Patents by Inventor Mutsumi Nakajima
Mutsumi Nakajima 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: 20100033665Abstract: There is provided a liquid crystal display device that can suppress a reduction in picture quality of a display image that is caused when one of adjacent pixels is affected by a fluctuation in electric potential of the other pixel. A liquid crystal display device including an array substrate that includes pixel electrodes and a plurality of TFTs that drive the pixel electrodes is used. Each of the TFTs is arranged in a region directly below one of the pixel electrodes that is different from and adjacent to the pixel electrode to be driven thereby. Further, the TFT includes a silicon film provided with a diffusion layer, as well as a gate electrode provided on the silicon film via an insulating film. The silicon film is formed so as to range from a region directly below the pixel electrode to be driven by the TFT to the region directly below the pixel electrode.Type: ApplicationFiled: December 11, 2007Publication date: February 11, 2010Inventors: Kohei Tanaka, Keisuke Yoshida, Mutsumi Nakajima
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Publication number: 20100033456Abstract: An object of the present invention is to provide a display device that achieves a balance between color reproducibility and luminance under the premise that the display device uses a display panel in which each pixel is configured by sub-pixels of four or more colors. An outside light detecting unit (500) outputs a current Ia according to the intensity of outside light. A switching control circuit (600) outputs a display mode selection signal (S) for selecting a display mode, based on the magnitude of the current (Ia). An output selection circuit (120) provides RGB image signals to an input selection circuit (160) when in a first display mode (when it is dark) and provides RGB image signals to a gray scale value converting unit (140) when in a second display mode (when it is bright). In the first display mode, a W image signal generated by a black signal generation circuit (130) is used as a gray scale signal (DV).Type: ApplicationFiled: February 28, 2008Publication date: February 11, 2010Inventors: Keisuke Yoshida, Mutsumi Nakajima
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Patent number: 7605885Abstract: A first electrode substrate of the present invention includes a first signal line, a second signal line, a third signal line, a first pixel electrode, a second pixel electrode, and a third pixel electrode. The first signal line, the second signal line and the third signal line extend in a first direction and in parallel to one another. The first pixel electrode is electrically connected to the first signal line. The second pixel electrode is adjacent to the first pixel electrode in the first direction, and is electrically connected to the second signal line. The third pixel electrode is adjacent to the second pixel electrode in the row direction, crossing the first direction, via the second signal line therebetween, and is electrically connected to the third signal line.Type: GrantFiled: August 15, 2005Date of Patent: October 20, 2009Assignee: Sharp Kabushiki KaishaInventors: Keiichi Ina, Keisuke Yoshida, Ichiro Shiraki, Mutsumi Nakajima
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Publication number: 20090219476Abstract: A vertically aligned system liquid crystal display in which deterioration in display quality such as graininess, burn-in, afterimages due to disorder in orientation of liquid crystal molecules based on a connection electrodes for interconnecting sub-pixel electrodes can be prevented, and a method for manufacturing such liquid crystal display. In the liquid crystal display, each pixel electrode (2) of a liquid crystal panel is constituted by combining at least two sub-pixel electrodes (2a), and each sub-pixel electrode (2a) is connected through a bridge (3) narrower than the sub-pixel electrode (2a). A vertically aligned system in which liquid crystal molecules tilt symmetrically to the central axis of orientation in the direction perpendicular to the surface of each sub-pixel electrode (2a) upon application of a voltage is employed. The bridge (3) is provided at a position asymmetric to the sub-pixel electrode (2a).Type: ApplicationFiled: June 21, 2006Publication date: September 3, 2009Inventors: Yasutoshi Tasaka, Mutsumi Nakajima, Masayuki Inoue, Keisuke Yoshida, Hirofumi Katsuse
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Publication number: 20090207329Abstract: A liquid crystal display includes a plurality of pixels arranged in a matrix array, each pixel including a liquid crystal capacitor which includes a pixel electrode subjected to switching by a top-gate type thin film transistor, a counter electrode opposing the pixel electrode, and a liquid crystal layer disposed therebetween, and a first storage capacitor and a second storage capacitor which are in parallel electrical connection to the liquid crystal capacitor. The first storage capacitor includes a first storage capacitor electrode which is electrically connected to the pixel electrode, a first storage-capacitor counter electrode opposing the first storage capacitor electrode, and a first dielectric layer disposed therebetween. The second storage capacitor includes a second storage capacitor electrode which is electrically connected to the pixel electrode, a second storage-capacitor counter electrode opposing the second storage capacitor electrode, and a second dielectric layer disposed therebetween.Type: ApplicationFiled: February 6, 2007Publication date: August 20, 2009Applicant: SHARP KABUSHIKI KAISHAInventors: Yoshimizu Moriya, Mutsumi Nakajima
