Patents by Inventor Toshiki Sasaki
Toshiki Sasaki 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).
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Patent number: 10847498Abstract: 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: GrantFiled: April 10, 2020Date of Patent: November 24, 2020Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Daiki Nakamura, Yusuke Nishido, Satoshi Seo, Toshiki Sasaki, Ryohei Yamaoka, Akihiro Kaita
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Publication number: 20200350373Abstract: One object of this invention is to provide a novel light-emitting device with low power consumption. The light-emitting device includes a first light-emitting element and a second light-emitting element. The first light-emitting element includes a first electrode, a second electrode, and a light-emitting layer. The second light-emitting element includes the first electrode, a third electrode, and the light-emitting layer. The second electrode comprises only a first conductive film, and the third electrode comprises a second conductive film and a third conductive film. The first electrode has a function of reflecting light. The second conductive film has functions of reflecting light and transmitting light. The first conductive film and the third conductive film each have a function of transmitting light.Type: ApplicationFiled: July 21, 2020Publication date: November 5, 2020Inventors: Nobuharu OHSAWA, Satoshi SEO, Toshiki SASAKI
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Patent number: 10797113Abstract: One object of this invention is to provide a novel light-emitting device with low power consumption. The light-emitting device includes a first light-emitting element and a second light-emitting element. The first light-emitting element includes a first electrode, a second electrode, and a light-emitting layer. The second light-emitting element includes the first electrode, a third electrode, and the light-emitting layer. The second electrode comprises only a first conductive film, and the third electrode comprises a second conductive film and a third conductive film. The first electrode has a function of reflecting light. The second conductive film has functions of reflecting light and transmitting light. The first conductive film and the third conductive film each have a function of transmitting light.Type: GrantFiled: January 19, 2017Date of Patent: October 6, 2020Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Nobuharu Ohsawa, Satoshi Seo, Toshiki Sasaki
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Publication number: 20200258948Abstract: 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: ApplicationFiled: February 21, 2020Publication date: August 13, 2020Applicant: Semiconductor Energy Laboratory Co., Ltd.Inventors: Satoshi Seo, Toshiki Sasaki, Ryohei Yamaoka
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Patent number: 10741619Abstract: A technique of manufacturing a display device with high productivity is provided. In addition, a high-definition display device with high color purity is provided. By adjusting the optical path length between an electrode having a reflective property and a light-emitting layer by the central wavelength of a wavelength range of light passing through a color filter layer, the high-definition display device with high color purity is provided without performing selective deposition of light-emitting layers. In a light-emitting element, a plurality of light-emitting layers emitting light of different colors are stacked. The closer the light-emitting layer is to the electrode having a reflective property, the longer the wavelength of light emitted from the light-emitting layer is.Type: GrantFiled: October 10, 2016Date of Patent: August 11, 2020Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Satoshi Seo, Toshiki Sasaki, Nobuharu Ohsawa, Takahiro Ushikubo, Shunpei Yamazaki
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Publication number: 20200243482Abstract: 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: ApplicationFiled: April 10, 2020Publication date: July 30, 2020Inventors: Daiki NAKAMURA, Yusuke NISHIDO, Satoshi SEO, Toshiki SASAKI, Ryohei YAMAOKA, Akihiro KAITA
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Patent number: 10686152Abstract: Emission efficiency of a light-emitting element is improved. The light-emitting element has a pair of electrodes and an EL layer between the pair of electrodes. The EL layer includes a first light-emitting layer and a second light-emitting layer. The first light-emitting layer includes a fluorescent material and a host material. The second light-emitting layer includes a phosphorescent material, a first organic compound, and a second organic compound. An emission spectrum of the second light-emitting layer has a peak in a yellow wavelength region. The first organic compound and the second organic compound form an exciplex.Type: GrantFiled: December 12, 2018Date of Patent: June 16, 2020Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Satoshi Seo, Takahiro Ishisone, Nobuharu Ohsawa, Yusuke Nonaka, Toshiki Sasaki
