Patents by Inventor Takeshi Nishi
Takeshi Nishi 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: 7592984Abstract: A display device capable of displaying on both screens and switching between vertical and horizontal display, and a driving method thereof. Each pixel comprises a first region including a first light emitting element, and a second region including a second light emitting element. The first region has a bottom emission structure whereas the second region has a top emission structure. The display device comprises a source signal line driver circuit for driving the pixel, a first gate signal line driver circuit having a scan direction perpendicular to that of the source signal line driver circuit, and a second gate signal line driver circuit having a scan direction perpendicular to that of the first gate signal line driver circuit. In a normal display, the first gate signal line driver circuit performs perpendicular scanning, and when switching between vertical and horizontal display, the second gate signal line driver circuit performs perpendicular scanning.Type: GrantFiled: November 16, 2007Date of Patent: September 22, 2009Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Jun Koyama, Yu Yamazaki, Yoshifumi Tanada, Satoshi Seo, Takeshi Nishi, Yasuo Nakamura, Shunpei Yamazaki
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Publication number: 20090218939Abstract: In a sealing method of a top-emission organic light emitting element, in the case of using a method of filling with a sealing agent between a substrate mounted with pixels and an opposed substrate, the organic light-emitting element is degraded by ultraviolet rays when irradiation of the ultraviolet rays is performed toward the pixels in order to achieve ultraviolet curing of the sealing agent filling on the pixels. It is an object of the present invention to propose a method for avoiding this phenomenon to provide an organic light-emitting device with superior stability. In order for a sealing agent 13 filling on a pixel portion 14 to have a larger absorbance to ultraviolet rays, an ultraviolet-absorbent material is dispersed in a sealing agent to make an adjustment so that the absorbance of ultraviolet absorption wavelength of 400 nm or less becomes 1 or more.Type: ApplicationFiled: May 5, 2009Publication date: September 3, 2009Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.Inventors: Satoko Shitagaki, Satoshi Seo, Takeshi Nishi
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Publication number: 20090201450Abstract: To improve the response speed of liquid crystal molecules when a liquid crystal display device is changed from an on state to an off state. A liquid crystal display device that includes a liquid crystal material between a substrate and a counter substrate; a plurality of pixels over the substrate; and a microstructure which is provided over the substrate, is in contact with the liquid crystal material, and includes a movable portion and a method for manufacturing the liquid crystal display device are provided. The microstructure may include a lower electrode, an upper electrode, and a space between the lower electrode and the upper electrode. The microstructure is manufactured through the steps of forming the lower electrode over the substrate, forming a sacrificial layer over the lower electrode, forming the upper electrode over the sacrificial layer, and removing the sacrificial layer by etching to form the space.Type: ApplicationFiled: February 3, 2009Publication date: August 13, 2009Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.Inventors: Kaoru Hatano, Takeshi NISHI, Shuji FUKAI
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Patent number: 7569635Abstract: A polyphenylene sulfide resin composition which comprises 100 parts by weight of a polyphenylene sulfide resin (A) and, compounded therewith, 1 to 100 parts by weight of glass fibers (B) having a single-fiber diameter of 12 ?m or lager and has a crystallization temperature during cooling of 205° C. or lower. Also provided is a polyphenylene sulfide resin composition which comprises 100 parts by weight of a polyphenylene sulfide resin (A) and, compounded therewith, 1 to 100 parts by weight of glass fibers (B) having a single-fiber diameter of 10 to 12 ?m, excluding 12 ?m, has a crystallization temperature during cooling of 205° C. or lower and a chloroform-extractable content of 0.5 wt. % or lower, and gives a 2 mm-thick molded product which has a transmittance of 15% or higher for laser beam having a wavelength of 940 nm and a heat distortion temperature of 230° C. or higher under a load of 1.82 MPa.Type: GrantFiled: May 25, 2004Date of Patent: August 4, 2009Assignee: Toray Industries, Inc.Inventors: Akira Kojima, Takeshi Nishi, Hisaya Iwamura
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Patent number: 7563490Abstract: In the present invention, it is an object to improve display quality by improving response speed of a liquid crystal element in a liquid crystal display device, in particular, response speed in the case of falling. In the present invention, it is characterized that a liquid crystal layer is divided into plural regions (domains) substantially by mixing a compound including a liquid crystal skeleton in a liquid crystal layer exisiting liquid crystal molecules as a technique to improve response speed of a liquid crystal element in a liquid crystal display device for solving the above problem.Type: GrantFiled: November 29, 2005Date of Patent: July 21, 2009Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Takeshi Nishi, Tetsuji Ishitani, Daisuke Kubota
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Patent number: 7561246Abstract: A liquid crystal device comprising: a pair of substrates having an electrode arrangement thereon; an orientation control means provided on at least one of said substrates; and a ferroelectric or antiferroelectric liquid crystal layer interposed between said substrates, said liquid crystal layer being uniaxially oriented by virtue of said orientation control means, wherein means for suppressing an orientation control effect of said orientation control means with respect to said liquid crystal layer is provided between said liquid crystal layer and said orientation control means.Type: GrantFiled: June 4, 2007Date of Patent: July 14, 2009Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Toshimitsu Konuma, Takeshi Nishi, Michio Shimizu, Harumi Mori, Kouji Moriya, Satoshi Murakami
