Patents by Inventor Fumio Matsukawa

Fumio Matsukawa 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: 6356329
    Abstract: The present invention discloses a liquid crystal display apparatus including (1) a liquid crystal panel including an electrodes substrate provided with pixel electrodes and counter electrodes, a counter substrate which opposes the electrodes substrate, and a liquid crystal layer containing therein liquid crystal molecules which are driven by an electric field that is generated in a substantially parallel manner with respect to a surface of the electrodes substrate when voltage is applied on the pixel electrodes and counter electrodes; and (2) a driving circuit for supplying predetermined electric signals to the pixel electrodes and the counter electrodes, wherein inclining directions of liquid crystal molecules which are closest to the electrodes substrate and those of liquid crystal molecules which are closest to the counter substrate are identical, and aligning directions of liquid crystal molecules which are closest to the electrodes substrate and those of liquid crystal molecules which are closest to the
    Type: Grant
    Filed: January 27, 1999
    Date of Patent: March 12, 2002
    Assignees: Mitsubishi Denki Kabushiki Kaisha, Advanced Display Inc.
    Inventors: Akira Tamatani, Fumio Matsukawa, Akira Tsumura, Shin Tahata, Masaya Mizunuma, Yasuhiro Morii, Masayuki Fujii, Yasuo Fujita
  • Patent number: 6335779
    Abstract: A method of manufacturing an in-plane switching liquid crystal display apparatus which includes forming on a TFT array substrate, a plurality of scanning signal lines, a plurality of image signal lines each crossing the scanning signal lines, thin film transistors at each intersection of the scanning signal lines and image signal lines, liquid crystal driving electrodes opposing the liquid crystal driving electrodes, and common signal lines connected to the common electrodes. Further, the method includes opposing a counter substrate to the TFT array substrate, interposing a plurality of spacers in a gap between the TFT array substrate and the counter substrate, and interposing a sealing agent in the gap between the TFT array substrate and the counter substrate so as to adhere the TFT array substrate and the counter substrate at peripheral portions thereof.
    Type: Grant
    Filed: September 19, 2000
    Date of Patent: January 1, 2002
    Assignees: Mistubishi Denki Kaubshiki Kaisha, Advanced Display Inc.
    Inventors: Yasuhiro Morii, Fumio Matsukawa, Akira Tsumura, Shin Tahata, Masaya Mizunuma, Akira Tamatani, Masayuki Fujii, Yasuo Fujita
  • Patent number: 6215537
    Abstract: A liquid crystal display includes: a scattering-polarizer provided between a liquid crystal and a back light for transmitting a polarization component in one direction of light from back light, but scattering and reflecting a polarization component in a direction which is orthogonal thereto: and a scattered light reflector reflecting the reflected and scattered light toward scattering-polarizer along with the polarization component in above mentioned one direction. Thus, a liquid crystal display which is inexpensive and has high display quality with reduced power consumption is obtained.
    Type: Grant
    Filed: April 8, 1999
    Date of Patent: April 10, 2001
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Akira Tsumura, Fumio Matsukawa, Kyoichiro Oda, Shuji Iwata
  • Patent number: 6181399
    Abstract: A reflective type liquid crystal display, which permits brighter display than conventional devices, can be used in a dark place and has a simple structure, is provided. The reflective type liquid crystal display includes a polarizer provided in the front of liquid crystal, and a backside-scattering-polarizer provided in the backside of the liquid crystal to transmit a polarized light component in one direction and reflect with scattering a polarized light component orthogonal to that one direction opposite to the advancing direction of the light.
    Type: Grant
    Filed: January 26, 1999
    Date of Patent: January 30, 2001
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Yuzo Odoi, Akira Tsumura, Kyoichiro Oda, Fumio Matsukawa
  • Patent number: 6166795
    Abstract: A liquid crystal display apparatus of the present invention includes an array substrate, a counter substrate, and liquid crystal that is interposed and held by a space formed by maintaining the array substrate and the counter substrate at a specified interval in a parallel manner, the liquid crystal display apparatus being of in-plane switching in which voltage is impressed on a pair of electrodes disposed on the array substrate to generate an electric field substantially parallel with respect to the array substrate surface and in which liquid crystal is driven through in-plane switching of liquid crystal molecules, wherein the array substrate is formed with a conductive film layer on a surface opposite to the surface on which the pair of electrodes are disposed. Providing a liquid crystal display apparatus with no electric charged being stored on the substrate surface thereof and no afterimages appear.
    Type: Grant
    Filed: January 27, 1999
    Date of Patent: December 26, 2000
    Assignees: Mitsubishi Denki Kabushiki Kaisha, Advanced Display Inc.
