Patents by Inventor Tetsuo Morita

Tetsuo Morita 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: 12136380
    Abstract: According to one embodiment, a display device includes first wiring layers, a second wiring layer, a first insulating layer, first mounting electrodes, a second mounting electrode, a first light emitting element and a second light emitting element. The second mounting electrode is arranged to surround a first mounting electrode and an other first mounting electrode. The first light emitting element is mounted across the first mounting electrode and the second mounting electrode. The second light emitting element is mounted across the other first mounting electrode and the second mounting electrode. The second mounting electrode is electrically connected to the second wiring layer through a second opening of the first insulating layer, in a non-display area.
    Type: Grant
    Filed: April 21, 2021
    Date of Patent: November 5, 2024
    Assignee: Japan Display Inc.
    Inventors: Yasuhiro Ogawa, Tetsuo Morita
  • Publication number: 20240339861
    Abstract: A power source monitoring device for a power supply system equipped with a first system including a first power source and a second system including a second power source. An inter-system switch is closed under an operational state to supply power to electrical loads connected to the first and second systems. The first power source includes a voltage generation unit configured to generate an operating voltage for the electrical loads, and the second power source includes a power storage device chargeable by the voltage generation unit. The power source monitoring device includes a charging control unit configured to, under the operational state, close the inter-system switch and cause the voltage generation unit to charge the power storage device, and a dark current supply unit configured to, under a non-operational state, close the inter-system switch and supply dark current from the power storage device to the electrical loads.
    Type: Application
    Filed: June 17, 2024
    Publication date: October 10, 2024
    Applicant: DENSO CORPORATION
    Inventor: Tetsuo Morita
  • Publication number: 20240341124
    Abstract: According to one embodiment, a display device includes first to third pixels arranged in a first direction, and a partition surrounding the pixels. The partition includes a first partition between the first and second pixels extending in a second direction along the first pixel, a second partition between the first and second pixels extending in the second direction along the second pixel, and a third partition between the second and third pixels extending in the second direction. The first and second partitions are spaced apart from each other in the first direction via a slit. The third partition is continuously formed between the second and third pixels.
    Type: Application
    Filed: April 5, 2024
    Publication date: October 10, 2024
    Applicant: Japan Display Inc.
    Inventors: Hideyuki TAKAHASHI, Hiroyuki KIMURA, Hiroshi TABATAKE, Tetsuo MORITA
  • Publication number: 20240331627
    Abstract: An EL display device is controlled to emit light so as to effectively reduce a flicker even when low-frequency driving is used at any frequency. In a light emission control method of the EL display device including a plurality of regularly arranged light emitting elements, one or more non-light emission periods, in which the light emitting element does not emit, are inserted in one emission cycle of the light emitting element. In a luminance change of the light emitting element at the emission cycle of T?2?/?, l is a largest natural number with respect to a threshold frequency ?th/2?0 to satisfy l???th, the following holds: ? n = 1 l ? "\[LeftBracketingBar]" c n ? "\[RightBracketingBar]" 2 ? 1 2 ? ? n = 1 ? ? "\[LeftBracketingBar]" c n ? "\[RightBracketingBar]" 2 where n is an integer and cn is a complex Fourier coefficient of luminance L(t) of the light emitting element in a section 0?t<T.
    Type: Application
    Filed: March 28, 2024
    Publication date: October 3, 2024
    Inventors: Yukio TANAKA, Tetsuo MORITA, Yutaka UMEDA
  • Publication number: 20240331632
    Abstract: To effectively inhibit corrosion of a connecting terminal in an EL display, an array substrate includes a plurality of light emitting elements that are regularly arrayed, a scanning circuit that supplies the plurality of light emitting elements with at least a first scanning signal and a second scanning signal, and a plurality of connection terminals that are connected to the scanning circuit by a plurality of connection lines. The plurality of connection terminals include two adjacent connection terminals, an inverting circuit is interposed in at least one of two connection lines that connect the two adjacent connection terminals with the scanning circuit, and a same logic period in which output signals or input signals of the two adjacent connection terminals both have high potential or low potential in one scanning period is longer than a different logic period, in one scanning period.
    Type: Application
    Filed: March 25, 2024
    Publication date: October 3, 2024
    Inventors: Kenji HARADA, Hideyuki TAKAHASHI, Tetsuo MORITA, Masahiro KUBOTA
  • Publication number: 20240334768
    Abstract: According to one embodiment, a display device includes a display area which includes a plurality of subpixels, a plurality of lower electrodes provided in the subpixels, respectively, a plurality of organic layers which cover the lower electrodes, respectively, and emit light based on applied voltage, and a common electrode which covers the organic layers and overlaps the display area. Further, the common electrode has a slit in which at least an end reaches an outer edge of the common electrode.
    Type: Application
    Filed: March 7, 2024
    Publication date: October 3, 2024
    Applicant: Japan Display Inc.
