Patents by Inventor Yukio Ijima

Yukio Ijima 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: 20170287374
    Abstract: An object of the present invention is to provide a driver IC and a liquid crystal display apparatus which uses a circuit of an output channel which is not used to drive a liquid crystal panel as a backup of the other output channel. A driver IC includes a plurality of output channels ch1 to chn, a plurality of output buffer circuits corresponding to each of the plurality of output channels ch1 to chn, and an output channel selection circuit, and when a malfunction occurs in the output buffer circuit of an effective channel, the output buffer circuit in which the malfunction occurs is automatically switched to the output buffer circuit of an ineffective channel so that the output of the signal from the effective channel is continued.
    Type: Application
    Filed: March 30, 2017
    Publication date: October 5, 2017
    Applicant: Mitsubishi Electric Corporation
    Inventor: Yukio IJIMA
  • Patent number: 9171512
    Abstract: Image signal line driving circuits each include a timing controller that generates a control signal to control the image signal line driving circuit itself and a different image signal line driving circuit. A master belonging to the image signal line driving circuits has a function of applying the control signal to a slave belonging to the image signal line driving circuits. The image signal line driving circuits each include an abnormality detecting circuit that detects an operation abnormality in the image signal line driving circuit itself, and a master/slave switching circuit that sets the image signal line driving circuit itself as the master or slave image signal line driving circuit. When detecting an abnormality, the abnormality detecting circuit outputs a master/slave switching signal, thereby switching the slave image signal line driving circuit to the master and switching the master image signal line driving circuit to the slave.
    Type: Grant
    Filed: October 4, 2013
    Date of Patent: October 27, 2015
    Assignee: Mitsubishi Electric Corporation
    Inventor: Yukio Ijima
  • Patent number: 9165532
    Abstract: Each of image-signal-line drive circuits includes a timing controller that generates a control signal controlling itself and other image-signal-line drive circuit, and a master/slave selection circuit that sets itself as a master mode image-signal-line drive circuit or a slave mode image-signal-line drive circuit based on a selection signal to be given from outside. From among the plurality of image-signal-line drive circuits, the master mode image-signal-line drive circuit gives the control signal to the slave mode image-signal-line drive circuit.
    Type: Grant
    Filed: May 2, 2014
    Date of Patent: October 20, 2015
    Assignee: Mitsubishi Electric Corporation
    Inventor: Yukio Ijima
  • Publication number: 20140347348
    Abstract: Each of image-signal-line drive circuits includes a timing controller that generates a control signal controlling itself and other image-signal-line drive circuit, and a master/slave selection circuit that sets itself as a master mode image-signal-line drive circuit or a slave mode image-signal-line drive circuit based on a selection signal to be given from outside. From among the plurality of image-signal-line drive circuits, the master mode image-signal-line drive circuit gives the control signal to the slave mode image-signal-line drive circuit.
    Type: Application
    Filed: May 2, 2014
    Publication date: November 27, 2014
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventor: Yukio IJIMA
  • Publication number: 20140118316
    Abstract: Image signal line driving circuits each include a timing controller that generates a control signal to control the image signal line driving circuit itself and a different image signal line driving circuit. A master belonging to the image signal line driving circuits has a function of applying the control signal to a slave belonging to the image signal line driving circuits. The image signal line driving circuits each include an abnormality detecting circuit that detects an operation abnormality in the image signal line driving circuit itself, and a master/slave switching circuit that sets the image signal line driving circuit itself as the master or slave image signal line driving circuit. When detecting an abnormality, the abnormality detecting circuit outputs a master/slave switching signal, thereby switching the slave image signal line driving circuit to the master and switching the master image signal line driving circuit to the slave.
    Type: Application
    Filed: October 4, 2013
    Publication date: May 1, 2014
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventor: Yukio IJIMA
  • Patent number: 8115752
    Abstract: An image display device includes: a source wiring; a first gate wiring intersecting the source wiring to scan a first pixel electrode corresponding to a first scanning period; a second gate wiring adjacent to the first gate wiring to scan a second pixel electrode corresponding to a second scanning period consecutive to the first scanning period; a read signal line disposed in parallel to the source wiring; a light sensing element connected to the second gate wiring and the read signal line; and a light detection circuit configured to detect the presence or absence of light directed at the light sensing element upon receiving an output of the light sensing element. The first pixel electrode and the second pixel electrode are AC driven in the same polarity. The output of the light sensing element is connected to the light detection circuit for a predetermined interval during the second scanning period.
    Type: Grant
    Filed: November 30, 2007
    Date of Patent: February 14, 2012
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yukio Ijima, Takayuki Fukuda
  • Patent number: 7764258
    Abstract: A liquid crystal display apparatus includes synchronization signal extracting means for extracting a vertical synchronization signal from a noninterlace signal, first reversal signal generating means for generating a first polarity reversal signal that causes reversal of polarity of a signal voltage every frame for a switching device associated with each of pixels according to the vertical synchronization signal, reversal control signal generating means for generating a reversal control signal according to a result of comparison between frames of the noninterlace signal, second reversal signal generating means for generating a second polarity reversal signal by reversing polarity of the first polarity reversal signal according to the reversal control signal, and switching device driving means for driving each of switching devices according to the second polarity reversal signal.
