Patents by Inventor Hajime Imai

Hajime Imai 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: 20110012880
    Abstract: In at least one embodiment, a TFT includes: a first capacitor formed of a first capacitor electrode connected to a source electrode and a second capacitor electrode; a second capacitor formed of a third capacitor electrode and a fourth capacitor electrode; a first lead-out line; a second lead-out line connected to a gate electrode; a third lead-out line; a fourth lead-out line; a first interconnection; and a second interconnection. This realizes a TFT which can be easily saved from being a defective product even if leakage occurs in a capacitor connected to a TFT body section.
    Type: Application
    Filed: January 27, 2009
    Publication date: January 20, 2011
    Inventors: Shinya Tanaka, Tetsuo Kikuchi, Hajime Imai, Hideki Kitagawa, Yoshiharu Kataoka
  • Publication number: 20110007049
    Abstract: A TFT includes, in at least one embodiment, a capacitor formed: so as to have a region where a first capacitor electrode connected to a source electrode and a second capacitor electrode connected to a gate electrode are arranged to be stacked in a thickness direction and mutually opposed across a first dielectric layer therebetween; and so as to have a region where the first capacitor electrode and a third capacitor electrode connected to the gate electrode are arranged to be stacked in the thickness direction and mutually opposed across a second dielectric layer therebetween with a coupling between the first capacitor electrode and the third capacitor electrode and a coupling between the first capacitor electrode and the second capacitor electrode formed over mutually opposite faces of the first capacitor electrode. This realizes a TFT which can save a footprint of a capacitor connected to a TFT body section.
    Type: Application
    Filed: January 30, 2009
    Publication date: January 13, 2011
    Inventors: Tetsuo Kikuchi, Shinya Tanaka, Hajime Imai, Hideki Kitagawa, Chikao Yamasaki, Yoshiharu Kataoka
  • Publication number: 20110001736
    Abstract: A distance (d1) from an edge of a first region (R) at places (D) where branch electrodes (4b) extending, which branch off from an electrode line (4a) of a second source/drain electrode (4), start to overlap with a first region (R) to the electrode line (4a) is 5 ?m or more. This realizes a TFT including a comb-shaped source/drain structure that enables easy repair of a source-drain leakage.
    Type: Application
    Filed: October 9, 2008
    Publication date: January 6, 2011
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Shinya Tanaka, Tetsuo Kikuchi, Hajime Imai, Hideki Kitagawa, Yoshiharu Kataoka
  • Publication number: 20110001732
    Abstract: In at least one embodiment, each of stages connected in cascade includes a first circuit which causes a predetermined section in a corresponding one of the stages to be connected to a low-potential power source, the first circuit being constituted by TFTs, a first type of clock signal being used as a signal which is transferred to an output terminal of each of the stages so as to be outputted as an output signal, a second type of clock signal being used as a signal which drives the first circuit. With the arrangement, it is possible to realize a shift register circuit that is capable of further suppressing a shift phenomenon of a threshold voltage in each of the TFTs.
    Type: Application
    Filed: October 22, 2008
    Publication date: January 6, 2011
    Inventors: Hideki Morii, Akihisa Iwamoto, Takayuki Mizunaga, Yuuki Ohta, Masahiro Hirokane, Shinya Tanaka, Hajime Imai, Tetsuo Kikuchi
  • Publication number: 20100321618
    Abstract: A transflective-type and a reflection-type liquid crystal display device having a high reflection efficiency and a high image quality are provided.
    Type: Application
    Filed: October 16, 2007
    Publication date: December 23, 2010
    Inventors: Mitsunori Imade, Hajime Imai, Hideki Kitagawa, Tetsuo Kikuchi, Yoshihito Hara, Junya Shimada
  • Publication number: 20100315578
    Abstract: A transflective-type and a reflection-type liquid crystal display device having a high reflection efficiency and a high image quality are provided. A liquid crystal display device of the present invention is a liquid crystal display device including a reflection region for reflecting incident light toward a display surface, wherein the reflection region includes a metal layer, an insulating layer formed on the metal layer, a semiconductor layer formed on the insulating layer, and a reflective layer formed on the semiconductor layer; a plurality of recesses are formed in at least one of the metal layer, the insulating layer and the semiconductor layer; a plurality of dents are formed in the reflective layer in the reflection region according to the plurality of recesses; and a shortest distance a between edge portions of at least two of the plurality of recesses is 4 ?m or less.