    Inventors: Hideyuki TAKAHASHI, Hiroyuki KIMURA, Hiroshi TABATAKE, Tetsuo MORITA
  • Patent number: 12065091
    Abstract: A power supply system includes a first power output portion, a second power output portion, and a ring-form main pathway. A power supply system includes a first output pathway connecting the main pathway with the first power output portion, a second output pathway connecting the main pathway with the second power output portion, and a loading pathway connecting the main pathway with an electric load. The power supply system includes multiple main switches and a control unit. The main switch is configured to switch between a ring connection state and a non-ring connection state of the main pathway. The control unit controls the switching of the main switch. The control unit is configured to activate a non-ring connection mode that turns off one of the main switches and turns on the remainder of the main switches.
    Type: Grant
    Filed: December 14, 2021
    Date of Patent: August 20, 2024
    Assignee: DENSO CORPORATION
    Inventor: Tetsuo Morita
  • Publication number: 20240194140
    Abstract: A display device includes a first transistor controlled using a second control signal obtained by shifting a first control signal and electrically connected a first node, a second transistor electrically connected between the first node and a second node, a third transistor controlled using the first control signal to which a third control signal has been shifted, and electrically connected between the second node and a gate electrode of the second transistor, and a fourth transistor electrically connected to the second node is controlled to supply a reset voltage to the second node and the gate electrode of the second transistor using the third control signal.
    Type: Application
    Filed: November 30, 2023
    Publication date: June 13, 2024
    Applicant: Japan Display Inc.
    Inventor: Tetsuo MORITA
  • Patent number: 12004402
    Abstract: A drive circuit includes a holding capacitor, an element capacitor, and an additional capacitor interposed between one of the source and the drain, and one of the high-potential line and the low-potential line. The drive circuit configured to drive the first light emitter includes a first element capacitor as the element capacitor and a first additional capacitor as the additional capacitor. The driving circuit configured to drive the second light emitter includes a second element capacitor as the element capacitor and a second additional capacitor as the additional capacitor. The first element capacitor is larger in capacitance than the second element capacitor. The first additional capacitor is smaller in capacitance than the second additional capacitor.
    Type: Grant
    Filed: September 14, 2021
    Date of Patent: June 4, 2024
    Assignee: Japan Display Inc.
    Inventors: Hiroshi Tabatake, Tetsuo Morita, Yasuhiro Ogawa
  • Publication number: 20240161698
    Abstract: A display device includes a first transistor controlled using a second control signal obtained by shifting a first control signal and electrically connected between an image data signal line and a first node, a second transistor electrically connected between the first node and a second node, a third transistor controlled using the first control signal and electrically connected between the second node and a gate electrode of the second transistor, a fourth transistor controlled using a fourth control signal obtained by shifting a third control signal and electrically connected between a driving power supply line and the second node, a fifth transistor controlled using the third control signal and electrically connected to the first node, a sixth transistor controlled using the third control signal and electrically connected to a light emitting element and a first electrode of the fifth transistor, and the light emitting element connected to the first electrode.
    Type: Application
    Filed: November 2, 2023
    Publication date: May 16, 2024
    Applicant: Japan Display Inc.
    Inventor: Tetsuo MORITA
  • Publication number: 20240153443
    Abstract: According to one embodiment, a display device includes a display region where pixels are arranged. Each of the pixels includes a pixel electrode, a light emitting element, a drive transistor, a first capacitance electrode layer opposed to the pixel electrode and held at a constant potential, and an insulating layer forming an auxiliary capacitance together with the pixel electrode and the first capacitance electrode layer. A value of the auxiliary capacitance of the first pixel, of the values of the auxiliary capacitance of the pixels is the largest.
    Type: Application
    Filed: January 8, 2024
    Publication date: May 9, 2024
    Inventors: Tetsuo MORITA, Yasuhiro OGAWA
  • Publication number: 20240119893
    Abstract: According to one embodiment, a display device includes a pixel circuit provided in each of a plurality of pixels, a plurality of flip-flop circuits provided in a shift register and a reset element provided in each of the flip-flop circuits, and the reset element is an n-channel type transistor, the pixel circuit includes a light emitting element, a light emitting power supply and a switch element, and the light emitting element is disconnected from the light emitting power supply while the light emitting power supply is rising.
    Type: Application
    Filed: October 4, 2023
    Publication date: April 11, 2024
    Applicant: Japan Display Inc.
    Inventors: Kenji HARADA, Tetsuo MORITA
  • Patent number: 11949260
    Abstract: An inductance component has a given value causing a time constant of a circuit composed of one of first and second routes in which an abnormality does not occur and a connection path connecting the first and second routes not to allow a voltage of one of loads disposed in the other one of the routes to decrease to less than a lower limit of an operating voltage of one of loads during a shut-off period, which starts from a time when it is determined by an abnormality determiner that an abnormality has occurred in any one of the first route and the second route to a time when an inter-route switch enters a switched off state upon receiving a switch-off command from a state controller.
    Type: Grant
    Filed: April 9, 2021
    Date of Patent: April 2, 2024
    Assignee: DENSO CORPORATION
    Inventor: Tetsuo Morita
  • Publication number: 20240087515
    Abstract: According to one embodiment, a display device includes a base, a plurality of pixels, a power supply line and a power supply line drive circuit. The pixels each include a pixel circuit, a display element including a lower electrode, an upper electrode and an organic layer including a light-emitting layer. The upper electrode is connected to the power supply line that provides a predetermined potential to the upper electrode. The power supply line drive circuit supplies, to the power supply line, a first potential to the upper electrode during a light-emitting period and supplies, to the power supply line, a second potential to the upper electrode during a non-light-emitting period.