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Patent number: 10680017Abstract: A light-emitting element including a first electrode, a second electrode, and an EL layer provided between the first and second electrodes is provided. The first electrode includes a conductive layer, a first transparent conductive layer in contact with the conductive layer, and a second transparent conductive layer in contact with the first transparent conductive layer. The first transparent conductive layer contains a first oxide. The second transparent conductive layer contains a second oxide. The conductive layer has a function of reflecting light. The first oxide contains In and M (M represents Al, Si, Ti, Ga, Y, Zr, La, Ce, Nd, or Hf). The second oxide contains In. The resistivity of the second transparent conductive layer is lower than that of the first transparent conductive layer. The thickness of the second transparent conductive layer is greater than or equal to that of the first transparent conductive layer.Type: GrantFiled: November 4, 2015Date of Patent: June 9, 2020Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shogo Uesaka, Toshiki Sasaki, Nobuharu Ohsawa, Satoshi Seo
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Publication number: 20200152903Abstract: A light-emitting element with a high current efficiency is provided. A low-power consumption light-emitting device is also provided. In addition, low-power consumption electronic device and lighting device are provided. The light-emitting element includes an EL layer between a pair of electrodes. The EL layer includes a light-emitting layer. The light-emitting layer includes a first light-emitting layer and a second light-emitting layer. The emission peak of the second light-emitting layer is at a shorter wavelength than that of the first light-emitting layer. The first light-emitting layer includes a host material and a guest material. The LUMO level of the guest material is in the range of ±0.1 eV of the LUMO level of the host material.Type: ApplicationFiled: January 9, 2020Publication date: May 14, 2020Applicant: Semiconductor Energy Laboratory Co., Ltd.Inventors: Toshiki SASAKI, Shogo UESAKA, Satoshi SEO
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Patent number: 10622334Abstract: 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: GrantFiled: June 20, 2019Date of Patent: April 14, 2020Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Daiki Nakamura, Yusuke Nishido, Satoshi Seo, Toshiki Sasaki, Ryohei Yamaoka, Akihiro Kaita
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Patent number: 10573693Abstract: 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: GrantFiled: February 1, 2019Date of Patent: February 25, 2020Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Satoshi Seo, Toshiki Sasaki, Ryohei Yamaoka
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Publication number: 20200052042Abstract: A technique of manufacturing a display device with high productivity is provided. In addition, a high-definition display device with high color purity is provided. By adjusting the optical path length between an electrode having a reflective property and a light-emitting layer by the central wavelength of a wavelength range of light passing through a color filter layer, the high-definition display device with high color purity is provided without performing selective deposition of light-emitting layers. In a light-emitting element, a plurality of light-emitting layers emitting light of different colors are stacked. The closer the light-emitting layer is positioned to the electrode having a reflective property, the shorter the wavelength of light emitted from the light-emitting layer is.Type: ApplicationFiled: October 22, 2019Publication date: February 13, 2020Applicant: Semiconductor Energy Laboratory Co., Ltd.Inventors: Satoshi Seo, Toshiki Sasaki, Nobuharu Ohsawa, Takahiro Ushikubo, Shunpei Yamazaki
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Patent number: 10535830Abstract: A light-emitting element with a high current efficiency is provided. A low-power consumption light-emitting device is also provided. In addition, low-power consumption electronic device and lighting device are provided. The light-emitting element includes an EL layer between a pair of electrodes. The EL layer includes a light-emitting layer. The light-emitting layer includes a first light-emitting layer and a second light-emitting layer. The emission peak of the second light-emitting layer is at a shorter wavelength than that of the first light-emitting layer. The first light-emitting layer includes a host material and a guest material. The LUMO level of the guest material is in the range of ±0.1 eV of the LUMO level of the host material.Type: GrantFiled: February 17, 2015Date of Patent: January 14, 2020Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Toshiki Sasaki, Shogo Uesaka, Satoshi Seo
