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).

  • Publication number: 20010002857
    Abstract: The transmission type liquid crystal display device of this invention includes: gate lines; source lines; and switching elements each arranged near a crossing of each gate line and each source line, a gate electrode of each switching element being connected to the gate line, a source electrode of the switching element being connected to the source line, and a drain electrode of the switching element being connected to a pixel electrode for applying a voltage to a liquid crystal layer, wherein an interlayer insulating film formed of an organic film with high transparency is provided above the switching element, the gate line, and the source line, and wherein the pixel electrode formed of a transparent conductive film is provided on the interlayer insulating film.
    Type: Application
    Filed: January 11, 2001
    Publication date: June 7, 2001
    Inventors: Takayuki Shimada, Masaru Kajitani, Masaya Okamoto, Naofumi Kondo, Mikio Katayama, Yoshikazu Sakuhana, Akihiro Yamamoto, Yukinobu Nakata, Hirohiko Nishiki
  • Patent number: 6215538
    Abstract: A liquid crystal display device includes: a first substrate; a second substrate; a liquid crystal layer interposed between the first and second substrates; a plurality of pixel regions for providing a display; and a reflective region for providing a display by using reflected light, the reflective region being provided in each of the plurality of pixel regions, wherein the first substrate includes a reflective electrode region in the reflective region, the second substrate includes a color filter layer, the color filter layer having a color filter region and a non-color filter region in the reflective electrode region, and the color filter region and the non-color filter region are located such that an overlapping area of the reflective electrode region and the non-color filter region is not changed even when the first and second substrates are mis-aligned with respect to each other.
    Type: Grant
    Filed: January 25, 1999
    Date of Patent: April 10, 2001
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yozo Narutaki, Masumi Kubo, Shogo Fujioka, Takayuki Shimada, Mikio Katayama, Youji Yoshimura, Yutaka Ishii
  • Patent number: 6195140
    Abstract: A liquid crystal display device according to the present invention includes a first substrate, a second substrate, and a liquid crystal layer interposed between the first substrate and the second substrate. The first substrate includes: a plurality of gate lines; a plurality of source lines arranged to cross with the plurality of gate lines; a plurality of switching elements disposed in the vicinity of crossings of the plurality of gate lines and the plurality of source lines; and a plurality of pixel electrodes connected to the plurality of switching elements. The second substrate includes a counter electrode. A plurality of pixel regions are defined by the plurality of pixel electrodes, the counter electrode, and the liquid crystal layer interposed between the plurality of pixel electrodes and the counter electrode, and each of the plurality of pixel regions includes a reflection region and a transmission region.
    Type: Grant
    Filed: July 27, 1998
    Date of Patent: February 27, 2001
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Masumi Kubo, Yozo Narutaki, Atsushi Ban, Takayuki Shimada, Yoji Yoshimura, Mikio Katayama, Yutaka Ishii, Hirohiko Nishiki
  • Patent number: 6195138
    Abstract: The transmission type liquid crystal display device of this invention includes: gate lines; source lines; and switching elements each arranged near a crossing of each gate line and each source line, a gate electrode of each switching element being connected to the gate line, a source electrode of the switching element being connected to the source line, and a drain electrode of the switching element being connected to a pixel electrode for applying a voltage to a liquid crystal layer, wherein an interlayer insulating film formed of an organic film with high transparency is provided above the switching element, the gate line, and the source line, and wherein the pixel electrode formed of a transparent conductive film is provided on the interlayer insulating film.
    Type: Grant
    Filed: June 12, 2000
    Date of Patent: February 27, 2001
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Takayuki Shimada, Masaru Kajitani, Masaya Okamoto, Naofumi Kondo, Mikio Katayama, Yoshikazu Sakuhana, Akihiro Yamamoto, Yukinobu Nakata, Hirohiko Nishiki
  • Patent number: 6188458
    Abstract: The transmission type liquid crystal display device of this invention includes: gate lines; source lines; and switching elements each arranged near a crossing of each gate line and each source line, a gate electrode of each switching element being connected to the gate line, a source electrode of the switching element being connected to the source line, and a drain electrode of the switching element being connected to a pixel electrode for applying a voltage to a liquid crystal layer, wherein an interlayer insulating film formed of a fluoric resin with high transparency is provided above the switching element, the gate line, and the source line, and wherein the pixel electrode formed of a transparent conductive film is provided on the interlayer insulating film.
