Patents by Inventor Ryoji Nomura

Ryoji Nomura 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).

  • Patent number: 8134148
    Abstract: A novel stilbene derivative is provided with motivation of providing a blue emissive material showing excellent color purity. The use of the stilbene derivative of the present invention allows the fabrication of a blue-emissive light-emitting element with excellent color purity. The invention also includes an electronic device equipped with a display portion in which the stilbene derivative is employed. The stilbene derivative of the present invention is represented by formula (1), in which Ar1 and Ar2 may form a 5-membered ring by being directly bonded to each other. In formula (1), A11 represents any one of substituents represented by general formulas (1-1) to (1-3). The variables shown in formula (1) and (1-1) to (1-3) are as defined in the specification.
    Type: Grant
    Filed: June 7, 2010
    Date of Patent: March 13, 2012
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Masakazu Egawa, Harue Osaka, Sachiko Kawakami, Nobuharu Ohsawa, Satoshi Seo, Ryoji Nomura
  • Patent number: 8128727
    Abstract: It is an object of the present invention to collect a scarce metal such as iridium from a light-emitting element which is no longer used. A method for collecting a metal is provided in which an organic metal compound which can emit visible light from a triplet excited state at room temperature is heated, or an EL layer of a light-emitting layer containing an organic metal compound which can emit visible light from a triplet excited state at room temperature is dissolved in a solvent to form a solution, and the solution is heated, irradiated with microwaves or treated with acid water. According to the above method, resources of metals such as iridium or platinum, which are scarce metals, can be utilized efficiently.
    Type: Grant
    Filed: November 13, 2007
    Date of Patent: March 6, 2012
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Ryoji Nomura, Satoshi Seo, Hideko Inoue, Kaoru Kato
  • Publication number: 20120051031
    Abstract: The present invention provides a laser oscillator using an electroluminescent material that can enhance directivity of emitted laser light and resistance to a physical impact. The laser oscillator has a first layer including a concave portion, a second layer formed over the first layer to cover the concave portion, and a light emitting element formed over the second layer to overlap the concave portion, wherein the second layer is planarized, an axis of laser light obtained from the light emitting element intersects with a planarized surface of the second layer, the first layer has a curved surface in the concave portion, and a refractive index of the first layer is lower than that of the second layer.
    Type: Application
    Filed: November 9, 2011
    Publication date: March 1, 2012
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Ryoji NOMURA, Akihisa SHIMOMURA
  • Patent number: 8110980
    Abstract: A novel anthracene derivative represented by General Formula (1) is provided, which enables the production of a light-emitting element with high luminous efficiency and a long lifetime. A high-performance light-emitting device and electronic device in which the anthracene derivative is employed are also disclosed. The anthracene derivative of the present invention is represented by General Formula (1), in which the unit A represents any one of substituents represented by General Formulae (1-1) to (1-3). The variables shown in Formulae (1) and (1-1) to (1-3) are defined in the specification.
    Type: Grant
    Filed: March 4, 2010
    Date of Patent: February 7, 2012
    Assignee: Semiconductor Energy laboratory Co., Ltd.
    Inventors: Masakazu Egawa, Sachiko Kawakami, Harue Osaka, Tsunenori Suzuki, Ryoji Nomura
  • Patent number: 8106392
    Abstract: An object is to provide a novel anthracene derivative. Another object is to provide a light-emitting element with high luminous efficiency. Yet another object is to provide a light-emitting element with a long lifetime. Still another object is to provide a light-emitting device and an electronic device having a long lifetime by using the light-emitting elements of the present invention. The anthracene derivative represented by General Formula (1) is provided. The ability of the anthracene derivative represented by General Formula (1) to exhibit high luminous efficiency allows the production of a light-emitting element with high luminous efficiency and a long lifetime.
    Type: Grant
    Filed: November 23, 2010
    Date of Patent: January 31, 2012
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Masakazu Egawa, Harue Nakashima, Sachiko Kawakami, Tsunenori Suzuki, Ryoji Nomura
  • Patent number: 8101759
    Abstract: It is an object to provide a new compound which is suitable for a material of an electron-transporting layer of a light-emitting element. In particular, it is an object to provide a compound which can be used for forming a light-emitting element capable of emitting light at a low drive voltage. An acenaphthopyridine derivative represented by the following general formula (G1) is provided. In the formula, Het represents a pyridyl group or a quinolyl group.
    Type: Grant
    Filed: March 24, 2009
    Date of Patent: January 24, 2012
    Assignee: Semiconductor Energy laboratory Co., Ltd.
    Inventors: Takako Takasu, Ryoji Nomura, Satoko Shitagaki, Satoshi Seo
  • Patent number: 8101943
    Abstract: It is an object of the present invention to provide a technique in which a high-performance and high reliable memory device and a semi-conductor device provided with the memory device are manufactured at low cost with high yield. The semiconductor device includes an organic compound layer including an insulator over a first conductive layer and a second conductive layer over the organic compound layer including an insulator. Further, the semiconductor device is manufactured by forming a first conductive layer, discharging a composition of an insulator and an organic compound over the first conductive layer to form an organic compound layer including an insulator, and forming a second conductive layer over the organic compound layer including an insulator.
