Patents Assigned to Japan Display East Inc.
  • Patent number: 8982311
    Abstract: A pixel electrode is formed on a TFT substrate, and a gate insulating film, an inorganic passivation film, a common electrode, and an alignment film are formed in this order thereover. A columnar spacer is formed to the counter substrate and is adapted to define a gap between the TFT substrate and the counter substrate. A through hole is formed in the gate insulating film of the TFT substrate, and the columnar spacer is disposed so as to cover a concave portion formed by the through hole. Since the area of contact between the columnar spacer and the TFT substrate is decreased, it is possible to suppress scraping of the alignment film and thus to prevent occurrence of bright spots.
    Type: Grant
    Filed: December 20, 2012
    Date of Patent: March 17, 2015
    Assignee: Japan Display East Inc.
    Inventor: Takahiro Nagami
  • Patent number: 8673545
    Abstract: In a method of manufacturing a liquid crystal display device in which a plurality of pixels are arranged in a matrix, each of the pixels has an insulator wall structure at a boundary of the pixels, and a wall electrode is provided at least at a side of the wall structure, the wall structure being formed by: using a chemically amplified resist as a material of the wall structure, a step of applying the chemically amplified resist; a step of exposing and developing the chemically amplified resist; a step of irradiating light on an entire surface to perform post exposure; a step of pre-calcinating the chemically amplified resist at a temperature lower than a main calcination temperature; and a step of performing main calcination at a temperature higher than a pre-calcination temperature.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: March 18, 2014
    Assignee: Japan Display East Inc.
    Inventors: Toshimasa Ishigaki, Daisuke Sonoda, Masanao Yamamoto, Osamu Itou, Takato Hiratsuka
  • Publication number: 20130323997
    Abstract: Provided is a method of manufacturing a display device that includes a structure formed so as to protrude at least in a normal direction of a first substrate, and an electrode formed in a side wall surface of the structure, the method including: forming a transparent conductive film for the electrode; forming a low-affinity material having a low affinity for a resist film on an upper surface of the transparent conductive film formed in a head surface of the structure; forming a resist film by applying a liquid resist material to an upper layer of the transparent conductive film and then fixing the resist material; forming an opening that exposes the transparent conductive film in the resist film by removing the low-affinity material; etching the transparent conductive film which is a lower layer using the resist film as a protective film; and removing the resist film.
    Type: Application
    Filed: March 27, 2013
    Publication date: December 5, 2013
    Applicant: Japan Display East Inc.
    Inventors: Masanao YAMAMOTO, Daisuke SONODA, Osamu ITOU, Takato HIRATSUKA
  • Publication number: 20130321382
    Abstract: In a liquid crystal display (LCD) device having a touch panel function, power consumption is reduced in the standby state. The display section is divided into blocks each of which is formed of a plurality of display lines. The counter electrode is disposed for each block. A driving circuit selectively supplies, to the counter electrode of each block, the voltage used for the liquid crystal display and the voltage used for the touch panel scanning. The driving circuit has a source amplifier that supplies the video voltages to the video lines. The driving circuit reduces the current in the source amplifier, such that the current is lower than current at the time of a normal operation, to lower the power consumption, and stops the operation of the source amplifier and supplies the GND voltage to the video lines to further lower the power consumption.
    Type: Application
    Filed: March 27, 2013
    Publication date: December 5, 2013
    Applicant: Japan Display East Inc.
    Inventor: Shouji NAGAO
  • Publication number: 20130299830
    Abstract: In order to improve the transmissivity of each pixel and the brightness of a high-definition screen, a TFT and a projection are disposed in each pixel, a source electrode of the TFT extends so as to cover the projection, an inorganic passivation film is formed over the TFT and the projection, an organic passivation film is formed on the inorganic passivation film on the TFT, an opposed electrode is formed on the organic passivation film, an upper insulation film is formed over the opposed electrode, a pixel electrode is formed on the upper insulation film, and the pixel electrode is connected to the source electrode through a connection hole formed in the inorganic passivation film and the upper insulation film on the projection. Accordingly, the diameter of a through-hole can be made smaller.
    Type: Application
    Filed: March 25, 2013
    Publication date: November 14, 2013
    Applicant: Japan Display East Inc.