    Type: Grant
    Filed: September 27, 1996
    Date of Patent: February 13, 2001
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yasunobu Tagusa, Takayuki Shimada, Mikio Katayama
  • Patent number: 6175393
    Abstract: Auxiliary lines are formed under pixel electrodes so as to be parallel to signal lines. The auxiliary lines are connected to the signal lines at one point for each pixel. This permits a voltage to be kept applying to a signal line even if a disconnection defect occurs in the signal line by making a circuit around a disconnected portion by the auxiliary line. Moreover, if a leakage defect occurs at a crossing point between the scanning line and the signal line, the signal line would be cut off on both sides of the scanning line. This also permits a voltage to be kept applying to the signal line by the auxiliary line. By setting the auxiliary lines narrower than the signal line, a reduction in aperture ratio can be suppressed, and by adopting the auxiliary lines made of a transparent electrically conductive material such as ITO, etc., it is possible to prevent the reduction in aperture ratio due to the auxiliary lines.
    Type: Grant
    Filed: August 20, 1996
    Date of Patent: January 16, 2001
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Atsushi Ban, Takayuki Shimada, Mikio Katayama
  • Patent number: 6172410
    Abstract: A collective substrate of active-matrix substrates is divided into a first block and a second block. In cells of the first block and the second block, from a corresponding signal input pad group, an inspection scanning signal is inputted via a scanning-line short ring connecting line to scanning lines, an inspection display signal is inputted via a signal-line short ring connecting line to signal lines, and an auxiliary capacity wire signal is inputted via an auxiliary capacity wire main wire connecting line to auxiliary capacity wires. This arrangement makes it possible to perform an electrical inspection with high accuracy and efficiency on a large-format active-matrix substrate, and to manufacture an inspection probe frame in a simple manner at low cost.
    Type: Grant
    Filed: July 6, 1999
    Date of Patent: January 9, 2001
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Hisashi Nagata, Mikio Katayama, Toshihiro Yamashita, Manabu Takahama
  • Patent number: 6133157
    Abstract: In a method for selectively etching a second silicon layer of a multilayer structure which includes a first silicon layer and the second silicon layer formed on the first silicon layer and doped with impurities according to the present invention, the second silicon layer is selectively etched by using an etching gas including freon-14 gas and a gas selected from a group composed of hydrogen chloride gas and chloride gas.
    Type: Grant
    Filed: July 21, 1998
    Date of Patent: October 17, 2000
    Assignee: Sharp Kabushike Kaisha
    Inventors: Takehisa Sakurai, Hitoshi Ujimasa, Katsuhiro Kawai, Atsushi Ban, Masaru Kajitani, Mikio Katayama
  • Patent number: 6128060
    Abstract: A liquid crystal display device includes a first plate and a second plate; a liquid crystal layer interposed between the first plate and the second plate; a switching element provided between the first plate and the liquid crystal layer; an interlayer insulating layer provided between the first plate and the liquid crystal layer; a pixel electrode provided on the interlayer insulating layer; a counter electrode provided between the second plate and the liquid crystal layer; and a gate signal line and a source signal line both connected to the switching element. The interlayer insulating layer has a first opening and a second opening. The pixel electrode is electrically connected to the switching element through the first opening. The second opening is positioned above the switching element.
    Type: Grant
    Filed: May 26, 1998
    Date of Patent: October 3, 2000
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yoshinori Shimada, Takayuki Shimada, Mikio Katayama
  • Patent number: 6097452
    Abstract: The transmission type liquid crystal display device of this invention includes: gate lines; source lines; and switching elements each arranged near a crossing of each gate line and each source line, a gate electrode of each switching element being connected to the gate line, a source electrode of the switching element being connected to the source line, and a drain electrode of the switching element being connected to a pixel electrode for applying a voltage to a liquid crystal layer, wherein an interlayer insulating film formed of an organic film with high transparency is provided above the switching element, the gate line, and the source line, and wherein the pixel electrode formed of a transparent conductive film is provided on the interlayer insulating film.
