Patents by Inventor Keiko Kurata
Keiko Kurata 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: 10249848Abstract: An organic light-emitting panel includes a reflective electrode, a functional layer, having a single or multi-layer structure, located on the reflective electrode, an organic light-emitting layer located on the functional layer, a transparent electrode located above the organic light-emitting layer, a low refractive index layer located on the transparent electrode, and a first thin-film sealing layer located on the low refractive index layer. The low refractive index layer has a lower refractive index than both the transparent electrode and the first thin-film sealing layer. Difference between respective refractive indices of the low refractive index layer and the transparent electrode is 0.4-1.1. Difference between respective refractive indices of the low refractive index layer and the first thin-film sealing layer is 0.1-0.8. The low refractive index layer has thickness of 20-130 nm.Type: GrantFiled: July 17, 2012Date of Patent: April 2, 2019Assignee: JOLED INC.Inventors: Kazuhiro Yoneda, Keiko Kurata, Noriyuki Matsusue
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Patent number: 9698382Abstract: Each of blue light emitting elements includes: a photoanode; a translucent cathode; an organic light emitting layer between the photoanode and the translucent cathode; a first functional layer between the organic light emitting layer and the photoanode; and a second functional layer between the organic light emitting layer and the translucent cathode, and has a resonator structure. The first functional layer has an optical film thickness of 48-62 nm. The translucent cathode is a stack of a first translucent conductive layer, a metal layer, and a second translucent conductive layer stacked in this order from the second functional layer side. The first translucent conductive layer has a refractivity of 2.0-2.4, and a film thickness of 85-97 nm. The metal layer has a refractivity different by 0 to 2.0 from that of the first translucent conductive layer, and has a film thickness of 2-22 nm.Type: GrantFiled: July 23, 2014Date of Patent: July 4, 2017Assignee: JOLED INC.Inventors: Keiko Kurata, Muneharu Sato, Tetsuro Kondoh, Shinichiro Ishino
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Publication number: 20160164040Abstract: Each of blue light emitting elements includes: a photoanode; a translucent cathode; an organic light emitting layer between the photoanode and the translucent cathode; a first functional layer between the organic light emitting layer and the photoanode; and a second functional layer between the organic light emitting layer and the translucent cathode, and has a resonator structure. The first functional layer has an optical film thickness of 48-62 nm. The translucent cathode is a stack of a first translucent conductive layer, a metal layer, and a second translucent conductive layer stacked in this order from the second functional layer side. The first translucent conductive layer has a refractivity of 2.0-2.4, and a film thickness of 85-97 nm. The metal layer has a refractivity different by 0 to 2.0 from that of the first translucent conductive layer, and has a film thickness of 2-22 nm.Type: ApplicationFiled: July 23, 2014Publication date: June 9, 2016Applicant: JOLED INC.Inventors: Keiko KURATA, Muneharu SATO, Tetsuro KONDOH, Shinichiro ISHINO
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Patent number: 8957412Abstract: An organic EL panel comprises anodes, a cathode, organic light-emitting layers, and first functional layers each including a hole injection layer and a hole transport layer. The hole injection layer of each of the R, G, and B colors is made of only a metal oxide including tungsten oxide, and has a thickness of 5 nm to 40 nm. At least one of the hole injection layers has a thickness different from the other hole injection layers. The hole transport layers of the R, G, and B colors are equivalent in thickness. The organic light-emitting layers of the R, G, and B colors are equivalent in thickness.Type: GrantFiled: November 29, 2010Date of Patent: February 17, 2015Assignee: Panasonic CorporationInventors: Ryuuta Yamada, Keiko Kurata, Shinya Fujimura, Hirofumi Fujita, Yoshiaki Tsukamoto, Takahiro Komatsu, Satoru Ohuchi
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Patent number: 8933471Abstract: An organic EL panel includes reflective electrodes, a transparent electrode, organic light-emitting layers, and functional layers that are each provided between a corresponding one of the reflective electrodes and a corresponding one of the respective organic light-emitting layers. The film thicknesses of the respective functional layers of R, G, and B colors are each 60 nm or less such that a local maximum of light-emitting efficiency for a corresponding color is exhibited, and are substantially equal to each other. The optical distances between the respective organic light-emitting layers of the R, G, and B colors and the respective reflective electrodes are each 100 nm or less, and are substantially equal to each other.Type: GrantFiled: June 5, 2012Date of Patent: January 13, 2015Assignee: Panasonic CorporationInventors: Keiko Kurata, Noriyuki Matsusue, Kazuhiro Yoneda
