Patents by Inventor Ryohei Yamaoka

Ryohei Yamaoka 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: 10340470
    Abstract: A light-emitting element includes a cathode, an anode, a light-emitting layer, a first layer, a second layer, and a third layer. The first layer is provided between the cathode and the light-emitting layer. The second layer is provided between the light-emitting layer and the third layer and includes a region in contact with the third layer. The third layer is provided between the second layer and the anode and includes a region in contact with the anode. The first layer and the third layer each include an alkali metal or an alkaline earth metal. The second layer includes a material that has a function of transporting an electron.
    Type: Grant
    Filed: February 17, 2017
    Date of Patent: July 2, 2019
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Toshiki Sasaki, Riho Kataishi, Ryohei Yamaoka
  • Patent number: 10332859
    Abstract: A display panel includes a plurality of light-emitting elements. Light emitted from a first light-emitting element has a CIE 1931 chromaticity coordinate x of greater than 0.680 and less than or equal to 0.720 and a CIE 1931 chromaticity coordinate y of greater than or equal to 0.260 and less than or equal to 0.320. Light emitted from a second light-emitting element has a CIE 1931 chromaticity coordinate x of greater than or equal to 0.130 and less than or equal to 0.250 and a CIE 1931 chromaticity coordinate y of greater than 0.710 and less than or equal to 0.810. Light emitted from a third light-emitting element has a CIE 1931 chromaticity coordinate x of greater than or equal to 0.120 and less than or equal to 0.170 and a CIE 1931 chromaticity coordinate y of greater than or equal to 0.020 and less than 0.060.
    Type: Grant
    Filed: November 20, 2017
    Date of Patent: June 25, 2019
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Daiki Nakamura, Yusuke Nishido, Satoshi Seo, Toshiki Sasaki, Ryohei Yamaoka, Akihiro Kaita
  • Patent number: 10199436
    Abstract: Provided is a light-emitting device that can display an image with a wide color gamut or a novel light-emitting element. The light-emitting device includes a plurality of light-emitting elements each of which includes an EL layer between a pair of electrodes. Light obtained from a first light-emitting element through a first color filter has, on chromaticity coordinates (x, y), a chromaticity x of greater than 0.680 and less than or equal to 0.720 and a chromaticity y of greater than or equal to 0.260 and less than or equal to 0.320. Light obtained from a second light-emitting element through a second color filter has, on chromaticity coordinates (x, y), a chromaticity x of greater than or equal to 0.130 and less than or equal to 0.250 and a chromaticity y of greater than 0.710 and less than or equal to 0.810. Light obtained from a third light-emitting element through a third color filter has, on chromaticity coordinates (x, y), a chromaticity x of greater than or equal to 0.120 and less than or equal to 0.
    Type: Grant
    Filed: February 20, 2018
    Date of Patent: February 5, 2019
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Satoshi Seo, Toshiki Sasaki, Ryohei Yamaoka
  • Patent number: 10164203
    Abstract: A novel light-emitting element is provided. A light-emitting element that emits red light with high color purity and has high emission efficiency is provided. A full-color light-emitting device having low power consumption is provided. In the light-emitting element that exhibits white light emission, the emission wavelength range of red light is a specific range on the longer wavelength side than the conventional emission wavelength range of red light that is usually used, and an optical element having a specific transmittance in the specific wavelength range is used.
    Type: Grant
    Filed: March 2, 2018
    Date of Patent: December 25, 2018
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Satoshi Seo, Toshiki Sasaki, Ryohei Yamaoka
  • Publication number: 20180247981
    Abstract: A display device with a wide viewing angle is provided. A display device capable of displaying an image with a wide color gamut is provided. A display device includes a first light-emitting element, a second light-emitting element, and a third light-emitting element. The light-emitting elements each include a pair of electrodes and a light-emitting layer. One of the pair of electrodes includes a reflective electrode, and the other of the pair of electrodes includes a transflective electrode. The light-emitting layers of the light-emitting elements are different from each other. A first peak wavelength of the emission spectrum of the first light-emitting element is greater than or equal to 400 nm and less than or equal to 480 nm. A second peak wavelength of the emission spectrum of the second light-emitting element is greater than or equal to 580 nm and less than or equal to 700 nm.
