Patents by Inventor Mikio Katayama

Mikio Katayama 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).

  • Patent number: 5335102
    Abstract: An active matrix display device comprising: scanning branch lines each branching from the scanning line; and switching elements each formed on an end portion of the scanning branch line, wherein the distance between the scanning line side of the switching element and the scanning line is so provided as to enable the scanning branch line to be cut off by irradiation with light energy. Alternatively, an active matrix display device comprising: a conductive layer disposed under the signal line and the pixel electrode with an insulating film interposed therebetween; and a conductive piece formed between the pixel electrode and the insulating film.
    Type: Grant
    Filed: February 19, 1991
    Date of Patent: August 2, 1994
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yuzuru Kanemori, Mikio Katayama, Kiyoshi Nakazawa, Hiroaki Kato, Kozo Yano, Naofumi Kondo, Hiroshi Fujiki, Toshiaki Fujihara, Hidenori Negoto, Manabu Takahama
  • Patent number: 5302987
    Abstract: An active matrix substrate has an insulating substrate, a plurality of signal lines and a plurality of scanning lines arranged in a matrix on the insulating substrate and defining a matrix of areas, each area including a pixel electrode and a switching device. The switching device has a connecting electrode for connecting the switching device to the pixel electrode. The connecting electrode includes a rectangular main portion and an extended portion connected to the main portion, and the main portion has a side which is substantially identical in length to the width of the switching device. The main portion and the extended portion are disposed between the pixel electrode and the insulating substrate.
    Type: Grant
    Filed: April 28, 1992
    Date of Patent: April 12, 1994
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yuzuru Kanemori, Hiroshi Fujiki, Toshiaki Fujihara, Akihiko Imaya, Hiroaki Kato, Mikio Katayama, Takayoshi Nagayasu
  • Patent number: 5280279
    Abstract: A driving circuit which can drive an LCD apparatus without causing the residual image phenomenon is disclosed. The driving circuit has a polarity-inverting circuit for converting input video signals into polarity-alternating signals. The polarity-inverting circuit has input-output characteristics which are at least partially non-linear. The input-output characteristics are linear in the positive region, and non-linear in the negative region, or non-linear in the positive region, and linear in the negative region.
    Type: Grant
    Filed: December 19, 1990
    Date of Patent: January 18, 1994
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Kiyoshi Nakazawa, Naofumi Kondo, Mikio Katayama, Tsuneo Nakamura
  • Patent number: 5276540
    Abstract: An active matrix substrate which includes a plurality of pixel electrodes arranged in a matrix over an insulating substrate, with each of the pixel electrodes having a transparent conductive film including an additional capacitance portion and a non-additional capacitance portion. Additional capacitance electrodes are capacitively coupled to said additional capacitance portions through at least one insulating film. A conductive film electrically connects the additional capacitance portion to the non-additional capacitance portion of each of the pixel electrodes. The transparent conductive film of each of said pixel electrodes includes a portion for covering the conductive film, the portion for covering having a wider width than a width of the conductive film.
    Type: Grant
    Filed: November 29, 1991
    Date of Patent: January 4, 1994
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Masaya Okamoto, Mikio Katayama, Yuzuru Kanemori, Katsuhiro Kawai, Hiroshi Fujiki, Makoto Tachibana
  • Patent number: 5268678
    Abstract: A matrix-type display device includes a display electrode board that has a plurality of pixel electrodes arranged into a matrix. A set of scan lines extend in parallel in one direction and a set signal lines extend in an orthogonal direction so that these lines are arranged between adjacent pixel electrodes. A spare line intersects at least some of the scan lines and/or said signal lines at each end of said set of lines so as to sandwich an insulating film therebetween, and a lead-out line is connected to one end of the spare line. The lead-out lines are connected to external connecting lines, which are outside of the display electrode board, so that the lead-out lines can be connected to each other through said connecting lines. Line breakdowns can be corrected and the correction of the breakdowns entails little or no increase in load capacity, electrical resistance, and noise with respect to the corrected line.
