrodes (32a, 32b), and the control signal wires (52a, 52b) are disposed in a region (a2) on the opposite side, with respect to a boundary defined by a linear line (L1) along an extension direction of the ground wire (53a), to a region (a1) in which the RF input/output wire (51a), the RF input/output pad electrode (11a), and the RF input/output lead electrode (31a) are disposed.
    Type: Grant
    Filed: July 8, 2020
    Date of Patent: March 1, 2022
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventor: Kenta Seki
  • Patent number: 11249352
    Abstract: According to one embodiment, a display device comprises image signal lines, scanning signal lines, pixels, a display area, pixel electrodes, and common electrodes. The common electrodes are configured to detect an object and to display an image in the display area. The common electrodes include first and second common electrodes which are arranged in a first direction. A first slit is provided between the first and second common electrodes. The first and second common electrodes are supplied a signal different from each other. A second slit is provided in the first common electrode. Each of the first slit and the second slit overlaps one of the image signal lines and extends in an extension direction in which the image signal line extends.
    Type: Grant
    Filed: September 24, 2020
    Date of Patent: February 15, 2022
    Assignee: JAPAN DISPLAY INC.
    Inventors: Kenta Seki, Gen Koide, Hayato Kurasawa
  • Publication number: 20210382362
    Abstract: A display device includes a display section in which a plurality of pixels are arrayed in a matrix, a plurality of scan lines which select pixels, a plurality of signal lines which supply image signals to the selected pixels, and color filters that are arranged so as to correspond to color displays of the pixels. In the device, the display section includes an effective pixel portion and a frame portion that surrounds the effective pixel portion, and the frame portion and a wiring circuit of the effective pixel portion are covered with light-shielding layers, the light-shielding layers being separated from each other at a certain separation location in the display section, and a plurality of color filters having different colors are arranged by being stacked at the separation location.
    Type: Application
    Filed: August 23, 2021
    Publication date: December 9, 2021
    Inventors: Kenta Seki, Seiji Uejima, Ryo Yamaoka, Hidemasa Yamaguchi
  • Publication number: 20210376441
    Abstract: A directional coupler includes a main line, a sub-line electromagnetically coupled with the main line, a coupled output terminal, plural filters, filter switching circuits, and plural filter protecting switches. Each of the filter switching circuits is able to connect a corresponding one of the plural filters to one end of the sub-line and to the coupled output terminal. Each of the filter protecting switches is directly connected to a corresponding end of a corresponding one of the plural filters and is able to switch between a connection state and a disconnection state. The connection state is a state in which the corresponding end of the corresponding one of the plural filters is connected to a reference potential. The disconnection state is a state in which the corresponding end of the corresponding one of the plural filters is disconnected from the reference potential.
    Type: Application
    Filed: May 26, 2021
    Publication date: December 2, 2021
    Inventors: Daisuke TOKUDA, Katsuya SHIMIZU, Kenta SEKI, Ryangsu KIM
  • Publication number: 20210344096
    Abstract: A directional coupler includes a main line, a sub-line, a coupling terminal, a terminal circuit, a first switching circuit, and a second switching circuit. The first switching circuit and the second switching circuit respectively connects the first end and the second end of the sub-line alternately to the coupling terminal and to the terminal circuit. The first switching circuit connects the first end to the coupling terminal at a time that differs from a time at which the first switching circuit disconnects the first end from the terminal circuit. The first switching circuit disconnects the first end from the coupling terminal at a time that differs from a time at which the first switching circuit connects the first end to the terminal circuit.
    Type: Application
    Filed: April 29, 2021
    Publication date: November 4, 2021
    Inventors: Kenta SEKI, Ryangsu KIM, Kazuhito OSAWA, Katsuya SHIMIZU
  • Patent number: 11156886
    Abstract: A display device includes a display section in which a plurality of pixels are arrayed in a matrix, a plurality of scan lines which select pixels, a plurality of signal lines which supply image signals to the selected pixels, and color filters that are arranged so as to correspond to color displays of the pixels. In the device, the display section includes an effective pixel portion and a frame portion that surrounds the effective pixel portion, and the frame portion and a wiring circuit of the effective pixel portion are covered with light-shielding layers, the light-shielding layers being separated from each other at a certain separation location in the display section, and a plurality of color filters having different colors are arranged by being stacked at the separation location.