    Type: Grant
    Filed: April 19, 2005
    Date of Patent: July 27, 2010
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Sachio Kitamura, Yukio Ijima
  • Publication number: 20080186289
    Abstract: An image display device includes: a source wiring; a first gate wiring intersecting the source wiring to scan a first pixel electrode corresponding to a first scanning period; a second gate wiring adjacent to the first gate wiring to scan a second pixel electrode corresponding to a second scanning period consecutive to the first scanning period; a read signal line disposed in parallel to the source wiring; a light sensing element connected to the second gate wiring and the read signal line; and a light detection circuit configured to detect the presence or absence of light directed at the light sensing element upon receiving an output of the light sensing element. The first pixel electrode and the second pixel electrode are AC driven in the same polarity. The output of the light sensing element is connected to the light detection circuit for a predetermined interval during the second scanning period.
    Type: Application
    Filed: November 30, 2007
    Publication date: August 7, 2008
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Yukio IJIMA, Takayuki Fukuda
  • Publication number: 20060262110
    Abstract: A driving method for a display device that includes: plural read signal lines; plural selectors connected to the read signal lines; plural gate signal lines; a photo-sensor connected to one of the read signal lines based on whether the one of the gate signal lines are switched on; and a detection circuit that detects an output value of the photo-sensor and selectively establishes connections with the read signal lines based on whether the selectors are switched on, includes: switching on one of the selectors; switching on the one of the gate signal lines; and detecting the output value. A timing of switching on the one of the gate signal lines is delayed by a specific period from a timing of switching on the one of the selectors. An influence of switching noises to the detection of the output value remains during the specific period.
    Type: Application
    Filed: May 18, 2006
    Publication date: November 23, 2006
    Applicant: MITSUBISHI DENKI KABUSHIKI KAISHA
    Inventors: Takayuki Fukuda, Yukio Ijima, Shigeru Yachi, Yuichi Masutani
  • Publication number: 20060262056
    Abstract: The present invention provides a display device capable of reducing cost by reduction in number of integrators. Signal lines (91 to 94, 95 to 98, 99 to 912, 913 to 916) are brought together into one line by means of signal lines (10a, 10b, 10c, 10d) to be connected to integrators (4a, 4b, 4c, 4d), respectively. Selector lines (71 to 74) orthogonal to the signal lines (91 to 916) are formed and connected to a selector driving circuit (3). An a-SiTFT (12) is formed at each of intersections: an intersection of the selector line (71) and the signal lines (91, 95, 99, 913); an intersection of the selector line (72) and the signal lines (92, 96, 910, 914); an intersection of the selector line (73) and the signal lines (93, 97, 911, 915); and an intersection of the selector line (74) and the signal lines (94, 98, 912, 916). The selector lines (71 to 74) are driven in sequence by the selector driving circuit (3) in the frame period.
    Type: Application
    Filed: April 12, 2006
    Publication date: November 23, 2006
    Applicant: MITSUBISHI DENKI KABUSHIKI KAISHA
    Inventors: Yuichi MASUTANI, Naoki Nakagawa, Shinji Kawabuchi, Shigeru Yachi, Kazunori Okumoto, Yukio Ijima, Takayuki Fukuda
  • Publication number: 20050237287
    Abstract: A liquid crystal display apparatus includes synchronization signal extracting means for extracting a vertical synchronization signal from a noninterlace signal, first reversal signal generating means for generating a first polarity reversal signal that causes reversal of polarity of a signal voltage every frame for a switching device associated with each of pixels according to the vertical synchronization signal, reversal control signal generating means for generating a reversal control signal according to a result of comparison between frames of the noninterlace signal, second reversal signal generating means for generating a second polarity reversal signal by reversing polarity of the first polarity reversal signal according to the reversal control signal, and switching device driving means for driving each of switching devices according to the second polarity reversal signal.
    Type: Application
    Filed: April 19, 2005
    Publication date: October 27, 2005
    Applicant: MITSUBISHI DENKI KABUSHIKI KAISHA
    Inventors: Sachio Kitamura, Yukio Ijima
  • Patent number: 6707439
    Abstract: In the conventional method of achieving a fast response of a liquid crystal panel, even if the frame rate or the ambient temperature varies, if the image data are the same, the correction value will always be constant; accordingly, the conventional method is impossible of a correction in accordance with the environmental conditions in use. The liquid crystal display of the invention is provided with a plurality of look-up tables, each of which outputs a correction data for correcting an image data to increase the response speed of transmittance of the liquid crystal panel by using the two inputs of the input image data and the image data one frame before that an image memory storing the input image data outputs.
    Type: Grant
    Filed: September 26, 2001
    Date of Patent: March 16, 2004
    Assignee: Kabushiki Kaisha Advanced Display
    Inventors: Yukio Ijima, Seiki Takahashi, Shiro Miyake
  • Publication number: 20020044151
    Abstract: In the conventional method of achieving a fast response of a liquid crystal panel, even if the frame rate or the ambient temperature varies, if the image data are the same, the correction value will always be constant; accordingly, the conventional method is impossible of a correction in accordance with the environmental conditions in use. The liquid crystal display of the invention is provided with a plurality of look-up tables, each of which outputs a correction data for correcting an image data to increase the response speed of transmittance of the liquid crystal panel by using the two inputs of the input image data and the image data one frame before that an image memory storing the input image data outputs.
    Type: Application
    Filed: September 26, 2001
    Publication date: April 18, 2002
    Inventors: Yukio Ijima, Seiki Takahashi, Shiro Miyake