    Type: Grant
    Filed: June 20, 1990
    Date of Patent: December 7, 1993
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Kiyoshi Nakazawa, Mikio Katayama, Hiroaki Kato, Yuzuru Kanemori, Takayoshi Nagayasu, Hidenori Negoto
  • Patent number: 5212574
    Abstract: An active matrix board comprises pixel electrodes (9) that are disposed in a matrix fashion on an insulating substrate (1), scan lines (23) which are disposed in a parallel manner between the individual pixel electrodes (9), addition capacity lines (31), and signal lines (11) which intersect the scan lines (23) and the addition capacity lines (31). Each scan line (23) comprises a lower scan line (2) which is discontinuously disposed and an anodizable upper scan line (3) that covers the lower scan line (2) and is continuously disposed. Similarly, each addition capacity line (31) comprises a lower line (29) which is discontinuously disposed and an anodizable upper line (30) that covers the lower line (29) and is continuously disposed. Should a segment of a lower line (2, 29) be eroded during etching, the discontinuous disposition of other segments of the lower line (2, 29) precludes the other segments from being subject to erosion.
    Type: Grant
    Filed: September 17, 1992
    Date of Patent: May 18, 1993
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Mikio Katayama, Hidenori Negoto, Hiroaki Kato, Akihiko Imaya, Yuzuru Kanemori, Kiyoshi Nakazawa
  • Patent number: 5191322
    Abstract: An active-matrix display device comprising a plurality of picture elements that are arranged into a matrix and thin-film transistors that switch the picture elements, wherein an MIS-structured diode and each of the picture elements are connected with each of the thin-film transistors in parallel.
    Type: Grant
    Filed: June 7, 1989
    Date of Patent: March 2, 1993
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Mikio Katayama, Masahiro Adachi, Hirohisa Tanaka, Hiroshi Morimoto
  • Patent number: 5191451
    Abstract: An active matrix display device which includes a pair of insulated substrates, pixel electrodes arranged in matrix on an inner side of one of the pair of insulated substrates, each pixel electrode being provided with at least a pair of TFTs including gate electrodes and drain electrodes, wherein the gate electrodes are formed in symmetrical shapes with respect to a central plane passing through a center between the pair of TFTs, thereby ensuring that the parasitic capacitance of the TFTs remain constant irrespective of a possible displacement of the drain electrodes and keeping the display device free from flickers due to differentiated parasitic capacitances.
    Type: Grant
    Filed: April 16, 1991
    Date of Patent: March 2, 1993
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Mikio Katayama, Naofumi Kondo, Yuzuru Kanemori, Toshiaki Fujihara, Hiroshi Fujiki, Kiyoshi Nakazawa
  • Patent number: 5164851
    Abstract: An active matrix device has pixel electrodes (40), each of which is divided into a plurality of divisional pixel electrodes (41, 42). Each divisional pixel electrode (41, 42) has a corresponding switching element (31, 32). A junction bridges adjacent ones of the divisional pixel electrodes (41, 42), and at least one spare switching element (34) is disposed in proximity to the junction. The junction has a pair of metal pieces (44, 45) electrically connected to the respective pixel electrodes (41, 42), an output terminal (74) of the spare switching element (34), and a joint metal layer (46) on which both of the metal pieces (44, 45) and the output terminal (74) of the spare switching element (34) are superposed with an insulating film (54) placed therebetween.
    Type: Grant
    Filed: January 31, 1991
    Date of Patent: November 17, 1992
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yuzuru Kanemori, Mikio Katayama, Hiroaki Kato, Kiyoshi Nakazawa
  • Patent number: 5151807
    Abstract: An active matrix substrate comprising picture element electrodes disposed in a matrix on a substrate, each of which is composed of divided electrodes, and an electrically conductive film on which two of said divided electrodes adjacent to each other are superposed in a manner to sandwich an insulating film therebetween so as to form a connection. The connection is irradiated with laser beams from the outside of the display apparatus when one of the divided electrodes brings about a picture element defect, so that both the divided electrodes can be electrically connected to each other, thereby attaining a correction of the picture element defect. A display apparatus using the active matrix substrate is also provided.
