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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Publication number: 20070159583Abstract: A liquid crystal electro-optical device comprising a pair of substrates at least one of them is light-transmitting, electrodes being provided on said substrates, and an electro-optical modulating layer being supported by said pair of substrates, provided that said electro-optical modulating layer comprises an anti-ferroelectric liquid crystal material or a smectic liquid crystal material which exhibits anti-ferroelectricity, and a transparent material.Type: ApplicationFiled: October 4, 2006Publication date: July 12, 2007Applicant: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shunpei Yamazaki, Takeshi Nishi, Toshimitsu Konuma, Michio Shimizu, Kouji Moriya
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Publication number: 20070159044Abstract: A display device having an electroluminescence element with an improved contrast ratio is provided. Stacked polarizing plates are provided on the outer side of substrates of a display device which includes a first light-transmitting substrate and a second light-transmitting substrate arranged to face each other and an electroluminescence element interposed therebetween that emits light to both the first light-transmitting substrate side and the second light-transmitting substrate side. The polarizing plates facing each other are arranged in a crossed nicol state. Furthermore, among a plurality of polarizing plates arranged to face each other, a plurality of polarizing plates which are stacked on one side or the other side of the light-transmitting substrates are arranged in a parallel nicol state. As a result, a display device with a high contrast ratio can be provided.Type: ApplicationFiled: December 19, 2006Publication date: July 12, 2007Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.Inventors: Tetsuji ISHITANI, Yuji EGI, Takeshi NISHI
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Publication number: 20070146579Abstract: A display device with a higher contrast ratio is provided. The display device is provided with stacked polarizing plates arranged displaced from a parallel nicol state. Moreover, in the display device, at least one of a pair of stacked polarizing plates is displaced from a parallel state. The pair of stacked polarizing plates is arranged in a cross nicol state. A retardation plate may be provided between the polarizing plate and the substrate. As a result, the contrast ratio can be increased.Type: ApplicationFiled: December 20, 2006Publication date: June 28, 2007Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.Inventors: Yuji EGI, Tetsuji ISHITANI, Takeshi NISHI
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Publication number: 20070146580Abstract: An object of the invention is to provide a display device having a high contrast ratio by a simple and easy method. Another object of the invention is to manufacture such a high-performance display device at low cost. In a display device having a display element between a pair of light-transmissive substrates, polarizing plates each having an extinction coefficient of an absorption axis which is different from that of an absorption axis of another polarizing plate are stacked to be provided. At that time, the stacked polarizing plates are arranged so as to be in a parallel nicol state. A wave plate and a retardation film may be provided between the stacked polarizing plates and the substrates.Type: ApplicationFiled: December 20, 2006Publication date: June 28, 2007Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.Inventors: Tetsuji Ishitani, Yuji EGI, Takeshi Nishi
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Publication number: 20070126962Abstract: A problem exists in that black luminance in a liquid crystal display device when seen in a dark place is high compared to black luminance of a light emitting element in a non-light-emitting state, so as a result, contrast ratio is low. There is a high demand for contrast ratio to be improved. Therefore, it is an object of the present invention to provide a liquid crystal display device with improved contrast ratio and a wide viewing angle. Retardation films and stacked polarizing plates are provided over light transmitting substrates which sandwich a display element. A film having liquid crystal with hybrid oriented liquid crystal, a film having liquid crystal with twisted orientation, uniaxial retardation films, or biaxially retardation films can be used as the retardation films. It is preferable that the stacked polarizing plates comprise two polarizing plates.Type: ApplicationFiled: December 1, 2006Publication date: June 7, 2007Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.Inventors: Yuji Egi, Tetsuji Ishitani, Takeshi Nishi
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Patent number: 7227603Abstract: 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: April 14, 1998Date of Patent: June 5, 2007Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Toshimitsu Konuma, Takeshi Nishi, Michio Shimizu, Harumi Mori, Kouji Moriya, Satoshi Murakami