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Publication number: 20090073358Abstract: Realizes a structure for a transreflective liquid crystal display device in which one pixel is defined by four or more picture elements, the structure providing a high aperture ratio and being suitable for display for which the transmission mode is prioritized. A liquid crystal display device according to the present invention is a transreflective liquid crystal display device, comprising a plurality of picture elements including a first picture element, a second picture element, a third picture element and a fourth picture element for displaying different colors from one another; in which each of the plurality of picture elements includes a transmission area for providing display in a transmission mode and a reflection area for providing display in a reflection mode. Each picture element includes a mesh portion shaped to be meshable with an adjacent picture element; and the reflection area of each picture element is located in the mesh portion.Type: ApplicationFiled: February 19, 2007Publication date: March 19, 2009Inventors: Tokio Taguchi, Kazuhiko Tsuda, Mutsumi Nakajima, Keisuke Yoshida, Junichi Yamada
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Patent number: 7436477Abstract: An active substrate is provided, which comprises a switching element comprising a first drive region and a second drive region, a signal line being connected to the first drive region, a pixel electrode connected to the second drive region, a first layer comprising at least one of a semiconductor material and a conductive material, and connected to the pixel electrode, a second layer comprising at least one of a semiconductor material and a conductive material, and connected to the signal line; and an insulating film provided between the first layer and the second layer. At least a portion of the first layer and at least a portion of the second layer overlap each other so that the first layer and the second layer are short-circuited by applying first energy to the insulating film.Type: GrantFiled: September 17, 2004Date of Patent: October 14, 2008Assignee: Sharp Kabushiki KaishaInventors: Mutsumi Nakajima, Ichirou Shiraki, Osamu Sasaki, Hironobu Tatsumi, Hirofumi Katsuse, Masayuki Inoue, Hideo Kasugai, Keisuke Yoshida
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Patent number: 7394513Abstract: A display device includes: a plurality of signal lines which extend in a zigzag manner in a column direction and to which image signals are supplied, respectively; an insulation film which covers the plurality of signal lines; and a plurality of pixel electrodes which are formed on the insulation film and to which the image signals are input from the plurality of signal lines, respectively. A distance between ones of the pixel electrodes located adjacent to each other in the column direction is equal to or larger than a line width of the signal lines.Type: GrantFiled: February 2, 2005Date of Patent: July 1, 2008Assignee: Sharp Kabushiki KaishaInventors: Shoichi Andou, Mutsumi Nakajima, Ichiro Shiraki, Keisuke Yoshida, Keiichi Ina
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Publication number: 20080094530Abstract: A first electrode substrate of the present invention includes a first signal line, a second signal line, a third signal line, a first pixel electrode, a second pixel electrode, and a third pixel electrode. The first signal line, the second signal line and the third signal line extend in a first direction and in parallel to one another. The first pixel electrode is electrically connected to the first signal line. The second pixel electrode is adjacent to the first pixel electrode in the first direction, and is electrically connected to the second signal line. The third pixel electrode is adjacent to the second pixel electrode in the row direction, crossing the first direction, via the second signal line therebetween, and is electrically connected to the third signal line.Type: ApplicationFiled: August 15, 2005Publication date: April 24, 2008Applicant: SHARP KABUSHIKI KAISHAInventors: Keiichi Ina, Keisuke Yoshida, Ichiro Shiraki, Mutsumi Nakajima
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Patent number: 7330222Abstract: A display device includes a source line for supplying a display signal, a display pixel electrode, and a TFT for switching an electrical connection between the source line and the pixel electrode. The TFT includes a source electrode electrically connected to the source line, a drain electrode electrically connected to the pixel electrode, and a gate electrode for controlling an electrical connection between the source electrode and the drain electrode. A first auxiliary capacitor electrode and a second auxiliary capacitor electrode are connected to the drain electrode and respective connection portions between the drain electrode and the auxiliary capacitor electrodes are formed of a semiconductor material.Type: GrantFiled: February 3, 2005Date of Patent: February 12, 2008Assignee: Sharp Kabushiki KaishaInventors: Ichiro Shiraki, Mutsumi Nakajima, Keisuke Yoshida, Shoichi Andou, Masayuki Inoue, Hirofumi Katsuse, Junichi Yamada
