Patents Assigned to Joled, Inc.
  • Publication number: 20220149314
    Abstract: A self-luminous display panel 10 in which self-luminous elements 2 are arranged on a plane, wherein each of the self-luminous elements includes: a pair of electrodes 13, 20 disposed facing each other, an electrode of the pair of electrodes including a metal layer 20A; functional layers 15, 16, 17, 18, 19 including a light emitting layer 17, disposed between the pair of electrodes; and a sealing layer 21 that covers the pair of electrodes and the functional layers from a direction. The self-luminous elements include a repaired self-luminous element 2?. The repaired self-luminous element includes a foreign object FO among the functional layers. The electrode including the metal layer has a high resistance portion 201 surrounding, in plan view, an area containing the foreign object, and has a thickened portion 202 of the metal layer at an outer edge, in plan view, of the high resistance portion.
    Type: Application
    Filed: November 9, 2021
    Publication date: May 12, 2022
    Applicant: JOLED Inc.
    Inventors: Akio MIYAJIMA, Michitoshi TSUCHIYA, Hiroki KATO, Makoto NODA, Masaichi OKUBO, Mario AMATSUCHI
  • Publication number: 20220123258
    Abstract: A display panel according to one embodiment of the disclosure includes: a flexible substrate; a plurality of self-luminescent elements; a plurality of TFT circuits provided between the flexible substrate and the plurality of self-luminescent elements; a first inorganic film covering each of the TFT circuits; a second inorganic film covering each of the self-luminescent elements; and a resin layer covering the second inorganic film and covering at least a portion of the first inorganic film in contact with an end portion of the second inorganic film. The first inorganic film is provided between the plurality of TFT circuits and the plurality of self-luminescent elements, and has a step portion. The step portion is a thinned portion of the first inorganic film opposed to an end portion of the flexible substrate.
    Type: Application
    Filed: January 8, 2020
    Publication date: April 21, 2022
    Applicant: JOLED INC.
    Inventors: Yuichiro ISHIYAMA, Takahiro SEKI
  • Patent number: 11309377
    Abstract: A pixel circuit disposed in a pixel region including three subpixel regions includes: three light-emitting elements that are disposed in the subpixel regions and have mutually different luminescent colors; one drive circuit that is disposed in a subpixel region serving as a first subpixel region, and supplies drive current to the three light-emitting elements in time division; and a positive power supply line serving as a first power supply line that is disposed in a subpixel region serving as a second subpixel region, and supplies power supply voltage to the drive circuit.
    Type: Grant
    Filed: January 24, 2020
    Date of Patent: April 19, 2022
    Assignee: JOLED INC.
    Inventor: Masanori Ohara
  • Publication number: 20220114961
    Abstract: A pixel circuit driving method is a method for driving a pixel circuit that includes a drive transistor that supplies a current corresponding to a signal voltage supplied via a signal line, a write transistor connected between the signal line and a gate electrode of the drive transistor, and an organic EL element that emits light in accordance with the current. The pixel circuit driving method includes supplying a reference potential to the gate electrode of the drive transistor before a threshold correction preparation operation of making a gate-source voltage of the drive transistor higher than a threshold voltage of the drive transistor.
    Type: Application
    Filed: October 6, 2021
    Publication date: April 14, 2022
    Applicant: JOLED INC.
    Inventors: Tetsuro YAMAMOTO, Kenji KOKUDA, Hitoshi TSUGE, Teppei TANAKA
  • Patent number: 11302253
    Abstract: An EL display apparatus is provided. A display screen includes pixels arranged in a matrix, with each pixel including an EL device and a pixel circuit. A source driver circuit is configured to output an analog video signal to each pixel. A gate driver circuit is on at least one side of the display screen, with the gate driver circuit including first and second gate driver circuits. Each pixel includes a driving transistor, a first switch transistor, and a second switch transistor. A gate terminal of the first switch transistor is connected to a first gate signal line of the first gate driver circuit, and a gate terminal of the second switch transistor is connected to a second gate signal line of the second gate driver circuit. The first and second switch transistors are on/off controlled, independently, by the first and second gate driver circuits.
