Patents by Inventor Kenji Okumoto
Kenji Okumoto 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: 8278804Abstract: A multicolor light-emitting organic electroluminescent (EL) display device including a plurality of organic EL light-emitting regions including a red light-emitting layer, a green light-emitting layer, and a blue light-emitting layer on a main substrate includes: a magenta color filter, as a first light-adjusting layer, having predetermined transmission property for blue light and red light; and a second light-adjusting layer having predetermined absorption property for light with a wavelength intermediate between the red light and green light, wherein the magenta color filter is laid over the blue light-emitting layer, the red light-emitting layer, and a bank which is a non light-emitting region, and the second light-adjusting layer is laid over the blue light-emitting layer, the green light-emitting layer, the red light-emitting layer, and the bank which is the non light-emitting region.Type: GrantFiled: December 20, 2011Date of Patent: October 2, 2012Assignee: Panasonic CorporationInventors: Masafumi Matsui, Kouhei Koresawa, Takashi Ohta, Kenji Okumoto
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Publication number: 20120218173Abstract: A display panel apparatus includes pixels. Each pixel includes an organic luminescent layer between an upper electrode and a lower electrode and is configured to emit a red, a green, or a blue light. A glass substrate is above the upper electrode. A lens sheet is between the pixels and the glass substrate and includes lenses and a base. Each lens corresponds to a pixel and protrudes from the base. Partitions are between the glass substrate and the lens sheet for partitioning the lenses. The partitions have a first height that is greater than a second height of the lenses. The base includes trenches between the lenses. The trenches are recessed in a direction opposite the lenses. The partitions are in the trenches. Each partition has a cross-section that includes an upper side that has a different length than a bottom side and lateral sides that are tilted.Type: ApplicationFiled: May 8, 2012Publication date: August 30, 2012Applicant: PANASONIC CORPORATIONInventors: Takashi OHTA, Masahiro KASANO, Kenji OKUMOTO
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Patent number: 8242516Abstract: An organic EL display panel is provided which includes: a substrate which includes a plurality of luminescent regions which are arranged side by side in a specific direction and run in parallel to one another; a bank formed over the substrate, the bank defining a plurality of coating regions in each of the luminescent regions, the coating regions being aligned in a row along the long axis of the luminescent region; and a pixel electrode provided in each of the coating regions, the pixel electrode having a long axis which is in parallel with the long axis of the luminescent region, wherein, in each of the luminescent regions, the coating region positioned at a lengthwise end of the luminescent region is larger in size than the coating region positioned at a lengthwise center of the luminescent region.Type: GrantFiled: August 17, 2009Date of Patent: August 14, 2012Assignee: Panasonic CorporationInventors: Hidehiro Yoshida, Kenji Okumoto, Keisei Yamamuro
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Publication number: 20120199856Abstract: An organic electro-luminescence (EL) display device according to the present invention includes: a main substrate; a display section provided above the main substrate and including a red light-emitting layer, a green light-emitting layer, a blue light-emitting layer, and a bank; a blue color filter provided above the display section, which selectively transmits blue light and selectively absorbs green light and red light; and a red color filter provided above the display section, which selectively transmits the red light and selectively absorbs the blue light and the green light, wherein the blue color filter has openings each at a position corresponding to the red light-emitting layer or the green light-emitting layer, and the red color filter has openings each at a position corresponding to the green light-emitting layer or the blue light-emitting layer.Type: ApplicationFiled: April 19, 2012Publication date: August 9, 2012Applicant: PANASONIC CORPORATIONInventors: Kouhei KORESAWA, Masafumi MATSUI, Kenji OKUMOTO
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Publication number: 20120168787Abstract: An organic electroluminescent display device which satisfies all of chromatic purity, transmission factor, reduction in reflection, and reflected color in balance at low cost is provided. An organic electroluminescent (EL) display device includes: a main substrate; an organic light-emitting layer formed above the main substrate and including a red light-emitting layer which emits red light, a green light-emitting layer which emits green light, a blue light-emitting layer which emits blue light, and a bank which is a non-light emitting region; a first light-adjusting layer formed above the blue light-emitting layer and the bank, which selectively transmits the blue light and selectively absorbs the green light and the red light; and a second light-adjusting layer formed above the red light-emitting layer and the green light-emitting layer, which selectively absorbs the blue light and selectively transmits the green light and the red light.Type: ApplicationFiled: March 6, 2012Publication date: July 5, 2012Applicant: PANASONIC CORPORATIONInventors: Kenji OKUMOTO, Masafumi MATSUI, Kouhei KORESAWA
