Patents by Inventor Iwao Takemoto
Iwao Takemoto 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: 7508431Abstract: A solid state imaging device that comprises a first, a second, and a third pixel, and a micro lens is provided. The first pixel has a first color filter. The second pixel has a second color filter, of which the color is different from the color of the first color filter. The third pixel has a third color filter, of which the color is different from the colors of the first color filter and the second color filter. The micro lens covers the first, the second, and the third pixels neighboring each other.Type: GrantFiled: June 16, 2005Date of Patent: March 24, 2009Assignee: Hoya CorporationInventors: Koichi Sato, Nobuaki Abe, Iwao Takemoto
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Patent number: 7492340Abstract: A liquid crystal display device has a liquid crystal display panel and a drive circuit for supplying gray scale voltages to pixels in the liquid crystal display panel. The drive circuit selects intended gray scale voltage levels from a gray scale voltage varying with time periodically by determining a timing corresponding to the intended voltage level of the gray scale voltage based upon a display data signal and time control signals supplied to the drive circuit. A stabilizer circuit is provided to a gray scale voltage line for supplying the gray scale voltage.Type: GrantFiled: March 22, 2006Date of Patent: February 17, 2009Assignees: Hitachi, Ltd., Hitachi Device Engineering Co., Ltd.Inventors: Hironobu Isami, Iwao Takemoto, Katsumi Matsumoto
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Publication number: 20080297501Abstract: A display device includes a dynamic ratioless shift register which is operated in a stable manner and can expand the degree of freedom of design. In the dynamic ratioless shift register which is provided with thin film transistors having semiconductor layers made of p-Si on a substrate surface, a node which becomes the floating state is connected to a fixed potential through a capacitance element.Type: ApplicationFiled: May 27, 2008Publication date: December 4, 2008Inventors: Toshio Miyazawa, Iwao Takemoto, Atsushi Hasegawa, Masashiro Maki, Kazutaka Goto
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Patent number: 7460098Abstract: A liquid crystal display device includes a plurality of pixels arranged in a matrix, a plurality of video signal lines for supplying video signal voltages to the pixels, respectively, and a drive circuit for selecting a voltage level of a gray scale voltage varying periodically. As one of the video signal voltages corresponding to display data to be supplied to one of the plurality of pixels. The drive circuit has a plurality of processing circuits connected to each other in series by a processing result transmitting line, and display data lines are formed to intersect with the processing result transmitting line for supplying the display data to the processing circuits. The processing circuits are arranged in correspondence with crossing points of the display data lines and the processing result transmitting line.Type: GrantFiled: June 24, 2005Date of Patent: December 2, 2008Assignee: Hitachi, Ltd.Inventors: Toshio Miyazawa, Hideo Sato, Hiroshi Kageyama, Iwao Takemoto
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Patent number: 7397472Abstract: A display device includes a dynamic ratio less shift register which is operated in a stable manner and can expand the degree of freedom of design. In the dynamic ratio less shift register which is provided with thin film transistors having semiconductor layers made of p-Si on a substrate surface, a node which becomes the floating state is connected to a fixed potential through a capacitance element.Type: GrantFiled: April 30, 2007Date of Patent: July 8, 2008Assignees: Hitachi, Ltd., Hitachi Device Engineering Co., Ltd.Inventors: Toshio Miyazawa, Iwao Takemoto, Atsushi Hasegawa, Masahiro Maki, Kazutaka Goto
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Patent number: 7352416Abstract: A liquid crystal display element comprising two transparent substrates, at least one of which is transparent, and a liquid crystal layer interposed between the two substrates. A plurality of pixels and active elements for driving the liquid crystal at the plurality of pixels are incorporated into at least one of the two substrates, and an optical axis of an incident light beam upon the liquid crystal layer is present in a plane which is substantially perpendicular to a direction of orientation of liquid crystal molecules on at least one of the two substrates, and the incident light impinges upon the liquid crystal layer in a direction which is inclined by a predetermined angle to the direction of the normal line of the substrate. With this arrangement, a desired phase modulation is obtained through slight motion of the liquid crystal molecules, thereby greatly reducing the liquid crystal drive voltage.Type: GrantFiled: February 26, 2002Date of Patent: April 1, 2008Assignee: Hitachi, Ltd.Inventors: Shoichi Hirota, Makoto Tsumura, Iwao Takemoto, Hideki Nakagawa, Satoshi Ouchi, Taro Imahase
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Publication number: 20070268227Abstract: A display device includes a dynamic ratio less shift register which is operated in a stable manner and can expand the degree of freedom of design. In the dynamic ratio less shift register which is provided with thin film transistors having semiconductor layers made of p-Si on a substrate surface, a node which becomes the floating state is connected to a fixed potential through a capacitance element.Type: ApplicationFiled: April 30, 2007Publication date: November 22, 2007Inventors: Toshio Miyazawa, Iwao Takemoto, Atsushi Hasegawa, Masashiro Maki, Kazutaka Goto