    Type: Grant
    Filed: August 31, 2020
    Date of Patent: April 12, 2022
    Assignee: JOLED INC.
    Inventors: Hiroshi Takahara, Hitoshi Tsuge
  • Publication number: 20220093709
    Abstract: A light-emitting panel that includes a plurality of pixels, a plurality of first regulators, each of which extends in a first direction and defines each two of the pixels that are adjacent to each other in a second direction orthogonal to the first direction, and a plurality of second regulators, each of which extends in the second direction and defines each two of the pixels that are adjacent to each other in the first direction, the plurality of pixels including a plurality of first pixels arranged along the first direction and a plurality of second pixels arranged along the first direction, the plurality of first pixels and the plurality of second pixels sharing a light-emitting layer, each length of the plurality of second pixels being smaller than each length of the plurality of first pixels in the first direction.
    Type: Application
    Filed: December 1, 2021
    Publication date: March 24, 2022
    Applicant: JOLED Inc.
    Inventor: Masaki NISHIMURA
  • Publication number: 20220076626
    Abstract: A display device includes: a luminance converter which converts input gradation value into a corresponding target luminance value; a luminance correction calculator which calculates output gradation value from the target luminance value using efficiency residual ratio representing a deterioration degree of a light-emitting element, and calculates a corrected luminance value therefrom; a current stress calculator which converts current stress amount on a light-emitting element calculated from the corrected luminance value into current stress amount when first reference current flows through the light-emitting element, and accumulates this to calculate an accumulated first stress amount; a CB stress calculator which converts CB stress amount on the light-emitting element into current stress amount when second reference current flows through the light-emitting element, and accumulates this to calculate an accumulated second stress amount; and an efficiency residual ratio calculator which updates the efficiency r
    Type: Application
    Filed: September 3, 2021
    Publication date: March 10, 2022
    Applicant: JOLED INC.
    Inventors: Eiji IWAUCHI, Kazuki SAWA, Kazuhiro YONEDA
  • Patent number: 11270639
    Abstract: A pixel circuit configured to emit light based on an image signal includes: a light emitting element (organic EL element); a driver transistor configured to adjust current supplied to the light emitting element; and a write transistor connected between a signal line to which the image signal is applied and the driver transistor. The driver transistor includes: a gate electrode; a counter electrode disposed opposite the gate electrode; and a channel disposed between the gate electrode and the counter electrode. A potential applied to the counter electrode in a write period in which the write transistor conducts current in a state in which the image signal is applied to the signal line reduces a resistance value of the driver transistor to lower value than a potential applied to the counter electrode in an emission period of the light emitting element does.
    Type: Grant
    Filed: August 28, 2020
    Date of Patent: March 8, 2022
    Assignee: JOLED INC.
    Inventor: Tetsuro Yamamoto
  • Publication number: 20220068204
    Abstract: A display device includes: a luminance converter which converts input gradation value into a corresponding target luminance value; a luminance correction calculator which calculates output gradation value from the target luminance value and calculates a corrected luminance value from the output gradation value, using an efficiency residual ratio which is an index representing the light-emitting element deterioration degree; a current stress calculator which converts current stress amount on the light-emitting element calculated from the corrected luminance value into current stress amount when reference current flows through the light-emitting element, and calculates the accumulated current stress amount; a temperature stress calculator which converts temperature stress amount on the light-emitting element under environmental temperature into temperature stress amount on the light-emitting element under reference temperature, and calculates the accumulated current stress amount; and an efficiency residual rat
    Type: Application
    Filed: August 19, 2021
    Publication date: March 3, 2022
    Applicant: JOLED INC.
    Inventors: Eiji IWAUCHI, Kazuki SAWA, Kazuhiro YONEDA
  • Publication number: 20220059789
    Abstract: The display panel is a display panel that is flexible, including: an EL structure layer including a plurality of EL elements arranged two-dimensionally; a foamed resin layer on a side of the EL structure layer that is opposite to a light emitting surface of the EL structure layer; a metal layer provided between the EL structure layer and the foamed resin layer; and a first adhesive layer provided between the EL structure layer and the metal layer and comprises an adhesive having an elastic modulus of 90 kPa or more.
