Patents Assigned to Fujitsu Display Technologies
  • Patent number: 6879364
    Abstract: A liquid crystal display apparatus including a pair of substrates having electrodes and vertical alignment layers. A liquid crystal having a negative anisotropy of dielectric is inserted between the substrates. Each substrate has linearly arranged alignment control structures for controlling the alignment of the liquid crystal. The alignment control structures are formed in the form of projections or slits. Each alignment control structure is formed of a plurality of constituent units. In addition, means for forming a boundary of alignment of liquid crystal (singular point in director field) to control the liquid crystal located on the alignment control structures.
    Type: Grant
    Filed: July 17, 2003
    Date of Patent: April 12, 2005
    Assignee: Fujitsu Display Technologies Corporation
    Inventors: Takahiro Sasaki, Arihiro Takeda, Katsufumi Ohmuro, Hideo Chida, Yoshio Koike, Kimiaki Nakamura, Kunihiro Tashiro
  • Patent number: 6876422
    Abstract: A liquid-crystal display unit is provided. The liquid-crystal display unit comprises a first board having a signal line, a scanning line and a pixel electrode, a second board having a common electrode, a liquid-crystal layer provided between the first board and the second board, and a third board having at least one of a signal-line driver driving the signal line and a scanning-line driver driving the scanning line. The second board is positioned to oppose the first board. The third board is separated from the first board and the second board.
    Type: Grant
    Filed: August 15, 2001
    Date of Patent: April 5, 2005
    Assignee: Fujitsu Display Technologies Corporation
    Inventors: Masaru Ishiwa, Susumu Okazaki
  • Patent number: 6872978
    Abstract: In the fabrication of a CMOS-TFT, non-selectively doping (for both of p- and n-type TFTs) and selectively doping (only for the n-type TFT) with p-type impurities (B: boron) are successively performed at very low concentrations to control the threshold voltages (Vthp and Vthn). More specifically, the Id-Vg characteristics of the p- and n-type TFTs are initially negatively shifted. In this state, non-selectively doping is performed positively to shift the p- and n-type TFTs first to adjust the Vthp to a specified value. Selectively doping is then performed positively to shift only the n-type TFT to adjust the Vthn to a specified value. The threshold voltages of the p- and n-type TFTs constructing the CMOS-TFT can be independently and efficiently (with minimum photolithography) controlled with high accuracy.
    Type: Grant
    Filed: September 17, 2003
    Date of Patent: March 29, 2005
    Assignee: Fujitsu Display Technologies Corporation
    Inventors: Hongyong Zhang, Makoto Igarashi
  • Patent number: 6873388
    Abstract: The invention relates to a substrate for a liquid crystal display that forms a part of a display of an information apparatus and a liquid crystal display having the same. The invention provides a substrate for a liquid crystal display which contributes to suppression of an increase in the number of manufacturing steps and an increase in a manufacturing cost and which improves the yield of manufacture, a liquid crystal display having the same, and a method of manufacturing the same.
    Type: Grant
    Filed: January 2, 2003
    Date of Patent: March 29, 2005
    Assignee: Fujitsu Display Technologies Corporation
    Inventors: Kouji Tsukao, Tsuyoshi Kamada, Teiji Majima
  • Patent number: 6873378
    Abstract: A liquid crystal display panel of the active matrix drive type is disclosed. Each pixel is provided with an storage capacitor, wherein capacitors for stabilizing the voltage are added to the common storage capacitor bus line that applies a predetermined potential to the storage capacitor bus lines provided for each of the rows to absorb noise that mixes into the storage capacitor bus lines through parasitic capacitances, thereby to decrease fluctuation in the voltage of the storage capacitor bus lines and to prevent the occurrence of display unevenness and crosstalk. Capacitors Ccs for stabilizing the voltage are added to a common storage capacitor bus line (vertical Cs line) 5 that applies a predetermined potential (storage capacitor bus line voltage Vcs) to the storage capacitor bus lines (horizontal Cs lines) 4 provided for each of the rows to form a common side of the storage capacitors Cs formed in each of the pixels.
    Type: Grant
    Filed: October 9, 2002
    Date of Patent: March 29, 2005
    Assignee: Fujitsu Display Technologies Corporation
    Inventor: Tsutomu Kai
  • Patent number: 6870594
    Abstract: A substrate is plotted into a plurality of blocks, and each block is plotted into one or a plurality of device-forming regions. By using a first manufacturing line, a conductive film, an insulating film and a semiconductor film which constitute TFT are formed in the device-forming region. Then, primary cutting is performed to cut the substrate into the respective blocks and form a plurality of sub-TFT substrates. Then, by using a second manufacturing line, processing is performed for each sub-TFT substrate in accordance with specifications of a liquid crystal panel to be manufactured. Then, secondary cutting is performed to cut the sub-TFT substrate into respective device-forming regions.
    Type: Grant
    Filed: January 25, 2000
    Date of Patent: March 22, 2005
    Assignee: Fujitsu Display Technologies Corporation
    Inventor: Hongyung Zhang
  • Patent number: 6870582
    Abstract: A liquid crystal display device includes first and second frame members, between which a light source device, a metal body supporting the light source device, a frame-like cover covering the peripheral region of the light source device, and a liquid crystal display element are held by the cover. The first frame member covers the peripheral region of the liquid crystal display element and has hooks for engagement with the recess in metal body. Therefore, the metal body, the light source device, the cover, the liquid crystal display element, and the first frame member are assembled and fastened together by the engagement of the hooks with the metal body. This assembly can be coupled to the second frame member. Straight metal members can be arranged between the first frame member and the driving ICs on the liquid crystal display element.