    Type: Application
    Filed: February 20, 2018
    Publication date: August 30, 2018
    Inventors: Ryohei YAMAOKA, Satoshi SEO, Daiki NAKAMURA
  • Publication number: 20180248146
    Abstract: A novel light-emitting element is provided. A light-emitting element that emits red light with high color purity and has high emission efficiency is provided. A full-color light-emitting device having low power consumption is provided. In the light-emitting element that exhibits white light emission, the emission wavelength range of red light is a specific range on the longer wavelength side than the conventional emission wavelength range of red light that is usually used, and an optical element having a specific transmittance in the specific wavelength range is used.
    Type: Application
    Filed: March 2, 2018
    Publication date: August 30, 2018
    Applicant: Semiconductor Energy Laboratory Co, Ltd.
    Inventors: Satoshi Seo, Toshiki Sasaki, Ryohei Yamaoka
  • Publication number: 20180190727
    Abstract: Provided is a light-emitting device that can display an image with a wide color gamut or a novel light-emitting element. The light-emitting device includes a plurality of light-emitting elements each of which includes an EL layer between a pair of electrodes. Light obtained from a first light-emitting element through a first color filter has, on chromaticity coordinates (x, y), a chromaticity x of greater than 0.680 and less than or equal to 0.720 and a chromaticity y of greater than or equal to 0.260 and less than or equal to 0.320. Light obtained from a second light-emitting element through a second color filter has, on chromaticity coordinates (x, y), a chromaticity x of greater than or equal to 0.130 and less than or equal to 0.250 and a chromaticity y of greater than 0.710 and less than or equal to 0.810. Light obtained from a third light-emitting element through a third color filter has, on chromaticity coordinates (x, y), a chromaticity x of greater than or equal to 0.120 and less than or equal to 0.
    Type: Application
    Filed: February 20, 2018
    Publication date: July 5, 2018
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Satoshi Seo, Toshiki Sasaki, Ryohei Yamaoka
  • Publication number: 20180151630
    Abstract: A highly reliable light-emitting element which can keep favorable characteristics throughout long-time driving is provided. In addition, a light-emitting element with high color purity and high emission efficiency is provided. Furthermore, a light-emitting device having a long lifetime in which the light-emitting element is used is provided. Moreover, an electronic device and a lighting device each of which has a long lifetime are provided. In the light-emitting element including an EL layer between a pair of electrodes, the EL layer has a stacked-layer structure of a first light-emitting layer, a second light-emitting layer, and a third light-emitting layer. The light-emitting layer includes an electron-transport material, a hole-transport material, and a light-emitting material. Furthermore, light emitted from the first light-emitting layer and light emitted from the third light-emitting layer have the same color and each have a longer wavelength than light emitted from the second light-emitting layer.
    Type: Application
    Filed: November 29, 2017
    Publication date: May 31, 2018
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Ryohei Yamaoka, Satoshi Seo, Shogo Uesaka, Shiho Nomura
  • Publication number: 20180151539
    Abstract: A display panel includes a plurality of light-emitting elements. Light emitted from a first light-emitting element has a CIE 1931 chromaticity coordinate x of greater than 0.680 and less than or equal to 0.720 and a CIE 1931 chromaticity coordinate y of greater than or equal to 0.260 and less than or equal to 0.320. Light emitted from a second light-emitting element has a CIE 1931 chromaticity coordinate x of greater than or equal to 0.130 and less than or equal to 0.250 and a CIE 1931 chromaticity coordinate y of greater than 0.710 and less than or equal to 0.810. Light emitted from a third light-emitting element has a CIE 1931 chromaticity coordinate x of greater than or equal to 0.120 and less than or equal to 0.170 and a CIE 1931 chromaticity coordinate y of greater than or equal to 0.020 and less than 0.060.