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Patent number: 7557873Abstract: A display device is disclosed. The display device has a first substrate having a thin film transistor connected to a pixel electrode. Further, the display device has a second substrate opposed to the first substrate and having a resin black matrix.Type: GrantFiled: April 28, 2005Date of Patent: July 7, 2009Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shunpei Yamazaki, Takeshi Nishi
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Publication number: 20090140283Abstract: An object of the present invention is to provide a light emitting device in which variations in an emission spectrum depending on a viewing angle with respect to a side from which luminescence is extracted are decreased. A light emitting device according to the invention has a transistor, an insulating layer covering the transistor and a light emitting element provided in an opening of the insulating layer. The transistor and the light emitting element are electronically connected through a connecting portion. Additionally, the connecting portion is connected to the transistor through a contact hole penetrating the insulating layer. Note that the insulating layer may be a single layer or a multilayer in which a plurality of layers including different substances is laminated.Type: ApplicationFiled: February 2, 2009Publication date: June 4, 2009Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.Inventors: Takahiro KAWAKAMI, Kaoru TSUCHIYA, Takeshi NISHI
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Patent number: 7535440Abstract: A light emitting element, in which voltages having different polarities are applied alternately in order to prevent the accumulation of electric charge in an organic compound layer of the light emitting element, and in which light is always emitted, no matter whether a positive polarity voltage or a negative polarity voltage is applied, is provided. An opposing electrode is formed between a first electrode and a second electrode, and a first light emitting element having a compound layer that contains a first organic substance between the first electrode and the opposing electrode, and a second light emitting element having a compound layer that contains a second organic substance between the opposing electrode and the second electrode, are formed in the present invention.Type: GrantFiled: April 4, 2003Date of Patent: May 19, 2009Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Takeshi Nishi, Noriko Shibata
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Publication number: 20090121987Abstract: A liquid crystal display device is provided, which includes a liquid crystal element including a pixel electrode, a counter electrode, and a liquid crystal disposed between the pixel electrode and the counter electrode, a light source, a comparing circuit configured to compare a potential of the pixel electrode and a reference potential, and supply an output potential in accordance with the result of the comparison, and a control circuit configured to switch turning-on and turning-off of the light source in accordance with the output potential supplied from the comparing circuit.Type: ApplicationFiled: November 12, 2008Publication date: May 14, 2009Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.Inventors: Takahiro FUKUTOME, Takeshi NISHI
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Patent number: 7531847Abstract: In a sealing method of a top-emission organic light emitting element, in the case of using a method of filling with a sealing agent between a substrate mounted with pixels and an opposed substrate, the organic light-emitting element is degraded by ultraviolet rays when irradiation of the ultraviolet rays is performed toward the pixels in order to achieve ultraviolet curing of the sealing agent filling on the pixels. It is an object of the present invention to propose a method for avoiding this phenomenon to provide an organic light-emitting device with superior stability. In order for a sealing agent 13 filling on a pixel portion 14 to have a larger absorbance to ultraviolet rays, an ultraviolet-absorbent material is dispersed in a sealing agent to make an adjustment so that the absorbance of ultraviolet absorption wavelength of 400 nm or less becomes 1 or more.Type: GrantFiled: December 22, 2003Date of Patent: May 12, 2009Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Satoko Shitagaki, Satoshi Seo, Takeshi Nishi
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Publication number: 20090115348Abstract: The luminance of different colors of light emitted from EL elements in a pixel portion of a light emitting device is equalized and the luminance of light emitted from the EL elements is raised. The pixel portion of the light emitting device has EL elements whose EL layers contain triplet compounds and EL elements whose EL layers contain singlet compounds in combination. The luminance of light emitted from the plural EL elements is thus equalized. Furthermore, a hole transporting layer has a laminate structure to thereby cause the EL elements to emit light of higher luminance.Type: ApplicationFiled: April 11, 2008Publication date: May 7, 2009Applicant: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shunpei Yamazaki, Takeshi Nishi, Mayumi Mizukami, Hisao Ikeda
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Publication number: 20090109388Abstract: To control the positioning of a spacer more accurately in a liquid crystal display device to prevent display defects due to incorrect positioning in a display region. To provide a liquid crystal display device with higher image quality and reliability, and to provide a method for manufacturing the liquid crystal display device with high yield. In a liquid crystal display device, a region onto which a spherical spacer is discharged is subjected to liquid-repellent treatment in order to reduce the wettability with respect to a liquid in which the spherical spacer is dispersed. The liquid (the droplet) does not spread over the liquid-repellent region and is dried while moving the spherical spacer toward the center of the liquid. Thus, incorrect positioning shortly after discharging, which has been caused by the loss of control in the liquid, can be corrected by moving the spherical spacer while drying the liquid.Type: ApplicationFiled: October 27, 2008Publication date: April 30, 2009Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.Inventors: Erika TAKAHASHI, Gen Fujii, Shuji Fukai, Takeshi Nishi
