Patents by Inventor Toshio Miyazawa

Toshio Miyazawa 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: 7796109
    Abstract: A voltage level converter for driving resistive and capacitive loads of a display device includes a charge circuit having a capacitance, a transistor NMOS1, a capacitance, and a transistor; a discharge circuit having transistors; and a reset signal generating circuit provided in a preceding stage of the discharge circuit. A signal having an inverted phase to an input pulse is applied to the reset signal generating circuit. An output of the reset signal generating circuit is supplied to gate terminals of the transistors, thus realizing reliable turning ON or OFF the discharge circuit.
    Type: Grant
    Filed: May 31, 2006
    Date of Patent: September 14, 2010
    Assignee: Hitachi Displays, Ltd.
    Inventors: Norio Mamba, Toshio Miyazawa, Yasuyuki Kudo
  • Patent number: 7777230
    Abstract: The present invention provides a display device having thin film transistors which can reduce an OFF current in spite of the extremely simple constitution. In the display device having thin film transistors on a substrate, each thin film transistor includes a gate electrode which is connected with a gate signal line, a semiconductor layer which is formed astride the gate electrode by way of an insulation film, a drain electrode which is connected with a drain signal line and is formed on the semiconductor layer, and a source electrode which is formed on the semiconductor layer in a state that the source electrode faces the drain electrode in an opposed manner, and a side of the drain electrode which faces the source electrode does not overlap the gate electrode as viewed in a plan view, and a side of the source electrode which faces the drain electrode does not overlap the gate electrode as viewed in a plan view.
    Type: Grant
    Filed: June 10, 2008
    Date of Patent: August 17, 2010
    Assignee: Hitachi Displays, Ltd.
    Inventors: Hidekazu Miyake, Takuo Kaitoh, Takeshi Noda, Toshio Miyazawa
  • Patent number: 7773810
    Abstract: An image processing unit executes an image process on a target image based on process-setting contents, and generates a processed image. An area extracting unit compares the processed image with the target image, and extracts a partial area of a predetermined size showing a notable effect of the image process executed on the target image, as a checking area. A checking-image display unit displays the processed image corresponding to the extracted checking area on a display unit, as a checking image for checking the process-setting contents of the image process.
    Type: Grant
    Filed: September 13, 2006
    Date of Patent: August 10, 2010
    Assignee: Ricoh Company, Ltd.
    Inventors: Tetsuya Sakayori, Junichi Takami, Bin Lu, Yu Sekiguchi, Yoshinaga Kato, Yoshifumi Sakuramata, Iwao Saeki, Toshio Miyazawa
  • Patent number: 7768614
    Abstract: The present invention provides a liquid crystal display device which can reduce the difference in brightness between an image obtained from a reflection region and an image obtained from a transmission region. The liquid crystal display device includes a pixel electrode and a counter electrode in each pixel region on a liquid-crystal-side surface of one substrate out of respective substrates which are arranged to face each other with liquid crystal therebetween. The pixel region includes a transmission region and a reflection region. A gap between the pixel electrode and the counter electrode in the reflection region is set larger than the gap between the pixel electrode and the counter electrode in the transmission region.
    Type: Grant
    Filed: May 14, 2009
    Date of Patent: August 3, 2010
    Assignee: Hitachi Displays, Ltd.
    Inventors: Atsushi Hasegawa, Toshio Miyazawa
  • Patent number: 7764264
    Abstract: The present invention provides a display device that has a driving circuit including a single channel bidirectional shift register with which the circuit scale can be reduced without increasing the number of elements. The driving circuit includes a single channel bidirectional shift register. This single channel bidirectional shift register has an RS flip-flop circuit. The RS flip-flop circuit includes a first transistor having a first electrode connected to an output terminal and having a second electrode to which a second scanning direction control signal is applied and a second transistor having a first electrode connected to an output terminal and having a second electrode to which a first scanning direction control signal is applied.
    Type: Grant
    Filed: November 17, 2006
    Date of Patent: July 27, 2010
    Assignee: Hitachi Displays, Ltd.
    Inventors: Takayuki Nakao, Masahiro Maki, Hideo Sato, Toshio Miyazawa
  • Publication number: 20100177073
    Abstract: A display device is provided which includes a common electrode drive circuit having the single channel constitution which can miniaturize a circuit scale without increasing elements compared to a conventional display device. A display device includes a plurality of pixels and a common electrode drive circuit. The common electrode drive circuit includes a plurality of basic circuits, wherein the basic circuit includes a first circuit which latches a first input signal at a point of time that a clock signal is changed to a first voltage level from a second voltage level; a second circuit which latches a second input signal at the point of time that the clock signal is changed to the first voltage level from the second voltage level; a first switching circuit which is turned on based on the first circuit and a second switching circuit which is turned on based on the second circuit.
