Patents by Inventor Shiro Ueda
Shiro Ueda 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: 20070182881Abstract: A liquid-crystal display device includes a liquid-crystal display panel having a liquid-crystal layer sandwiched between a pair of substrates, and a backlight unit provided on a surface opposite to a display surface of the liquid-crystal display panel. The backlight unit has an accommodator capable of having at least one optical sheet arranged therein and having a sidewall having a projection at a periphery thereof. The optical sheet has a hole into which the projection is inserted, the hole formed in the optical sheet having a form that is the same as the top plan form of the tip of the projection, the hole being formed in the optical sheet so that a certain rotation angle is established between the form of the hole and a top plan form of the tip of the projection in a state in which the optical sheet is accommodated in the accommodator.Type: ApplicationFiled: April 5, 2007Publication date: August 9, 2007Inventors: Takeshi Harayama, Shiro Ueda, Fumitoshi Matsuda, Nobuyuki Mitsuhashi
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Publication number: 20070009820Abstract: A display device includes: a reflection plate; plural light sources disposed above the reflection plate; an optical member disposed above the plural light sources; a support member disposed standing on a bottom surface of the reflection plate; a frame member that houses the reflection plate and the light sources; and a display panel disposed above the optical member. The support member includes: a standing support portion that is disposed standing on and supports the reflection plate; an optical member support portion that supports the optical member; and a leg portion that protrudes downward of the reflection plate and the frame member and is bent in a direction along the standing support member.Type: ApplicationFiled: July 5, 2006Publication date: January 11, 2007Inventor: Shiro Ueda
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Publication number: 20070008450Abstract: There is disclosed a display device having a display panel which is prevented from being scratched if an optical member such as a diffusive plate located behind the display panel swings. The display device has the display panel, an array of light sources disposed behind the display panel, and the optical member disposed between the display panel and the array of light sources. The distance between a first end of the optical member and the display panel is set greater than the distance between a second end of the optical member and the display panel, the second end being opposite to the first end.Type: ApplicationFiled: July 5, 2006Publication date: January 11, 2007Inventor: Shiro Ueda
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Publication number: 20060077333Abstract: In a liquid crystal display comprising a plurality of pixels each of which has an switching element, a plurality of drain drivers and gate drivers for operating the switching elements and the pixels, and a plurality of drain lines and gate lines supplying signals from the drain drivers and the gate drivers to the switching elements being formed on one of a pair of substrates sandwiching a liquid crystal layer, the present invention provides wiring lines formed on the one of a pair of substrates for transferring display data signals and a clock signal between each pair of the plurality of drain drivers adjacent to one another, and provides at least one gate circuit for at least one of the plurality of drain drivers which is controlled by the clock signal and switches the display data signals and the clock signal either (1) to be acquired by the at least one of the plurality of drain drivers or (2) to be transferred to another of the plurality of drain drivers arranged adjacent to the at least one of the pluralType: ApplicationFiled: November 22, 2005Publication date: April 13, 2006Inventors: Yoshihiro Imajo, Tetsuro Izawa, Kimitoshi Ohgiichi, Hiroshi Okawara, Shiro Ueda, Nobuyuki Ishige, Tetsuya Kawamura, Hisashi Ishino, Fumiaki Komori