    Type: Grant
    Filed: July 6, 1998
    Date of Patent: August 1, 2000
    Assignee: Sharp Kabushiki Kaishi
    Inventors: Takayuki Shimada, Masaru Kajitani, Masaya Okamoto, Naofumi Kondo, Mikio Katayama, Yoshikazu Sakuhana, Akihiro Yamamoto, Yukinobu Nakata, Hirohiko Nishiki, Yoshinori Shimada
  • Patent number: 6072559
    Abstract: The active matrix display device of this invention includes: a substrate and a scanning line running in a first direction formed in a first layer located above the substrate. The display device also includes a signal line running in a second direction formed in a second layer located above the substrate; a switching element connected with the scanning line and the signal line; an insulating film formed above the scanning line, the signal line, and the switching element; and a pixel electrode formed above the insulating film so as to connect with the switching element, wherein the active matrix display device further comprises an extension line connected with an electrode of the switching element, the extension line being formed in the second layer so as not to intersect the signal line.
    Type: Grant
    Filed: March 6, 1997
    Date of Patent: June 6, 2000
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yuzuru Kanemori, Atsushi Ban, Mikio Katayama
  • Patent number: 6052162
    Abstract: The transmission type liquid crystal display device of this invention includes: gate lines; source lines; and switching elements each arranged near a crossing of each gate line and each source line, a gate electrode of each switching element being connected to the gate line, a source electrode of the switching element being connected to the source line, and a drain electrode of the switching element being connected to a pixel electrode for applying a voltage to a liquid crystal layer, wherein an interlayer insulating film formed of an organic film with high transparency is provided above the switching element, the gate line, and the source line, and wherein the pixel electrode formed of a transparent conductive film is provided on the interlayer insulating film.
    Type: Grant
    Filed: August 12, 1996
    Date of Patent: April 18, 2000
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Takayuki Shimada, Masaru Kajitani, Masaya Okamoto, Naofumi Kondo, Mikio Katayama, Yoshikazu Sakuhana, Akihiro Yamamoto, Yukinobu Nakata, Hirohiko Nishiki, Yoshinori Shimada
  • Patent number: 6042926
    Abstract: In a glass substrate and thin film combination, the glass substrate has a surface which is at least partially non-smooth, and the thin film is provided on the glass substrate in contact with the non-smooth part of the surface. Such a glass substrate and thin film combination is produced by forming a non-smooth part on at least a part of a surface of a glass substrate; and depositing a thin film on the glass substrate so as to be in contact with the non-smooth part.
    Type: Grant
    Filed: June 28, 1996
    Date of Patent: March 28, 2000
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Keiichi Tanaka, Yoshiharu Kataoka, Masaya Okamoto, Mikio Katayama
  • Patent number: 6034747
    Abstract: An active matrix substrate includes a gate line, a source line, and a thin film transistor provided in the vicinity of an intersection between the gate line and the source line. The thin film transistor includes a gate electrode connected to the gate line, a source electrode connected to the source line, and a drain electrode connected to a pixel electrode. An interlayer insulating film is provided over the thin film transistor, the gate line, and the source line. The pixel electrode is provided on the interlayer insulating film, and is connected to the drain electrode via a contact hole formed in the interlayer insulating film. A conductive layer extends over a channel region of the thin film transistor via the interlayer insulating film.
    Type: Grant
    Filed: September 25, 1996
    Date of Patent: March 7, 2000
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Shinya Tanaka, Atsushi Ban, Takayuki Shimada, Mikio Katayama
  • Patent number: 6025892
    Abstract: An active matrix substrate of the present invention includes: a substrate; a plurality of first lines formed on the substrate to be parallel to each other; an insulating film covering the first lines; a plurality of second lines formed on the substrate extending to cross the first lines with the insulating film interposed therebetween; a plurality of switching elements provided near respective crossings of the first lines and the second lines; and a plurality of pixel electrodes which are arranged in a matrix on the insulating film and which are connected to the switching elements, respectively. The insulating film is partially removed prior to forming the second lines and the pixel electrodes so that the removed portions of the insulating film correspond to the gaps.
