Patents by Inventor Daiichi Suzuki

Daiichi Suzuki 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: 20160210922
    Abstract: According to one embodiment, a display device includes a display panel including a gate line, source lines, and switching elements connected to the gate line and the respective source lines. A gate driver selects the gate line. A source driver supplies an image signal to the source lines. The image signals can be supplied to pixel electrodes through the switching elements. A frame period includes a first scan period in which the gate line is selected, a first hold period subsequent to the first scan period, a second scan period in which the gate line is selected subsequent to the first hold period, and a second hold period subsequent to the second scan period. The first hold period is longer than the second hold period.
    Type: Application
    Filed: January 8, 2016
    Publication date: July 21, 2016
    Applicant: Japan Display Inc.
    Inventors: Daiichi SUZUKI, Yukio TANAKA, Hirofumi WAKEMOTO
  • Publication number: 20160035322
    Abstract: Provided is an FFS mode liquid crystal display device capable of preventing the occurrence of flicker when the frame frequency is reduced to 30 to 1 Hz from the conventional frame frequency of 60 Hz in order to reduce the power consumption. In the FFS mode liquid crystal display device, a comb-shaped second electrode is placed on a planar first electrode through an insulating film. When the period of rewriting a video signal to a pixel is one frame, the frame is configured with a first scanning period, a second scanning period, and a break period. The voltage supplied to the pixel electrode in the first scanning period is granter than the voltage supplied to the pixel electrode in the second scanning period with respect to the same video signal, and has the same polarity as the polarity of the voltage supplied to the pixel in the second scanning period.
    Type: Application
    Filed: July 27, 2015
    Publication date: February 4, 2016
    Inventors: Yukio Tanaka, Daiichi Suzuki
  • Publication number: 20150356936
    Abstract: According to one embodiment, a display device includes an array substrate including pixel electrodes arranged in a matrix, gate lines and auxiliary capacitance lines extending a first direction, signal lines extending a second direction, and a driving circuit configured to drive the gate lines, the signal lines, and the auxiliary capacitance lines, a counter substrate arranged opposite the array substrate, a liquid crystal layer held between the substrates, and a controller configured to control the driving circuit in such a manner that a polarity of a signal supplied to each of the signal lines varies in units of horizontal periods during a frame period when the polarity control signal for the first scan is identical to the polarity control signal for the second scan.
    Type: Application
    Filed: August 17, 2015
    Publication date: December 10, 2015
    Applicant: Japan Display Inc.
    Inventors: Yukio TANAKA, Daiichi SUZUKI, Kenji NAKAO
  • Publication number: 20150287375
    Abstract: When an intermittent driving mode is carried out in a TFT using LIPS and ?-Si for a pixel transistor, a flicker easily occurs. A display device includes a TFT including a gate, a source, and a drain; a signal line connected to the source; a pixel capacitance connected to the drain; a first power supply configured to supply a potential that breaks electricity conducted between the source and the drain to the gate; and a switch configured to supply a potential of the first power supply to the gate. The display device includes a scan period and a dwell period. The switch is turned on in the scan period, and the switch is turned off in the dwell period.
    Type: Application
    Filed: April 7, 2015
    Publication date: October 8, 2015
    Inventors: Yukio TANAKA, Daiichi SUZUKI, Kenji NAKAO
  • Patent number: 9110319
    Abstract: According to one embodiment, an apparatus includes an array substrate including gate lines and auxiliary capacitance lines extending along a row, signal lines extending along a column, a semiconductor that intersects the gate line via an insulating layer and confronts the auxiliary capacitance line, a contact electrode for electrically connecting the semiconductor to the pixel electrode, a counter substrate, and a liquid crystal layer sandwiched between the substrates. In the pixels disposed side by side in a direction where the gate line extends, the positions of center of gravity of openings surrounded by the gate lines, the signal lines, the auxiliary capacitance line, and ends of the contact electrode are the same in a direction where the signal line extends.