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Patent number: 7242442Abstract: In an active matrix substrate for allowing a point defect of a defect pixel portion, among a plurality of pixel portions arranged two-dimensionally, to be repaired by radiation of energy, the active matrix substrate includes one of a first protection member for absorbing excessive energy power and preventing pieces of a conductive material from being scattered; and a second protection member for preventing pieces of a conductive material from being scattered and for preventing a conductive layer from bulging. One of the first protection member and the second protection member is provided above at least one energy radiation portion.Type: GrantFiled: September 10, 2004Date of Patent: July 10, 2007Assignee: Sharp Kabushiki KaishaInventors: Mutsumi Nakajima, Ichirou Shiraki, Hideo Kasugai, Hironobu Tatsumi, Hirofumi Katsuse, Osamu Sasaki, Masayuki Inoue
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Patent number: 7224032Abstract: A display device of the present invention comprises: a source line; a pixel electrode; a first TFT for switching an electrical connection between the source line and the pixel electrode; and a second TFT as a spare. The second TFT includes a semiconductor film and a gate electrode. The semiconductor film includes a source electrode and a drain electrode. The gate electrode is provided on the semiconductor film with a gate insulation film interposed therebetween. The display device includes an interlayer insulation film between the source line and the semiconductor film of the second TFT. The interlayer insulation film is thicker than the gate insulation film. When the first TFT is unusable, a contact hole is formed in the interlayer insulation film such that the source line is electrically connected to the source electrode, whereby the electrical connection between the source line and the pixel electrode is rendered switchable by the second TFT.Type: GrantFiled: February 3, 2005Date of Patent: May 29, 2007Assignee: Sharp Kabushiki KaishaInventors: Ichiro Shiraki, Mutsumi Nakajima, Keisuke Yoshida, Shoichi Andou, Masayuki Inoue
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Patent number: 7158129Abstract: An input device includes: a sense line; a CS line to which an output voltage is applied; a TFT having a control terminal, a first terminal connected to the sense line, and a second terminal connected to the CS line, the first control terminal being supplied an input signal so that a conductivity between the first and second terminals is controlled; a photo-sensor having a first terminal which is connected to the control terminal of the TFT; and a holding capacitance, connected in parallel to the photo-sensor, having a terminal on an opposite side of the control terminal, to which a holding voltage is supplied, and in the input device, a voltage of the CS line is outputted as a detection signal to the sense line via the TFT.Type: GrantFiled: October 15, 2002Date of Patent: January 2, 2007Assignee: Sharp Kabushiki KaishaInventor: Mutsumi Nakajima
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Publication number: 20060262264Abstract: A liquid crystal display device includes a first substrate; a second substrate; and a liquid crystal layer interposed between the first substrate and the second substrate and having liquid crystal molecules therein. The first substrate includes a first electrode facing the liquid crystal layer. The second substrate includes a second electrode facing the liquid crystal layer. The first electrode, the second electrode, and a region of the liquid crystal layer supplied with a voltage by the first electrode and the second electrode define a pixel region which is a unit for display. The pixel region includes a plurality of sub pixel regions, in each of which the liquid crystal molecules are aligned in an axial symmetrical manner. At least one of the first electrode and the second electrode includes a plurality of openings, which are regularly arranged, in the pixel region.Type: ApplicationFiled: June 19, 2006Publication date: November 23, 2006Applicant: Sharp Kabushiki KaishaInventors: Koichi Miyachi, Makoto Shiomi, Nobukazu Nagai, Mutsumi Nakajima
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Patent number: 7084947Abstract: A liquid crystal display device includes a first substrate; a second substrate; and a liquid crystal layer interposed between the first substrate and the second substrate and having liquid crystal molecules therein. The first substrate includes a first electrode facing the liquid crystal layer. The second substrate includes a second electrode facing the liquid crystal layer. The first electrode, the second electrode, and a region of the liquid crystal layer supplied with a voltage by the first electrode and the second electrode define a pixel region which is a unit for display. The pixel region includes a plurality of sub pixel regions, in each of which the liquid crystal molecules are aligned in an axial symmetrical manner. At least one of the first electrode and the second electrode includes a plurality of openings, which are regularly arranged, in the pixel region.Type: GrantFiled: November 10, 2003Date of Patent: August 1, 2006Assignee: Sharp Kabushiki KaishaInventors: Koichi Miyachi, Makoto Shiomi, Nobukazu Nagae, Mutsumi Nakajima