    Inventors: Toshimasa ISHIGAKI, Fumio TAKAHASHI, Hideki KURIYAMA
  • Publication number: 20130299082
    Abstract: A liquid crystal parallax barrier panel and a liquid crystal display panel are held by vacuum-holding, and aligned so as to be laminated via an adhesive. After the lamination, the vacuum-holding is released. Then lamination of the liquid crystal display panel and the liquid crystal parallax barrier panel is finely adjusted, and the adhesive is temporarily cured by radiating ultraviolet rays. The adhesive is primarily cured and further thermally cured by ultraviolet rays to complete manufacturing of a three dimensional display device. Release of the vacuum-holding before temporary adhesion using ultraviolet rays allows suppression of deformation of a TFT substrate owing to the vacuum-holding as well as the gap unevenness and the color shading of the liquid crystal panel.
    Type: Application
    Filed: March 15, 2013
    Publication date: November 14, 2013
    Applicant: JAPAN DISPLAY EAST INC.
    Inventors: Hiroyuki YAMAZAKI, Setsuo KOBAYASHI, Takeharu FURUSAWA, Sakae ISHII
  • Publication number: 20130300975
    Abstract: An upper frame covers a periphery of a liquid crystal display panel, and a cover plate is bonded onto the upper frame and an upper polarizing plate of the liquid crystal display panel. A step is formed on the cover plate in a portion where the upper frame is bonded to the cover plate. This can reduce a thickness of resin between the upper polarizing plate and the cover plate, thereby reducing an extrusion of the resin into between the cover plate and the upper frame. Thus, a chamfer on a lower side of the cover plate can be reduced in size, and stray light from the lower side of the cover plate can be prevented. This can prevent a white line around a screen.
    Type: Application
    Filed: March 25, 2013
    Publication date: November 14, 2013
    Applicant: Japan Display East Inc.
    Inventor: Yuuji SUZUKI
  • Publication number: 20130300974
    Abstract: The present invention relates to a liquid crystal display device in which an upper frame covers the periphery of a liquid crystal display panel, and a front window is provided on the liquid crystal display panel and the upper frame. A cutout is formed in the corner portion of the upper frame, allowing the liquid crystal display panel to be exposed in the corner portion thereof. Thus, in a corner portion in which the cutout is formed in the upper frame, a side surface of the liquid crystal display panel and a side surface of the front window are directly matched for accurate positioning of the display area of the liquid crystal display panel.
    Type: Application
    Filed: March 14, 2013
    Publication date: November 14, 2013
    Applicant: JAPAN DISPLAY EAST INC.
    Inventor: Takashi YOSHIMOTO
  • Publication number: 20130293791
    Abstract: The presence or absence of touch is detected according to a difference of a capacitance caused by the presence or absence of a material that blocks the electric field formed between the detection electrode and the common electrode. The common electrode includes a plurality of divided electrode portions that is extended in a lateral direction and aligned with each other in a longitudinal direction. Each of the plurality of common lines is electrically connected to at least one of the divided electrode portions. The plurality of common lines is arranged in an area next to the common electrode in the lateral direction of the common electrode, arranged next to each other in a width direction orthogonal to a length thereof, is different in width from each other, and the width of the common lines is wider as the length is longer.
    Type: Application
    Filed: March 27, 2013
    Publication date: November 7, 2013
    Applicant: Japan Display East Inc.
    Inventors: Hiroyuki ABE, Masahiro MAKI, Takayuki SUZUKI
  • Publication number: 20130284350
    Abstract: An ultraviolet-curable resin is formed over a touch panel, and a liquid crystal display panel is bonded to the touch panel. Subsequently, an ultraviolet-curable resin is formed over the touch panel, and a front window is bonded to the touch panel. While the ultraviolet-curable resin is cured unevenly due to a black-frame print made around the periphery of the front window, the touch panel and the counter substrate of the liquid crystal display panel are already bonded together at this time. This prevents the uneven cure of the ultraviolet-curable resin from distorting the counter substrate alone. As a result, it is possible to avoid unevenness of the gap between the counter substrate and the TFT substrate of the liquid crystal display panel and the resulting yellowing around the periphery.
    Type: Application
    Filed: March 15, 2013
    Publication date: October 31, 2013
    Applicant: JAPAN DISPLAY EAST INC.