    Type: Grant
    Filed: April 25, 2006
    Date of Patent: January 24, 2012
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Mikio Yukawa, Nobuharu Ohsawa, Ryoji Nomura, Yoshinobu Asami
  • Publication number: 20120007066
    Abstract: It is an object of the present invention to provide a novel material capable of realizing excellent color purity of blue, and a light emitting element and a light emitting device using the novel material. Further, it is an object of the present invention to provide which is highly reliable, and a light emitting element and a light emitting device using the novel material.
    Type: Application
    Filed: September 21, 2011
    Publication date: January 12, 2012
    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
    Inventors: Sachiko KAWAKAMI, Nobuharu OHSAWA, Harue NAKASHIMA, Kumi KOJIMA, Satoshi SEO, Masakazu EGAWA, Ryoji NOMURA
  • Patent number: 8089799
    Abstract: The present invention provides a semiconductor device including a memory that has a memory cell array including a plurality of memory cells, a control circuit that controls the memory, and an antenna, where the memory cell array has a plurality of bit lines extending in a first direction and a plurality of word lines extending in a second direction different from the first direction, and each of the plurality of memory cells has an organic compound layer provided between the bit line and the word line. Data is written by applying optical or electric action to the organic compound layer.
    Type: Grant
    Filed: January 7, 2009
    Date of Patent: January 3, 2012
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Ryoji Nomura, Hiroko Abe, Yuji Iwaki, Shunpei Yamazaki
  • Patent number: 8059692
    Abstract: The present invention provides a laser oscillator using an electroluminescent material that can enhance directivity of emitted laser light and resistance to a physical impact. The laser oscillator has a first layer including a concave portion, a second layer formed over the first layer to cover the concave portion, and a light emitting element formed over the second layer to overlap the concave portion, wherein the second layer is planarized, an axis of laser light obtained from the light emitting element intersects with a planarized surface of the second layer, the first layer has a curved surface in the concave portion, and a refractive index of the first layer is lower than that of the second layer.
    Type: Grant
    Filed: February 19, 2009
    Date of Patent: November 15, 2011
    Assignee: Semiconductor Energy Labortory Co., Ltd.
    Inventors: Ryoji Nomura, Akihisa Shimomura
  • Patent number: 8053980
    Abstract: The present invention provides a light-emitting device includes first, second and third light-emitting elements, emitting light having different color. The first light-emitting element includes a first anode; a first cathode; and first and second light-emitting layers therebetween, wherein the first light-emitting layer includes a first high light-emitting substance and a first organic compound, and the second light-emitting layer includes the first high light-emitting substance and a second organic compound. The second light-emitting element includes a second anode; a second cathode; and a third light-emitting layer and a layer for controlling carrier transfer therebetween, wherein the third light-emitting layer includes a second high light-emitting substance, wherein the layer for controlling carrier transfer includes third and fourth organic compounds.
    Type: Grant
    Filed: March 14, 2008
    Date of Patent: November 8, 2011
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Ryoji Nomura, Satoshi Seo, Nobuharu Ohsawa, Tsunenori Suzuki, Sachiko Kawakami, Harue Osaka, Hideko Inoue
  • Patent number: 8039122
    Abstract: It is an object of the present invention to provide a novel material capable of realizing excellent color purity of blue, and a light emitting element and a light emitting device using the novel material. Further, it is an object of the present invention to provide which is highly reliable, and a light emitting element and a light emitting device using the novel material.
    Type: Grant
    Filed: March 24, 2006
    Date of Patent: October 18, 2011
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Sachiko Kawakami, Nobuharu Ohsawa, Harue Nakashima, Kumi Kojima, Satoshi Seo, Masakazu Egawa, Ryoji Nomura
  • Publication number: 20110248254
    Abstract: It is an object to provide a novel bipolar organic compound. In particular, it is an object to provide a bipolar organic compound excellent in thermal stability. Further, it is another object to provide a bipolar organic compound which is electrochemically stable. A quinoxaline derivative represented by a general formula (1) is provided. Further, since the quinoxaline derivative represented by the general formula (1) is bipolar, the use of the quinoxaline derivative of the present invention allows fabrication of a light-emitting element and a light-emitting device with a low driving voltage and low power consumption. Furthermore, a light-emitting element with high luminous efficiency can be obtained.
    Type: Application
    Filed: June 20, 2011
    Publication date: October 13, 2011
    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
    Inventors: Masakazu EGAWA, Sachiko KAWAKAMI, Harue NAKASHIMA, Nobuharu OHSAWA, Satoshi SEO, Ryoji NOMURA
  • Patent number: 8030643
    Abstract: A semiconductor device that can transmit and receive data without contact is popular partly as some railway passes, electronic money cards, and the like; however, it has been a prime task to provide an inexpensive semiconductor device for further popularization. In view of the above current conditions, a semiconductor device of the present invention includes a memory with a simple structure for providing an inexpensive semiconductor device and a manufacturing method thereof. A memory element included in the memory includes a layer containing an organic compound, and a source electrode or a drain electrode of a TFT provided in the memory element portion is used as a conductive layer which forms a bit line of the memory element.
