Patents by Inventor Kenji Kitajima

Kenji Kitajima 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: 7787089
    Abstract: A first conductive layer in which a first electrode film is formed, a first protective layer on the first conductive layer, a first hole penetrating through the first protective layer to reach the first electrode film, a second conductive layer including a second electrode film which is disposed on the first protective layer and in contact with a portion of the first electrode film at the bottom of the first hole and the lower electrode, a second protective layer disposed on the second conductive layer and including the insulating film, a second hole disposed on the second protective layer and penetrating through the second protective layer to reach the second electrode film, and a third conductive layer including a third electrode film which is in contact with a portion of the second electrode film at the bottom of the second hole and the upper electrode.
    Type: Grant
    Filed: September 25, 2009
    Date of Patent: August 31, 2010
    Assignee: Hitachi Displays, Ltd.
    Inventors: Hiroaki Asuma, Kenji Kitajima, Takamitsu Kamada, Susumu Edo, Ryouhei Suzuki
  • Publication number: 20100079713
    Abstract: A first conductive layer in which a first electrode film is formed, a first protective layer on the first conductive layer, a first hole penetrating through the first protective layer to reach the first electrode film, a second conductive layer including a second electrode film which is disposed on the first protective layer and in contact with a portion of the first electrode film at the bottom of the first hole and the lower electrode, a second protective layer disposed on the second conductive layer and including the insulating film, a second hole disposed on the second protective layer and penetrating through the second protective layer to reach the second electrode film, and a third conductive layer including a third electrode film which is in contact with a portion of the second electrode film at the bottom of the second hole and the upper electrode.
    Type: Application
    Filed: September 25, 2009
    Publication date: April 1, 2010
    Inventors: Hiroaki Asuma, Kenji Kitajima, Takamitsu Kamada, Susumu Edo, Ryouhei Suzuki
  • Publication number: 20100053531
    Abstract: The TFT substrate includes a conductive region electrically conducted to the transparent conductive film and a terminal region, on a first side not covered with the counter substrate. The terminal region includes a ground terminal connected to the conductive region and an adjacent terminal which is adjacent to the ground terminal and supplies signals or power source to the peripheral circuit. The adjacent terminal is connected to the peripheral circuit through a first wiring installed along a third side of the TFT substrate toward a second side facing the first side. The first wiring is extended to a middle point of the third side and then connected to the peripheral circuit.
    Type: Application
    Filed: August 27, 2009
    Publication date: March 4, 2010
    Inventors: Takamitsu KAMADA, Hiroaki ASUMA, Susumu EDO, Kenji KITAJIMA
  • Publication number: 20090231325
    Abstract: In a display device having a video signal drive circuit disposed laterally adjacent to the screen, the frame area is reduced and the vertical line noise at the center of the screen is prevented from appearing. Driver lines are drawn to areas disposed above and below a display area from the video signal drive circuit. R, G, and B drain lines are branched from each of the driver lines via R, G, and B switches. The R, G, and B switches are driven by R, G, and B switching lines. In order for preventing the interference between the driver line for supplying the center area of the screen with the image signals and the B switching line, a shield line is disposed between the driver line and the B switching line.
    Type: Application
    Filed: November 20, 2008
    Publication date: September 17, 2009
    Inventors: Ryouhei Suzuki, Kenji Kitajima
  • Patent number: 6952246
    Abstract: A liquid crystal display device includes plural reflective electrodes supplied with a video signal, second light-blocking conductive films below the reflective electrodes with a first insulating layer therebetween, and a first light-blocking film below the second light-blocking conductive films so as to cover spacing between the second light-blocking conductive films. Each of the second light-blocking films is electrically connected to a corresponding one of the reflective electrodes, and is disposed to cover at least a portion of spacings between the corresponding one of the reflective electrodes and ones of the reflective electrodes adjacent thereto. A second insulating layer is interposed between the first and second light-blocking films, and its thickness is from 150 nm to 450 nm.
    Type: Grant
    Filed: July 16, 2004
    Date of Patent: October 4, 2005
    Assignees: Hitachi, Ltd., Hitachi Device Engineering Co., Ltd.