    Type: Grant
    Filed: July 13, 2020
    Date of Patent: October 26, 2021
    Assignee: Japan Display Inc.
    Inventors: Kenta Seki, Seiji Uejima, Ryo Yamaoka, Hidemasa Yamaguchi
  • Patent number: 11121444
    Abstract: A directional coupler includes a main line for transmitting a high frequency signal, a sub line electromagnetically coupled to the main line, a termination circuit for terminating one end portion of the sub line, and a variable filter that has an input terminal and an output terminal and the input terminal is connected to another end portion of the sub line. The variable filter is a filter unit circuit having one frequency band as a pass band or a stop band, and in the filter unit circuit, a variable passive element for shifting a frequency in the pass band or the stop band is disposed.
    Type: Grant
    Filed: August 27, 2019
    Date of Patent: September 14, 2021
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Kenta Seki, Ryangsu Kim, Katsuya Shimizu
  • Publication number: 20210184328
    Abstract: A directional coupler includes a main line and a sub-line electromagnetically coupled to each other, a variable termination circuit that is connected to one end of the sub-line and that has a variable impedance, a variable matching circuit that is connected to the other end of the sub-line and that has a variable impedance or a variable attenuator that has a variable attenuation, and a control circuit that controls the impedance of the variable termination circuit and that controls the impedance of the variable matching circuit or the attenuation of the variable attenuator. The control circuit includes a non-volatile memory and controls the impedance of the variable termination circuit in accordance with data stored in the memory.
    Type: Application
    Filed: February 26, 2021
    Publication date: June 17, 2021
    Inventors: Kenta SEKI, Ryangsu KIM, Katsuya SHIMIZU
  • Patent number: 10971448
    Abstract: A switching device includes first to third layers laminated in sequence above a principal surface of a substrate, a plurality of input terminals, a plurality of output terminals, a plurality of switching circuits, and a plurality of channels. Each of the channels electrically connecting one of the plurality of input terminals and one of the plurality of output terminals with one of the plurality of switching circuits interposed therebetween. The plurality of channels include a first channel and a second channel that intersect with each other when the principal surface of the substrate is seen in a plan view. In an intersection area where the first and second channels intersect with each other, the first channel is disposed on the first layer, the second channel is disposed on the third layer, and none of the plurality of channels is disposed on the second layer.
    Type: Grant
    Filed: August 23, 2019
    Date of Patent: April 6, 2021
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventor: Kenta Seki
  • Publication number: 20210036396
    Abstract: A directional coupler includes a main line, a first sub-line to be electromagnetically coupled to the main line, a second sub-line to be electromagnetically coupled to the main line, and a coupling terminal configured to output a detection signal corresponding to a radio frequency signal that is transmitted through the main line, the first sub-line and the second sub-line are different in length from each other, and connection between the first sub-line and the coupling terminal and connection between the second sub-line and the coupling terminal are switched.
    Type: Application
    Filed: July 29, 2020
    Publication date: February 4, 2021
    Inventors: Kenta SEKI, Yasushi SHIGENO, Daisuke TOKUDA, Ryangsu KIM, Katsuya SHIMIZU, Kazuhito OSAWA
  • Publication number: 20210036395
    Abstract: A directional coupler includes a main line through which a signal is transmitted, first and second sub-lines that are selectively coupled to the main line, and a common output port that outputs a detection signal generated by the signal transmitted through the main line, wherein a first degree of coupling between the main line and the first sub-line is different than a second degree of coupling between the main line and the second sub-line.
    Type: Application
    Filed: July 29, 2020
    Publication date: February 4, 2021
    Inventors: Kenta SEKI, Yasushi SHIGENO, Daisuke TOKUDA, Ryangsu KIM, Katsuya SHIMIZU, Kazuhito OSAWA
  • Patent number: 10903835
    Abstract: A length of a zone in which a power propagation direction from an input/output terminal (P251) toward a common terminal (P20) and a power propagation direction from the common terminal (P20) toward an external connection terminal (P10) are opposite to each other is longer than a length of a zone in which a power propagation direction from an input/output terminal (P211) toward the common terminal (P20) and a power propagation direction from the common terminal (P20) toward the external connection terminal (P10) are opposite to each other. A FET (251) and a FET (211) have structures that power transferred between a drain and a source of the FET (251) in accordance with predetermined input power is greater than power transferred between a drain and a source of the FET (211).