    Type: Application
    Filed: November 20, 2017
    Publication date: May 31, 2018
    Inventors: Daiki NAKAMURA, Yusuke NISHIDO, Satoshi SEO, Toshiki SASAKI, Ryohei YAMAOKA, Akihiro KAITA
  • Patent number: 9978977
    Abstract: A light-emitting element with high reliability that can keep favorable characteristics after long-time driving is provided. In addition, a light-emitting device having a long lifetime including the light-emitting element is provided. Moreover, an electronic device and a lighting device having a long lifetime are provided. In a light-emitting element including an EL layer between a pair of electrodes, a light-emitting layer included in the EL layer has a stacked-layer structure which is different from the conventional structure, whereby the light-emitting element can keep favorable characteristics after long-time driving even in the case where carrier balance is changed over time due to driving of the light-emitting element or a light-emitting region is shifted due to the change.
    Type: Grant
    Filed: May 23, 2017
    Date of Patent: May 22, 2018
    Inventors: Satoshi Seo, Shogo Uesaka, Ryohei Yamaoka
  • Patent number: 9966574
    Abstract: A tandem light-emitting element in which generation of crosstalk can be suppressed even when the element is applied to a high-definition display is provided. In the tandem light-emitting element, a layer in contact the anode side of an intermediate layer contains 2,9-bis(naphthalen-2-yl)-4,7-diphenyl-1,10-phenanthroline (abbreviation: NBPhen).
    Type: Grant
    Filed: September 28, 2017
    Date of Patent: May 8, 2018
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Tsunenori Suzuki, Shogo Uesaka, Ryohei Yamaoka, Satoshi Seo
  • Patent number: 9935292
    Abstract: To provide a novel light-emitting device with high productivity, the light-emitting device includes a first light-emitting element, a second light-emitting element, and a third light-emitting element. In the first light-emitting element, a first lower electrode, a first transparent conductive layer, a first light-emitting layer, a second light-emitting layer, and an upper electrode are stacked in this order. In the second light-emitting element, a second lower electrode, a second transparent conductive layer, the first light-emitting layer, the second light-emitting layer, and the upper electrode are stacked in this order. In the third light-emitting element, a third lower electrode, a third transparent conductive layer, the second light-emitting layer, and the upper electrode are stacked in this order. The first transparent conductive layer includes a first region. The second transparent conductive layer includes a second region as thick as the third transparent conductive layer.
    Type: Grant
    Filed: February 13, 2017
    Date of Patent: April 3, 2018
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Satoshi Seo, Ryohei Yamaoka, Shogo Uesaka
  • Patent number: 9911937
    Abstract: A novel light-emitting element is provided. A light-emitting element that emits red light with high color purity and has high emission efficiency is provided. A full-color light-emitting device having low power consumption is provided. In the light-emitting element that exhibits white light emission, the emission wavelength range of red light is a specific range on the longer wavelength side than the conventional emission wavelength range of red light that is usually used, and an optical element having a specific transmittance in the specific wavelength range is used.
    Type: Grant
    Filed: May 9, 2017
    Date of Patent: March 6, 2018
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Satoshi Seo, Toshiki Sasaki, Ryohei Yamaoka
  • Patent number: 9905617
    Abstract: Provided is a light-emitting device that can display an image with a wide color gamut or a novel light-emitting element. The light-emitting device includes a plurality of light-emitting elements each of which includes an EL layer between a pair of electrodes. Light obtained from a first light-emitting element through a first color filter has, on chromaticity coordinates (x, y), a chromaticity x of greater than 0.680 and less than or equal to 0.720 and a chromaticity y of greater than or equal to 0.260 and less than or equal to 0.320. Light obtained from a second light-emitting element through a second color filter has, on chromaticity coordinates (x, y), a chromaticity x of greater than or equal to 0.130 and less than or equal to 0.250 and a chromaticity y of greater than 0.710 and less than or equal to 0.810. Light obtained from a third light-emitting element through a third color filter has, on chromaticity coordinates (x, y), a chromaticity x of greater than or equal to 0.120 and less than or equal to 0.
    Type: Grant
    Filed: May 18, 2017
    Date of Patent: February 27, 2018
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Satoshi Seo, Toshiki Sasaki, Ryohei Yamaoka
  • Publication number: 20180019445
    Abstract: A tandem light-emitting element in which generation of crosstalk can be suppressed even when the element is applied to a high-definition display is provided. In the tandem light-emitting element, a layer in contact the anode side of an intermediate layer contains 2,9-bis(naphthalen-2-yl)-4,7-diphenyl-1,10-phenanthroline (abbreviation: NBPhen).