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Patent number: 7274411Abstract: A liquid crystal display element which has the high speed response and the high contrast and a display device employing the same are provided. In a display device employing a reflection type liquid crystal light valve, a retardation of a retardation plate which is provided between a polarizing element such as a polarizing beam splitter and the reflection type liquid crystal light valve is generally made ΒΌ of the wavelength of the incident light, and an optical axis (a slow axis or a fast axis) of the retardation plate and the polarizing direction of the incident polarized light are shifted from each other by slightly larger than 0 degree in order to arrange such optical elements.Type: GrantFiled: November 26, 2002Date of Patent: September 25, 2007Assignee: Hitachi, Ltd.Inventors: Shoichi Hirota, Katsuhide Aoto, Makoto Tsumura, Iwao Takemoto
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Patent number: 7274362Abstract: A display device includes a dynamic ratioless shift register which is operated in a stable manner and can expand the degree of freedom of design. In the dynamic ratioless shift register which is provided with thin film transistors having semiconductor layers made of p-Si on a substrate surface, a node which becomes the floating state is connected to a fixed potential through a capacitance element.Type: GrantFiled: June 2, 2004Date of Patent: September 25, 2007Assignees: Hitachi, Ltd., Hitachi Device Engineering Co., Ltd.Inventors: Toshio Miyazawa, Iwao Takemoto, Atsushi Hasegawa, Masashiro Maki, Kazutaka Goto
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Patent number: 7164403Abstract: A liquid crystal display device having a plurality of pixels arranged in a matrix, a plurality of video signal lines for supplying video signal voltages to the plurality of pixels, and a drive circuit which selects a voltage level of a gray scale voltage varying periodically as one of the video signal voltages corresponding to display data to be supplied to one of the plurality of pixels. The drive circuit has a plurality of series combinations of plural processing circuits, wherein each of the plurality of series combinations of plural processing circuits corresponds to one of the plurality of video signal lines, and each of the plural processing circuits comprises a parallel combination of a first switching element and a second switching element. The first and second switching elements are made operative or inoperative as a switch in accordance with different conditions.Type: GrantFiled: September 3, 2004Date of Patent: January 16, 2007Assignees: Hitachi, Ltd., Hitachi Device Engineering Co., Ltd.Inventors: Hironobu Isami, Iwao Takemoto, Toshio Miyazawa, Katsumi Matsumoto
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Patent number: 7148936Abstract: The present invention provides a projection type liquid crystal display device capable of achieving a high contrast ratio without causing optical leakage on boundary wavelength regions of three color light components in the case of a black display. The projection type liquid crystal display device is provided with a first and a second retarder stacks each of which has cut-off wavelengths. The cut-off wavelength on the short wavelength side of the first retarder stack is placed on a shorter wavelength side as compared with the cut-off wavelength on the short wavelength side of the second retarder stack, and the cut-off wavelength on the long wavelength side of the first retarder stack is placed on a longer wavelength side as compared with the cut-off wavelength on the long wavelength side of the second retarder stack.Type: GrantFiled: September 27, 2002Date of Patent: December 12, 2006Assignee: Hitachi, Ltd.Inventors: Shoichi Hirota, Iwao Takemoto, Hideki Nakagawa, Katsuhide Aoto
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Patent number: 7116298Abstract: A display device includes a dynamic ratioless shift register which is operated in a stable manner and can expand the degree of freedom of design. In the dynamic ratioless shift register which is provided with thin film transistors having semiconductor layers made of p-Si on a substrate surface, a node which becomes the floating state is connected to a fixed potential through a capacitance element.Type: GrantFiled: June 24, 2004Date of Patent: October 3, 2006Assignees: Hitachi, Ltd., Hitachi Device Engineering Co., Ltd.Inventors: Toshio Miyazawa, Iwao Takemoto, Atsushi Hasegawa, Masashiro Maki, Kazutaka Goto
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Publication number: 20060164357Abstract: A liquid crystal display device has a liquid crystal display panel and a drive circuit for supplying gray scale voltages to pixels in the liquid crystal display panel. The drive circuit selects intended gray scale voltage levels from a gray scale voltage varying with time periodically by determining a timing corresponding to the intended voltage level of the gray scale voltage based upon a display data signal and time control signals supplied to the drive circuit. A stabilizer circuit is provided to a gray scale voltage line for supplying the gray scale voltage.Type: ApplicationFiled: March 22, 2006Publication date: July 27, 2006Inventors: Hironobu Isami, Iwao Takemoto, Katsumi Matsumoto
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Patent number: 7042430Abstract: A liquid crystal display device has a liquid crystal display panel and a drive circuit for supplying gray scale voltages to pixels in the liquid crystal display panel. The drive circuit selects desired gray scale voltage levels from a gray scale voltage varying with time in a staircase fashion, in accordance with display data, and supplies the selected gray scale voltage levels to the pixels. The drive circuit includes a stabilizer circuit provided to a gray scale voltage line for supplying the gray scale voltage varying with time.Type: GrantFiled: March 18, 2003Date of Patent: May 9, 2006Assignees: Hitachi, Ltd., Hitachi Device Engineering Co., Ltd.Inventors: Hironobu Isami, Iwao Takemoto, Katsumi Matsumoto
