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).

  • Publication number: 20240034064
    Abstract: 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: Application
    Filed: July 13, 2023
    Publication date: February 1, 2024
    Inventor: Yoshiaki SAKAMOTO
  • Publication number: 20230268463
    Abstract: 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: Application
    Filed: October 4, 2022
    Publication date: August 24, 2023
    Applicant: Samsung Display Co., LTD.
    Inventor: Yoshiaki SAKAMOTO
  • Patent number: 9054342
    Abstract: 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: Grant
    Filed: September 17, 2013
    Date of Patent: June 9, 2015
    Assignee: Samsung Display Co., Ltd.
    Inventors: Yoshiaki Sakamoto, Nam Ha
  • Publication number: 20140357087
    Abstract: 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: Application
    Filed: September 17, 2013
    Publication date: December 4, 2014
    Applicant: Samsung Display Co., Ltd.
    Inventors: Yoshiaki SAKAMOTO, Nam Ha
  • Patent number: 8093805
    Abstract: 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: Grant
    Filed: May 26, 2006
    Date of Patent: January 10, 2012
    Assignee: Fujifilm Corporation
    Inventors: Yoshiaki Sakamoto, Toshiro Takahashi
  • Patent number: 7935433
    Abstract: 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: Grant
    Filed: December 25, 2003
    Date of Patent: May 3, 2011
    Assignee: Fujifilm Corporation
    Inventors: Yuichiro Itai, Tasuku Satoh, Yoshiaki Sakamoto, Toshiro Takahashi, Masaru Kinoshita
  • Publication number: 20110074272
    Abstract: 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: Application
    Filed: September 23, 2010
    Publication date: March 31, 2011
    Inventors: Yoshiaki Sakamoto, Yosuke Takeuchi, Hiroyuki Hiiro
  • Patent number: 7743477
    Abstract: 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: Grant
    Filed: August 4, 2008
    Date of Patent: June 29, 2010
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Yoshiaki Sakamoto, Shuji Koike, Tomohisa Shingai
  • Patent number: 7709804
    Abstract: 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: Grant
    Filed: July 21, 2008
    Date of Patent: May 4, 2010
    Assignee: FUJIFILM Corporation
    Inventors: Yoshiaki Sakamoto, Futoshi Yoshida, Takashi Shoji, Takeshi Asano
  • Publication number: 20100053038
    Abstract: 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: Application
    Filed: July 21, 2009
    Publication date: March 4, 2010
    Applicant: FUJIFILM CORPORATION
    Inventor: Yoshiaki SAKAMOTO
  • Publication number: 20100053043
    Abstract: 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: Application
    Filed: July 21, 2009
    Publication date: March 4, 2010
    Applicant: FUJIFILM CORPORATION
    Inventor: Yoshiaki SAKAMOTO
  • Patent number: 7611232
    Abstract: 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: Grant
    Filed: December 21, 2006
    Date of Patent: November 3, 2009
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Shuji Koike, Yoshiaki Sakamoto, Tomohisa Shingai
  • Patent number: 7607764
    Abstract: 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: Grant
    Filed: September 6, 2007
    Date of Patent: October 27, 2009
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Yoshiaki Sakamoto, Shuji Koike, Tomohisa Shingai
  • Patent number: 7562994
    Abstract: 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: Grant
    Filed: June 21, 2005
    Date of Patent: July 21, 2009
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Yoshiaki Sakamoto, Toshiro Takahashi, Masaya Nakayama
  • Patent number: 7531957
    Abstract: 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: Grant
    Filed: September 10, 2003
    Date of Patent: May 12, 2009
    Assignee: FUJIFILM Corporation
    Inventor: Yoshiaki Sakamoto
  • Patent number: 7517061
    Abstract: 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: Grant
    Filed: February 28, 2005
    Date of Patent: April 14, 2009
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Yoshiaki Sakamoto, Shuji Koike, Tomohisa Shingai
  • Publication number: 20090026382
    Abstract: 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: Application
    Filed: July 21, 2008
    Publication date: January 29, 2009
    Applicant: FUJIFILM CORPORATION
    Inventors: Yoshiaki Sakamoto, Futoshi Yoshida, Takashi Shoji, Takeshi Asano
  • Publication number: 20080295309
    Abstract: 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: Application
    Filed: August 4, 2008
    Publication date: December 4, 2008
    Applicant: FUJI PHOTO FILM CO., LTD.
    Inventors: Yoshiaki Sakamoto, Shuji Koike, Tomohisa Shingai
  • Patent number: 7425058
    Abstract: 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: Grant
    Filed: February 28, 2005
    Date of Patent: September 16, 2008
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Yoshiaki Sakamoto, Shuji Koike, Tomohisa Shingai
  • Patent number: 7368868
    Abstract: 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: Grant
    Filed: March 18, 2005
    Date of Patent: May 6, 2008
    Assignee: FUJIFILM Corporation
    Inventor: Yoshiaki Sakamoto