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Patent number: 8916862Abstract: To increase light-extraction efficiency and simplify manufacturing process. An organic EL panel includes: first electrode reflecting incident light; second electrode transmitting incident light therethrough; organic light-emitting layer emitting light of corresponding color among RGB colors; first functional layer including charge injection/transport layer and at least one other layer, and disposed between the first electrode and the light-emitting layer; and second functional layer disposed between the second electrode and the light-emitting layer. The first functional layers of the RGB colors are equal in film thickness, the organic light-emitting layers of the RGB colors are equal in optical distance from the first electrode, the second functional layers of the RGB colors are equal in film thickness, the organic light-emitting layers of the RGB colors are equal in optical distance from the second electrode, and the organic light-emitting layers of the RGB colors differ in film thickness.Type: GrantFiled: November 24, 2010Date of Patent: December 23, 2014Assignee: Panasonic CorporationInventors: Keiko Kurata, Noriyuki Matsusue, Kazuhiro Yoneda
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Patent number: 8907329Abstract: An organic EL panel includes first electrode, second electrode; organic light-emitting layer of each of RGB colors, and functional layer disposed between the first electrode and the light-emitting layer. The functional layers of RGB colors have the same film thickness. Film thickness of each of the functional layers of RG colors corresponds to a first local maximum of light-extraction efficiency of light before passing through a color filter, and film thickness of the functional layer of B color corresponds to a value of light-extraction efficiency smaller than a first local maximum of light-extraction efficiency of light before passing through a color filter. The light-emitting layers of RGB colors differ in film thickness, such that the functional layers of RGB colors have the film thickness. Accordingly, the light of each of RGB colors emitted externally after passing through the color filter exhibits a local maximum of light-extraction efficiency.Type: GrantFiled: November 24, 2010Date of Patent: December 9, 2014Assignee: Panasonic CorporationInventors: Keiko Kurata, Noriyuki Matsusue, Kazuhiro Yoneda
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Patent number: 8853716Abstract: To increase light-extraction efficiency and simplify manufacturing process. An organic EL panel includes: first electrode reflecting incident light; second electrode transmitting incident light therethrough; organic light-emitting layer emitting light of corresponding color among R, G, and B colors; first functional layer including charge injection/transport layer and at least one other layer, and disposed between the first electrode and the light-emitting layer; and second functional layer disposed between the second electrode and the light-emitting layer. The charge injection/transport layers of R and G colors are equal in film thickness, and differ in film thickness from the charge injection/transport layer of the B color, the at least one other layers of R, G, and B colors are equal in film thickness, the second functional layers of R, G, and B colors are equal in film thickness, and the light-emitting layers of R, G, and B colors differ in film thickness.Type: GrantFiled: November 24, 2010Date of Patent: October 7, 2014Assignee: Panasonic CorporationInventors: Keiko Kurata, Noriyuki Matsusue, Kazuhiro Yoneda
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Patent number: 8847217Abstract: To increase light-extraction efficiency and simplify manufacturing process. An organic EL panel includes: first electrode reflecting incident light; second electrode transmitting incident light therethrough; organic light-emitting layer emitting light of corresponding color among R, G, and B colors; first functional layer including charge injection/transport layer and at least one other layer, and disposed between the first electrode and the light-emitting layer; and second functional layer disposed between the second electrode and the light-emitting layer. The charge injection/transport layers of R, G, and B colors differ in film thickness, the at least one other layers of R, G, and B colors are equal in film thickness to one another, the second functional layers of R, G, and B colors are equal in film thickness to one another, and the light-emitting layers of R and G colors are equal in film thickness, and differ in film thickness from the light-emitting layer of B color.Type: GrantFiled: November 24, 2010Date of Patent: September 30, 2014Assignee: Panasonic CorporationInventors: Keiko Kurata, Noriyuki Matsusue, Kazuhiro Yoneda
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Publication number: 20140203271Abstract: An organic light-emitting panel includes a reflective electrode, a functional layer, having a single or multi-layer structure, located on the reflective electrode, an organic light-emitting layer located on the functional layer, a transparent electrode located above the organic light-emitting layer, a low refractive index layer located on the transparent electrode, and a first thin-film sealing layer located on the low refractive index layer. The low refractive index layer has a lower refractive index than both the transparent electrode and the first thin-film sealing layer. Difference between respective refractive indices of the low refractive index layer and the transparent electrode is 0.4-1.1. Difference between respective refractive indices of the low refractive index layer and the first thin-film sealing layer is 0.1-0.8. The low refractive index layer has thickness of 20-130 nm.Type: ApplicationFiled: July 17, 2012Publication date: July 24, 2014Applicant: PANASONIC CORPORATIONInventors: Kazuhiro Yoneda, Keiko Kurata, Noriyuki Matsusue