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Patent number: 6980190Abstract: A liquid crystal display device includes a driver circuit for outputting a charging voltage at a beginning of a horizontal scanning period and then a gray scale voltage corresponding to a display data to a video signal line. The liquid crystal display device is driven by inverting a polarity of the gray scale voltage on a pixel electrode with respect to a common voltage on a common electrode every N lines of scanning lines, where N?2 and by making a first charging time of the charging voltage corresponding to a first line of N lines of the scanning lines scanned immediately after inversion of the polarity of the gray scale voltage different from a second charging time of the charging voltage corresponding to a second line of the N lines scanned immediately succeeding the first line.Type: GrantFiled: January 7, 2003Date of Patent: December 27, 2005Assignee: Hitachi, Ltd.Inventor: Shiro Ueda
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Publication number: 20050110920Abstract: Optical sheets can be fixed easily and positively in a liquid-crystal display device having a liquid-crystal display panel in which a liquid-crystal layer sandwiched between a pair of substrates and a lighting unit provided on a surface opposite to a display surface of the liquid-crystal display panel. For this purpose, a projection is provided on a sidewall of an accommodator, and the projection is inserted into a hole provided in optical sheets arranged within the accommodator, thereby fixing the optical sheets in the accommodator. The length along a certain straight line of a top plan form of a tip of the projection is longer than the length along the certain straight line of the hole formed in the optical sheets, thus preventing the optical sheets from falling out of the accommodator.Type: ApplicationFiled: October 15, 2004Publication date: May 26, 2005Inventors: Takeshi Harayama, Shiro Ueda, Fumitoshi Matsuda, Nobuyuki Mitsuhashi
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Patent number: 6842164Abstract: In a liquid crystal display comprising a plurality of pixels each of which has an switching element, a plurality of drain drivers and gate drivers for operating the switching elements and the pixels, and a plurality of drain lines and gate lines supplying signals from the drain drivers and the gate drivers to the switching elements being formed on one of a pair of substrates sandwiching a liquid crystal layer, the present invention provides wiring lines formed on the one of a pair of substrates for transferring display data signals and a clock signal between each pair of the plurality of drain drivers adjacent to one another, and provides at least one gate circuit for at least one of the plurality of drain drivers which is controlled by the clock signal and switches the display data signals and the clock signal either (1) to be acquired by the at least one of the plurality of drain drivers or (2) to be transferred to another of the plurality of drain drivers arranged adjacent to the at least one of the pluralType: GrantFiled: December 30, 2003Date of Patent: January 11, 2005Assignees: Hitachi, Ltd., Hitachi Device Engineering Co., Ltd.Inventors: Yoshihiro Imajo, Tetsuro Izawa, Kimitoshi Ohgiichi, Hiroshi Okawara, Shiro Ueda, Nobuyuki Ishige, Tetsuya Kawamura, Hisashi Ishino, Fumiaki Komori
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Publication number: 20040150780Abstract: In a liquid crystal display comprising a plurality of pixels each of which has an switching element, a plurality of drain drivers and gate drivers for operating the switching elements and the pixels, and a plurality of drain lines and gate lines supplying signals from the drain drivers and the gate drivers to the switching elements being formed on one of a pair of substrates sandwiching a liquid crystal layer, the present invention provides wiring lines formed on the one of a pair of substrates for transferring display data signals and a clock signal between each pair of the plurality of drain drivers adjacent to one another, and provides at least one gate circuit for at least one of the plurality of drain drivers which is controlled by the clock signal and switches the display data signals and the clock signal either (1) to be acquired by the at least one of the plurality of drain drivers or (2) to be transferred to another of the plurality of drain drivers arranged adjacent to the at least one of the pluralType: ApplicationFiled: December 30, 2003Publication date: August 5, 2004Applicant: Hitachi, Ltd. and Hitachi Device Engineering Co., Ltd.Inventors: Yoshihiro Imajo, Tetsuro Izawa, Kimitoshi Ohgiichi, Hiroshi Okawara, Shiro Ueda, Nobuyuki Ishige, Tetsuya Kawamura, Hisashi Ishino, Fumiaki Komori