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Patent number: 7511776Abstract: An electric field that is parallel with a TFT substrate is formed by a pair of electrodes formed on the TFT substrate. Liquid crystal molecules in a light modulating layer are caused to respond electro-optically to the electric field. The light modulating layer is constituted of a liquid crystal material, an optically active substance, and a dichroic dye. The spiral pitch p [?m] of the light modulating layer, the cell thickness d [?m], the twist angle n of liquid crystal molecules, and the interelectrode interval L [?m] are set in ranges of 1?p?15, 1?d?10, n?300°, and L<25.Type: GrantFiled: December 16, 2003Date of Patent: March 31, 2009Inventors: Takeshi Nishi, Rumo Satake, Yoshiharu Hirakata
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Patent number: 7505091Abstract: In a liquid crystal display device which performs image display by controlling a liquid crystal layer by a lateral electric field that is parallel with a substrate, the lateral electric field is formed by a black matrix and a pixel electrode. That is, a common electrode and a black matrix are commonized which are separately provided conventionally. Further, a storage capacitor is formed in an area where the black matrix and a pixel line coextend with a third interlayer insulating film interposed in between. Since the storage capacitor is formed by using all the area where a thin-film transistor is covered with the black matrix, sufficient capacitance can be secured even if the widths of electrodes and wiring lines are reduced in the future.Type: GrantFiled: December 12, 2007Date of Patent: March 17, 2009Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Yoshiharu Hirakata, Takeshi Nishi, Shunpei Yamazaki, Takeshi Fukunaga
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Patent number: 7499139Abstract: There is disclosed a lightweight and small liquid crystal display which achieves low power consumption and in which the optical anisotropy of the liquid crystal material is compensated for in order to enhance the viewing angle characteristics and the response speed of the liquid crystal material. Display electrodes and a common electrode are formed on one of the substrates. The orientation of the liquid crystal material is of the HAN (hybrid alignment nematic) type. This compensates for the optical anisotropy of the liquid crystal material and improves the response speed.Type: GrantFiled: September 6, 2005Date of Patent: March 3, 2009Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shunpei Yamazaki, Takeshi Nishi
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Patent number: 7495257Abstract: An object of the present invention is to provide a light emitting device in which variations in an emission spectrum depending on a viewing angle with respect to a side from which luminescence is extracted are decreased. A light emitting device according to the invention has a transistor, an insulating layer covering the transistor and a light emitting element provided in an opening of the insulating layer. The transistor and the light emitting element are electronically connected through a connecting portion. Additionally, the connecting portion is connected to the transistor through a contact hole penetrating the insulating layer. Note that the insulating layer may be a single layer or a multilayer in which a plurality of layers including different substances is laminated.Type: GrantFiled: December 21, 2004Date of Patent: February 24, 2009Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Takahiro Kawakami, Kaoru Tsuchiya, Takeshi Nishi
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Patent number: 7481889Abstract: To provide a film forming apparatus in which an impurity contained in an organic compound is separated to be removed and a film is formed without decreasing the purity of the purified organic compound, whereby a high-purity organic compound is formed. A film forming apparatus of the present invention includes a purifying chamber for purifying an organic compound and a film forming chamber for vapor-depositing the purified organic compound onto a substrate. The organic compound purified by a zone melting method in the purifying chamber can be vapor-deposited onto the substrate provided in the film forming chamber without decreasing the purity thereof, so that a high-purity organic compound layer can be formed.Type: GrantFiled: July 8, 2005Date of Patent: January 27, 2009Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shunpei Yamazaki, Takeshi Nishi
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Patent number: 7482631Abstract: There is provided a film formation apparatus which is capable of forming an EL layer using an EL material with high purity. The EL material is purified by sublimation immediately before film formation in the film formation apparatus, to thereby remove oxygen, water, and another impurity, which are included in the EL material. Also, when film formation is performed using the EL material (high purity EL material) obtained by purifying with sublimation as an evaporation source, a high purity EL layer can be formed.Type: GrantFiled: May 27, 2004Date of Patent: January 27, 2009Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shunpei Yamazaki, Toshimitsu Konuma, Takeshi Nishi
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Publication number: 20090002619Abstract: A liquid crystal dripping method has a problem in that an uncured sealant increases in width at the time of attaching a pair of substrates and thus a liquid crystal material enters the sealant and unevenness occurs in the inner periphery of the sealant. A region in which reduced is the speed of diffusion of liquid crystal at the time of attaching a pair of substrates is provided between a sealant and an orientation film. Further, time for diffusing the liquid crystal and coming in contact with the sealant is made long. Accordingly, the sealant is subjected to photo-curing before the liquid crystal comes in contact with the sealant. The region in which reduced is the speed of diffusion of the liquid crystal is formed using a material for forming a vertical orientation film, a silane coupling agent, a substance having a photocatalytic function, or the like.Type: ApplicationFiled: June 20, 2008Publication date: January 1, 2009Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.Inventors: Masahide KANAI, Takeshi NISHI, Daisuke KUBOTA, Tetsuji ISHITANI