Patents by Inventor Sadayoshi Hotta
Sadayoshi Hotta 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: 20100051922Abstract: An organic thin film transistor comprising: a substrate; a source electrode and a drain electrode defining a channel; a layer of insulating material disposed over the source and drain electrodes; a layer of organic semi-conductive material extending across the channel; a layer of dielectric material; and a gate electrode disposed over the layer of dielectric material.Type: ApplicationFiled: April 3, 2008Publication date: March 4, 2010Applicants: CAMBRIDGE DISPLAY TECHNOLOGY LIMITED, Panasonic CorporationInventors: Sadayoshi Hotta, Jeremy Henley Burroughes, Gregory Lewis Whiting
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Publication number: 20090101893Abstract: A method of forming an organic thin film transistor comprising source and drain electrodes with a channel region therebetween, a gate electrode, a dielectric layer disposed between the source and drain electrodes and the gate electrode, and an organic semiconductor disposed in at least the channel region between the source and drain electrodes, said method comprising: seeding a surface in the channel region with crystallization sites prior to deposition of the organic semiconductor; and depositing the organic semiconductor onto the seeded surface whereby the organic semiconductor crystallizes at the crystallization sites forming crystalline domains in the channel region.Type: ApplicationFiled: June 20, 2008Publication date: April 23, 2009Applicants: CAMBRIDGE DISPLAY TECHNOLOGY LIMITED, MATSUSHITA ELECTRIC INDUSTRIAL CO. LTD.Inventors: Jonathan J. Halls, Craig Murphy, Gregory Whiting, Sadayoshi Hotta
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Publication number: 20080290339Abstract: The present invention is directed to manufacturing an organic transistor with an organic semiconductor film formed by a coating method, without involving a process of forming a rib for forming the organic semiconductor film. To be more specific, the organic transistor of the present invention includes: (1) a source electrode part and a drain electrode part which are formed on a substrate; (2) rib selectively formed on part of the source electrode part and the drain electrode part; (3) an organic semiconductor film placed in the region defined by the ribs and connecting the source electrode part and the drain electrode part; and (4) a gate electrode formed on the organic semiconductor film through a gate insulating film. The organic transistor of the present invention is characterized in that there is a gap between the rib formed on the source electrode part and the rib formed on the drain electrode part.Type: ApplicationFiled: May 23, 2008Publication date: November 27, 2008Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.Inventors: Shuhei NAKATANI, Sadayoshi HOTTA, Hidehiro YOSHIDA
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Patent number: 6836306Abstract: A transflective liquid crystal display device having excellent display quality is provided which is capable of precisely controlling the alignment of liquid crystal molecules and of providing a high brightness display both in a transmissive display mode and in a reflective display mode. The transflective liquid crystal display panel has a pair of substrates, a liquid crystal layer sandwiched between the substrates, pixel electrodes disposed on the surface of one of the substrates facing the liquid crystal layer, a counter electrode disposed on the surface of the other substrate facing the liquid crystal layer, and an alignment film covering the surface of each of the substrates facing the liquid crystal layer. The pixel electrodes, each including an electrode for reflective display and an electrode for transmissive display, are disposed such that the distances to the other substrate from the electrode for reflective display and from the electrode for transmissive display are different.Type: GrantFiled: January 9, 2004Date of Patent: December 28, 2004Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Hirofumi Kubota, Naohide Wakita, Tsuyoshi Uemura, Sadayoshi Hotta
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Patent number: 6781659Abstract: A liquid crystal display device, wherein liquid crystal is driven by an electric field that is parallel to a substrate, includes a plurality of gate lines (Xm−1), (Xm) and a plurality of data lines (Yn−1), (Yn) provided such that the data lines intersect with the plurality of gate lines, switching elements (13) connected to the gates lines (Xm−1) and the data lines (Yn−1), pixel electrodes (11) connected to the data lines (Yn−1) via the switching elements (13), and opposing electrodes (12) forming pairs with the pixel electrodes (11), wherein a plurality of storage capacities (14a), (14b) for maintaining a charge of the pixel electrodes (11) are provided in a distributed arrangement associated with points where the plurality of gate lines (Xm−1), (Xm) and the plurality of data lines (Yn−1), (Yn) intersect.Type: GrantFiled: October 12, 2001Date of Patent: August 24, 2004Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Akinori Shiota, Hiroyuki Yamakita, Katsuhiko Kumagawa, Sadayoshi Hotta, Yoneharu Takubo
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Patent number: 6771334Abstract: A transflective liquid crystal display device having excellent display quality is provided which is capable of precisely controlling the alignment of liquid crystal molecules and of providing a high brightness display both in a transmissive display mode and in a reflective display mode. The transflective liquid crystal display panel has a pair of substrates, a liquid crystal layer sandwiched between the substrates, pixel electrodes disposed on the surface of one of the substrates facing the liquid crystal layer, a counter electrode disposed on the surface of the other substrate facing the liquid crystal layer, and an alignment film covering the surface of each of the substrates facing the liquid crystal layer. The pixel electrodes, each including an electrode for reflective display and an electrode for transmissive display, are disposed such that the distances to the other substrate from the electrode for reflective display and from the electrode for transmissive display are different.Type: GrantFiled: May 23, 2002Date of Patent: August 3, 2004Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Hirofumi Kubota, Naohide Wakita, Tsuyoshi Uemura, Sadayoshi Hotta
