Patents by Inventor Mayumi Mizukami
Mayumi Mizukami 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: 20060267483Abstract: To provide a method of improving an efficiency for extracting light in a self light-emitting device using an organic EL material. In the self light-emitting device having a structure in which an EL layer (102) is sandwiched between a transparent electrode (103) and a cathode (101), a film thickness of the EL layer (102) and a film thickness of the transparent electrode (102) are equivalent to the film thicknesses in which there is no occurrence of a guided light, and an inert gas is filled in a space between the transparent electrode (103) and a cover material (105).Type: ApplicationFiled: August 9, 2006Publication date: November 30, 2006Inventors: Tetsuo Tsutsui, Toshimitsu Konuma, Mayumi Mizukami
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Patent number: 7112374Abstract: By repeating a purification process of a light-emitting organic compound several times, a thin film made of the light-emitting organic compound to be used in an EL display device contains ionic impurities at the concentration of 0.1 ppm or lower and has a volume resistivity in the range of 3×1010 ?cm or larger. By using such a thin film as a light-emitting layer in the EL device, a current caused by reasons other than the carrier recombination can be prevented from flowing through the thin film, and deterioration caused by unnecessary heat generation can be suppressed. Accordingly, it is possible to obtain an EL display device with high reliability.Type: GrantFiled: October 15, 2003Date of Patent: September 26, 2006Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shunpei Yamazaki, Toshimitsu Konuma, Mayumi Mizukami
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Publication number: 20060181206Abstract: 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: March 31, 2006Publication date: August 17, 2006Applicant: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shunpei Yamazaki, Takeshi Nishi, Mayumi Mizukami, Hisao Ikeda
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Patent number: 7045438Abstract: A semiconductor device in which degradation due to permeation of water and oxygen can be limited, e.g., a light emitting device having an organic light emitting device (OLED) formed on a plastic substrate, and a liquid crystal display using a plastic substrate. A layer to be debonded, containing elements, is formed on a substrate, bonded to a supporting member, and debonded from the substrate. A thin film is thereafter formed on the debonded layer. The debonded layer with the thin film is adhered to a transfer member. Cracks caused in the debonded layer at the time of debonding are thereby repaired. As the thin film in contact with the debonded layer, a film having thermal conductivity, e.g., film of aluminum nitride or aluminum nitroxide is used. This film dissipates heat from the elements and has the effect of preventing deformation and change in quality of the transfer member, e.g., a plastic substrate.Type: GrantFiled: July 22, 2002Date of Patent: May 16, 2006Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shunpei Yamazaki, Toru Takayama, Junya Maruyama, Mayumi Mizukami
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Patent number: 7042151Abstract: 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: January 31, 2005Date of Patent: May 9, 2006Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shunpei Yamazaki, Takeshi Nishi, Mayumi Mizukami, Hisao Ikeda
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Publication number: 20060077651Abstract: A cover member is adhered onto a substrate on which an EL element is formed with a filler as an adhesive. Further, a sealing member is provided so as to cover a side surface (an exposing surface) of the filler, and a frame member is adhered using the sealing member. With this structure, the EL element is completely sealed by the filler, and shut from moisture and the like from the outside. Thus, deterioration of an EL layer due to oxidization can be prevented.Type: ApplicationFiled: November 14, 2005Publication date: April 13, 2006Applicant: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shunpei Yamazaki, Yasuyuki Arai, Mayumi Mizukami
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Publication number: 20060046358Abstract: An object of the invention is to reduce the manufacturing cost of EL display devices and electronic devices incorporating the EL display devices. An EL material is formed by printing in an active matrix EL display device. Relief printing or screen printing may be used as the method of printing. Manufacturing steps of the EL layer is therefore simplified and reduction of manufacturing cost is devised.Type: ApplicationFiled: August 12, 2005Publication date: March 2, 2006Applicant: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shunpei Yamazaki, Mayumi Mizukami, Toshimitsu Konuma