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Publication number: 20040150603Abstract: In a liquid crystal display comprising a plurality of pixels each of which has an switching element, a plurality of drain drivers and gate drivers for operating the switching elements and the pixels, and a plurality of drain lines and gate lines supplying signals from the drain drivers and the gate drivers to the switching elements being formed on one of a pair of substrates sandwiching a liquid crystal layer, the present invention provides wiring lines formed on the one of a pair of substrates for transferring display data signals and a clock signal between each pair of the plurality of drain drivers adjacent to one another, and provides at least one gate circuit for at least one of the plurality of drain drivers which is controlled by the clock signal and switches the display data signals and the clock signal either (1) to be acquired by the at least one of the plurality of drain drivers or (2) to be transferred to another of the plurality of drain drivers arranged adjacent to the at least one of the pluralType: ApplicationFiled: December 30, 2003Publication date: August 5, 2004Applicants: Hitachi, Ltd., Hitachi Device Engineering Co., Ltd.Inventors: Yoshihiro Imajo, Tetsuro Izawa, Kimitoshi Ohgiichi, Hiroshi Okawara, Shiro Ueda, Nobuyuki Ishige, Tetsuya Kawamura, Hisashi Ishino, Fumiaki Komori
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Patent number: 6697040Abstract: In a liquid crystal display comprising a plurality of pixels each of which has an switching element, a plurality of drain drivers and gate drivers for operating the switching elements and the pixels, and a plurality of drain lines and gate lines supplying signals from the drain drivers and the gate drivers to the switching elements being formed on one of a pair of substrates sandwiching a liquid crystal layer, the present invention provides wiring lines formed on the one of a pair of substrates for transferring display data signals and a clock signal between each pair of the plurality of drain drivers adjacent to one another, and provides at least one gate circuit for at least one of the plurality of drain drivers which is controlled by the clock signal and switches the display data signals and the clock signal either (1) to be acquired by the at least one of the plurality of drain drivers or (2) to be transferred to another of the plurality of drain drivers arranged adjacent to the at least one of the pluralType: GrantFiled: February 13, 2001Date of Patent: February 24, 2004Assignees: Hitachi, Ltd., Hitachi Device Engineering Co., Ltd.Inventors: Yoshihiro Imajo, Tetsuro Izawa, Kimitoshi Ohgiichi, Hiroshi Okawara, Shiro Ueda, Nobuyuki Ishige, Tetsuya Kawamura, Hisashi Ishino, Fumiaki Komori
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Publication number: 20030213180Abstract: A waterproof device arranged on an upper doorframe for a rolling barrier of the door consists of a fixing member securely attached on the upper doorframe and a rubber gasket member pivotally connected with the fixing member. The fixing member particularly has a cylindrical groove. The rubber gasket member is integrally formed with a cylindrical connecting portion pivotally fitted in the cylindrical groove and a tongue-like extension portion extended through an opening of the cylindrical groove. The length of the tongue-like extension portion is larger than a distance between the fixing member and the rolling barrier. When the rolling barrier is drawn downward, a retaining block formed on the rolling barrier presses tightly against an inner side surface of an outer end of the extension portion, therefore the upper doorframe of the rolling barrier is prevented from being penetrated by rain water.Type: ApplicationFiled: May 20, 2002Publication date: November 20, 2003Inventor: Shiro Ueda
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Publication number: 20030132903Abstract: A liquid crystal display device includes a driver circuit for outputting a charging voltage at a beginning of a horizontal scanning period and then a gray scale voltage corresponding to a display data to a video signal line. The liquid crystal display device is driven by inverting a polarity of the gray scale voltage on a pixel electrode with respect to a common voltage on a common electrode every N lines of scanning lines, where N≧2 and by making a first charging time of the charging voltage corresponding to a first line of N lines of the scanning lines scanned immediately after inversion of the polarity of the gray scale voltage different from a second charging time of the charging voltage corresponding to a second line of the N lines scanned immediately succeeding the first line.Type: ApplicationFiled: January 7, 2003Publication date: July 17, 2003Inventor: Shiro Ueda