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Publication number: 20040145691Abstract: A transflective liquid crystal display device having excellent display quality is provided which is capable of precisely controlling the alignment of liquid crystal molecules and of providing a high brightness display both in a transmissive display mode and in a reflective display mode. The transflective liquid crystal display panel has a pair of substrates, a liquid crystal layer sandwiched between the substrates, pixel electrodes disposed on the surface of one of the substrates facing the liquid crystal layer, a counter electrode disposed on the surface of the other substrate facing the liquid crystal layer, and an alignment film covering the surface of each of the substrates facing the liquid crystal layer. The pixel electrodes, each including an electrode for reflective display and an electrode for transmissive display, are disposed such that the distances to the other substrate from the electrode for reflective display and from the electrode for transmissive display are different.Type: ApplicationFiled: January 9, 2004Publication date: July 29, 2004Applicant: Matsushita Elec. Ind. Co. Ltd.Inventors: Hirofumi Kubota, Naohide Wakita, Tsuyoshi Uemura, Sadayoshi Hotta
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Publication number: 20020171792Abstract: A transflective liquid crystal display device having excellent display quality is provided which is capable of precisely controlling the alignment of liquid crystal molecules and of providing a high brightness display both in a transmissive display mode and in a reflective display mode. The transflective liquid crystal display panel has a pair of substrates, a liquid crystal layer sandwiched between the substrates, pixel electrodes disposed on the surface of one of the substrates facing the liquid crystal layer, a counter electrode disposed on the surface of the other substrate facing the liquid crystal layer, and an alignment film covering the surface of each of the substrates facing the liquid crystal layer. The pixel electrodes, each including an electrode for reflective display and an electrode for transmissive display, are disposed such that the distances to the other substrate from the electrode for reflective display and from the electrode for transmissive display are different.Type: ApplicationFiled: May 23, 2002Publication date: November 21, 2002Inventors: Hirofumi Kubota, Naohide Wakita, Tsuyoshi Uemura, Sadayoshi Hotta
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Publication number: 20020154079Abstract: A liquid crystal display device, wherein liquid crystal is driven by an electric field that is parallel to a substrate, includes a plurality of gate lines (Xm−1), (Xm) and a plurality of data lines (Yn−1), (Yn) provided such that the data lines intersect with the plurality of gate lines, switching elements (13) connected to the gates lines (Xm−1) and the data lines (Yn−1), pixel electrodes (11) connected to the data lines (Yn−1) via the switching elements (13), and opposing electrodes (12) forming pairs with the pixel electrodes (11), wherein a plurality of storage capacities (14a), (14b) for maintaining a charge of the pixel electrodes (11) are provided in a distributed arrangement associated with points where the plurality of gate lines (Xm−1), (Xm) and the plurality of data lines (Yn−1), (Yn) intersect.Type: ApplicationFiled: October 12, 2001Publication date: October 24, 2002Inventors: Akinori Shiota, Hiroyuki Yamakita, Katsuhiko Kumagawa, Sadayoshi Hotta, Yoneharu Takubo
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Patent number: 5303072Abstract: An improved arrangement of a liquid crystal display device is provided in which the redundancy of a known but unwanted TFT (thin film transistor) defect is suppressed so that the yield per finished liquid crystal display device product can be increased without deterioration in the picture quality. Each pixel of the liquid crystal display device arranged at an intersection of one of scanning lines and one of signal lines is provided with two or three TFTs and also, a storage capacitor which is formed of a portion of a gate insulating layer and is sandwiched between its electrode and a preceding scanning line in the previous row using no extra masking procedure. The source, drain and gate electrodes of both the first and third TFTs are respectively coupled to the same signal line, the electrode of the same pixel and the adjacent scanning lines.Type: GrantFiled: June 26, 1991Date of Patent: April 12, 1994Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Mamoru Takeda, Sadayoshi Hotta, Ichiro Yamashita, Tatsuhiko Tamura, Yoneharu Takubo
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Patent number: 5193017Abstract: An active matrix liquid crystal display device employing a thin film transistor (TFT) system includes a semiconductor of each TFT which is smaller in width than a gate bus electrode and is arranged on the gate bus electrode, and a drain electrode of the TFT is formed as a reflective pixel electrode thereby providing a light diffusion effect.Type: GrantFiled: January 8, 1991Date of Patent: March 9, 1993Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Hiroshi Iwai, Yoneharu Takubo, Sadayoshi Hotta