    Type: Application
    Filed: November 21, 2023
    Publication date: March 14, 2024
    Applicant: Japan Display Inc.
    Inventors: Hiroshi TABATAKE, Tetsuo MORITA
  • Patent number: 11919420
    Abstract: A power supply system includes: an inter-load switch including a first switch and a second switch connected in series, a voltage generation unit, an electric storage device connected between the first switch and the second switch, a first state control unit configured to select a first state in which power is supplied from at least one of the voltage generation unit or the electric storage device to a first load and a second load, and a second state control unit configured to, when determining that a failure has occurred, select a second state in which power is supplied from the electric storage device to a load on a side of a no-failure-occurrence system in which no failure has occurred, by turning off a switch on a side of a failure-occurrence system in which a failure has occurred and turning on a switch on a side of the no-failure-occurrence system.
    Type: Grant
    Filed: April 14, 2022
    Date of Patent: March 5, 2024
    Assignee: DENSO CORPORATION
    Inventor: Tetsuo Morita
  • Patent number: 11908393
    Abstract: According to one embodiment, a display device includes a display region where pixels are arranged. Each of the pixels includes a pixel electrode, a light emitting element, a drive transistor, a first capacitance electrode layer opposed to the pixel electrode and held at a constant potential, and an insulating layer forming an auxiliary capacitance together with the pixel electrode and the first capacitance electrode layer. A value of the auxiliary capacitance of the first pixel, of the values of the auxiliary capacitance of the pixels is the largest.
    Type: Grant
    Filed: December 14, 2022
    Date of Patent: February 20, 2024
    Assignee: Japan Display Inc.
    Inventors: Tetsuo Morita, Yasuhiro Ogawa
  • Publication number: 20240010142
    Abstract: A power supply system includes: a first system having a first power supply; a second system having a second power supply; and an inter-system switch provided in a connection path connecting the first and second systems. First and second paths are provided in parallel between a connection point, at which the connection path is connected with the second system, and the second power supply. The power supply system further includes: a charging unit provided in the first path to charge, with the inter-system switch closed, a storage battery of the second power supply; a discharge restriction unit provided in the second path to restrict discharge of the storage battery; an abnormality determination unit that determines whether an abnormality has occurred in the discharge restriction unit; and a use restriction unit that restricts use of the second power supply upon determination that an abnormality has occurred in the discharge restriction unit.
    Type: Application
    Filed: April 27, 2023
    Publication date: January 11, 2024
    Applicant: DENSO CORPORATION
    Inventor: Tetsuo MORITA
  • Patent number: 11869421
    Abstract: According to one embodiment, a display device includes a base, a plurality of pixels, a power supply line and a power supply line drive circuit. The pixels each include a pixel circuit, a display element including a lower electrode, an upper electrode and an organic layer including a light-emitting layer. The upper electrode is connected to the power supply line that provides a predetermined potential to the upper electrode. The power supply line drive circuit supplies, to the power supply line, a first potential to the upper electrode during a light-emitting period and supplies, to the power supply line, a second potential to the upper electrode during a non-light-emitting period.
    Type: Grant
    Filed: March 24, 2022
    Date of Patent: January 9, 2024
    Assignee: Japan Display Inc.
    Inventors: Hiroshi Tabatake, Tetsuo Morita
  • Patent number: 11810491
    Abstract: Different groups include the same type of control lines. The first control lines are arranged such that control lines of different types belonging to each of group are adjacent to each other. In the second area, the second control lines are arranged such that control lines of different types belonging to each group are adjacent to each other. In the non-display area, the second control lines are arranged such that control lines of the same type belonging to different groups are adjacent to each other. The capacitor electrode includes portions connected to each other and arranged in the second direction. Each portion faces each other for control lines of the same type adjacent in the non-display area. Any of the portions and any of the other portions differ in width in the first direction.
    Type: Grant
    Filed: April 16, 2021
    Date of Patent: November 7, 2023
    Assignee: Japan Display Inc.
    Inventors: Tetsuo Morita, Hiroyuki Kimura
  • Publication number: 20230318345
    Abstract: A power source system has a first system having a first power supply path and a first power source supplying a power source voltage, a second system having a second power supply path and a second power source having a battery being charged by the power source voltage, an intersystem switch, a switching controller switching the intersystem switch between an open state and a closed state, and a charging discharging part, arranged between the second power source and a connection node of a connection path on the second power supply path. The charging discharging part performs charging of the battery by the power source voltage and discharging of the battery based on a discharging request after completion of battery charging, and performs charging of the battery before the switching controller switches the intersystem switch to the open state from the closed state when overvoltage occurs in any system under the closed state of the intersystem switch.
    Type: Application
    Filed: June 7, 2023
    Publication date: October 5, 2023
    Applicant: DENSO CORPORATION
    Inventor: Tetsuo MORITA