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Publication number: 20060027817Abstract: A semiconductor device in which degradation due to permeation of water and oxygen can be limited, e.g., a light emitting device having an organic light emitting device (OLED) formed on a plastic substrate, and a liquid crystal display using a plastic substrate. A layer to be debonded, containing elements, is formed on a substrate, bonded to a supporting member, and debonded from the substrate. A thin film is thereafter formed on the debonded layer. The debonded layer with the thin film is adhered to a transfer member. Cracks caused in the debonded layer at the time of debonding are thereby repaired. As the thin film in contact with the debonded layer, a film having thermal conductivity, e.g., film of aluminum nitride or aluminum nitroxide is used. This film dissipates heat from the elements and has the effect of preventing deformation and change in quality of the transfer member, e.g., a plastic substrate.Type: ApplicationFiled: August 11, 2005Publication date: February 9, 2006Inventors: Shunpei Yamazaki, Toru Takayama, Junya Maruyama, Mayumi Mizukami
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Patent number: 6965195Abstract: A cover member is adhered onto a substrate on which an EL element is formed with a filler as an adhesive. Further, a sealing member is provided so as to cover a side surface (an exposing surface) of the filler, and a frame member is adhered using the sealing member. With this structure, the EL element is completely sealed by the filler, and shut from moisture and the like from the outside. Thus, deterioration of an EL layer due to oxidization can be prevented.Type: GrantFiled: February 15, 2001Date of Patent: November 15, 2005Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shunpei Yamazaki, Yasuyuki Arai, Mayumi Mizukami
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Patent number: 6958251Abstract: An object of the invention is to reduce the manufacturing cost of EL display devices and electronic devices incorporating the EL display devices. An EL material is formed by printing in an active matrix EL display device. Relief printing or screen printing may be used as the method of printing. Manufacturing steps of the EL layer is therefore simplified and reduction of manufacturing cost is devised.Type: GrantFiled: July 8, 2002Date of Patent: October 25, 2005Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shunpei Yamazaki, Mayumi Mizukami, Toshimitsu Konuma
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Publication number: 20050162092Abstract: Plurality of pixels (102) are arranged on the substrate. Each of the pixels (102) is provided with an EL element which utilizes as a cathode a pixel electrode (105) connected to a current control TFT (104). On a counter substrate (110), a light shielding film (112) is disposed at the position corresponding to periphery of each pixel (102), while a color filter (113) is disposed at the position corresponding to each of the pixels (102). This light shielding film makes the contour of the pixels clear, resulting in an image display with high definition. In addition, it is possible to fabricate the EL display device of the present invention with most of an existing manufacturing line for liquid crystal display devices. Thus, an amount of equipment investment can be significantly reduced, thereby resulting in a reduction in the total manufacturing cost.Type: ApplicationFiled: March 1, 2005Publication date: July 28, 2005Inventors: Shunpei Yamazaki, Mayumi Mizukami, Toshimitsu Konuma
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Publication number: 20050140280Abstract: 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: January 31, 2005Publication date: June 30, 2005Applicant: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shunpei Yamazaki, Takeshi Nishi, Mayumi Mizukami, Hisao Ikeda
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Patent number: 6894312Abstract: Plurality of pixels (102) are arranged on the substrate. Each of the pixels (102) is provided with an EL element which utilizes as a cathode a pixel electrode (105) connected to a current control TFT (104). On a counter substrate (110), a light shielding film (112) is disposed at the position corresponding to periphery of each pixel (102), while a color filter (113) is disposed at the position corresponding to each of the pixels (102). This light shielding film makes the contour of the pixels clear, resulting in an image display with high definition. In addition, it is possible to fabricate the EL display device of the present invention with most of an existing manufacturing line for liquid crystal display devices. Thus, an amount of equipment investment can be significantly reduced, thereby resulting in a reduction in the total manufacturing cost.Type: GrantFiled: July 26, 2002Date of Patent: May 17, 2005Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shunpei Yamazaki, Mayumi Mizukami, Toshimitsu Konuma