    Inventors: Katsumi Matsumoto, Iwao Takemoto, Hideki Nakagawa, Eiichiro Ito, Atsumu Iguchi, Kenji Kitajima, Masatoshi Furihata, Takeshi Ohashi, Shigeo Nakamura, Kouki Sakai
  • Publication number: 20040263711
    Abstract: A liquid crystal display device includes plural reflective electrodes supplied with a video signal, second light-blocking conductive films below the reflective electrodes with a first insulating layer therebetween, and a first light-blocking film below the second light-blocking conductive films so as to cover spacing between the second light-blocking conductive films. Each of the second light-blocking films is electrically connected to a corresponding one of the reflective electrodes, and is disposed to cover at least a portion of spacings between the corresponding one of the reflective electrodes and ones of the reflective electrodes adjacent thereto. A second insulating layer is interposed between the first and second light-blocking films, and its thickness is from 150 nm to 450 nm.
    Type: Application
    Filed: July 16, 2004
    Publication date: December 30, 2004
    Inventors: Katsumi Matsumoto, Iwao Takemoto, Hideki Nakagawa, Eiichiro Ito, Atsumu Iguchi, Kenji Kitajima, Masatoshi Furihata, Takeshi Ohashi, Shigeo Nakamura, Kouki Sakai
  • Patent number: 6784956
    Abstract: A liquid crystal display device includes a first substrate, a second substrate, a liquid crystal layer sandwiched between the first and second substrate, plural reflective electrodes arranged on a surface of the first substrate on a liquid crystal layer side thereof, each of the reflective electrodes being adapted to be supplied with a video signal; and plural light-blocking conductive films disposed below the reflective electrodes with an insulating layer interposed between the light-blocking films and the reflective electrodes. Each of the light-blocking films is electrically connected to a corresponding one of the reflective electrodes, and is disposed to cover at least a portion of spacings between the corresponding one of the reflective electrodes and ones of the reflective electrodes adjacent thereto.
    Type: Grant
    Filed: July 20, 2001
    Date of Patent: August 31, 2004
    Assignees: Hitachi, Ltd., Hitachi Device Engineering Co., Ltd.
    Inventors: Katsumi Matsumoto, Iwao Takemoto, Hideki Nakagawa, Eiichiro Ito, Atsumu Iguchi, Kenji Kitajima, Masatoshi Furihata, Takeshi Ohashi, Shigeo Nakamura, Kouki Sakai
  • Publication number: 20020008800
    Abstract: A liquid crystal display device includes a first substrate, a second substrate, a liquid crystal layer sandwiched between the first and second substrate, plural reflective electrodes arranged on a surface of the first substrate on a liquid crystal layer side thereof, each of the reflective electrodes being adapted to be supplied with a video signal; and plural light-blocking conductive films disposed below the reflective electrodes with an insulating layer interposed between the light-blocking films and the reflective electrodes. Each of the light-blocking films is electrically connected to a corresponding one of the reflective electrodes, and is disposed to cover at least a portion of spacings between the corresponding one of the reflective electrodes and ones of the reflective electrodes adjacent thereto.
    Type: Application
    Filed: July 20, 2001
    Publication date: January 24, 2002
    Inventors: Katsumi Matsumoto, Iwao Takemoto, Hideki Nakagawa, Eiichiro Ito, Atsumu Iguchi, Kenji Kitajima, Masatoshi Furihata, Takeshi Ohashi, Shigeo Nakamura, Kouki Sakai
  • Patent number: 5280511
    Abstract: Herein disclosed is an amplification circuit for realizing a substantially high sensitivity with a simple structure. The amplification circuit comprises: a first capacitor C1 for receiving a signal charge; a source-follower circuit for receiving a voltage of the first capacitor C1; an inversion amplification circuit including a source-earth type amplification MOSFET Q5 having its gate fed with the output signal of the source-follower circuit through a second capacitor C2; a feedback third capacitor C3 connected between the gate and drain of the amplification MOSFET Q5; and a switch element Q6 for feeding the gate of the amplification MOSFET Q5 with a predetermined bias voltage while the signal charge of the first capacitor C1 is being reset. The amplification MOSFET Q5 has its drain equipped as load means with a depletion type MOSFET Q4 having its gate and source connected, and the depletion type MOSFET Q4 has its source given the same potential as the substrate potential thereof.
    Type: Grant
    Filed: September 3, 1992
    Date of Patent: January 18, 1994
    Assignees: Hitachi, Ltd., Hitachi Device Engineering Co., Ltd.
    Inventors: Tatsuhisa Fujii, Iwao Takemoto, Atsushi Hasegawa, Kenji Kitajima, Tetsuro Izawa, Katsumi Matsumoto