Patents by Inventor Tomoe Matsubara
Tomoe Matsubara 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: 10181571Abstract: A multicolor light-emitting element in which light-emitting layers emitting light of different colors are stacked and color adjustment is easily made is provided. A multicolor light-emitting element which is inexpensive and has favorable emission efficiency is provided. A light-emitting element in which at least two light-emitting layers emitting light of different colors are formed in contact with each other and the light emitted from the two light-emitting layers is obtained from exciplexes is provided. In addition, the light-emitting element in which the exciplexes emit delayed fluorescence is provided.Type: GrantFiled: April 13, 2017Date of Patent: January 15, 2019Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Tomoe Matsubara, Satoshi Seo
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Publication number: 20170222169Abstract: A multicolor light-emitting element in which light-emitting layers emitting light of different colors are stacked and color adjustment is easily made is provided. A multicolor light-emitting element which is inexpensive and has favorable emission efficiency is provided. A light-emitting element in which at least two light-emitting layers emitting light of different colors are formed in contact with each other and the light emitted from the two light-emitting layers is obtained from exciplexes is provided. In addition, the light-emitting element in which the exciplexes emit delayed fluorescence is provided.Type: ApplicationFiled: April 13, 2017Publication date: August 3, 2017Applicant: Semiconductor Energy Laboratory Co., Ltd.Inventors: Tomoe MATSUBARA, Satoshi Seo
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Patent number: 9627640Abstract: A multicolor light-emitting element in which light-emitting layers emitting light of different colors are stacked and color adjustment is easily made is provided. A multicolor light-emitting element which is inexpensive and has favorable emission efficiency is provided. A light-emitting element in which at least two light-emitting layers emitting light of different colors are formed in contact with each other and the light emitted from the two light-emitting layers is obtained from exciplexes is provided. In addition, the light-emitting element in which the exciplexes emit delayed fluorescence is provided.Type: GrantFiled: December 17, 2015Date of Patent: April 18, 2017Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Tomoe Matsubara, Satoshi Seo
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Publication number: 20160111671Abstract: A multicolor light-emitting element in which light-emitting layers emitting light of different colors are stacked and color adjustment is easily made is provided. A multicolor light-emitting element which is inexpensive and has favorable emission efficiency is provided. A light-emitting element in which at least two light-emitting layers emitting light of different colors are formed in contact with each other and the light emitted from the two light-emitting layers is obtained from exciplexes is provided. In addition, the light-emitting element in which the exciplexes emit delayed fluorescence is provided.Type: ApplicationFiled: December 17, 2015Publication date: April 21, 2016Applicant: Semiconductor Energy Laboratory Co., Ltd.Inventors: Tomoe Matsubara, Satoshi SEO
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Patent number: 9219243Abstract: A multicolor light-emitting element in which light-emitting layers emitting light of different colors are stacked and color adjustment is easily made is provided. A multicolor light-emitting element which is inexpensive and has favorable emission efficiency is provided. A light-emitting element in which at least two light-emitting layers emitting light of different colors are formed in contact with each other and the light emitted from the two light-emitting layers is obtained from exciplexes is provided. In addition, the light-emitting element in which the exciplexes emit delayed fluorescence is provided.Type: GrantFiled: July 31, 2013Date of Patent: December 22, 2015Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Tomoe Matsubara, Satoshi Seo
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Publication number: 20140034926Abstract: A multicolor light-emitting element in which light-emitting layers emitting light of different colors are stacked and color adjustment is easily made is provided. A multicolor light-emitting element which is inexpensive and has favorable emission efficiency is provided. A light-emitting element in which at least two light-emitting layers emitting light of different colors are formed in contact with each other and the light emitted from the two light-emitting layers is obtained from exciplexes is provided. In addition, the light-emitting element in which the exciplexes emit delayed fluorescence is provided.Type: ApplicationFiled: July 31, 2013Publication date: February 6, 2014Applicant: Semiconductor Energy Laboratory Co., Ltd.Inventors: Tomoe Matsubara, Satoshi Seo
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Patent number: 8586974Abstract: A light-emitting device including a reflection member, a sealing member having a light-transmitting property, and a light-emitting element between the reflection member and the sealing member is provided. In the light-emitting device, the light-emitting element includes a first transparent electrode; a second transparent electrode; and an EL layer between the first transparent electrode and the second transparent electrode, the reflection member includes a reflective electrode having projections and an electric resistance lower than an electric resistance of the first transparent electrode; and a planarization film covering the reflective electrode, a through hole that reaches the reflective electrode is formed in the planarization film, and the reflective electrode is electrically connected to the first transparent electrode.Type: GrantFiled: December 20, 2011Date of Patent: November 19, 2013Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shunpei Yamazaki, Hisao Ikeda, Tomoe Matsubara