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Patent number: 5185601Abstract: A liquid crystal display apparatus includes a transistor array substrate having formed thereon an array of pixel electrodes arranged in a matrix to form pixels, an array of switching thin film transistors arranged in a matrix for driving the pixels, respectively, gate bus lines arranged in rows for applying scanning signals to the switching thin film transistors, and source bus lines arranged in columns for applying display data signals to the switching thin film transistors. A counter substrate has formed thereon a common counter electrode confronting the pixel electrodes, and a liquid crystal layer is sandwiched between the transistor array substrate and the counter substrate. The transistor array substrate further has formed thereon a common electrode disposed below the pixel electrodes through an insulating layer for constituting auxiliary capacitors with the pixel electrodes.Type: GrantFiled: January 8, 1991Date of Patent: February 9, 1993Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Mamoru Takeda, Tatsuhiko Tamura, Sadayoshi Hotta
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Patent number: 5144462Abstract: In a liquid crystal projection color display apparatus having three liquid crystal display devices used for red, green and blue light, each liquid crystal display device has a liquid crystal display panel and a microlens array disposed on the light-source side or the light-source and screen sides of the liquid crystal display panel. The microlens array has a controllable refractive power which is controlled by applying an electrtical power thereto. An electrical voltage is applied between transparent electrodes formed on both surfaces of a microlens array so that the refractive power of the microlens array can be made a value adapted to suit the corresponding one of red, green and blue light.Type: GrantFiled: November 29, 1990Date of Patent: September 1, 1992Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Akira Otsuka, Shin-Ichiro Ishihara, Yoshito Miyatake, Sadayoshi Hotta
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Patent number: 5126863Abstract: In a liquid crystal projection display apparatus, light is emitted from a light source and is separated and directed to pixels of a liquid crystal display element and condensed at the center of each pixel with a first microlens array. The light which has passed through the liquid crystal display element is converted into approximately parallel rays with a second microlens array. The light which has passed through the second microlens array is projected onto a screen via a projection lens.Type: GrantFiled: October 23, 1990Date of Patent: June 30, 1992Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Akira Otsuka, Shin-Ichiro Ishihara, Yoshito Miyatake, Sadayoshi Hotta
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Patent number: 4989954Abstract: A projection type liquid crystal display device for transmitting three color light beams of RGB through three TN type liquid crystal panels and projecting the transmitted light beams optimizes the RGB transmission characteristics by changing the crossing angles of the polarization axes of a polarizer and an analyzer with respect to the orientation directions of the respective RGB TN cells in specified directions, and also a projection type liquid crystal display device for transmitting a light beam through a TN type liquid crystal panel and projecting the transmitted light beam effects temperature-compensation of the transmission characteristics of the liquid crystal panels by controlling the crossing angle of the polarization axes of a polarizer and an analyzer.Type: GrantFiled: October 6, 1988Date of Patent: February 5, 1991Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Kazuo Yokoyama, Junichi Asada, Hiroshi Watanabe, Shoichi Ishihara, Sadayoshi Hotta, Fumiko Yokotani, Yoshihiro Matsuo
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Patent number: 4823126Abstract: A display device includes; a first group of bus lines for transmitting a display signal; a second group of bus lines for transmitting a scan signal and a display unit formed at an intersecting point between the first bus line and the second bus line. The first group and the second group of bus lines are formed in a matrix. The display device further includes switching elements which are selectively opened or closed, the switching elements being provided between the bus lines in the first group or in the second group. Accordingly, even when one of the bus lines is broken, a signal can be supplied from the other bus line to the broken bus line through this switching element.Type: GrantFiled: August 28, 1987Date of Patent: April 18, 1989Assignee: Matsushita Electric Industrial Co. Ltd.Inventors: Seiichi Nagata, Sadayoshi Hotta, Etsuya Takeda, Yutaka Miyata
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Patent number: 4632514Abstract: In a color liquid crystal display apparatus of twisted nematic type, thicknesses of the liquid crystal layer is made different for different color picture elements, thereby optical rotatory dispersion which has been the cause of undesirable light transmittance at 0 voltage input is minimized, so that contrast, range of reproduced color, view angle dependency, etc. are improved, and a color liquid crystal display apparatus capable of displaying splendid picture quality is provided.Type: GrantFiled: January 29, 1985Date of Patent: December 30, 1986Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Tetsu Ogawa, Seiichi Nagata, Sadayoshi Hotta
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Patent number: 4369392Abstract: An oxide-coated cathode used for the electron tubes such as cathode ray tubes and camera tubes, comprising as the base a sintered product principally composed of an alkaline earth metal compound and a high-melting-point metal and having high heat conductivity and low specific resistance, said sintered product being either used singly or layered on a high-melting-point metal body containing a reducible element or elements as impurity, and an oxide cathode material coated on said base, and a method of producing such oxide-coated cathode.Type: GrantFiled: September 16, 1980Date of Patent: January 18, 1983Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Sadayoshi Hotta, Masanori Watanabe