    Type: Application
    Filed: August 10, 2021
    Publication date: February 24, 2022
    Applicant: JOLED INC.
    Inventors: Nobuo NAITO, Takahiro SEKI
  • Publication number: 20220060258
    Abstract: The optical communication system includes a transmitter including a display panel which has a curved surface and is capable of emitting light, and a transmission controller which causes the display panel to emit light representing an information signal; and a receiver including an image sensor which receives the light emitted from the display panel, and a reception controller which extracts the information signal from the light received by the image sensor. The display panel may be a transparent display panel which allows background light to pass through.
    Type: Application
    Filed: January 8, 2020
    Publication date: February 24, 2022
    Applicant: JOLED INC.
    Inventor: Atsushi SASAKI
  • Patent number: 11258036
    Abstract: Provided is a display apparatus and a method of manufacture. The display apparatus includes a first substrate with a plurality of organic electroluminescence devices, a second substrate with a color filter, the second substrate facing the first substrate, and an adhesive layer disposed between the first substrate and the second substrate so as to cover the plurality of organic electroluminescence devices, the adhesive layer being made of a material selected from the group consisting of a phenol resin, a melanin resin, an unsaturated polyester resin, an epoxy resin, a silicon resin and a polyurethane resin.
    Type: Grant
    Filed: January 18, 2021
    Date of Patent: February 22, 2022
    Assignee: JOLED INC.
    Inventors: Yuichi Iwase, Yasunori Kijima, Jiro Yamada
  • Patent number: 11257890
    Abstract: A display apparatus including: a display region provided with a plurality of pixel portions; wires installed to the respective pixel portions within the display region from an outside of the display region for transmitting a signal to drive the respective pixel portions; connection pads provided on the outside of the display region and serving as input portions to provide the wires with a signal while electrically conducting with the wires; switch elements provided on the outside of the display region in a middle of the wires; and a light shielding covering portion shielding the switch elements from light and formed to cover the connection pads while electrically conducting with the connection pads.
    Type: Grant
    Filed: November 30, 2020
    Date of Patent: February 22, 2022
    Assignee: JOLED INC.
    Inventors: Shinya Tamonoki, Hiroshi Sagawa
  • Publication number: 20220045133
    Abstract: A display panel including pixels each including a self-luminous element and a color filter, including a green light emitting element among the self-luminous elements. The green light emitting element has an optical resonator structure in which a light transmissive metal thin film electrode, a green light emitting layer, and a light reflective electrode are disposed in this order with the light transmissive metal thin film electrode closest to one of the color filters corresponding to the green light emitting element, in order to enhance light intensity of a first wavelength, and the one of the color filters has a light transmittance of 50% or less for light having a second wavelength that is longer than the first wavelength and has a higher visibility characteristic as a green color component than the first wavelength.
    Type: Application
    Filed: August 3, 2021
    Publication date: February 10, 2022
    Applicant: JOLED INC.
    Inventor: Toshihiro FUKUDA
  • Patent number: 11245085
    Abstract: Disclosed is a self light-emitting element including a first electrode, a light-emitting layer disposed above the first electrode, a function layer disposed above the light-emitting layer, and doped with a metal, and a second electrode disposed above the function layer, in which the function layer has a multilayer structure of at least three layers including an uppermost layer, a lowermost layer, and an intermediate layer between the uppermost layer and the lowermost layer, and the intermediate layer is doped with the metal at a lower concentration than the uppermost layer and the lowermost layer.
    Type: Grant
    Filed: March 13, 2020
    Date of Patent: February 8, 2022
    Assignee: JOLED INC.