    Inventors: Akira ISHII, Setsuo KOBAYASHI, Katsuhiko ISHII, Kiyoshi SENTO
  • Publication number: 20130286315
    Abstract: The liquid crystal display panel according to the present invention is a liquid crystal display panel LCD wherein a CF substrate S1 on which color filters are formed and a TFT substrate S2 on which thin film transistor circuits are formed are layered on top of each other with liquid crystal being sealed between the two substrates, characterized in that a black light blocking region BM is formed in a frame portion of the CF substrate S1, and an identification mark M drawn as a negative pattern is provided to a part of the light blocking region, and a metal film MT1 is provided to the TFT substrate S2 in such a location as to block light that transmits through the identification mark.
    Type: Application
    Filed: March 14, 2013
    Publication date: October 31, 2013
    Applicant: JAPAN DISPLAY EAST INC.
    Inventor: Syou YANAGISAWA
  • Publication number: 20130278516
    Abstract: Provided is a display device that includes a display panel; and a touch panel integrated in the display panel, wherein the touch panel has a plurality of scanning electrodes, a plurality of detection electrodes that intersects with the plurality of scanning electrodes, drive signal supply unit for inputting a drive signal to each of the scanning electrodes, detection unit for acquiring a detection signal from each of the detection electrodes, touch position detection unit for detecting a touch position of an detection object based on the detection signal when the drive signal is sequentially input to each of the scanning electrodes from the drive signal supply unit, and approach detection unit for detecting that the detection object approaches the touch panel based on the detection signal when a scanning voltage is collectively input to all of the scanning electrodes from the drive signal supply unit.
    Type: Application
    Filed: March 27, 2013
    Publication date: October 24, 2013
    Applicant: Japan Display East Inc.
    Inventors: Koji NAGATA, Koji DOI
  • Publication number: 20130278855
    Abstract: A thin film transistor includes, an insulating substrate, a gate electrode provided on an upper surface of the insulating substrate, a gate insulating film formed so as to cover the gate electrode, an oxide semiconductor layer provided on the gate insulating film, a channel protective layer provided at least on an upper surface of the oxide semiconductor layer, and a source electrode and a drain electrode provided so as to come into contact with the oxide semiconductor layer, wherein the channel protective layer is formed such that the film density of a portion provided so as to come into contact with the oxide semiconductor layer is higher than the film density of a portion distant from the oxide semiconductor layer.
    Type: Application
    Filed: March 27, 2013
    Publication date: October 24, 2013
    Applicant: Japan Display East Inc.
    Inventors: Norihiro UEMURA, Takeshi NODA, Hidekazu MIYAKE, Isao SUZUMURA
  • Publication number: 20130278553
    Abstract: A display device includes pixel electrodes formed in an image display area of a substrate, a common electrode formed in the image display area, inside signal lines formed inside the image display area, and electrically connected to the pixel electrodes, outside signal lines formed outside the image display area, and electrically connected to the inside signal lines, and a common line formed inside and outside the image display area, and electrically connected to the common electrode. An image is displayed under a control of a light using an electric field developed between the pixel electrodes and the common electrode. A coupling capacitance is formed between the inside signal lines and the common electrode. The outside signal lines each include a first portion, and a second portion higher in electric resistance than the first portion and the inside signal lines.
    Type: Application
    Filed: March 27, 2013
    Publication date: October 24, 2013
    Applicant: Japan Display East Inc.
    Inventors: Takayuki SUZUKI, Hiroyuki ABE, Masahiro MAKI, Mitsuru GOTO
  • Publication number: 20130280661
    Abstract: In a method of manufacturing a liquid crystal display device in which a plurality of pixels are arranged in a matrix, each of the pixels has an insulator wall structure at a boundary of the pixels, and a wall electrode is provided at least at a side of the wall structure, the wall structure being formed by: using a chemically amplified resist as a material of the wall structure, a step of applying the chemically amplified resist; a step of exposing and developing the chemically amplified resist; a step of irradiating light on an entire surface to perform post exposure; a step of pre-calcinating the chemically amplified resist at a temperature lower than a main calcination temperature; and a step of performing main calcination at a temperature higher than a pre-calcination temperature.
    Type: Application
    Filed: March 15, 2013
    Publication date: October 24, 2013
    Applicant: JAPAN DISPLAY EAST INC.