    Type: Grant
    Filed: April 17, 1997
    Date of Patent: February 15, 2000
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Katsuhiro Kawai, Shinya Yamakawa, Masaya Okamoto, Mikio Katayama
  • Patent number: 5995177
    Abstract: An active matrix substrate includes an insulative plate; a plurality of switching elements arranged in a matrix on the insulative plate; a plurality of gate signal lines for controlling the switching elements; a plurality of source signal lines for providing data signals to the switching elements, the source signal lines being perpendicular to the gate signal lines; and a plurality of pixel electrodes respectively provided above and in electric connection with drain electrodes of the switching elements. At least one of the source signal lines and the drain electrodes include at least a transparent conductive layer, a first metal layer and a second metal layer.
    Type: Grant
    Filed: June 11, 1998
    Date of Patent: November 30, 1999
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Takashi Fujikawa, Yoshinori Shimada, Yoshiharu Kataoka, Yoshikazu Sakuhana, Mikio Katayama
  • Patent number: 5995178
    Abstract: The active matrix liquid crystal panel of this invention includes: a plurality of scanning lines and a plurality of signal lines arranged to cross each other; a plurality of pixel electrodes arranged in respective regions defined by the plurality of scanning lines and the plurality of signal lines; and a plurality of switching elements for driving the plurality of pixel electrodes, wherein each of the plurality of pixel electrodes overlaps at least one of the adjacent scanning lines and signal lines among the plurality of scanning lines and signal lines via an insulating film, and at least one of the plurality of pixel electrodes is electrically connected with the overlapped line.
    Type: Grant
    Filed: October 16, 1996
    Date of Patent: November 30, 1999
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Takashi Fujikawa, Yoshiharu Kataoka, Masaya Okamoto, Mikio Katayama, Katsumi Irie, Yuzuru Kanemori, Akihiro Yamamoto
  • Patent number: 5986738
    Abstract: The transmission type liquid crystal display device of this invention includes: gate lines; source lines; and switching elements each arranged near a crossing of each gate line and each source line, a gate electrode of each switching element being connected to the gate line, a source electrode of the switching element being connected to the source line, and a drain electrode of the switching element being connected to a pixel electrode for applying a voltage to a liquid crystal layer, wherein an interlayer insulating film formed of an organic film with high transparency and having a plurality of microscopic hollows formed in each pixel is provided above the switching element, the gate line, and the source line, and wherein the pixel electrode formed of a transparent conductive film is provided on the interlayer insulating film.
    Type: Grant
    Filed: May 14, 1999
    Date of Patent: November 16, 1999
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yasunobu Tagusa, Takayuki Shimada, Yuzuru Kanemori, Masaya Okamoto, Mikio Katayama
  • Patent number: 5953084
    Abstract: The transmission type liquid crystal display device of this invention includes: gate lines; source lines; and switching elements each arranged near a crossing of each gate line and each source line, a gate electrode of each switching element being connected to the gate line, a source electrode of the switching element being connected to the source line, and a drain electrode of the switching element being connected to a pixel electrode for applying a voltage to a liquid crystal layer, wherein an interlayer insulating film formed of an organic film with high transparency is provided above the switching element, the gate line, and the source line, and wherein the pixel electrode formed of a transparent conductive film is provided on the interlayer insulating film.
    Type: Grant
    Filed: July 6, 1998
    Date of Patent: September 14, 1999
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Takayuki Shimada, Masaru Kajitani, Masaya Okamoto, Naofumi Kondo, Mikio Katayama, Yoshikazu Sakuhana, Akihiro Yamamoto, Yukinobu Nakata, Hirohiko Nishiki, Yoshinori Shimada
  • Patent number: 5946065
    Abstract: The transmission type liquid crystal display device of this invention includes: gate lines; source lines; and switching elements each arranged near a crossing of each gate line and each source line, a gate electrode of each switching element being connected to the gate line, a source electrode of the switching element being connected to the source line, and a drain electrode of the switching element being connected to a pixel electrode for applying a voltage to a liquid crystal layer, wherein an interlayer insulating film formed of an organic film with high transparency and having a plurality of microscopic hollows formed in each pixel is provided above the switching element, the gate line, and the source line, and wherein the pixel electrode formed of a transparent conductive film is provided on the interlayer insulating film.
    Type: Grant
    Filed: October 31, 1996
    Date of Patent: August 31, 1999
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yasunobu Tagusa, Takayuki Shimada, Yuzuru Kanemori, Masaya Okamoto, Mikio Katayama