    Inventors: Hiroki Tsujimura, Kazuhiro Yokota, Hideyuki Shirahase, Kazuhiro Yoneda
  • Publication number: 20220036823
    Abstract: A display device includes: luminance converter that converts an input gradation value into a target luminance value corresponding to the input gradation value; correction calculator that calculates an output gradation value from the target luminance value and calculates a corrected luminance value from the output gradation value using an efficiency residual rate; cumulative stress calculator that updates the efficiency residual rate using a cumulative stress amount obtained by converting a stress amount on the light emitting element calculated from the corrected luminance value into a first stress amount at a reference current and accumulating a second stress amount obtained by converting the converted first stress amount according to a frame rate; and stress amount converter that converts the first stress amount into the second stress amount by multiplying the first stress amount by a conversion coefficient corresponding to the frame rate obtained from the video signal.
    Type: Application
    Filed: July 21, 2021
    Publication date: February 3, 2022
    Applicant: JOLED INC.
    Inventor: Eiji IWAUCHI
  • Patent number: 11239371
    Abstract: A semiconductor device includes a semiconductor film, an interlayer insulating film, a source-drain electrode, and a semiconductor auxiliary film. The semiconductor film includes an oxide semiconductor material and has a channel region and a low-resistance region. The low-resistance region has an electric resistance lower than an electric resistance of the channel region. The interlayer insulating film covers the semiconductor film and has a through-hole opposed to the low-resistance region. The source-drain electrode includes a source electrode and a drain electrode and is electrically coupled to the semiconductor film through the through-hole. The semiconductor auxiliary film is in contact with the low-resistance region of the semiconductor film, reduces an electric resistance of the semiconductor film, and has a first opening at least on a part of a portion opposed to the through-hole.
    Type: Grant
    Filed: July 22, 2019
    Date of Patent: February 1, 2022
    Assignee: JOLED INC.
    Inventors: Yasuhiro Terai, Naoki Asano, Takashi Maruyama
  • Patent number: 11239436
    Abstract: Disclosed herein is a display apparatus, including: a foldable substrate; a pixel array section including a plurality of pixels disposed on the substrate and each including an electro-optical device; the foldable substrate being folded at a substrate end portion at least on one side thereof around the pixel array section; a peripheral circuit section disposed on the substrate end portion and adapted to drive the pixels of the pixel array section; and a pad section provided on the substrate end portion on which the peripheral circuit section is provided and adapted to electrically connect the peripheral circuit section to the outside of the substrate.
    Type: Grant
    Filed: August 25, 2020
    Date of Patent: February 1, 2022
    Assignee: JOLED INC.
    Inventors: Tetsuo Minami, Katsuhide Uchino
  • Patent number: 11228005
    Abstract: A light-transmissive organic EL display panel including: a light transmissive substrate; organic EL elements on the substrate, where pixels each including a plurality of organic EL elements arranged along a row direction are arranged in pixel columns arranged in parallel along the row direction, and intervals between the pixel columns are each greater than a width in the row direction of any of the pixel columns; and dummy light emitting layers, wherein each of the organic EL elements included in one of the pixels includes any one of a plurality of organic light emitting materials that emit different colors of light, and the dummy light emitting layers include any one of the plurality of organic light emitting materials and are present above portions of non-pixel regions adjacent to the pixel columns in the row direction.
    Type: Grant
    Filed: December 26, 2019
    Date of Patent: January 18, 2022
    Assignee: JOLED INC.
    Inventor: Toshiki Nishikiori
  • Patent number: RE48931
    Abstract: A luminescent display device includes a substrate and a thin-film transistor above the substrate. The thin-film transistor includes a semiconductor layer, a gate insulating film on the semiconductor layer, a gate electrode on the gate insulating film, a source electrode, and a drain electrode. The luminescent display device further includes an interlayer insulating film on the gate electrode, a first capacitor electrode on the interlayer insulating film in a region above the gate electrode, and a luminescent element configured to be driven by a driver to produce luminescence. The driver includes the thin-film transistor, and the first capacitor electrode and the gate electrode constitute a capacitor.
    Type: Grant
    Filed: November 1, 2019
    Date of Patent: February 15, 2022
    Assignee: JOLED INC.
    Inventor: Shinya Ono