    Type: Grant
    Filed: January 30, 2020
    Date of Patent: January 26, 2021
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventor: Kenta Seki
  • Publication number: 20210003892
    Abstract: According to one embodiment, a display device comprises image signal lines, scanning signal lines, pixels, a display area, pixel electrodes, and common electrodes. The common electrodes are configured to detect an object and to display an image in the display area. The common electrodes include first and second common electrodes which are arranged in a first direction. A first slit is provided between the first and second common electrodes. The first and second common electrodes are supplied a signal different from each other. A second slit is provided in the first common electrode. Each of the first slit and the second slit overlaps one of the image signal lines and extends in an extension direction in which the image signal line extends.
    Type: Application
    Filed: September 24, 2020
    Publication date: January 7, 2021
    Applicant: JAPAN DISPLAY INC.
    Inventors: Kenta SEKI, Gen KOIDE, Hayato KURASAWA
  • Publication number: 20200366263
    Abstract: A filter module includes a first ground terminal, a second ground terminal, a low pass filter, and a second inductor. The low pass filter includes a first inductor provided in an input/output path of signal, a first capacitor provided in a first path connecting a first node and the first ground terminal, and a second capacitor provided in a second path connecting a second node and the second ground terminal. The second inductor is connected in series to the second capacitor in a path connecting the second capacitor and the second ground terminal. The first path and the second path are not connected to each other by any path except the one between the first node and the second node.
    Type: Application
    Filed: July 31, 2020
    Publication date: November 19, 2020
    Inventors: Hisanori MURASE, Naru MORITO, Hiromichi KITAJIMA, Ryangsu KIM, Yasushi SHIGENO, Kenta SEKI
  • Patent number: 10824019
    Abstract: According to one embodiment, a display device comprises image signal lines, scanning signal lines, pixels, a display area, pixel electrodes, and common electrodes. The common electrodes are configured to detect an object and to display an image in the display area. The common electrodes include first and second common electrodes which are arranged in a first direction. A first slit is provided between the first and second common electrodes. The first and second common electrodes are supplied a signal different from each other. A second slit is provided in the first common electrode. Each of the first slit and the second slit overlaps one of the image signal lines and extends in an extension direction in which the image signal line extends.
    Type: Grant
    Filed: January 2, 2020
    Date of Patent: November 3, 2020
    Assignee: JAPAN DISPLAY INC.
    Inventors: Kenta Seki, Gen Koide, Hayato Kurasawa
  • Publication number: 20200341339
    Abstract: A display device includes a display section in which a plurality of pixels are arrayed in a matrix, a plurality of scan lines which select pixels, a plurality of signal lines which supply image signals to the selected pixels, and color filters that are arranged so as to correspond to color displays of the pixels. In the device, the display section includes an effective pixel portion and a frame portion that surrounds the effective pixel portion, and the frame portion and a wiring circuit of the effective pixel portion are covered with light-shielding layers, the light-shielding layers being separated from each other at a certain separation location in the display section, and a plurality of color filters having different colors are arranged by being stacked at the separation location.
    Type: Application
    Filed: July 13, 2020
    Publication date: October 29, 2020
    Inventors: Kenta Seki, Seiji Uejima, Ryo Yamaoka, Hidemasa Yamaguchi
  • Publication number: 20200343214
    Abstract: A switch module (1) includes RF input/output wires (51a, 51c) connecting RF input/output pad electrodes (11a, 11c) and RF input/output lead electrodes (31a, 31c), control signal wires (52a, 52b) connecting control-signal pad electrodes (12a, 12b) and control-signal lead electrodes (32a, 32b), and a ground wire (53a) connected to a ground pad electrode (13a). The control-signal pad electrodes (12a, 12b), the control-signal lead electrodes (32a, 32b), and the control signal wires (52a, 52b) are disposed in a region (a2) on the opposite side, with respect to a boundary defined by a linear line (L1) along an extension direction of the ground wire (53a), to a region (a1) in which the RF input/output wire (51a), the RF input/output pad electrode (11a), and the RF input/output lead electrode (31a) are disposed.
    Type: Application
    Filed: July 8, 2020
    Publication date: October 29, 2020
    Inventor: Kenta SEKI