    Inventors: Toshimasa ISHIGAKI, Daisuke SONODA, Masanao YAMAMOTO, Osamu ITOU, Takato HIRATSUKA
  • Publication number: 20130278858
    Abstract: A display device includes: a first substrate which has an image display region; colored layers of plural colors which are arranged in rows on the first substrate and constitute a color filter in the image display region; and a black matrix which is provided for preventing leakage of light as well as color mixing between the colored layers arranged adjacent to each other. The black matrix includes a frame-shaped portion which surrounds the image display region. The frame-shaped portion is formed such that the frame-shaped portion has a notch on an outer side thereof and covers a periphery of the first substrate except for the notch where the frame-shaped portion does not cover the periphery of the first substrate. The colored layer of at least one color is arranged in the notch.
    Type: Application
    Filed: March 27, 2013
    Publication date: October 24, 2013
    Applicant: Japan Display East Inc.
    Inventor: Satoshi HASHIMOTO
  • Publication number: 20130278564
    Abstract: A display device includes a display panel and a touch panel built in the display panel. The touch panel includes a sensitivity correcting unit configured to correct the sensitivity of the touch panel. The sensitivity correcting unit includes a difference acquiring unit configured to acquire a signal difference (S1?S2) between a detection signal S1 acquired by detection electrodes when a driving signal V1 is input to scanning electrodes from a driving-signal supplying unit and a detection signal S2 (S1>S2) acquired by the detection electrodes when a driving signal V2 (V1>V2) different from the driving signal V1 is input to the scanning electrodes from the driving-signal supplying unit and a parameter changing unit configured to change parameters of at least one of the driving-signal supplying unit and a detecting unit when the signal difference (S1?S2) is equal to or smaller than a predetermined threshold.
    Type: Application
    Filed: March 27, 2013
    Publication date: October 24, 2013
    Applicant: Japan Display East Inc.
    Inventors: Koji NAGATA, Tsutomu FURUHASHI, Koji DOI, Shinji SEKIGUCHI
  • Publication number: 20130271710
    Abstract: A liquid crystal display device sandwiching liquid crystal between a TFT substrate having a rectangular plane and an opposing substrate having a rectangular plane, wherein a long side of the TFT substrate is longer than a long side of the opposing substrate, the long side of the opposing substrate is formed with a chamfer, and a light shielding film made of metal is formed on the TFT substrate around a position corresponding to the center of the long side of the opposing substrate. By using the light shielding film, the chipping condition of the opposing substrate near the chamfer can be accurately and rapidly evaluated.
    Type: Application
    Filed: March 18, 2013
    Publication date: October 17, 2013
    Applicant: JAPAN DISPLAY EAST INC.
    Inventors: Makoto TATEMURA, Yuichi NAKAMURA, Masaharu ITAKURA, Yoshitomo OGISHIMA
  • Publication number: 20130271439
    Abstract: A liquid crystal display device includes a plurality of video signal lines that extends in columns in a display area, a plurality of inversion control signal line each supplied with an inversion control signal for controlling inversion, a first selector that selects one of a pair of amplifiers different in the polarity from each other to input signals corresponding to a pair of adjacent video signal lines on the basis of the inversion control signal, and a second selector that selects one of a pair of the corresponding adjacent video signal lines to input signals output from the pair of amplifiers on the basis of the inversion control signal, in which at least one of the signals to be supplied to the plurality of inversion control signal lines is a signal different from other signals.
    Type: Application
    Filed: March 27, 2013
    Publication date: October 17, 2013
    Applicant: Japan Display East Inc.
    Inventors: Keitoku KATO, Hiroyuki NITTA, Gou YAMAMOTO
  • Publication number: 20130271702
    Abstract: A main voltage step-up circuit includes a coil which one end thereof is connected to a power supply; a main switching element which is connected between the other end of the coil and a ground potential, and which is controlled by the main control circuit; a diode which is connected to the other end of the coil; a smoothing capacitor which is connected to the diode and is a ceramic capacitor; and an auxiliary voltage step-up circuit which is connected to the other end of the coil. The auxiliary voltage step-up circuit is ON when the main step-up voltage circuit is OFF, and compensates a potential change in the smoothing capacitor. The auxiliary voltage step-up circuit includes an auxiliary switching element which is connected between the other end of the coil and a ground potential; and an auxiliary control circuit which controls the auxiliary switching element.
    Type: Application
    Filed: March 27, 2013
    Publication date: October 17, 2013
    Applicant: Japan Display East Inc.
    Inventor: Satoshi TAKAHASHI