    Type: Application
    Filed: September 7, 2007
    Publication date: December 16, 2010
    Inventors: Yoshihito Hara, Tetsuo Kikuchi, Hideki Kitagawa, Hajime Imai, Mitsunori Imade, Junya Shimada
  • Publication number: 20100253658
    Abstract: The present invention provides a display device in which a frame region is reduced while preventing decrease in reliability and a method for manufacturing the same. The present invention is a display device comprising: a display panel including a first substrate, a second substrate, and a sealing member positioned between the first substrate and the second substrate, wherein the display panel includes at least a part of a circuit unit and a moisture blocking film in a region overlapping with the sealing member on the first substrate, and the moisture blocking film is provided in a region other than a display region and interposed between the circuit unit and the sealing member.
    Type: Application
    Filed: September 9, 2008
    Publication date: October 7, 2010
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Shinya Tanaka, Tetsuo Kikuchi, Hajime Imai, Yoshiharu Kataoka
  • Publication number: 20100182527
    Abstract: A reflection-type or transflective-type liquid crystal display device having a high image quality, which has an excellent efficiency of utility of reflected light, is provided at low cost. A liquid crystal display device according to the present invention is a liquid crystal display device having a plurality of pixels, and including, in each of the plurality of pixels, a reflection section for reflecting incident light toward a display surface. The reflection section includes a metal layer having a plurality of apertures, and a reflective layer formed on the metal layer with an insulating layer interposed therebetween. A surface of the reflective layer includes a plurality of recesses or protrusions formed in accordance with a cross-sectional shape of the metal layer. Regarding distance between two adjoining apertures among the plurality of apertures of the metal layer, a shortest distance is no less than 0.3 ?m and no more than 3.0 ?m.
    Type: Application
    Filed: May 29, 2008
    Publication date: July 22, 2010
    Inventors: Tetsuo Kikuchi, Hideki Kitagawa, Hajime Imai, Yoshihito Hara, Mitsunori Imade, Junya Shimada
  • Publication number: 20100118238
    Abstract: Reflection-type and transflective-type liquid crystal display devices having a high image quality, in which moiré or coloration is reduced, are provided at low cost.
    Type: Application
    Filed: December 10, 2007
    Publication date: May 13, 2010
    Inventors: Junya Shimada, Hajime Imai, Tetsuo Kikuchi, Hideki Kitagawa, Mitsunori Imade, Yoshihito Hara
  • Publication number: 20100053517
    Abstract: Transflective-type and reflection type liquid crystal display devices having a high image quality are provided with a good production efficiency. A liquid crystal display device according to the present invention is a liquid crystal display device which includes; a first substrate and a second substrate between which liquid crystal is interposed; a first electrode and a second electrode formed on the first substrate for applying a voltage for controlling an orientation of the liquid crystal; a transistor having an electrode which is electrically connected to the first electrode; a metal layer being formed on the first substrate and including a protrusion, a recess, or an aperture; and a reflective layer formed above the metal layer on the first substrate for reflecting incident light toward a display surface. The metal layer is made of a same material as that of a gate electrode of the transistor.
    Type: Application
    Filed: December 27, 2007
    Publication date: March 4, 2010
    Inventors: Hajime Imai, Tetsuo Kikuchi, Hideki Kitagawa, Yoshihito Hara, Junya Shimada, Mitsunori Imade, Yoshiharu Kataoka
  • Publication number: 20100045917
    Abstract: A liquid crystal display device according to the present invention includes a vertical alignment type liquid crystal layer 32. Each pixel electrode thereof 12 has a plurality of unit electrode portions 12a, each of which has a conductive film and slits 13 that have been cut through the conductive film. When a predetermined voltage is applied between the pixel electrode and a counter electrode, a liquid crystal domain is produced in association with each unit electrode portion and liquid crystal molecules in the liquid crystal domain come to have a substantially radially tilting alignment state. As a result, the device of the present invention achieves a wide viewing angle and a fast response characteristic.