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Publication number: 20070121033Abstract: The invention provides a display device of which a contrast ratio is enhanced. By providing stacked polarizing plates so as to be in a cross nicol state, a contrast ratio of a display device can be enhanced. The stacked polarizing plates are stacked outside a light-transmissive insulating substrate in a parallel nicol state. When the number of polarizing plates is four or five in total, a contrast ratio becomes the highest.Type: ApplicationFiled: October 27, 2006Publication date: May 31, 2007Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.Inventors: Tetsuji ISHITANI, Yuji EGI, Takeshi NISHI, Koji MORIYA
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Publication number: 20070120475Abstract: It is an object to provide a display device having an electroluminescent element in which a contrast ratio is increased. In a display device having an electroluminescent element between a pair of light transmitting substrates, a circularly polarizing plate having stacked polarizing plates arranged on outer sides thereof is provided. At this time, opposed polarizing plates are arranged to be in a crossed nicol state or in a parallel nicol state. As a result, a display device with a high contrast ratio can be provided.Type: ApplicationFiled: November 27, 2006Publication date: May 31, 2007Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.Inventors: Tetsuji ISHITANI, Yuji EGI, Takeshi NISHI
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Publication number: 20070116901Abstract: An object is to uniformly align liquid crystal molecules without requiring a step of forming an alignment film. A material for forming a self-assembled monolayer is dispersed in a liquid crystal material, and the mixture is interposed between a pair of substrates by a liquid crystal injection method or a liquid crystal dropping method. A silane coupling agent (the material for forming a self-assembled monolayer) injected or dropped with the liquid crystal material adsorbs to a substrate interface (or a surface of an electrode formed over a substrate) after the injection or dropping, thereby forming a self-assembled monolayer. This self-assembled monolayer serves as an alignment film, and enables long axes of liquid crystal molecules to be approximately perpendicular to a substrate and the liquid crystal molecules to be uniformly aligned.Type: ApplicationFiled: November 22, 2006Publication date: May 24, 2007Applicant: Semiconductor Energy Laboratory Co., Ltd.Inventors: Daisuke Kubota, Takeshi Nishi, Akio Yamashita
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Patent number: 7199519Abstract: 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: GrantFiled: March 31, 2006Date of Patent: April 3, 2007Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shunpei Yamazaki, Takeshi Nishi, Mayumi Mizukami, Hisao Ikeda
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Publication number: 20070064176Abstract: It is an object of the present invention to suppress light leakage in a dark state which is generated by rubbing treatment. A liquid crystal material containing an ultraviolet curable liquid crystalline monomer at a concentration of more than 0 wt % and not more than 1.0 wt % is used for a liquid crystal layer, and the liquid crystal layer is irradiated with ultraviolet rays. By applying such a liquid crystal layer to a liquid crystal display device, light leakage in a dark state can be suppressed, and the black display can be improved. Therefore, a liquid crystal display device with an excellent contrast and high display quality can be obtained.Type: ApplicationFiled: September 14, 2006Publication date: March 22, 2007Applicant: Semiconductor Energy Laboratory Co., Ltd.Inventors: Daisuke Kubota, Takeshi Nishi, Tetsuji Ishitani
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Publication number: 20070063196Abstract: By doping an organic compound functioning as an electron donor (hereinafter referred to as donor molecules) into an organic compound layer contacting a cathode, donor levels can be formed between respective LUMO (lowest unoccupied molecular orbital) levels between the cathode and the organic compound layer, and therefore electrons can be injected from the cathode, and transmission of the injected electrons can be performed with good efficiency. Further, there are no problems such as excessive energy loss, deterioration of the organic compound layer itself, and the like accompanying electron movement, and therefore an increase in the electron injecting characteristics and a decrease in the driver voltage can both be achieved without depending on the work function of the cathode material.Type: ApplicationFiled: November 15, 2006Publication date: March 22, 2007Inventors: Takeshi Nishi, Satoshi Seo
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Publication number: 20070021549Abstract: 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: ApplicationFiled: May 25, 2004Publication date: January 25, 2007Inventors: Akira Kojima, Takeshi Nishi, Hisaya Iwamura
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Publication number: 20070018566Abstract: Technology to reduce the manufacturing cost of a manufacturing process of a light emitting device is provided. The manufacturing cost of a device using a light emitting element can be reduced by using a multilayout process for forming a plurality of light emitting devices from a large-sized substrate. In particular, a remarkable feature of the present invention resides in a point that an existing line for manufacturing liquid crystal cells can be diverted to a process of encapsulating light emitting elements according to the present invention, which can greatly reduce the manufacturing cost including the investment in plant and equipment.Type: ApplicationFiled: September 25, 2006Publication date: January 25, 2007Inventors: Shunpei Yamazaki, Toshimitsu Konuma, Takeshi Nishi