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Patent number: 8779453Abstract: A light-emitting element that has an improved light-extraction efficiency and an improved color purity of an emitted light. A light-emitting element includes a reflective electrode, a transparent electrode, a light-emitting layer, a functional layer, and a color filter. An optical film thickness of the functional layer is from approximately 218 nm to approximately 238 nm for a light emitting element that emits a blue light. An optical film thickness of the functional layer is from approximately 384 nm to approximately 400 nm for a light emitting element that emits a red light.Type: GrantFiled: January 30, 2012Date of Patent: July 15, 2014Assignee: Panasonic CorporationInventors: Keiko Kurata, Seiji Nishiyama, Takashi Isobe
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Patent number: 8680542Abstract: An organic light-emitting element includes a reflective anode, a first functional layer, an organic light-emitting layer that emits blue light, a second functional layer, a transparent cathode, and a coating layer. An optical thickness of the first functional layer is greater than 0 nm but not greater than 316 nm. A difference in refractive index between the transparent cathode and either a layer adjacent to the transparent cathode within the second functional layer or a layer adjacent to the transparent cathode within the coating layer is from 0.1 to 0.7 inclusive. The transparent cathode has a physical thickness greater than 0 nm but not greater than 70 nm, a refractive index from 2.0 to 2.4 inclusive, and an optical thickness greater than 0 nm but not greater than 168 nm.Type: GrantFiled: November 2, 2011Date of Patent: March 25, 2014Assignee: Panasonic CorporationInventors: Keiko Kurata, Noriyuki Matsusue, Kazuhiro Yoneda
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Publication number: 20130285023Abstract: To increase light-extraction efficiency and simplify manufacturing process. An organic EL panel includes: first electrode reflecting incident light; second electrode transmitting incident light therethrough; organic light-emitting layer emitting light of corresponding color among RGB colors; first functional layer including charge injection/transport layer and at least one other layer, and disposed between the first electrode and the light-emitting layer; and second functional layer disposed between the second electrode and the light-emitting layer. The first functional layers of the RGB colors are equal in film thickness, the organic light-emitting layers of the RGB colors are equal in optical distance from the first electrode, the second functional layers of the RGB colors are equal in film thickness, the organic light-emitting layers of the RGB colors are equal in optical distance from the second electrode, and the organic light-emitting layers of the RGB colors differ in film thickness.Type: ApplicationFiled: November 24, 2010Publication date: October 31, 2013Applicant: PANASONIC CORPORATIONInventors: Keiko Kurata, Noriyuki Matsusue, Kazuhiro Yoneda
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Publication number: 20130234129Abstract: An organic EL panel comprises anodes, a cathode, organic light-emitting layers, and first functional layers each including a hole injection layer and a hole transport layer. The hole injection layer of each of the R, G, and B colors is made of only a metal oxide including tungsten oxide, and has a thickness of 5 nm to 40 nm. At least one of the hole injection layers has a thickness different from the other hole injection layers. The hole transport layers of the R, G, and B colors are equivalent in thickness. The organic light-emitting layers of the R, G, and B colors are equivalent in thickness.Type: ApplicationFiled: November 29, 2010Publication date: September 12, 2013Applicant: PANASONIC CORPORATIONInventors: Ryuuta Yamada, Keiko Kurata, Shinya Fujimura, Hirofumi Fujita, Yoshiaki Tsukamoto, Takahiro Komatsu, Satoru Ohuchi
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Publication number: 20130193427Abstract: To increase light-extraction efficiency and simplify manufacturing process. An organic EL panel includes: first electrode reflecting incident light; second electrode transmitting incident light therethrough; organic light-emitting layer emitting light of corresponding color among R, G, and B colors; first functional layer including charge injection/transport layer and at least one other layer, and disposed between the first electrode and the light-emitting layer; and second functional layer disposed between the second electrode and the light-emitting layer. The charge injection/transport layers of R and G colors are equal in film thickness, and differ in film thickness from the charge injection/transport layer of the B color, the at least one other layers of R, G, and B colors are equal in film thickness, the second functional layers of R, G, and B colors are equal in film thickness, and the light-emitting layers of R, G, and B colors differ in film thickness.Type: ApplicationFiled: November 24, 2010Publication date: August 1, 2013Applicant: PANASONIC CORPORATIONInventors: Keiko Kurata, Noriyuki Matsusue, Kazuhiro Yoneda