    Type: Application
    Filed: January 22, 2008
    Publication date: February 25, 2010
    Inventors: Hajime Imai, Tetsuo Kikuchi, Hideki Kitagawa, Yoshihito Hara, Junya Shimada, Mitsunori Imade
  • Publication number: 20100045885
    Abstract: A transflective-type liquid crystal display device with a high image quality which has a high aperture ratio and an excellent efficiency of utility of reflected light is provided at low cost. A liquid crystal display device according to the present invention is a liquid crystal display device having a transistor and a reflection section in each of a plurality of pixels; the reflection section includes a metal layer, an insulating layer formed on the metal layer, a semiconductor layer formed on the insulating layer, and a reflective layer formed on the semiconductor layer; a plurality of recesses are formed on the surface of the reflective layer; a storage capacitor is formed between at least a portion of the metal layer and at least a portion of the reflective layer; and at least one of the metal layer and the reflective layer includes two portions which are electrically isolated from each other.
    Type: Application
    Filed: December 6, 2007
    Publication date: February 25, 2010
    Inventors: Hajime Imai, Hitoshi Matsumoto
  • Publication number: 20100014031
    Abstract: Transflective-type and reflection-type liquid crystal display devices having a high image quality are provided at low cost. A liquid crystal display device according to the present invention is a liquid crystal display device having a reflection region for reflecting incident light toward a display surface, the reflection region including a Cs metal layer (metal layer), a gate insulating layer formed on the Cs metal layer, a semiconductor layer formed on the gate insulating layer, and a reflective layer formed on the semiconductor layer. On the surface of the reflective layer, a first recess and a second recess located inside the first recess are formed. The Cs metal layer and the semiconductor layer each have an aperture, and one of the first recess and the second recess is constituted by the aperture of the Cs metal layer, and the other is constituted by the aperture of the semiconductor layer.
    Type: Application
    Filed: October 25, 2007
    Publication date: January 21, 2010
    Inventors: Tetsuo Kikuchi, Hideki Kitagawa, Hajime Imai, Yoshihito Hara
  • Publication number: 20090195740
    Abstract: A liquid crystal display device, which can be a transflective-type or a reflection-type, includes a reflection section arranged to reflect incident light toward a display surface, wherein the reflection section includes a reflective layer provided on a substrate, and includes a first recess formed in a surface of the reflective layer and a second recess formed in the surface of the reflective layer in the first recess. The first recess corresponds to an aperture of a Cs metal layer, and the second recess corresponds to an aperture of a semiconductor layer. The transflective-type or reflection-type liquid crystal display device has a high image quality at low cost.
    Type: Application
    Filed: April 5, 2007
    Publication date: August 6, 2009
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Hajime Imai, Tetsuo Kikuchi, Hideki Kitagawa, Yoshihito Hara
  • Publication number: 20090195741
    Abstract: An objective of the present invention is to provide a transflective type liquid crystal display device and a reflection type liquid crystal display device having a high image quality at low cost. A liquid crystal display device according to the present invention is a liquid crystal display device having a reflection section for reflecting incident light toward a display surface. The reflection section includes an insulating layer; a semiconductor layer formed above the insulating layer; and a reflective layer formed above the semiconductor layer. On a surface of the reflective layer, a first recess and a second recess which is located inside the first recess are formed. The reflection section includes a first region and a second region which differ in a total thickness of a thickness of the insulating layer and a thickness of the semiconductor layer. The first recess and the second recess are formed in accordance with a cross-sectional shape of at least one of the insulating layer and the semiconductor layer.