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Patent number: 8203158Abstract: An organic EL display panel comprising a substrate and an organic light-emitting element R emitting red light, an organic light-emitting element G emitting green light and an organic light-emitting element B emitting blue light which are arranged on the substrate, wherein each of the organic light-emitting element has a concavely curved pixel electrode which is a reflective electrode, a functional layer formed with coating over the pixel electrode, an organic light emitting layer arranged on the functional layer, a counter electrode which is a transparent electrode arranged over the organic light emitting layer and a bank defining the functional layer formed with coating, the element R, the element G and the element B have different amount of the functional layer and the element R, the element G and the element B have different curvature radius of the concavely curved pixel electrode.Type: GrantFiled: June 21, 2010Date of Patent: June 19, 2012Assignee: Panasonic CorporationInventors: Hidehiro Yoshida, Kenji Okumoto
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Patent number: 8178870Abstract: An organic electroluminescence element includes an anode and a transparent electrode cathode. An organic luminescent layer is located between the anode and the cathode. An electron injection layer is located between the cathode and the organic luminescent layer, and includes at least one of an alkali metal and an alkali earth metal to inject electrons into the organic luminescent layer. A cathode buffer layer is located between the electron injection layer and the cathode, and includes a hole-transporting organic material.Type: GrantFiled: April 14, 2009Date of Patent: May 15, 2012Assignee: Panasonic CorporationInventor: Kenji Okumoto
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Publication number: 20120112217Abstract: Disclosed is an organic EL display panel provided with a substrate and a plurality of sub-pixels that are disposed in a matrix upon the substrate, wherein: the sub-pixels comprise sub-pixels that emit red light, sub-pixels that emit green light, and sub-pixels that emit blue light; the sub-pixels are each provided with a pixel electrode that is disposed upon the substrate, an organic functional layer that is formed by coating upon the pixel electrode, a counter electrode that is disposed upon the organic functional layer, and a bank that defines the space in which the organic functional layer is formed; the sub-pixels include sub-pixels (X) that are disposed on at least one section of the edge of the substrate, and sub-pixels (Y) that are disposed in the center of the substrate and that emit light with the same color as the sub-pixels (X); the volume of the organic functional layer provided in the sub-pixels (X) is larger than the volume of the organic functional layer provided in the sub-pixels (Y); and theType: ApplicationFiled: June 11, 2010Publication date: May 10, 2012Applicant: PANASONIC CORPORATIONInventors: Hidehiro Yoshida, Kenji Okumoto
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Publication number: 20120086332Abstract: A multicolor light-emitting organic electroluminescent (EL) display device including a plurality of organic EL light-emitting regions including a red light-emitting layer, a green light-emitting layer, and a blue light-emitting layer on a main substrate includes: a magenta color filter, as a first light-adjusting layer, having predetermined transmission property for blue light and red light; and a second light-adjusting layer having predetermined absorption property for light with a wavelength intermediate between the red light and green light, wherein the magenta color filter is laid over the blue light-emitting layer, the red light-emitting layer, and a bank which is a non light-emitting region, and the second light-adjusting layer is laid over the blue light-emitting layer, the green light-emitting layer, the red light-emitting layer, and the bank which is the non light-emitting region.Type: ApplicationFiled: December 20, 2011Publication date: April 12, 2012Applicant: PANASONIC CORPORATIONInventors: Masafumi MATSUI, Kouhei KORESAWA, Takashi OHTA, Kenji OKUMOTO
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Patent number: 8153275Abstract: It is an object of the present invention to provide an organic electroluminescent element having a longer lifetime. In order to accomplish the object, an organic electroluminescent element adapted to comprise a light emitting layer including an organic material between an anode and a cathode is provided with a hole transport layer for transporting holes injected from the anode toward the light emitting layer. Along with the hole transport layer, an intermediate layer having an energy level of a lowest unoccupied molecular orbital lower than those of the hole transport layer and the light emitting layer is provided therebetween.Type: GrantFiled: June 29, 2006Date of Patent: April 10, 2012Assignee: Sanyo Electric Co., Ltd.Inventors: Yuji Hamada, Haruhisa Hashimoto, Masahiro Iyori, Kazuki Nishimura, Kenji Okumoto, Masaya Nakai
