Patents by Inventor Yoshiaki Sakamoto
Yoshiaki Sakamoto 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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Publication number: 20240034064Abstract: An inkjet head includes: an ink supply part configured to supply an ink; a nozzle plate connected to the ink supply part and having a nozzle configured to drop the ink provided from the ink supply part; a nozzle plate heating part adjacent to the nozzle plate and configured to heat the nozzle plate; and an insulation member between the nozzle plate and the ink supply part.Type: ApplicationFiled: July 13, 2023Publication date: February 1, 2024Inventor: Yoshiaki SAKAMOTO
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Publication number: 20230268463Abstract: A display device comprises a first electrode and a second electrode disposed to be spaced apart from each other on a substrate, a light emitting element disposed between the first electrode and the second electrode, including a first end and a second end, an insulating layer disposed on the light emitting element, including a fixing portion disposed on at least a portion of the light emitting element and a partition portion surrounding the light emitting element, a first connection electrode electrically contacting the first end of the light emitting element, and a second connection electrode electrically contacting the second end of the light emitting element. A width of an upper surface of each of the fixing portion and the partition portion is greater than a width of a lower surface of each of the fixing portion and the partition portion.Type: ApplicationFiled: October 4, 2022Publication date: August 24, 2023Applicant: Samsung Display Co., LTD.Inventor: Yoshiaki SAKAMOTO
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Patent number: 9054342Abstract: Provided are an apparatus and method for etching an organic layer, in which an organic material deposited in a non-layer forming area of a substrate is etched. The apparatus includes an etching chamber; a plasma generator configured to supply plasma into the etching chamber; a stage disposed in the etching chamber and configured to support the substrate; and a mask configured to guide the plasma toward the non-pixel area.Type: GrantFiled: September 17, 2013Date of Patent: June 9, 2015Assignee: Samsung Display Co., Ltd.Inventors: Yoshiaki Sakamoto, Nam Ha
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Publication number: 20140357087Abstract: Provided are an apparatus and method for etching an organic layer, in which an organic material deposited in a non-layer forming area of a substrate is etched. The apparatus includes an etching chamber; a plasma generator configured to supply plasma into the etching chamber; a stage disposed in the etching chamber and configured to support the substrate; and a mask configured to guide the plasma toward the non-pixel area.Type: ApplicationFiled: September 17, 2013Publication date: December 4, 2014Applicant: Samsung Display Co., Ltd.Inventors: Yoshiaki SAKAMOTO, Nam Ha
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Patent number: 8093805Abstract: In an organic electroluminescent display device comprising a wiring layer, an insulating layer, a first electrode, an organic electroluminescent layer, and a second electrode, wiring which conducts with a second electrode is arranged between light emitting pixels, and is provided either between an organic electroluminescent layer and the second electrodes, or on top of the second electrodes.Type: GrantFiled: May 26, 2006Date of Patent: January 10, 2012Assignee: Fujifilm CorporationInventors: Yoshiaki Sakamoto, Toshiro Takahashi
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Patent number: 7935433Abstract: An object of the present invention is to enable suppression of a leak current of an organic EL element while improving a conductivity of the organic EL element and suppressing an operation voltage thereof. An organic EL element is used which comprises at least a luminescent layer, a hole transport layer adjacent to a positive-electrode side of the luminescent layer, and an electron injection transport layer adjacent to a negative-electrode side of the luminescent layer, wherein a hole injection layer is provided between the hole transport layer and the positive electrode, and the conductivity of the hole injection layer continuously changes along a thickness direction of the hole injection layer.Type: GrantFiled: December 25, 2003Date of Patent: May 3, 2011Assignee: Fujifilm CorporationInventors: Yuichiro Itai, Tasuku Satoh, Yoshiaki Sakamoto, Toshiro Takahashi, Masaru Kinoshita
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Publication number: 20110074272Abstract: The present invention provides an optical member which is disposed on the light emitting side of an organic light-emitting display device having at least a light reflective electrode and an organic EL layer, the optical member including: a light transmissive substrate, and a light transmissive layer which is formed on the light transmissive substrate and which has concave portions, wherein the optical member is disposed on the light emitting side of the organic light-emitting display device, the optical member enabling to from an optical resonator between the light reflective electrode in the organic light-emitting display device and surfaces of the concave portions opposite to the light reflective electrode, and wherein the optical resonator emits light of at least one color light selected from a red light, a green light and a blue light.Type: ApplicationFiled: September 23, 2010Publication date: March 31, 2011Inventors: Yoshiaki Sakamoto, Yosuke Takeuchi, Hiroyuki Hiiro