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Publication number: 20010015709Abstract: In a liquid crystal display comprising a plurality of pixels each of which has an switching element, a plurality of drain drivers and gate drivers for operating the switching elements and the pixels, and a plurality of drain lines and gate lines supplying signals from the drain drivers and the gate drivers to the switching elements being formed on one of a pair of substrates sandwiching a liquid crystal layer, the present invention provides wiring lines formed on the one of a pair of substrates for transferring display data signals and a clock signal between each pair of the plurality of drain drivers adjacent to one another, and provides at least one gate circuit for at least one of the plurality of drain drivers which is controlled by the clock signal and switches the display data signals and the clock signal either (1) to be acquired by the at least one of the plurality of drain drivers or (2) to be transferred to another of the plurality of drain drivers arranged adjacent to the at least one of the pluralType: ApplicationFiled: February 13, 2001Publication date: August 23, 2001Applicant: Hitachi, Ltd.Inventors: Yoshihiro Imajo, Tetsuro Izawa, Kimitoshi Ohgiichi, Hiroshi Okawara, Shiro Ueda, Nobuyuki Ishige, Tetsuya Kawamura, Hisashi Ishino, Fumiaki Komori
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Patent number: 5949502Abstract: A liquid crystal display device in which counter-measures are taken for static electricity from the step of forming wiring lines of a substrate on the side where thin film transistors or switching elements are formed to the step of completing module mounting is suited for improving the productivity and for lowering the production cost of the display device. For this purpose, the liquid crystal display device is characterized in that resistor elements for connecting gate lines or drain lines are disposed inside a seal and are arranged in one or more lines outside an effective pixel region, or additional gate lines and additional pixels are arranged in a plurality of lines outside the first gate line or the last gate line in the effective pixel region, and the additional gate lines are short-circuited with each other at their end portions.Type: GrantFiled: December 17, 1997Date of Patent: September 7, 1999Assignee: Hitachi, Ltd.Inventors: Kuniyuki Matsunaga, Makoto Tsumura, Junichi Ohwada, Masahiko Suzuki, Shiro Ueda
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Patent number: 5838412Abstract: To make it possible to prevent disconnection of the wiring on a driving multilayer flexible circuit board when folding the board, to reliably fold the circuit board, to improve the assemblability and the reliability or a backlight member, and to improve the noise resistance in a clip-chip-type liquid crystal display device using the circuit board, one end of a flexible substrate FPC2 is connected to an end of one transparent glass substrate SUB1 constituting a liquid crystal display element, the intermediate portion of the flexible substrate FPC2 is folded nearby the outside of an end side of the substrate SUB1, the other end of the substrate FPC2 is arranged at the lower side of an end of the substrate SUB1, and an end of a film BFI of the flexible substrate FPC2 is formed into a waved pattern along the folding line.Type: GrantFiled: November 4, 1996Date of Patent: November 17, 1998Assignees: Hitachi, Ltd., Hitachi Device Engineering Co., Ltd.Inventors: Shiro Ueda, Katsuhiko Shibata, Masumi Sasuga, Norihisa Fukayama, Naoto Kobayashi
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Patent number: 5838400Abstract: A liquid crystal device in which a peripheral circuit board positioned in the outer periphery of a seal port is recessed to avoid the projection of the seal port and in which a fluorescent tube has its two lamp cables arranged around the four sides of a crystal display element, so that the substrate at the seal port side and the lamp cable of a side light type back light can be packaged in compact.Type: GrantFiled: January 14, 1997Date of Patent: November 17, 1998Assignees: Hitachi, Ltd., Hitachi Device Engineering Co., Ltd.Inventors: Shiro Ueda, Shunichi Kumaoka, Masumi Sasuga, Katsuhiko Shibata, Yoichi Igarashi, Naoto Kobayashi