    Type: Grant
    Filed: January 30, 1990
    Date of Patent: September 29, 1992
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Mikio Katayama, Hiroaki Kato, Takayoshi Nagayasu, Akihiko Imaya, Hidenori Negoto, Yuzuru Kanemori, Toshihiko Hirobe
  • Patent number: 5102361
    Abstract: A method for manufacturing an active matrix display apparatus comprising: forming picture element electrodes disposed in a matrix at the inner surface of either one of a pair of substrates, switching elements electrically connected to the picture element electrodes respectively, spare switching elements disposed close to the picture element electrodes in a non-conductive state respectively, and connections, each including an extension end of each of the spare switching elements and a metal piece electrically connected to one end of each of the picture element electrodes, the extension end and metal piece being disposed opposite to each other in a non-conductive state; applying a drive signal to a display medium via the picture element electrodes and opposite electrodes thereby detecting a defect in the switching element; and irradiating energy onto the connection between the picture element electrode connected to the switching element, the defect of which has been detected, and the spare switching element, th
    Type: Grant
    Filed: January 19, 1990
    Date of Patent: April 7, 1992
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Mikio Katayama, Hiroaki Kato, Takayoshi Nagayasu, Akihiko Imaya, Hidenori Negoto, Yuzuru Kanemori, Kiyoshi Nakazawa
  • Patent number: 5076666
    Abstract: An active matrix display apparatus comprising a pair of substrates, at least one of which is translucent, a display medium charged between the substrates and modulated of its optical characteristics in response to applied voltage, picture element electrodes disposed in a matrix at the inner surface of either one of the pair of substrates, switching elements electrically connected to the picture element electrodes respectively, and spare switching elements disposed close to the picture element electrodes in a non-conductive state respectively, the extension end of the spare switching element and one end of the picture element electrode are disposed on a metal piece so as to sandwich an insulating layer therebetween, whereby a picture element defect caused by a malfunction of switching elements can be readily corrected.
    Type: Grant
    Filed: December 1, 1989
    Date of Patent: December 31, 1991
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Mikio Katayama, Hiroaki Kato, Kiyoshi Nakazawa, Hidenori Negoto, Yuzuru Kanemori, Motokazu Inui, Akihiko Imaya, Takayoshi Nagayasu
  • Patent number: 5075674
    Abstract: An active matrix substrate for the liquid crystal display has a switching circuit for switching on each of picture elements which includes a corresponding gate bus line, source bus line and a switching transistor. Further, the switching circuit includes at least one redundant structure to avoid inoperativeness of the switching circuit.
    Type: Grant
    Filed: November 18, 1988
    Date of Patent: December 24, 1991
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Mikio Katayama, Hirohisa Tanaka, Yasunori Shimada, Hiroshi Morimoto
  • Patent number: 5045753
    Abstract: A matrix display apparatus with a layered structure in which driving wires are layered on repair wires to sandwhich an insulating film therebetween, whereby it is possible to carry out complete driving of the display apparatus so that the location of picture element defects can be identified.
    Type: Grant
    Filed: March 28, 1990
    Date of Patent: September 3, 1991
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Mikio Katayama, Hiroaki Kato, Kiyoshi Nakazawa, Hidenori Negoto, Yuzuru Kanemori, Motokazu Inui, Akihiko Imaya, Takayoshi Nagayasu
  • Patent number: 4665598
    Abstract: An eyeglass frame (10) consisting of outside and inside synthetic-resin members (20, 25), a metallic-plate core member (12) sandwiched in between the outside and inside members, the core member (12) being partly formed with a plurality of holes (16) which are filled up with colored resins (18). The outside member is composed of inner, colorless, transparent and outer, colored, opaque layers (21, 22) of which the outer layer is removed partly in the form of a window through which the colored resins (18) and the holes (16) appear as stained-glass patterns.
    Type: Grant
    Filed: March 10, 1986
    Date of Patent: May 19, 1987
    Assignee: Murai Optical Company, Ltd.
    Inventors: Masaru Murai, Hisashi Hujita, Mikio Katayama