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Patent number: 7743477Abstract: A manufacturing method for a multi-nozzle ink jet head using piezoelectric elements. The head has a nozzle member in which a plurality of nozzles are formed, a pressure chamber wall member in which a plurality of pressure chambers are formed, and piezoelectric type actuators that have a diaphragm and a plurality of piezo elements and apply pressure to each of the plurality of pressure chambers for ejecting ink from the nozzles. A coating member having high rigidity is provided on inner surfaces of the pressure chamber walls or on parts of the diaphragm in contact with the pressure chamber wall member, thus increasing the rigidity of the pressure chamber walls.Type: GrantFiled: August 4, 2008Date of Patent: June 29, 2010Assignee: Fuji Photo Film Co., Ltd.Inventors: Yoshiaki Sakamoto, Shuji Koike, Tomohisa Shingai
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Patent number: 7709804Abstract: A radiation detector includes a substrate, a lower electrode disposed on the substrate, a radiation detecting layer formed on the upper surface of the lower electrode, an upper electrode formed on the upper surface of the radiation detecting layer, a protection layer which is formed on the upper electrode, whose end portion extends to an end surface of the substrate and which covers the upper electrode, and a reinforcement member which is formed from the lower surface of the substrate to the surface of the protection layer and which covers the end portion of the protection layer.Type: GrantFiled: July 21, 2008Date of Patent: May 4, 2010Assignee: FUJIFILM CorporationInventors: Yoshiaki Sakamoto, Futoshi Yoshida, Takashi Shoji, Takeshi Asano
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Publication number: 20100053038Abstract: A color display including a plurality of pixels on a substrate, each pixels being area-divided into plural sub-pixels including at least two sub-pixels that each emit colored light of different wavelengths and a white sub-pixel, wherein the at least two sub-pixels and the white sub-pixel each have at least an optical path length-adjusting layer and an organic electroluminescence layer interposed between a layer that partially transmits light and partially reflects light and a light reflection layer to form a resonator structure.Type: ApplicationFiled: July 21, 2009Publication date: March 4, 2010Applicant: FUJIFILM CORPORATIONInventor: Yoshiaki SAKAMOTO
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Publication number: 20100053043Abstract: A color display using an organic electroluminescence element, includes, on a substrate, plural pixels each being area-divided into plural sub-pixels including at least two sub-pixels that each emit colored light of different wavelengths and a white sub-pixel, in which the white sub-pixel is further area-divided into at least two sub-sub-pixels that each emit colored light of different wavelengths, wherein the at least two sub-pixels and the at least two sub-sub-pixels each have an organic electroluminescence layer that emits a white light and a color filter. A color display which allows a high definition color display and is easily produced, and a method for producing the color display are provided.Type: ApplicationFiled: July 21, 2009Publication date: March 4, 2010Applicant: FUJIFILM CORPORATIONInventor: Yoshiaki SAKAMOTO
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Patent number: 7611232Abstract: A multi-nozzle ink jet head having a diaphragm that effectively utilizes the force generated by thin-film piezoelectric elements is disclosed. The head (2) has a head substrate (28) in which are formed a plurality of nozzles (39) and a plurality of pressure chambers (29), a multi-layer diaphragm (23-1, 23-2), piezoelectric elements (27), and individual electrodes (26). By making the thickness of the common electrode layer (23-1) of the multi-layer diaphragm be thin but such that problems do not occur during multi-pin driving, optimization of the rigid layer becomes possible, and hence it is possible to use the force generated by the thin-film piezoelectric elements efficiently in ink ejection.Type: GrantFiled: December 21, 2006Date of Patent: November 3, 2009Assignee: Fuji Photo Film Co., Ltd.Inventors: Shuji Koike, Yoshiaki Sakamoto, Tomohisa Shingai
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Patent number: 7607764Abstract: A multi-nozzle ink jet head using piezoelectric elements and a manufacturing method thereof are disclosed. A head (1) has a nozzle member (10) in which a plurality of nozzles (12) are formed, a pressure chamber wall member (14) in which a plurality of pressure chambers (15) are formed, and piezoelectric type actuators that have a diaphragm (18) and a plurality of piezo elements (19) and apply pressure to each of the plurality of pressure chambers for ejecting ink from the nozzles. A rigid coating member (23, 25) is provided on inner surfaces of the pressure chamber walls or on parts of the diaphragm in contact with the pressure chamber wall member, thus increasing the rigidity of the pressure chamber walls.Type: GrantFiled: September 6, 2007Date of Patent: October 27, 2009Assignee: Fuji Photo Film Co., Ltd.Inventors: Yoshiaki Sakamoto, Shuji Koike, Tomohisa Shingai
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Patent number: 7562994Abstract: A lighting apparatus and a display apparatus therewith are disclosed. The lighting apparatus includes a first light-transmitting electrode layer, a second light-transmitting electrode layer, and a luminous layer that is sandwiched by the first and the second light-transmitting electrode layers. At least one of the first and the second light-transmitting electrode layers includes at least a first conductive member and a second conductive member. Layout patterns of the first and the second conductive members are different from each other.Type: GrantFiled: June 21, 2005Date of Patent: July 21, 2009Assignee: Fuji Photo Film Co., Ltd.Inventors: Yoshiaki Sakamoto, Toshiro Takahashi, Masaya Nakayama