    Type: Grant
    Filed: March 8, 2013
    Date of Patent: August 18, 2015
    Assignee: Japan Display Inc.
    Inventors: Yukio Tanaka, Kenji Nakao, Daiichi Suzuki
  • Publication number: 20150161966
    Abstract: A high-precision display device is capable of suppressing a leak current and operating at a low power consumption. The display device comprises a source power supply for providing a pixel electric potential to each pixel placed on a substrate through a first thin-film transistor; a gate power supply for controlling conductive and nonconductive states of the first thin-film transistor; and a second thin-film transistor disposed between the first thin-film transistor and the gate power supply, the second thin-film transistor being controllable independently of the first thin-film transistor.
    Type: Application
    Filed: December 9, 2014
    Publication date: June 11, 2015
    Inventors: Kenji NAKAO, Yukio TANAKA, Daiichi SUZUKI
  • Patent number: 9030635
    Abstract: According to one embodiment, a liquid crystal display device includes a first substrate, a second substrate and a liquid crystal layer. The first substrate includes a first electrode, a stage including an electrode formation surface, a switching element, a second electrode and a first vertical alignment film. The second substrate includes a third electrode and a second vertical alignment film. The electrode formation surface is positioned closer to the second substrate than a portion of the first vertical alignment film, which opposes the first electrode.
    Type: Grant
    Filed: September 13, 2013
    Date of Patent: May 12, 2015
    Assignee: Japan Display Inc.
    Inventors: Emi Higano, Mitsutaka Okita, Daiichi Suzuki, Kenji Nakao, Kazuhiro Nishiyama
  • Publication number: 20150102988
    Abstract: According to one embodiment, a lateral electric-field type of liquid crystal display device includes a display panel and a controller, wherein a frame frequency falls within a range of 1 Hz to 10 Hz, an off-leak current of each of the TFTs has a value of 1×10?15 A or less, a resistivity of a liquid crystal and a resistivity of an alignment film both fall within one of a first range and a second range, the first range being 1×1013 to 5×1013 ?·cm, the second range being 5×1013 to 5×1014 ?·cm, and a relationship of “R1×C1?R2×C2” is satisfied, where R1 is a resistance and C1 is a capacity with respect to each pixel, R2 is a resistance and C2 is a capacity with respect to each pixel.
    Type: Application
    Filed: October 9, 2014
    Publication date: April 16, 2015
    Applicant: Japan Display Inc.
    Inventors: Daiichi SUZUKI, Yukio TANAKA, Kenji NAKAO, Kazuhiro NISHIYAMA, Shinichi KOMURA, Shinichiro OKA, Mika OIWA
  • Patent number: 8976100
    Abstract: According to one embodiment, a display includes pixel electrodes arranged in a matrix, gate lines extending along rows, signal lines extending along columns, storage capacitance lines extending along the rows to superpose a voltage on the pixel electrodes, a counterelectrode opposed to the pixel electrodes, a driver to drive the gate lines, the signal lines, and the storage capacitance lines, and a controller to control the driver. The controller sequentially drives the gate lines to write from the signal lines to the pixel electrodes and, after the write to the pixel electrodes, changes a potential of each of the storage capacitance lines to cause alignment of the liquid crystal layer to make a transition from splay alignment to bend alignment.
    Type: Grant
    Filed: December 3, 2012
    Date of Patent: March 10, 2015
    Assignee: Japan Display Inc.
    Inventors: Yukio Tanaka, Daiichi Suzuki, Kenji Nakao
  • Publication number: 20150062100
    Abstract: When normal driving is switched to intermittent driving simultaneously with switching from a video image to a still image, a flicker may occur due to a response delay caused by dielectric anisotropy of liquid crystal. A display device has a first mode (video image driving) in which driving is performed at a first frame frequency and a second mode (still image driving) in which the driving is performed at a second frame frequency lower than the first frame frequency. When the first mode is switched to the second mode, the display device first performs the driving at a frame frequency higher than the second frame frequency for at least one frame and then, the driving is switched to be performed at the second frame frequency.