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Publication number: 20060001755Abstract: A solid state imaging device is provided that comprises a photoelectric conversion element, a capacitor, a transfer transistor, a reset transistor, an amplifier transistor, and an electrical conductor. The solid state imaging device has a light receiving surface comprising plural pixels. The photoelectric conversion element generates an electrical charge according to the received light amounts. The capacitor receives the electrical charge from the photoelectric conversion element. The reset transistor sweeps out the electrical charge stored in the capacitor. The amplifier transistor outputs a pixel signal according to a voltage of the capacitor. The select-line connects with a main electrode of the amplifier transistor. Through the select-line, either the ON-signal or the OFF-signal flows. The ON-signal makes an amplifier transistor output the pixel signal. The OFF-signal makes the amplifier transistor stop outputting the pixel signal.Type: ApplicationFiled: June 21, 2005Publication date: January 5, 2006Applicant: PENTAX CorporationInventors: Koichi Sato, Iwao Takemoto
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Publication number: 20050280727Abstract: A solid state imaging device that comprises a first, a second, and a third pixel, and a micro lens is provided. The first pixel has a first color filter. The second pixel has a second color filter, of which the color is different from the color of the first color filter. The third pixel has a third color filter, of which the color is different from the colors of the first color filter and the second color filter. The micro lens covers the first, the second, and the third pixels neighboring each other.Type: ApplicationFiled: June 16, 2005Publication date: December 22, 2005Applicant: PENTAX CorporationInventors: Koichi Sato, Nobuaki Abe, Iwao Takemoto
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Publication number: 20050280620Abstract: A liquid crystal display device which includes a first substrate, a second substrate, a liquid crystal composition sandwiched between the first substrate and the second substrate, and a plurality of pixels disposed on the first substrate. Each of the plurality of pixels is supplied with a video signal via a switching element. Each of the plurality of pixels is provided with a capacitance having two electrodes in which one is connected to a first electrode of a corresponding one of the plurality of pixels and another is supplied with a pixel-potential control signal by a pixel-potential control circuit. The pixel-potential control circuit enables selection of a first voltage level and a second voltage level.Type: ApplicationFiled: August 29, 2005Publication date: December 22, 2005Inventors: Haruhisa Iida, Iwao Takemoto, Katsumi Matsumoto, Shigeo Adachi
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Patent number: 6961041Abstract: A liquid crystal display device has a liquid crystal composition sandwiched between a pair of substrates, and a plurality of pixels disposed on one of the first substrates. Each of the pixels is supplied with a video signal via a switching element connected to a first electrode thereof, and is provided with a capacitance. One of two capacitance-forming electrodes forming the capacitance is connected to the first electrode of a corresponding one of the pixels, and another of the two capacitance-forming electrodes is supplied with a pixel-potential control signal. Polarity of the video signal reverses with respect to a first reference voltage with a repetition period, and the pixel-potential control signal alternates between two voltage levels of same polarity with respect to a second reference voltage such that a voltage swing on the first electrodes of the pixels becomes larger than that of the video signal.Type: GrantFiled: March 15, 2002Date of Patent: November 1, 2005Assignees: Hitachi, Ltd., Hitachi Device Engineering Co., Ltd.Inventors: Haruhisa Ilda, Iwao Takemoto, Katsumi Matsumoto, Shigeo Adachi
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Publication number: 20050237289Abstract: A liquid crystal display device includes a plurality of pixels arranged in a matrix, a plurality of video signal lines for supplying video signal voltages to the pixels, respectively, and a drive circuit for selecting a voltage level of a gray scale voltage varying periodically. As one of the video signal voltages corresponding to display data to be supplied to one of the plurality of pixels. The drive circuit has a plurality of processing circuits connected to each other in series by a processing result transmitting line, and display data lines are formed to intersect with the processing result transmitting line for supplying the display data to the processing circuits. The processing circuits are arranged in correspondence with crossing points of the display data lines and the processing result transmitting line.Type: ApplicationFiled: June 24, 2005Publication date: October 27, 2005Inventors: Toshio Miyazawa, Hideo Sato, Hiroshi Kageyama, Iwao Takemoto
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Patent number: 6952246Abstract: A liquid crystal display device includes plural reflective electrodes supplied with a video signal, second light-blocking conductive films below the reflective electrodes with a first insulating layer therebetween, and a first light-blocking film below the second light-blocking conductive films so as to cover spacing between the second light-blocking conductive films. Each of the second light-blocking films is electrically connected to a corresponding one of the reflective electrodes, and is disposed to cover at least a portion of spacings between the corresponding one of the reflective electrodes and ones of the reflective electrodes adjacent thereto. A second insulating layer is interposed between the first and second light-blocking films, and its thickness is from 150 nm to 450 nm.Type: GrantFiled: July 16, 2004Date of Patent: October 4, 2005Assignees: Hitachi, Ltd., Hitachi Device Engineering Co., Ltd.Inventors: Katsumi Matsumoto, Iwao Takemoto, Hideki Nakagawa, Eiichiro Ito, Atsumu Iguchi, Kenji Kitajima, Masatoshi Furihata, Takeshi Ohashi, Shigeo Nakamura, Kouki Sakai