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Patent number: 7531957Abstract: A display apparatus including a substrate 22; an organic EL device including an electrode 24 which is formed on the substrate 22, an organic EL layer 26 which is formed on the electrode 24, and an electrode 30 which is formed on the organic EL layer 26; an inorganic insulating film 34 which is formed on the organic EL device, sealing the organic EL layer; and a substrate 38 which is formed on the inorganic insulating film 34, wherein the material and the thickness of the substrate 22 and the substrate 38 are set such that the neutral axis when a bending stress is applied is located in the vicinity of the interface between the inorganic insulating film 34 and the substrate 38. By configuring such a display apparatus, occurrence of cracks in the inorganic insulating film is prevented, and the organic EL device can be effectively protected against moisture and oxygen. As a result, the reliability of the display apparatus can be improved.Type: GrantFiled: September 10, 2003Date of Patent: May 12, 2009Assignee: FUJIFILM CorporationInventor: Yoshiaki Sakamoto
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Patent number: 7517061Abstract: A multi-nozzle ink jet head using piezoelectric elements and a manufacturing method thereof are disclosed. A head (1) has a nozzle member (10) in which a plurality of nozzles (12) are formed, a pressure chamber wall member (14) in which a plurality of pressure chambers (15) are formed, and piezoelectric type actuators that have a diaphragm (18) and a plurality of piezo elements (19) and apply pressure to each of the plurality of pressure chambers for ejecting ink from the nozzles. A rigid coating member (23, 25) is provided on inner surfaces of the pressure chamber walls or on parts of the diaphragm in contact with the pressure chamber wall member, thus increasing the rigidity of the pressure chamber walls.Type: GrantFiled: February 28, 2005Date of Patent: April 14, 2009Assignee: Fuji Photo Film Co., Ltd.Inventors: Yoshiaki Sakamoto, Shuji Koike, Tomohisa Shingai
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Publication number: 20090026382Abstract: A radiation detector includes a substrate, a lower electrode disposed on the substrate, a radiation detecting layer formed on the upper surface of the lower electrode, an upper electrode formed on the upper surface of the radiation detecting layer, a protection layer which is formed on the upper electrode, whose end portion extends to an end surface of the substrate and which covers the upper electrode, and a reinforcement member which is formed from the lower surface of the substrate to the surface of the protection layer and which covers the end portion of the protection layer.Type: ApplicationFiled: July 21, 2008Publication date: January 29, 2009Applicant: FUJIFILM CORPORATIONInventors: Yoshiaki Sakamoto, Futoshi Yoshida, Takashi Shoji, Takeshi Asano
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Publication number: 20080295309Abstract: A multi-nozzle ink jet head using piezoelectric elements and a manufacturing method thereof are disclosed. A head (1) has a nozzle member (10) in which a plurality of nozzles (12) are formed, a pressure chamber wall member (14) in which a plurality of pressure chambers (15) are formed, and piezoelectric type actuators that have a diaphragm (18) and a plurality of piezo elements (19) and apply pressure to each of the plurality of pressure chambers for ejecting ink from the nozzles. A rigid coating member (23, 25) is provided on inner surfaces of the pressure chamber walls or on parts of the diaphragm in contact with the pressure chamber wall member, thus increasing the rigidity of the pressure chamber walls.Type: ApplicationFiled: August 4, 2008Publication date: December 4, 2008Applicant: FUJI PHOTO FILM CO., LTD.Inventors: Yoshiaki Sakamoto, Shuji Koike, Tomohisa Shingai
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Patent number: 7425058Abstract: A multi-nozzle ink jet head using piezoelectric elements and a manufacturing method thereof are disclosed. A head (1) has a nozzle member (10) in which a plurality of nozzles (12) are formed, a pressure chamber wall member (14) in which a plurality of pressure chambers (15) are formed, and piezoelectric type actuators that have a diaphragm (18) and a plurality of piezo elements (19) and apply pressure to each of the plurality of pressure chambers for ejecting ink from the nozzles. A rigid coating member (23, 25) is provided on inner surfaces of the pressure chamber walls or on parts of the diaphragm in contact with the pressure chamber wall member, thus increasing the rigidity of the pressure chamber walls.Type: GrantFiled: February 28, 2005Date of Patent: September 16, 2008Assignee: Fuji Photo Film Co., Ltd.Inventors: Yoshiaki Sakamoto, Shuji Koike, Tomohisa Shingai
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Patent number: 7368868Abstract: A display device having a bottom emission type, active matrix organic EL panel that efficiently secures a sufficient aperture ratio, has pixel arrangement in which the aperture ratio is not a trade off for higher resolution, and can operate with reduced power consumption and contribute to downsizing of the driving circuit and the device as a whole. The display device includes an active matrix organic EL panel having first and second electrodes provided on a substrate and an organic EL light emitting layer provided between the first and second electrodes. The organic EL light emitting layer includes a light emitting region, a plurality of the light emitting regions are arranged such that adjacent ones of the light emitting regions do not contact each other.Type: GrantFiled: March 18, 2005Date of Patent: May 6, 2008Assignee: FUJIFILM CorporationInventor: Yoshiaki Sakamoto