    Type: Application
    Filed: September 4, 2014
    Publication date: March 5, 2015
    Inventors: Yukio TANAKA, Daiichi SUZUKI, Kazuhiro NISHIYAMA
  • Publication number: 20150042912
    Abstract: According to one embodiment, a liquid crystal display apparatus includes a first substrate, a second substrate and a liquid crystal layer. The first substrate includes a first electrode, a wall portion, a switching element, a second electrode and a vertical alignment film. The second substrate includes a third electrode and a second vertical alignment film. The second electrode includes a wall electrode provided on a wall electrode formation surface forming a side surface of the wall portion.
    Type: Application
    Filed: August 8, 2014
    Publication date: February 12, 2015
    Applicant: Japan Display Inc.
    Inventors: Emi Higano, Mitsutaka Okita, Daiichi Suzuki, Kazuhiro Nishiyama
  • Publication number: 20150035816
    Abstract: According to one embodiment, a lateral electric-field type of liquid crystal display device includes a display panel including a plurality of liquid crystal pixels arranged in a matrix, and a controller configured to perform intermittent driving to rewrite an image signal to the liquid crystal pixels, wherein a frame frequency falls within a range of 10 Hz to 20 Hz, and an absolute value of a flexo coefficient (e11, e33) of a liquid crystal applied to the liquid crystal pixels is 1.6 pC/m or less.
    Type: Application
    Filed: August 1, 2014
    Publication date: February 5, 2015
    Applicant: Japan Display Inc.
    Inventors: Daiichi SUZUKI, Yukio Tanaka, Kenji Nakao, Kazuhiro Nishiyama, Shinichi Komura, Shinichiro Oka, Mika Oiwa
  • Publication number: 20140375535
    Abstract: According to one embodiment, a liquid crystal display device includes a first substrate, a second substrate, a liquid crystal layer, a driver and a control circuit. The control circuit is configured to cause the driver to carry out one of an ordinary driving and an intermittent driving, which is set by switching. The control circuit supplies signals to a plurality of pixel electrodes of each of columns of the pixel electrodes in each of frame periods in the intermittent driving, the supplied signals having polarities inverted in units of at least one row.
    Type: Application
    Filed: June 3, 2014
    Publication date: December 25, 2014
    Applicant: Japan Display Inc.
    Inventors: Yukio TANAKA, Daiichi SUZUKI, Kenji NAKAO
  • Publication number: 20140362129
    Abstract: According to one embodiment, a liquid crystal display apparatus includes a display panel on which a plurality of liquid crystal pixels are arrayed in a matrix, a lighting module arranged to be opposed to the display panel and configured to illuminate the display panel, and a control module configured to control image display on the display panel and luminance of a light source of the lighting module, the control module rewriting an image signal to the liquid crystal pixels by intermittent driving and controlling the luminance of the light source to be proportional to a reciprocal of transmittance of the display panel.
    Type: Application
    Filed: May 30, 2014
    Publication date: December 11, 2014
    Applicant: Japan Display Inc.
    Inventors: Yukio TANAKA, Daiichi SUZUKI, Kenji NAKAO
  • Patent number: 8823634
    Abstract: According to one embodiment, a liquid crystal display device includes a liquid crystal display panel, a first illumination unit configured to illuminate the liquid crystal display panel with light which is emitted in a first emission direction, a second illumination unit configured to illuminate the liquid crystal display panel with light which is emitted in a second emission direction different from the first emission direction, and a controller configured to control the liquid crystal display panel, the first illumination unit and the second illumination unit in a first display mode in which 3D display with power saving is effected, and in a second display mode in which 3D display with a wider viewing angle than in the first display mode is effected.
    Type: Grant
    Filed: November 26, 2012
    Date of Patent: September 2, 2014
    Assignee: Japan Display Inc.