    Type: Application
    Filed: June 8, 2007
    Publication date: August 6, 2009
    Inventors: Yoshihito Hara, Tetsuo Kikuchi, Hideki Kitagawa, Hajime Imai
  • Publication number: 20090185119
    Abstract: A liquid crystal display device includes a reflection region for reflecting incident light toward a display surface, wherein, the reflection region includes a metal layer formed on a substrate, a semiconductor layer formed above the metal layer, and a reflective layer formed above the semiconductor layer; and the reflection region includes a first recess formed on a surface of the reflective layer, a second recess formed on the surface of the reflective layer in the first recess, and a third recess formed on the surface of the reflective layer in the second recess. The liquid crystal display device provides a low-cost transflective-type or reflection-type liquid crystal display device having a high image quality.
    Type: Application
    Filed: April 5, 2007
    Publication date: July 23, 2009
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Tetsuo Kikuchi, Hajime Imai, Hideki Kitagawa, Mitsunori Imade, Yoshihito Hara, Junya Shimada, Takao Matsumoto
  • Publication number: 20090185127
    Abstract: A display device includes a curved insulative substrate. A substrate line includes first input substrate lines electrically connected to first driving elements and first output substrate lines electrically connected to first lines and the first driving elements. The first output substrate lines are provided so as to be closer to the displaying region than are the first input substrate lines. Each first driving element has a rectangular shape with two longer sides and two shorter sides, the first driving element being mounted so that the longer sides are parallel or substantially parallel to the direction in which the first lines extend.
    Type: Application
    Filed: June 21, 2007
    Publication date: July 23, 2009
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Shinya Tanaka, Hajime Imai, Chikanori Tsukamura, Yoshiharu Kataoka
  • Publication number: 20090179840
    Abstract: In a display device, a first glass substrate is curved. When signal line driving elements and scanning line driving elements are viewed from a normal direction of a principal surface of the first glass substrate, the signal line driving elements and the scanning line driving elements each have a rectangular or substantially rectangular shape with two longer sides and two shorter sides. The signal line driving elements and the scanning line driving elements are mounted so that the longer sides thereof are parallel or substantially parallel to one another.
    Type: Application
    Filed: June 21, 2007
    Publication date: July 16, 2009
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Shinya Tanaka, Hajime Imai, Chikanori Tsukamura, Yoshiharu Kataoka
  • Publication number: 20090102824
    Abstract: In an odd-shaped display whose display area is not rectangular in shape, a defect such as a reduction in the display quality due to the bright line or the like caused by the pixels that are located in a specific portion can be prevented. In an active matrix substrate used as a substrate of such an odd-shaped display in which the distribution area of the pixel electrodes corresponding to the display area has a shape other than rectangular, at least one dummy gate line is formed outside the gate line that is located at the outermost edge on the scanning start side. For peripheral pixels connected to the gate line and the gate line that lies on the scanning end side of the gate line, the gate lines located one row above the respective gate lines are extended on the opposite side of each of the peripheral pixels from the gate line to which the TFT of each of the peripheral pixels is connected. It is preferable that dummy pixels are located on the upper side of the individual peripheral pixels.
    Type: Application
    Filed: March 13, 2007
    Publication date: April 23, 2009
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Shinya Tanaka, Yoshiharu Kataoka, Hajime Imai, Masaya Okamoto, Chikanori Tsukamura
  • Patent number: 7405365
    Abstract: A wiring substrate of the present invention includes a short ring (SR) formed along a periphery of the substrate, an independent line pattern (e.g., a gate terminal) that is coplanar with and independent of SR, a continuous line pattern (e.g., a storage capacitor stem) that is located closest to the independent line pattern and is coplanar and continuous with SR, and an insulating film covering the independent line pattern and the continuous line pattern. The insulating film includes a first through hole reaching the independent line pattern and a second through hole reaching the continuous line pattern.
    Type: Grant
    Filed: September 17, 2003
    Date of Patent: July 29, 2008
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Hajime Imai, Osamu Sugimoto, Katsuhiro Okada, Isao Ogasawara