    Type: Application
    Filed: March 23, 2010
    Publication date: July 15, 2010
    Inventors: Takayuki NAKAO, Hideo Sato, Masahiro Maki, Toshio Miyazawa
  • Publication number: 20100177147
    Abstract: An inkjet recording apparatus comprises an inkjet recording head, an ink-testing unit having an ink-test chamber, a pressure-vibration generating unit that generates a pressure vibration in the ink-test chamber, a pressure-vibration detecting unit that detects the pressure vibration, an ink inlet that introduces ink into the ink-test chamber and an ink outlet through which ink is discharged from the ink-test chamber. Failures of ink ejection can be prevented by detecting cavitation cores by the ink-test chamber and removing ink containing the cavitation cores from ink supplied to the inkjet recording head.
    Type: Application
    Filed: February 4, 2010
    Publication date: July 15, 2010
    Applicant: TOSHIBA TEC KABUSHIKI KAISHA
    Inventors: Ryutaro Kusunoki, Tomoka Takanose, Toshio Miyazawa
  • Publication number: 20100171739
    Abstract: The present invention provides a display device which includes a common electrode drive circuit having the single channel constitution which can miniaturize a circuit scale without increasing elements compared to a conventional display device. A display device includes a plurality of pixels and a common electrode drive circuit. The common electrode drive circuit includes a plurality of basic circuits, wherein the basic circuit includes a first circuit which latches a first input signal at a point of time that a clock signal is changed to a first voltage level from a second voltage level; a second circuit which latches a second input signal at the point of time that the clock signal is changed to the first voltage level from the second voltage level; a first switching circuit which is turned on based on the first circuit and a second switching circuit which is turned on based on the voltage second circuit.
    Type: Application
    Filed: January 8, 2010
    Publication date: July 8, 2010
    Inventors: Takayuki NAKAO, Hideo Sato, Masahiro Maki, Toshio Miyazawa
  • Patent number: 7746306
    Abstract: A display device including: a plurality of pixels arranged in a matrix array; a selector circuit for selecting one from a plurality of rows of pixels in said matrix array; and a video signal supplying circuit for supplying a video signal to each of pixels in said selected row in synchronism with said selection of said selected row, wherein said video signal supplying circuit is provided with a transfer-data processing section for generating a data signal at a time assigned to a gray scale level, in accordance with n-bit data information representing said gray scale level, and a gray-scale voltage selector circuit section for supplying as said video signal, a voltage signal selected from among a plurality of gray-scale voltages, based upon said time associated with said data signal, said plurality of gray-scale voltages being successively selected.
    Type: Grant
    Filed: May 25, 2007
    Date of Patent: June 29, 2010
    Assignee: Hitachi, Ltd.
    Inventor: Toshio Miyazawa
  • Patent number: 7724231
    Abstract: The present invention provides a display device which includes a common electrode drive circuit having the single channel constitution which can miniaturize a circuit scale without increasing elements compared to a conventional display device. A display device includes a plurality of pixels and a common electrode drive circuit. The common electrode drive circuit includes a plurality of basic circuits, wherein the basic circuit includes a first circuit which latches a first input signal at a point of time that a clock signal is changed to a first voltage level from a second voltage level; a second circuit which latches a second input signal at the point of time that the clock signal is changed to the first voltage level from the second voltage level; a first switching circuit which is turned on based on the first circuit; and a second switching circuit which is turned on based on the the second circuit.
    Type: Grant
    Filed: March 21, 2006
    Date of Patent: May 25, 2010
    Assignee: Hitachi Displays, Ltd.
    Inventors: Takayuki Nakao, Hideo Sato, Masahiro Maki, Toshio Miyazawa
  • Publication number: 20100117091
    Abstract: A display device having thin film transistors which can acquire an appropriate ON current and an appropriate OFF current and a manufacturing method thereof are provided. A display device includes: a transparent substrate; and a plurality of thin film transistors which are formed on the transparent substrate.
    Type: Application
    Filed: November 6, 2009
    Publication date: May 13, 2010
    Inventors: Takuo KAITOH, Toshio MIYAZAWA
  • Publication number: 20100109009
    Abstract: Provided is a display device capable of suppressing generation of optical leakage current as well as increase in capacitance in a case where a plurality of thin film transistors (TFTs) including a gate electrode film on a light source side are formed in series. Relative areas of opposing regions between a semiconductor film and the gate electrode film with respect to channel regions are different in at least a part of the plurality of TFTs, to thereby provide a flat panel display having a structure for suppressing increase in capacitance while suppressing generation of optical leakage current.
    Type: Application
    Filed: October 29, 2009
    Publication date: May 6, 2010
    Inventors: Takeshi NODA, Toshio MIYAZAWA, Takuo KAITOH, Hiroyuki ABE
  • Publication number: 20100096645
    Abstract: A manufacturing method of a display device and a display device which can reduce the number of times that an insulation substrate is put into a CVD device and is taken out from the CVD device are provided.