    Inventors: Masayuki Fujii, Fumio Matsukawa, Akira Tsumura, Shin Tahata, Masaya Mizunuma, Akira Tamatani, Yasuhiro Morii, Yasuo Fujita
  • Patent number: 6141078
    Abstract: The liquid crystal display apparatus of present invention includes a TFT array substrate on which there are formed scanning signal lines, image signal lines, thin film transistors, liquid crystal driving electrodes, common electrodes and common signal lines, a counter substrate which opposes the TFT array substrate, primary spacers for maintaining a gap between both substrates constant, secondary spacers for maintaining a gap in peripheral portions of both substrates constant, a seal member which is interposed in the gap between both substrates together with the secondary spacers and which adhere peripheral portions of both substrates, and a liquid crystal layer, wherein the in-plane retardation of the display apparatus (.DELTA.n).multidot.(d.sub.max -d.sub.min) is not less than 0 nm and not more than 20 nm, whereby variations in colors occurring in liquid crystal display apparatuses of IPS type which are due to unevenness of liquid crystal layers can be eliminated.
    Type: Grant
    Filed: January 27, 1999
    Date of Patent: October 31, 2000
    Assignees: Mitsubishi Denki Kabushiki Kaisha, Advanced Display, Inc.
    Inventors: Yasuhiro Morii, Fumio Matsukawa, Akira Tsumura, Shin Tahata, Masaya Mizunuma, Akira Tamatani, Masayuki Fujii, Yasuo Fujita
  • Patent number: 5905553
    Abstract: A liquid crystal display composed of an array substrate; a color filter substrate; a liquid crystal material interposed therebetween; a plurality of parallely spaced gate bus lines; a plurality of parallely spaced source bus lines; a plurality of pixel electrodes; a plurality of colored layers; and a light shield portion; wherein at a central portion of the first pixel pattern, gravity center of first pixel portion provided at the central portion of the first pixel pattern corresponds to gravity center of second pixel portion provided at a central portion of the second pixel pattern; and wherein at an end portion of the first pixel pattern, with respect to each viewing angle to each pixel, each second distance between any two adjacent gravity centers of pixels provided in the second pixel pattern is reduced to be shorter by prescribed length than each corresponding first distance between any two adjacent gravity centers of pixels corresponding to gravity centers of pixels provided in the first pixel pattern,
    Type: Grant
    Filed: February 2, 1998
    Date of Patent: May 18, 1999
    Assignees: Mitsubishi Denki Kabushiki Kaisha, Advanced Display Inc.
    Inventors: Fumio Matsukawa, Akira Tsumura, Shin Tahata, Masaya Mizunuma, Akira Tamatani, Yasuhiro Morii, Masayuki Fujii, Yasuo Fujita
  • Patent number: 5846853
    Abstract: A circuit substrate connection method for assuring to connect the semiconductor parts or sub-circuit substrate to a main circuit substrate such as liquid crystal display panel by avoiding a short between the electrodes on the same substrate. In the present invention, photosensitive resin including conductive particulates is painted on the transparent circuit substrate, and a light is radiated from the bottom of the main circuit substrate. As the electrode of the circuit substrate shields the light, the conductive particulates are removed together with the photosensitive resin other than on the electrode by developing the main circuit substrate. Further, in the present invention, the photosensitivity resin is painted on the transparent main circuit substrate, the photosensitivity resin on the electrode on the main circuit substrate are removed, the conductive particulates are filled in the removed portion, and thus only the conductive particulates are arranged only on the electrodes.
    Type: Grant
    Filed: April 24, 1996
    Date of Patent: December 8, 1998
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Hideaki Otsuki, Toshio Kato, Yoko Gofuku, Fumio Matsukawa
  • Patent number: 4937570
    Abstract: A route guidance display device for an automotive vehicle capable of displaying route patterns with a three-dimensional effect to enhance the viewer's comprehension of the road route situation being encountered. The display device includes a plurality of intersecting display segments indicative of corresponding possible route configurations. A depth-enhancing segment is included in a portion indicating the straight-ahead route. An intersection name display section may be separately included to display the name and related information regarding an intersection laying ahead.
    Type: Grant
    Filed: February 26, 1988
    Date of Patent: June 26, 1990
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Fumio Matsukawa, Yoshisada Mizutani, Hirotsugu Arai
  • Patent number: 4579424
    Abstract: A liquid crystal display device for displaying numerals in segments and in color including N common electrode divisions having interdigital configurations and striped transparent colored wires of N colors formed on the common electrode divisions in conformity therewith, with each segment containing display color elements of N+1 colors or more. The striped transparent colored layers are successively arranged in repetitive patterns, and may consist of two or more colors. The pitch of the striped transparent colored wires should provide a viewing angle within 2 minutes.
    Type: Grant
    Filed: January 26, 1984
    Date of Patent: April 1, 1986
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Fumio Matsukawa, Hirotsugu Arai
  • Patent number: 4556876
    Abstract: According to the present invention, the driving timing for each segment in a segment type digital display unit can be controlled independently on the basis of either one or both of the lighting history of each segment stored in a memory section and a detected temperature from a temperature detector mounted near segments. Therefore, the discriminatability particularly at low temperatures can be improved with little influence of the temperature and lighting history of segments.
    Type: Grant
    Filed: September 15, 1982
    Date of Patent: December 3, 1985
    Assignees: Mitsubishi Jidosha Kogyo Kabushiki Kaisha, Mitsubishi Denki Kabushiki Kaisha
    Inventors: Osamu Shimizu, Hirofumi Goto, Fumio Matsukawa