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Publication number: 20130153883Abstract: To increase light-extraction efficiency and simplify manufacturing process. An organic EL panel includes: first electrode reflecting incident light; second electrode transmitting incident light therethrough; organic light-emitting layer emitting light of corresponding color among R, G, and B colors; first functional layer including charge injection/transport layer and at least one other layer, and disposed between the first electrode and the light-emitting layer; and second functional layer disposed between the second electrode and the light-emitting layer. The charge injection/transport layers of R, G, and B colors differ in film thickness, the at least one other layers of R, G, and B colors are equal in film thickness to one another, the second functional layers of R, G, and B colors are equal in film thickness to one another, and the light-emitting layers of R and G colors are equal in film thickness, and differ in film thickness from the light-emitting layer of B color.Type: ApplicationFiled: November 24, 2010Publication date: June 20, 2013Applicant: PANASONIC CORPORATIONInventors: Keiko Kurata, Noriyuki Matsusue, Kazuhiro Yoneda
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Publication number: 20130146861Abstract: An organic EL panel includes first electrode, second electrode; organic light-emitting layer of each of RGB colors, and functional layer disposed between the first electrode and the light-emitting layer. The functional layers of RGB colors have the same film thickness. Film thickness of each of the functional layers of RG colors corresponds to a first local maximum of light-extraction efficiency of light before passing through a color filter, and film thickness of the functional layer of B color corresponds to a value of light-extraction efficiency smaller than a first local maximum of light-extraction efficiency of light before passing through a color filter. The light-emitting layers of RGB colors differ in film thickness, such that the functional layers of RGB colors have the film thickness. Accordingly, the light of each of RGB colors emitted externally after passing through the color filter exhibits a local maximum of light-extraction efficiency.Type: ApplicationFiled: November 24, 2010Publication date: June 13, 2013Applicant: PANASONIC CORPORATIONInventors: Keiko Kurata, Noriyuki Matsusue, Kazuhiro Yoneda
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Publication number: 20120241780Abstract: An organic EL panel includes reflective electrodes, a transparent electrode, organic light-emitting layers, and functional layers that are each provided between a corresponding one of the reflective electrodes and a corresponding one of the respective organic light-emitting layers. The film thicknesses of the respective functional layers of R, G, and B colors are each 60 nm or less such that a local maximum of light-emitting efficiency for a corresponding color is exhibited, and are substantially equal to each other. The optical distances between the respective organic light-emitting layers of the R, G, and B colors and the respective reflective electrodes are each 100 nm or less, and are substantially equal to each other.Type: ApplicationFiled: June 5, 2012Publication date: September 27, 2012Applicant: PANASONIC CORPORATIONInventors: Keiko KURATA, Noriyuki MATSUSUE, Kazuhiro YONEDA
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Publication number: 20120126272Abstract: A light-emitting element that has an improved light-extraction efficiency and an improved color purity of an emitted light. A light-emitting element includes a reflective electrode, a transparent electrode, a light-emitting layer, a functional layer, and a color filter. An optical film thickness of the functional layer is from approximately 218 nm to approximately 238 nm for a light emitting element that emits a blue light. An optical film thickness of the functional layer is from approximately 384 nm to approximately 400 nm for a light emitting element that emits a red light.Type: ApplicationFiled: January 30, 2012Publication date: May 24, 2012Applicant: PANASONIC CORPORATIONInventors: Keiko KURATA, Seiji NISHIYAMA, Takashi ISOBE
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Publication number: 20120104423Abstract: An organic light-emitting element includes a reflective anode, a first functional layer, an organic light-emitting layer that emits blue light, a second functional layer, a transparent cathode, and a coating layer. An optical thickness of the first functional layer is greater than 0 nm but not greater than 316 nm. A difference in refractive index between the transparent cathode and either a layer adjacent to the transparent cathode within the second functional layer or a layer adjacent to the transparent cathode within the coating layer is from 0.1 to 0.7 inclusive. The transparent cathode has a physical thickness greater than 0 nm but not greater than 70 nm, a refractive index from 2.0 to 2.4 inclusive, and an optical thickness greater than 0 nm but not greater than 168 nm.Type: ApplicationFiled: November 2, 2011Publication date: May 3, 2012Applicant: PANASONIC CORPORATIONInventors: Keiko KURATA, Noriyuki MATSUSUE, Kazuhiro YONEDA