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Publication number: 20120080694Abstract: Disclosed is a coated type organic EL display wherein the light extraction efficiencies of all organic light-emitting elements are improved even when the organic light-emitting elements have different organic light-emitting layers for respective emission colors. Specifically disclosed is an organic EL display which comprises a substrate, a red organic light-emitting element (R), a green organic light-emitting element (G), and a blue organic light-emitting element (B), said organic light-emitting elements being arranged on the substrate. Each of the organic light-emitting elements has a pixel electrode that is a reflective electrode, a functional layer that is formed on the pixel electrode by coating, an organic light-emitting layer that is arranged on the functional layer, a counter electrode that is a transparent electrode arranged on the organic light-emitting layer, and a tapered bank that defines the functional layer formed by coating.Type: ApplicationFiled: May 18, 2010Publication date: April 5, 2012Applicant: PANASONIC CORPORATIONInventors: Hidehiro Yoshida, Kenji Okumoto, Tsuneyuki Ejima, Shuhei Nakatani
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Publication number: 20120074397Abstract: An organic electroluminescence display includes a first electrode and an auxiliary wire each either on or in a substrate. A luminescent layer is over the first electrode, and a hole transport layer is between the luminescent layer and the first electrode. The hole transport layer extends from over the first electrode to over the auxiliary wire. A second electrode is over the luminescent layer and extends from over the first electrode to over the auxiliary wire. A metal layer is over the auxiliary wire between the hole transport layer and the second electrode. The second electrode and the auxiliary wire are electrically connected via the hole transport layer and the metal layer. The metal layer comprises a metal, wherein a difference of a work function value of the metal minus an absolute value of an energy level of a lowest unoccupied molecular orbit of the hole transport layer is at most approximately 0.5 eV.Type: ApplicationFiled: December 7, 2011Publication date: March 29, 2012Applicant: PANASONIC CORPORATIONInventor: Kenji OKUMOTO
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Publication number: 20120025699Abstract: An organic EL display device including organic EL light-emitting regions which includes a red-light emitting layer, a green-light emitting layer, and a blue-light emitting layer that are arranged on a main substrate includes: a first light-adjusting layer including a first portion and a second portion, the first portion selectively transmitting desired blue light, and the second portion absorbing visible light other than at least the desired blue light; and a second light-adjusting layer selectively absorbing light with a wavelength between desired red light and desired green light at an entire surface, in which the blue light-emitting layer is overlaid with the first portion, and a bank which is a non-light emitting portion is overlaid with the second portion. The first portion and the second portion may be integrally formed of a same material, and the second portion may absorb an entire range of visible light.Type: ApplicationFiled: October 4, 2011Publication date: February 2, 2012Applicant: PANASONIC CORPORATIONInventors: Kenji OKUMOTO, Masafumi MATSUI, Takashi OHTA, Kouhei KORESAWA
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Patent number: 8094096Abstract: An organic electroluminescence display includes a first electrode and an auxiliary wire each either on or in a substrate. A luminescent layer is over the first electrode, and a hole transport layer is between the luminescent layer and the first electrode. The hole transport layer extends from over the first electrode to over the auxiliary wire. A second electrode is over the luminescent layer and extends from over the first electrode to over the auxiliary wire. A metal layer is over the auxiliary wire between the hole transport layer and the second electrode. The second electrode and the auxiliary wire are electrically connected via the hole transport layer and the metal layer. The metal layer comprises a metal, wherein a difference of a work function value of the metal minus an absolute value of an energy level of a lowest unoccupied molecular orbit of the hole transport layer is at most approximately 0.5 eV.Type: GrantFiled: August 12, 2010Date of Patent: January 10, 2012Assignee: Panasonic CorporationInventor: Kenji Okumoto
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Publication number: 20110260955Abstract: An organic EL light emitting device is provided with: a substrate having a coloring region where two or more pixel regions are arranged in a line; line-shaped main banks which define the coloring region and face each other; pixel separation regions arranged among the pixel regions in the coloring region; a pixel electrode arranged for each of the pixel regions; and organic function layers arranged on the pixel electrodes.Type: ApplicationFiled: October 22, 2009Publication date: October 27, 2011Applicant: PANASONIC CORPORATIONInventors: Hidehiro Yoshida, Kenji Okumoto, Keisei Yamamuro