    Inventors: Daiichi Suzuki, Kenji Nakao, Kazuhiro Nishiyama, Emi Higano
  • Publication number: 20140078453
    Abstract: According to one embodiment, a liquid crystal display device includes a first substrate, a second substrate and a liquid crystal layer. The first substrate includes a first electrode, a stage including an electrode formation surface, a switching element, a second electrode and a first vertical alignment film. The second substrate includes a third electrode and a second vertical alignment film. The electrode formation surface is positioned closer to the second substrate than a portion of the first vertical alignment film, which opposes the first electrode.
    Type: Application
    Filed: September 13, 2013
    Publication date: March 20, 2014
    Applicant: Japan Display Inc.
    Inventors: Emi HIGANO, Mitsutaka Okita, Daiichi Suzuki, Kenji Nakao, Kazuhiro Nishiyama
  • Publication number: 20130258241
    Abstract: According to one embodiment, a liquid crystal display apparatus includes a display panel, an illumination module which illuminates the display panel, a display controller which controls gradation display which corresponds to an image signal in a first subframe period, and non-gradation display which does not correspond to the image signal in a second subframe period, and performs control in a manner that scanning starting from an upper end and going toward center of the display panel and scanning starting from a lower end and going toward the center of the display panel are alternately performed, and an illumination controller which controls turning on/off of the illumination module.
    Type: Application
    Filed: March 14, 2013
    Publication date: October 3, 2013
    Inventors: Emi HIGANO, Shigesumi Araki, Kazuhiro Nishiyama, Daiichi Suzuki
  • Publication number: 20130258223
    Abstract: According to one embodiment, an apparatus includes an array substrate including gate lines and auxiliary capacitance lines extending along a row, signal lines extending along a column, a semiconductor that intersects the gate line via an insulating layer and confronts the auxiliary capacitance line, a contact electrode for electrically connecting the semiconductor to the pixel electrode, a counter substrate, and a liquid crystal layer sandwiched between the substrates. In the pixels disposed side by side in a direction where the gate line extends, the positions of center of gravity of openings surrounded by the gate lines, the signal lines, the auxiliary capacitance line, and ends of the contact electrode are the same in a direction where the signal line extends.
    Type: Application
    Filed: March 8, 2013
    Publication date: October 3, 2013
    Inventors: Yukio TANAKA, Kenji Nakao, Daiichi Suzuki
  • Publication number: 20130169902
    Abstract: According to one embodiment, a display includes an array substrate including pixel electrodes arranged in a matrix, and alignment film arranged on the pixel electrodes, a countersubstrate provided with counterelectrodes opposed to the pixel electrodes, and an OCB-mode liquid crystal layer held between the array substrate and the countersubstrate. The alignment film and has been subjected to alignment processing in a predetermined direction. Each of the pixel electrodes includes at least one notch defined by continuous edge sides each of which intersects the predetermined direction, and the continuous edge sides include edge sides extending in directions intersecting gate lines and signal lines.
    Type: Application
    Filed: December 21, 2012
    Publication date: July 4, 2013
    Inventors: Tetsuya KOJIMA, Toshiyuki HIGANO, Daiichi SUZUKI
  • Patent number: 8477269
    Abstract: In one embodiment, a liquid crystal display device includes a first substrate having a first pixel electrode and a first pillar-shaped spacer arranged in an active area, and a second pixel electrode and a second pillar-shaped spacer arranged in a shield area surrounding the active area. A shield layer is formed in the shape of a belt crossing above the first pillar-shaped spacer in the active area and extending to the shield area including a portion above the second pillar-shaped spacer. The height of a first seat layer formed above the first pillar-shaped spacer and including the shield layer, a first color filter layer and an overcoat layer is substantially the same as that of a second seat layer formed above the second pillar-shaped spacer and including the shield layer, a second color filter layer and the overcoat layer.
    Type: Grant
    Filed: July 8, 2011
    Date of Patent: July 2, 2013
    Assignee: Japan Display Central Inc.
    Inventors: Satoshi Asada, Daiichi Suzuki, Tetsuo Fukami