    Type: Grant
    Filed: March 27, 2006
    Date of Patent: October 4, 2011
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Yoshinobu Asami, Tamae Takano, Masayuki Sakakura, Ryoji Nomura, Shunpei Yamazaki
  • Publication number: 20110227137
    Abstract: The present invention provides a semiconductor device including a memory that has a memory cell array including a plurality of memory cells, a control circuit that controls the memory, and an antenna, where the memory cell array has a plurality of bit lines extending in a first direction and a plurality of word lines extending in a second direction different from the first direction, and each of the plurality of memory cells has an organic compound layer provided between the bit line and the word line. Data is written by applying optical or electric action to the organic compound layer.
    Type: Application
    Filed: June 2, 2011
    Publication date: September 22, 2011
    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
    Inventors: Ryoji NOMURA, Hiroko ABE, Yuji IWAKI, Shunpei YAMAZAKI
  • Patent number: 8018152
    Abstract: When a light-emitting element having an intermediate conductive layer between a plurality of light-emitting layers is formed, the intermediate conductive layer can have transparency; and thus, materials are largely limited and the manufacturing process of an element becomes complicated by a conventional method. A light-emitting element according to the present invention is formed by sequentially stacking a pixel electrode, a first light-emitting layer, an intermediate conductive layer (including an electron injecting layer and a hole-injecting layer, one of which is island-like), a second light-emitting layer and an opposite electrode.
    Type: Grant
    Filed: May 17, 2005
    Date of Patent: September 13, 2011
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Shunpei Yamazaki, Ryoji Nomura, Satoshi Seo, Hiroko Abe, Yasuo Nakamura
  • Patent number: 8008489
    Abstract: It is an object to provide a novel bipolar organic compound. In particular, it is an object to provide a bipolar organic compound excellent in thermal stability. Further, it is another object to provide a bipolar organic compound which is electrochemically stable. A quinoxaline derivative represented by a general formula (1) is provided. Further, since the quinoxaline derivative represented by the general formula (1) is bipolar, the use of the quinoxaline derivative of the present invention allows fabrication of a light-emitting element and a light-emitting device with a low driving voltage and low power consumption. Furthermore, a light-emitting element with high luminous efficiency can be obtained.
    Type: Grant
    Filed: February 4, 2010
    Date of Patent: August 30, 2011
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Masakazu Egawa, Sachiko Kawakami, Harue Nakashima, Nobuharu Ohsawa, Satoshi Seo, Ryoji Nomura
  • Publication number: 20110198585
    Abstract: It is an object of the present invention to provide a light emitting element with a low driving voltage. In a light emitting element, a first electrode; and a first composite layer, a second composite layer, a light emitting layer, an electron transporting layer, an electron injecting layer, and a second electrode, which are stacked over the first electrode, are included. The first composite layer and the second composite layer each include metal oxide and an organic compound. A concentration of metal oxide in the first composite layer is higher than a concentration of metal oxide in the second composite layer, whereby a light emitting element with a low driving voltage can be obtained. Further, the composite layer is not limited to a two-layer structure. A multi-layer structure can be employed. However, a concentration of metal oxide in the composite layer is gradually higher from the light emitting layer to first electrode side.
    Type: Application
    Filed: April 28, 2011
    Publication date: August 18, 2011
    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
    Inventors: Shunpei YAMAZAKI, Junichiro SAKATA, Ryoji NOMURA
  • Patent number: 7999463
    Abstract: It is an object of the present invention to provide a light emitting device which is less affected by a malfunction caused in a light emitting element. It is another object of the invention to provide a light emitting device in which light emitting elements are connected in series. As to a light emitting device of the invention, groups of circuits each having a light emitting element and a limiter are connected in parallel. Here, a light emitting element and a limiter are connected in series. The number of the circuits may be at least two or more. Further, each circuit group includes at least one light emitting element.
    Type: Grant
    Filed: September 5, 2005
    Date of Patent: August 16, 2011
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventor: Ryoji Nomura
  • Publication number: 20110186825
    Abstract: A quinoxaline derivative expressed by the general formula (1) is provided. (Each of R1 to R12 represents one of a hydrogen atom, a halogen atom, an alkyl group, an alkoxyl group, an acyl group, a dialkyl amino group, a diarylamino group, a substituted or unsubstituted vinyl group, a substituted or unsubstituted aryl group, and a substituted or unsubstituted heterocycle group. Ar1 represents one of a substituted or unsubstituted biphenyl group and a substituted or unsubstituted terphenyl group, and Ar2 represents one of a substituted or unsubstituted phenyl group, a substituted or unsubstituted biphenyl group, a substituted or unsubstituted terphenyl group, and a substituted or unsubstituted monocyclic heterocycle group.
    Type: Application
    Filed: March 7, 2011
    Publication date: August 4, 2011
    Inventors: Masakazu Egawa, Sachiko Kawakami, Nobuharu Ohsawa, Hideko Inoue, Satoshi Seo, Ryoji Nomura