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Publication number: 20110198990Abstract: Disclosed is an organic EL display panel which includes: a substrate; a plurality of linear luminescent regions formed on the substrate, the luminescent regions running in parallel to one another; and two or more sub-pixels arranged in a row in each of the luminescent regions; wherein the luminescent regions include a luminescent region having the sub-pixels emitting red light, a luminescent region having the sub-pixels emitting green light, and a luminescent region having the sub-pixels emitting blue light, each of the sub-pixels includes a pixel electrode disposed on the substrate, an organic functional layer disposed on the pixel electrode by coating, a counter electrode disposed on the organic functional layer, and a forward tapered bank which constitutes wall surfaces of a region in which the organic functional layer is formed, and when an inclination angle of the wall surface of the region on the substrate edge side is defined as inclination angle ?, and an inclination angle of the wall surface of the rType: ApplicationFiled: June 24, 2010Publication date: August 18, 2011Applicant: PANASONIC CORPORATIONInventors: Hidehiro Yoshida, Kenji Okumoto
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Publication number: 20110156079Abstract: A manufacturing method of an organic EL device, comprising: providing a substrate on which a pixel electrode is arranged, forming a liquid repellent organic film on the substrate and the pixel electrode, radiating a light selectively to an area of the pixel electrode to be coated with an organic functional layer, to oxidize a surface of the pixel electrode, and to change the liquid repellent organic film on the area to a lyophilic organic film or to remove the liquid repellent organic film on the area, applying an ink containing an organic functional material on the area defined by the liquid repellent organic film to form the organic functional layer on the pixel electrode.Type: ApplicationFiled: September 1, 2009Publication date: June 30, 2011Applicant: PANASONIC CORPORATIONInventors: Shuhei Nakatani, Kenji Okumoto, Kiyohiko Takagi
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Publication number: 20110101317Abstract: A method of manufacturing an electronic device comprises: providing a base comprising circuit elements; forming a double bank well-defining structure over the base, comprising a first layer of insulating material and a second layer of insulating material thereover; and depositing a solution of organic material in the well defined by the double bank structure. The double bank well-defining structure is formed by removing material from the first and second layers in a single processing step to form the well. The first layer is made of a material which is removed at a faster rate than material of the second layer to form an overhanging step structure in which the second layer protrudes out over an edge of the first layer.Type: ApplicationFiled: March 13, 2009Publication date: May 5, 2011Applicant: Cambridge Display Technology LimitedInventors: John James Gregory, Barry Wild, Hidehiro Yoshida, Kenji Okumoto
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Publication number: 20110042703Abstract: The organic electroluminescence element includes a substrate and an anode metal layer above the substrate. The anode metal layer includes an inner region between a pair of outer regions. A metal oxide layer is above the inner region and the outer regions of the anode metal layer. An insulating layer is above the metal oxide layer and the outer regions of the anode metal layer. A hole transport layer is above the metal oxide layer and the inner region of the anode metal layer. An organic luminescent layer is above the hole transport layer. A cathode layer is above the organic luminescent layer for injecting electrons into the organic luminescent layer. A thickness of the metal oxide layer on the inner region of the anode metal layer is greater than a thickness of the metal oxide layer on the outer regions of the anode metal layer.Type: ApplicationFiled: November 1, 2010Publication date: February 24, 2011Applicant: PANASONIC CORPORATIONInventors: Kenji OKUMOTO, Hidehiro YOSHIDA
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Publication number: 20100327297Abstract: An organic EL display panel comprising a substrate and an organic light-emitting element R emitting red light, an organic light-emitting element G emitting green light and an organic light-emitting element B emitting blue light which are arranged on the substrate, wherein each of the organic light-emitting element has a concavely curved pixel electrode which is a reflective electrode, a functional layer formed with coating over the pixel electrode, an organic light emitting layer arranged on the functional layer, a counter electrode which is a transparent electrode arranged over the organic light emitting layer and a bank defining the functional layer formed with coating, the element R, the element G and the element B have different amount of the functional layer and the element R, the element G and the element B have different curvature radius of the concavely curved pixel electrode.Type: ApplicationFiled: June 21, 2010Publication date: December 30, 2010Applicant: PANASONIC CORPORATIONInventors: Hidehiro YOSHIDA, Kenji OKUMOTO