    Type: Application
    Filed: October 15, 2009
    Publication date: April 22, 2010
    Inventors: Daisuke Sonoda, Toshio Miyazawa, Takuo Kaitoh, Yasukazu Kimura, Takeshi Kuriyagawa, Takeshi Noda
  • Patent number: 7692614
    Abstract: A display device including: pixels disposed where scanning lines and signal lines intersect, wherein each of the pixels includes a pixel electrode, a switching element, and a storage circuit interposed between the pixel electrode and the switching element for storing data to be written in the pixel electrode; and a pair of alternating voltage power lines having a first alternating voltage power line and a second alternating voltage power line for applying alternating voltages varying in polarities opposite to each other, to the storage circuit, wherein the storage circuit includes a first transistor pair of a first NMOS transistor and a first PMOS transistor connecting in series while bridging the paired alternating voltage power lines, and a second transistor pair of second NMOS transistor and a second PMOS transistor connected in series while bridging the paired alternating voltage power lines. The transistors have specific interconnections.
    Type: Grant
    Filed: January 23, 2007
    Date of Patent: April 6, 2010
    Assignee: Hitachi Displays, Ltd.
    Inventor: Toshio Miyazawa
  • Publication number: 20100073389
    Abstract: In a display device which arranges a memory part for every display pixel, an erroneous operation of the memory part and the power consumption can be reduced. In a display device provided with a display panel which includes a plurality of display pixels, video lines which apply video data to the display pixels, and scanning lines which apply a scanning voltage to the display pixels, the display pixel includes a memory part which stores the video data, a pixel electrode, and a switching part which selectively applies a first video voltage or a second video voltage which differs from the first video voltage to the pixel electrode in response to the video data stored in the memory part.
    Type: Application
    Filed: November 24, 2009
    Publication date: March 25, 2010
    Applicant: Hitachi Displays, Ltd.
    Inventors: Kozo Yasuda, Toshio Miyazawa, Hiroyuki Abe
  • Patent number: 7684648
    Abstract: An apparatus, method, system, computer program and product, capable of reducing the size of an original image. The method segments the original image into a first image and a second image, generates a first reduced size image from the first image, which includes a first target pixel having a value obtained using a first method, and generates a second reduced size image from the second image, which includes a second target pixel having a value obtained using a second method.
    Type: Grant
    Filed: January 17, 2006
    Date of Patent: March 23, 2010
    Assignee: Ricoh Company, Limited
    Inventors: Toshio Miyazawa, Fumihiro Hasegawa, Toshifumi Yamaai
  • Patent number: 7681997
    Abstract: An inkjet recording apparatus comprises an inkjet recording head, an ink-testing unit having an ink-test chamber, a pressure-vibration generating unit that generates a pressure vibration in the ink-test chamber, a pressure-vibration detecting unit that detects the pressure vibration, an ink inlet that introduces ink into the ink-test chamber and an ink outlet through which ink is discharged from the ink-tester chamber. Failures of ink ejection can be prevented by detecting cavitation cores by the ink-test chamber and removing ink containing the cavitation cores from ink supplied to the inkjet recording head.
    Type: Grant
    Filed: June 6, 2007
    Date of Patent: March 23, 2010
    Assignee: Toshiba Tec Kabushiki Kaisha
    Inventors: Ryutaro Kusunoki, Tomoka Takanose, Toshio Miyazawa
  • Patent number: 7675592
    Abstract: The manufacturing yield of transflective liquid crystal display devices is to be enhanced.
    Type: Grant
    Filed: June 21, 2007
    Date of Patent: March 9, 2010
    Assignee: Hitachi Displays, Ltd.
    Inventors: Takahiro Ochiai, Takayuki Nakao, Daisuke Sonoda, Hidekazu Miyake, Toshio Miyazawa, Masahiro Maki, Tohru Sasaki
  • Patent number: 7675596
    Abstract: A semi-transparent homogeneous-alignment LCD device including a transmission part and a reflection part, a first linear dielectric protrusion disposed between a common electrode and a liquid crystal layer so as to extend over a plurality of pixels in a short side direction of pixels and be disposed nearly in center of the transmission part, and a second linear dielectric protrusion disposed in the reflection part between the common electrode and a first substrate so as to extend over a plurality of pixels in the short side direction, wherein an alignment direction of liquid crystal molecules crosses the first and second linear dielectric protrusions at right angles and is parallel to a long side direction of pixels, and a tilt angle of the liquid crystal molecules is approximately 0°, or even if there is a pre-tilt angle, the tilt angle of the liquid crystal molecules is 2° or less.
    Type: Grant
    Filed: August 17, 2006
    Date of Patent: March 9, 2010
    Assignee: Hitachi Displays, Ltd.
    Inventors: Shoichi Hirota, Osamu Itou, Shinichiro Oka, Masaya Adachi, Shinichi Komura, Hirotaka Imayama, Masateru Morimoto, Tetsuya Nagata, Koichi Fukuda, Toshio Miyazawa
  • Publication number: 20100032674
    Abstract: An object of the present invention is to provide a display device where small thin film transistors with a lower off current can be formed.
    Type: Application
    Filed: August 5, 2009
    Publication date: February 11, 2010
    Inventors: Takeshi Noda, Toshio Miyazawa, Takuo Kaitoh, Takumi Shigaki