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Patent number: 8461605Abstract: The invention provides a light emitting device which uses a color conversion layer, with high light emission efficiency and a low driving voltage. The light emitting device includes a light emitting element having a pair of electrodes and a layer containing an organic compound sandwiched between the pair of electrodes, and a color conversion layer which absorbs light emitted from the light emitting element and emits light with a longer wavelength than a wavelength of the absorbed light. A portion of the layer containing an organic compound includes a buffer layer containing a composite material including an organic compound having a hole transporting property and a metal compound. The thickness of the buffer layer is determined so that the light emission efficiency becomes high.Type: GrantFiled: September 10, 2012Date of Patent: June 11, 2013Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shunpei Yamazaki, Tomoe Matsubara
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Publication number: 20130009185Abstract: The invention provides a light emitting device which uses a color conversion layer, with high light emission efficiency and a low driving voltage. The light emitting device includes a light emitting element having a pair of electrodes and a layer containing an organic compound sandwiched between the pair of electrodes, and a color conversion layer which absorbs light emitted from the light emitting element and emits light with a longer wavelength than a wavelength of the absorbed light. A portion of the layer containing an organic compound includes a buffer layer containing a composite material including an organic compound having a hole transporting property and a metal compound. The thickness of the buffer layer is determined so that the light emission efficiency becomes high.Type: ApplicationFiled: September 10, 2012Publication date: January 10, 2013Inventors: Shunpei Yamazaki, Tomoe Matsubara
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Patent number: 8269227Abstract: The invention provides a light emitting device which uses a color conversion layer, with high light emission efficiency and a low driving voltage. The light emitting device includes a light emitting element having a pair of electrodes and a layer containing an organic compound sandwiched between the pair of electrodes, and a color conversion layer which absorbs light emitted from the light emitting element and emits light with a longer wavelength than a wavelength of the absorbed light. A portion of the layer containing an organic compound includes a buffer layer containing a composite material including an organic compound having a hole transporting property and a metal compound. The thickness of the buffer layer is determined so that the light emission efficiency becomes high.Type: GrantFiled: June 5, 2006Date of Patent: September 18, 2012Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shunpei Yamazaki, Tomoe Matsubara
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Publication number: 20120161115Abstract: A light-emitting device including a reflection member, a sealing member having a light-transmitting property, and a light-emitting element between the reflection member and the sealing member is provided. In the light-emitting device, the light-emitting element includes a first transparent electrode; a second transparent electrode; and an EL layer between the first transparent electrode and the second transparent electrode, the reflection member includes a reflective electrode having projections and an electric resistance lower than an electric resistance of the first transparent electrode; and a planarization film covering the reflective electrode, a through hole that reaches the reflective electrode is formed in the planarization film, and the reflective electrode is electrically connected to the first transparent electrode.Type: ApplicationFiled: December 20, 2011Publication date: June 28, 2012Inventors: Shunpei Yamazaki, Hisao Ikeda, Tomoe Matsubara
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Patent number: 7554265Abstract: An active matrix display device which can easily improve the viewing angle characteristics. In the active matrix display device where light is emitted in the direction of a substrate over which thin film transistors are formed, when focusing on the multiple interference caused by the light emitted from a light-emitting element, which is reflected on the film used for forming the thin film transistors, effect on the multiple interference can be drastically reduced by forming the reflecting film to have the substantial optical thickness of ?/2, without losing the function of the thin film transistor.Type: GrantFiled: June 23, 2005Date of Patent: June 30, 2009Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Hiromichi Godo, Tomoe Matsubara, Masayuki Sakakura
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Publication number: 20060284204Abstract: The invention provides a light emitting device which uses a color conversion layer, with high light emission efficiency and a low driving voltage. The light emitting device includes a light emitting element having a pair of electrodes and a layer containing an organic compound sandwiched between the pair of electrodes, and a color conversion layer which absorbs light emitted from the light emitting element and emits light with a longer wavelength than a wavelength of the absorbed light. A portion of the layer containing an organic compound includes a buffer layer containing a composite material including an organic compound having a hole transporting property and a metal compound. The thickness of the buffer layer is determined so that the light emission efficiency becomes high.Type: ApplicationFiled: June 5, 2006Publication date: December 21, 2006Inventors: Shunpei Yamazaki, Tomoe Matsubara
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Publication number: 20050285516Abstract: An active matrix display device which can easily improve the viewing angle characteristics. In the active matrix display device where light is emitted in the direction of a substrate over which thin film transistors are formed, when focusing on the multiple interference caused by the light emitted from a light-emitting element, which is reflected on the film used for forming the thin film transistors, effect on the multiple interference can be drastically reduced by forming the reflecting film to have the substantial optical thickness of ?/2, without losing the function of the thin film transistor.Type: ApplicationFiled: June 23, 2005Publication date: December 29, 2005Applicant: Semiconductor Energy Laboratory Co., Ltd.Inventors: Hiromichi Godo, Tomoe Matsubara, Masayuki Sakakura
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Patent number: D844602Type: GrantFiled: March 23, 2017Date of Patent: April 2, 2019Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shunpei Yamazaki, Tomoe Matsubara