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Patent number: 10504966Abstract: A light-emitting device includes a first light-emitting element emitting blue light, a second light-emitting element emitting green light, and a third light-emitting element emitting red light. A first reflective electrode and a first transparent conductive film, a second reflective electrode and a second transparent conductive film, and a third reflective electrode and a third transparent conductive film are stacked in the first to third light-emitting elements, respectively. A first light-emitting layer, a charge-generation layer, a second light-emitting layer, and an electrode are stacked in this order over each of the first transparent conductive film, the second transparent conductive film, and the third transparent conductive film. The electrode has functions of transmitting and reflecting light. The first to third reflective electrodes contain silver. The first transparent conductive film is thicker than the third transparent conductive film.Type: GrantFiled: September 5, 2017Date of Patent: December 10, 2019Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Satoshi Seo, Nobuharu Ohsawa, Toshiki Sasaki
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Patent number: 10468619Abstract: Emission efficiency of a light-emitting element is improved. The light-emitting element has a pair of electrodes and an EL layer between the pair of electrodes. The EL layer includes a first light-emitting layer and a second light-emitting layer. The first light-emitting layer includes a fluorescent material and a host material. The second light-emitting layer includes a phosphorescent material, a first organic compound, and a second organic compound. An emission spectrum of the second light-emitting layer has a peak in a yellow wavelength region. The first organic compound and the second organic compound form an exciplex.Type: GrantFiled: April 17, 2018Date of Patent: November 5, 2019Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Satoshi Seo, Takahiro Ishisone, Nobuharu Ohsawa, Yusuke Nonaka, Toshiki Sasaki
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Patent number: 10461134Abstract: A technique of manufacturing a display device with high productivity is provided. In addition, a high-definition display device with high color purity is provided. By adjusting the optical path length between an electrode having a reflective property and a light-emitting layer by the central wavelength of a wavelength range of light passing through a color filter layer, the high-definition display device with high color purity is provided without performing selective deposition of light-emitting layers. In a light-emitting element, a plurality of light-emitting layers emitting light of different colors are stacked. The closer the light-emitting layer is positioned to the electrode having a reflective property, the shorter the wavelength of light emitted from the light-emitting layer is.Type: GrantFiled: March 28, 2018Date of Patent: October 29, 2019Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Satoshi Seo, Toshiki Sasaki, Nobuharu Ohsawa, Takahiro Ushikubo, Shunpei Yamazaki
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Publication number: 20190304951Abstract: 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: ApplicationFiled: June 20, 2019Publication date: October 3, 2019Inventors: Daiki NAKAMURA, Yusuke NISHIDO, Satoshi SEO, Toshiki SASAKI, Ryohei YAMAOKA, Akihiro KAITA
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Patent number: 10424755Abstract: A light-emitting element having high external quantum efficiency is provided. A light-emitting element having a long lifetime is provided. A light-emitting layer is provided between a pair of electrodes. The light-emitting layer is a stack of a first light-emitting layer, which contains at least a first phosphorescent compound, a first organic compound having an electron-transport property, and a second organic compound having a hole-transport property and is provided on the anode side, and a second light-emitting layer, which contains at least a second phosphorescent compound and the first organic compound having an electron-transport property. A combination of the first organic compound and the second organic compound forms an exciplex.Type: GrantFiled: June 27, 2017Date of Patent: September 24, 2019Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Hiromi Seo, Satoko Shitagaki, Satoshi Seo, Takahiro Ushikubo, Toshiki Sasaki, Shogo Uesaka
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Patent number: 10418594Abstract: Provided is a light-emitting device which can emit monochromatic light with high purity due to a microcavity effect and which can emit white light in the case of a combination of monochromatic light. Provided is a high-definition light-emitting device. Provided is a light-emitting device with low power consumption. In a light-emitting device with a white-color filter top emission structure, one pixel is formed of four sub-pixels of RBGY, an EL layer includes a first light-emitting substance which emits blue light and a second light-emitting substance which emits light corresponding to a complementary color of blue, and a semi-transmissive and semi-reflective electrode (an upper electrode) is formed so as to cover an edge portion of the EL layer.Type: GrantFiled: July 20, 2018Date of Patent: September 17, 2019Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Satoshi Seo, Nobuharu Ohsawa, Toshiki Sasaki
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Publication number: 20190229158Abstract: 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: ApplicationFiled: February 1, 2019Publication date: July 25, 2019Applicant: Semiconductor Energy Laboratory Co., Ltd.Inventors: Satoshi Seo, Toshiki Sasaki, Ryohei YAMAOKA