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Patent number: 6958787Abstract: A liquid crystal display apparatus has a plurality of TFTs and pixel electrodes disposed in a matrix form in regions surrounded with scanning lines and signal lines disposed on a glass substrate. The display apparatus also has an auxiliary capacitor electrode formed almost all over a display screen in such a way that the auxiliary capacitor electrode is opposed to the pixel electrodes with interposition of an insulation film therebetween. A slit is formed in the auxiliary capacitor electrode in a region corresponding to a gap between the adjacent pixel electrodes. Each pixel electrode may overlap the scanning lines and/or the signal lines. The width of the slit of the auxiliary capacitor electrode may be larger than the width of the gap between the adjacent pixel electrodes.Type: GrantFiled: November 27, 2001Date of Patent: October 25, 2005Assignee: Sharp Kabushiki KaishaInventor: Mutsumi Nakajima
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Publication number: 20050174500Abstract: A display device includes a source line for supplying a display signal, a display pixel electrode, and a TFT for switching an electrical connection between the source line and the pixel electrode. The TFT includes a source electrode electrically connected to the source line, a drain electrode electrically connected to the pixel electrode, and a gate electrode for controlling an electrical connection between the source electrode and the drain electrode. A first auxiliary capacitor electrode and a second auxiliary capacitor electrode are connected to the drain electrode and respective connection portions between the drain electrode and the auxiliary capacitor electrodes are formed of a semiconductor material.Type: ApplicationFiled: February 3, 2005Publication date: August 11, 2005Inventors: Ichiro Shiraki, Mutsumi Nakajima, Keisuke Yoshida, Shoichi Andou, Masayuki Inoue, Hirofumi Katsuse, Junichi Yamada
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Publication number: 20050173707Abstract: A display device of the present invention comprises: a source line; a pixel electrode; a first TFT for switching an electrical connection between the source line and the pixel electrode; and a second TFT as a spare. The second TFT includes a semiconductor film and a gate electrode. The semiconductor film includes a source electrode and a drain electrode. The gate electrode is provided on the semiconductor film with a gate insulation film interposed therebetween. The display device includes an interlayer insulation film between the source line and the semiconductor film of the second TFT. The interlayer insulation film is thicker than the gate insulation film. When the first TFT is unusable, a contact hole is formed in the interlayer insulation film such that the source line is electrically connected to the source electrode, whereby the electrical connection between the source line and the pixel electrode is rendered switchable by the second TFT.Type: ApplicationFiled: February 3, 2005Publication date: August 11, 2005Inventors: Ichiro Shiraki, Mutsumi Nakajima, Keisuke Yoshida, Shoichi Andou, Masayuki Inoue
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Publication number: 20050168665Abstract: A shield electrode is provided in the vicinity of a pixel electrode and source bus lines. The shield electrode may be provided in the same layer as gate bus lines, or in the same layer as the source bus lines. The shield electrode may be surrounded by an insulating material, or may be connected to a line other than the source bus lines. By providing the shield electrode, it is possible to reduce a source-drain parasitic capacitance between a pixel electrode and a source bus line.Type: ApplicationFiled: January 26, 2005Publication date: August 4, 2005Applicant: SHARP KABUSHIKI KAISHAInventors: Keiichi Ina, Ichiro Shiraki, Mutsumi Nakajima, Keisuke Yoshida, Shoichi Andou
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Publication number: 20050168678Abstract: A display device includes: a plurality of signal lines which extend in a zigzag manner in a column direction and to which image signals are supplied, respectively; an insulation film which covers the plurality of signal lines; and a plurality of pixel electrodes which are formed on the insulation film and to which the image signals are input from the plurality of signal lines, respectively. A distance between ones of the pixel electrodes located adjacent to each other in the column direction is equal to or larger than a line width of the signal lines.Type: ApplicationFiled: February 2, 2005Publication date: August 4, 2005Applicant: SHARP KABUSHIKI KAISHAInventors: Shoichi Andou, Mutsumi Nakajima, Ichiro Shiraki, Keisuke Yoshida, Keiichi Ina