    Type: Application
    Filed: September 28, 2017
    Publication date: January 18, 2018
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Tsunenori Suzuki, Shogo UESAKA, Ryohei YAMAOKA, Satoshi SEO
  • Publication number: 20170338289
    Abstract: Provided is a light-emitting device that can display an image with a wide color gamut or a novel light-emitting element. The light-emitting device includes a plurality of light-emitting elements each of which includes an EL layer between a pair of electrodes. Light obtained from a first light-emitting element through a first color filter has, on chromaticity coordinates (x, y), a chromaticity x of greater than 0.680 and less than or equal to 0.720 and a chromaticity y of greater than or equal to 0.260 and less than or equal to 0.320. Light obtained from a second light-emitting element through a second color filter has, on chromaticity coordinates (x, y), a chromaticity x of greater than or equal to 0.130 and less than or equal to 0.250 and a chromaticity y of greater than 0.710 and less than or equal to 0.810. Light obtained from a third light-emitting element through a third color filter has, on chromaticity coordinates (x, y), a chromaticity x of greater than or equal to 0.120 and less than or equal to 0.
    Type: Application
    Filed: May 18, 2017
    Publication date: November 23, 2017
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Satoshi SEO, Toshiki SASAKI, Ryohei YAMAOKA
  • Publication number: 20170331065
    Abstract: A novel light-emitting element is provided. A light-emitting element that emits red light with high color purity and has high emission efficiency is provided. A full-color light-emitting device having low power consumption is provided. In the light-emitting element that exhibits white light emission, the emission wavelength range of red light is a specific range on the longer wavelength side than the conventional emission wavelength range of red light that is usually used, and an optical element having a specific transmittance in the specific wavelength range is used.
    Type: Application
    Filed: May 9, 2017
    Publication date: November 16, 2017
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Satoshi Seo, Toshiki Sasaki, Ryohei Yamaoka
  • Patent number: 9780338
    Abstract: A tandem light-emitting element in which generation of crosstalk can be suppressed even when the element is applied to a high-definition display is provided. In the tandem light-emitting element, a layer in contact the anode side of an intermediate layer contains 2,9-bis(naphthalen-2-yl)-4,7-diphenyl-1,10-phenanthroline (abbreviation: NBPhen).
    Type: Grant
    Filed: November 30, 2016
    Date of Patent: October 3, 2017
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Tsunenori Suzuki, Shogo Uesaka, Ryohei Yamaoka, Satoshi Seo
  • Publication number: 20170263878
    Abstract: A light-emitting element with high reliability that can keep favorable characteristics after long-time driving is provided. In addition, a light-emitting device having a long lifetime including the light-emitting element is provided. Moreover, an electronic device and a lighting device having a long lifetime are provided. In a light-emitting element including an EL layer between a pair of electrodes, a light-emitting layer included in the EL layer has a stacked-layer structure which is different from the conventional structure, whereby the light-emitting element can keep favorable characteristics after long-time driving even in the case where carrier balance is changed over time due to driving of the light-emitting element or a light-emitting region is shifted due to the change.
    Type: Application
    Filed: May 23, 2017
    Publication date: September 14, 2017
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Satoshi Seo, Shogo Uesaka, Ryohei Yamaoka
  • Publication number: 20170244059
    Abstract: A light-emitting element includes a cathode, an anode, a light-emitting layer, a first layer, a second layer, and a third layer. The first layer is provided between the cathode and the light-emitting layer. The second layer is provided between the light-emitting layer and the third layer and includes a region in contact with the third layer. The third layer is provided between the second layer and the anode and includes a region in contact with the anode. The first layer and the third layer each include an alkali metal or an alkaline earth metal. The second layer includes a material that has a function of transporting an electron.
    Type: Application
    Filed: February 17, 2017
    Publication date: August 24, 2017
    Inventors: Toshiki SASAKI, Riho KATAISHI, Ryohei YAMAOKA