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Patent number: 5748267Abstract: A liquid crystal display capable of accommodating a common gate line in a proper position during the manufacture thereof has two transparent substrates opposed across a liquid crystal; a set of parallel gate lines extending in an x-direction on the surface of one of the transparent substrates, which faces the liquid crystal; a set of parallel drain lines extending in the y-direction on the surface and being insulated from the gate lines; and a gate scanning driver circuit connected with the individual gate lines outside of the display region in which the gate line set and the drain line set intersect. The common gate line is formed over a peripheral surface portion of the one transparent substrate, which surface portion is to be cut off at a subsequent manufacturing step, and is mounted on a region opposite to the gate scanning driver circuit on the other side of the display region therefrom for connecting the individual gate lines of the gate line set in common.Type: GrantFiled: August 22, 1995Date of Patent: May 5, 1998Assignee: Hitachi, Ltd.Inventors: Masataka Natori, Shunichi Kumaoka, Shiro Ueda
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Patent number: 5748179Abstract: A liquid crystal display device is provided which reduces the resistance of input wires disposed between a flexible board and driving ICs mounted in a flip-chip style, and enhances resistance against electrocorrosion of input terminals thereof. The liquid crystal display device includes two transparent insulating substrates (SUB1, SUB2) confronting each other through a liquid crystal layer, plural liquid crystal driving circuits (ICs) mounted in a flip-chip style on a surface of one of the substrates located at the side of the liquid crystal layer, a flexible board (FPC) for inputting a signal to each of the liquid crystal driving circuits, and plural input wires (Td) provided on the surface of the one substrate at the side of the liquid crystal layer to connect output terminals of the flexible board to input terminals of the liquid crystal driving circuits.Type: GrantFiled: May 13, 1996Date of Patent: May 5, 1998Assignee: Hitachi, Ltd.Inventors: Hikaru Ito, Masataka Natori, Masahiko Suzuki, Kimitoshi Ohgiichi, Kuniyuki Matsunaga, Junichi Ohwada, Masumi Sasuga, Shiro Ueda
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Patent number: 5739887Abstract: A liquid crystal display device. The liquid crystal display device has a peripheral circuit including a liquid crystal display having drive ICs COG-packaged on a transparent substrate, and a foldable multi-layered flexible substrate having two or more conductor layers, so that the compact packaging can be realized to reduce EMI noise and the number of parts. The liquid crystal display device may also include a display controller having two or more display control integrated circuit elements packaged therein, and drive ICs mounted by a chip-on-glass packaging on two sides of a liquid crystal display panel, usually, on the longer sides, so that the display controller excellent in the temperature resistance and advantageous in compact and a video signal line driving circuit board are uniformly arranged at the upper and lower sides of a screen. As a result, the vertical positioning of the screen can be made proper to take an advantage in the compact packaging.Type: GrantFiled: October 13, 1995Date of Patent: April 14, 1998Assignees: Hitachi, Ltd., Hitachi Device Engineering Co., Ltd.Inventors: Shiro Ueda, Shunichi Kumaoka, Masumi Sasuga, Katsuhiko Shibata, Yoichi Igarashi, Naoto Kobayashi
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Patent number: 5684550Abstract: A liquid crystal display device in which a back light is arranged below a liquid crystal display panel having a plurality of pixels arrayed on a transparent substrate surface and in which a prism plate having a plurality of stripe grooves arrayed in parallel is arranged between the liquid crystal display panel and the back light. If the stripe grooves has a pitch .lambda..sub.1 (mm) and if the pixels in parallel with the stripe grooves has a pitch .lambda..sub.2 (mm), the liquid crystal display device is constructed to satisfy a relation of .lambda..sub.1 .ltoreq.0.075.lambda..sub.2 /(.lambda..sub.2 +0.075). This construction can increase the brightness of the back light and prevent the interference fringes from being formed on the display frame.Type: GrantFiled: June 10, 1996Date of Patent: November 4, 1997Assignees: Hitachi, Ltd., Hitachi Device Engineering Co., Ltd.Inventors: Katsuhiko Shibata, Yoshio Toriyama, Naoto Kobayashi, Shiro Ueda