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Publication number: 20050099120Abstract: To provide a method of improving an efficiency for extracting light in a self light-emitting device using an organic EL material. In the self light-emitting device having a structure in which an EL layer (102) is sandwiched between a transparent electrode (103) and a cathode (101), a film thickness of the EL layer (102) and a film thickness of the transparent electrode (102) are equivalent to the film thicknesses in which there is no occurrence of a guided light, and an inert gas is filled in a space between the transparent electrode (103) and a cover material (105).Type: ApplicationFiled: December 22, 2004Publication date: May 12, 2005Inventors: Tetsuo Tsutsui, Toshimitsu Konuma, Mayumi Mizukami
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Patent number: 6872672Abstract: An object of the invention is reducing a manufacturing cost of an EL display device and an electronic device equipped therewith. In an active matrix type EL display device, an EL material for a pixel portion is formed by coating steps using a dispenser device. As a discharge port of the dispenser is made into a linear shape, the throughput is increased. Such the dispenser device is used, so that it is possible to simplify the EL layer forming steps, then, to reduce the manufacturing cost.Type: GrantFiled: August 16, 2002Date of Patent: March 29, 2005Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shunpei Yamazaki, Mayumi Mizukami, Toshimitsu Konuma
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Publication number: 20050056832Abstract: There is provided an electronic device having high reliability and high color reproducibility. A pixel structure is made such that a switching FET (201) and an electric current controlling FET (202) are formed on a single crystal semiconductor substrate (11), and an EL element (203) is electrically connected to the electric current controlling FET (202). The fluctuation in characteristics of the electric current controlling FET (202) is very low among pixels, and an image with high color reproducibility can be obtained. By taking hot carrier measures in the electric current controlling FET (202), the electronic device having high reliability can be obtained.Type: ApplicationFiled: October 5, 2004Publication date: March 17, 2005Inventors: Shunpei Yamazaki, Toshimitsu Konuma, Jun Koyama, Kazutaka Inukai, Mayumi Mizukami
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Patent number: 6864628Abstract: 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: August 24, 2001Date of Patent: March 8, 2005Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shunpei Yamazaki, Takeshi Nishi, Mayumi Mizukami, Hisao Ikeda
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Patent number: 6847163Abstract: To provide a method of improving an efficiency for extracting light in a self light-emitting device using an organic EL material. In the self light-emitting device having a structure in which an EL layer (102) is sandwiched between a transparent electrode (103) and a catrode (101), a film thickness of the EL layer (102) and a film thickness of the transparent electrode (102) are equivalent to the film thicknesses in which there is no occurrence of a guided light, and an inert gas is filled in a space between the transparent electrode (103) and a cover material (105).Type: GrantFiled: October 25, 2000Date of Patent: January 25, 2005Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Tetsuo Tsutsui, Toshimitsu Konuma, Mayumi Mizukami
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Patent number: 6809343Abstract: There is provided an electronic device having high reliability and high color reproducibility. A pixel structure is made such that a switching FET (201) and an electric current controlling FET (202) are formed on a single crystal semiconductor substrate (11), and an EL element (203) is electrically connected to the electric current controlling FET (202). The fluctuation in characteristics of the electric current controlling FET (202) is very low among pixels, and an image with high color reproducibility can be obtained. By taking hot carrier measures in the electric current controlling FET (202), the electronic device having high reliability can be obtained.Type: GrantFiled: June 5, 2003Date of Patent: October 26, 2004Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shunpei Yamazaki, Toshimitsu Konuma, Jun Koyama, Kazutaka Inukai, Mayumi Mizukami
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Patent number: 6803246Abstract: Two aspects, an impurity factor and a structural factor are assumed as the deterioration causes of an organic light emitting device and means for solving the respective factors are provided. In order to prevent deterioration of the light emitting device, concentrations of moisture and oxygen, which are left in a space in which an organic light emitting element is sealed, are minimized. At the same time, an impurity including oxygen, such as moisture or oxygen which is included in an organic compound composing the organic light emitting element, is reduced. An element structure for preventing the deterioration of the organic light emitting element due to stress is used to suppress the deterioration.Type: GrantFiled: October 10, 2003Date of Patent: October 12, 2004Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shunpei Yamazaki, Mayumi Mizukami, Yasuyuki Arai