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Publication number: 20060286889Abstract: An EL display device capable of reducing an average film resistance of an anode in an EL device as well as displaying an image with high definition, and electrical equipment including such an EL display device are provided. A light-shielding metal film 109 is provided on an anode 108 so as to conceal gaps between the pixels. Thus, an average film resistance of the anode 108 in the EL device is reduced. Furthermore, light leakage from the gaps between the pixels can be prevented, resulting in an image display with high definition.Type: ApplicationFiled: August 24, 2006Publication date: December 21, 2006Inventors: Takeshi Nishi, Noriko Ishimaru
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Publication number: 20060279685Abstract: A brighter active matrix type liquid crystal electro-optical device with a higher contrast, yet having a wider visual angle is realized, said liquid crystal electro-optical device comprises a liquid crystal layer and means for applying an electric field to the liquid crystal layer in the direction parallel to the substrate, wherein the liquid crystal layer comprises a liquid crystal material dispersed in a polymer material. Also a liquid crystal electro-optical device comprising a liquid crystal layer disposed on a substrate is included, wherein the transmission mode or the dispersion mode of an incident light is selected by an electric field applied to the liquid crystal layer in the direction parallel to the liquid crystal layer.Type: ApplicationFiled: August 18, 2006Publication date: December 14, 2006Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.Inventors: Yoshiharu Hirakata, Takeshi Nishi, Rumo Satake
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Patent number: 7141817Abstract: By doping an organic compound functioning as an electron donor (hereinafter referred to as donor molecules) into an organic compound layer contacting a cathode, donor levels can be formed between respective LUMO (lowest unoccupied molecular orbital) levels between the cathode and the organic compound layer, and therefore electrons can be injected from the cathode, and transmission of the injected electrons can be performed with good efficiency. Further, there are no problems such as excessive energy loss, deterioration of the organic compound layer itself, and the like accompanying electron movement, and therefore an increase in the electron injecting characteristics and a decrease in the driver voltage can both be achieved without depending on the work function of the cathode material.Type: GrantFiled: November 26, 2002Date of Patent: November 28, 2006Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Takeshi Nishi, Satoshi Seo
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Patent number: 7136128Abstract: A brighter active matrix type liquid crystal electro-optical device with a higher contrast, yet having a wider visual angle is realized, said liquid crystal electro-optical device comprises a liquid crystal layer and means for applying an electric field to the liquid crystal layer in the direction parallel to the substrate, wherein the liquid crystal layer comprises a liquid crystal material dispersed in a polymer material. Also a liquid crystal electro-optical device comprising a liquid crystal layer disposed on a substrate is included, wherein the transmission mode or the dispersion mode of an incident light is selected by an electric field applied to the liquid crystal layer in the direction parallel to the liquid crystal layer.Type: GrantFiled: July 23, 2002Date of Patent: November 14, 2006Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Yoshiharu Hirakata, Takeshi Nishi, Rumo Satake
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Patent number: 7123320Abstract: A liquid crystal electro-optical device comprising a pair of substrates at least one of them is light-transmitting, electrodes being provided on said substrates, and an electro-optical modulating layer being supported by said pair of substrates, provided that said electro-optical modulating layer comprises an anti-ferroelectric liquid crystal material or a smectic liquid crystal material which exhibits anti-ferroelectricity, and a transparent material.Type: GrantFiled: August 22, 2003Date of Patent: October 17, 2006Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shunpei Yamazaki, Takeshi Nishi, Toshimitsu Konuma, Michio Shimizu, Kouji Moriya
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Patent number: 7112115Abstract: Technology to reduce the manufacturing cost of a manufacturing process of a light emitting device is provided. The manufacturing cost of a device using a light emitting element can be reduced by using a multilayout process for forming a plurality of light emitting devices from a large-sized substrate. In particular, an existing line for manufacturing liquid crystal cells can be diverted to a process of encapsulating light emitting elements, which can greatly reduce the manufacturing cost including the investment in plant and equipment.Type: GrantFiled: November 7, 2000Date of Patent: September 26, 2006Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shunpei Yamazaki, Toshimitsu Konuma, Takeshi Nishi