    Type: Grant
    Filed: May 13, 2002
    Date of Patent: March 22, 2005
    Assignee: Fujitsu Display Technologies Corporation
    Inventors: Seiji Hayashimoto, Takayuki Eiraku
  • Patent number: 6867824
    Abstract: A liquid crystal display unit having a liquid crystal display element is accommodated in a housing having an opening for exposing the display portion of the display element to the exterior. The housing comprises a display face cover and a rear cover and the liquid crystal display unit is mounted directly relative to the display face cover. A positioning pin is provided so as to extend out from the display face cover in order to position the liquid crystal display unit relative to the display face cover, and a positioning hole, which engages the positioning pin, is provided on the liquid crystal unit.
    Type: Grant
    Filed: May 16, 2002
    Date of Patent: March 15, 2005
    Assignee: Fujitsu Display Technologies Corporation
    Inventors: Takayuki Eiraku, Seiji Hayashimoto
  • Patent number: 6856373
    Abstract: A liquid crystal display apparatus includes a liquid crystal display unit, a plurality of data driving units which provide image data to said liquid crystal display unit, and a control unit which enables said plurality of data driving units to take in the image data simultaneously if the image data to be provided to said data driving units are identical.
    Type: Grant
    Filed: August 27, 2001
    Date of Patent: February 15, 2005
    Assignee: Fujitsu Display Technologies Corporation
    Inventors: Satoshi Sekido, Takae Ito, Shinpei Nagatani, Hidefumi Yoshida, Takashi Sasabayashi, Koichi Katagawa, Katsuhiko Kishida, Mikio Oshiro, Katsunori Tanaka, Toshimitsu Minemura, Katsuyoshi Hiraki, Yuichi Inoue
  • Patent number: 6856374
    Abstract: It is an object of the invention to provide a display and a method for repairing defects of the same in which defects such as inter-layer short-circuits and short-circuits in a single that have occurred at steps for manufacturing the display can be easily repaired to provide a good product with a probability higher than that in the related art. Laser irradiation is carried out as a first cycle of laser irradiation by forming a slit S1 in a region where a drain bus line 220 completely covers a gate bus line 218 to form a cut portion longer than the width of the gate bus line 218 adjacent to an inter-layer short-circuit 290 such that it splits an intersecting portion of the drain bus line 220 into two parts as shown in FIG. 5b. Next, as shown in FIG. 5c, slits S2 and S3 are respectively used for second and third cycles of laser irradiation to cut the drain bus line 220 at both ends of the cut portion (indicated by S1), thereby isolating the inter-layer short-circuit 290 of the drain bus line 220.
    Type: Grant
    Filed: July 27, 2000
    Date of Patent: February 15, 2005
    Assignee: Fujitsu Display Technologies Corporation
    Inventors: Kiyoshi Ozaki, Tsuyoshi Kamada, Kunio Matsubara, Shinya Katoh, Yoshihisa Taguchi, Katsushige Asada, Shogo Hayashi
  • Patent number: 6855954
    Abstract: The present invention relates to a thin film transistor, a fabrication method thereof and a liquid crystal display having the thin film transistor, and an object of the present invention is to provide a thin film transistor which improves a fabrication yield, a fabrication method thereof and a liquid crystal display having the thin film transistor.
    Type: Grant
    Filed: July 19, 2000
    Date of Patent: February 15, 2005
    Assignee: Fujitsu Display Technologies Corporation
    Inventor: Hong Yong Zhang
  • Patent number: 6853364
    Abstract: A liquid crystal display device includes a display circuit having data lines and scanning lines arranged in two-dimensional matrix, and switching elements connected between the data lines and the scanning lines. A first inspection circuit is also provided, including an inspection voltage input and/or output terminal for inputting and/or outputting an inspection voltage to/from one ends of the data lines via a first analog switch. A second inspection circuit includes an inspection voltage input and/or output terminal for inputting and/or outputting an inspection voltage to/from the other ends of the data lines. The display circuit, the first inspection circuit, and the second inspection circuit are provided on one substrate, and the first inspection circuit is constructed to be separated from the rest of the display circuit.
    Type: Grant
    Filed: December 18, 2001
    Date of Patent: February 8, 2005
    Assignee: Fujitsu Display Technologies Corporation
    Inventors: Tsutomu Kai, Susumu Okazaki, Hongyong Zhang, Noriyuki Ohashi
  • Patent number: 6847424
    Abstract: A liquid-crystal display includes a reflective liquid-crystal panel, a light guiding plate disposed on the reflective liquid-crystal panel, a polarizer arranged between a liquid-crystal layer of the reflective liquid-crystal panel and the light guiding plate, and a light source disposed on a side surface of the light guiding plate. Light emitted from the light source propagates through the light guiding plate and has a primary direction. A smaller one of two angles between a projection of the primary direction onto the reflective liquid-crystal panel and an absorption axis of the light guiding plate is at least 50°. This resultantly improves performance of the liquid-crystal display.
    Type: Grant
    Filed: August 23, 2001
    Date of Patent: January 25, 2005
    Assignee: Fujitsu Display Technologies Corporation
    Inventors: Takeshi Gotoh, Tetsuya Hamada, Tetsuya Kobayashi, Keiji Hayashi, Toshihiro Suzuki
  • Patent number: 6847422
    Abstract: A liquid crystal display device manufacturing method, including the steps of forming first-layer metal patterns in a display portion and a peripheral circuit portion of a first substrate; forming a first insulating film on the first-layer metal patterns; forming second-layer metal patterns on the first insulating film; and forming a color resin film on the second-layer metal patterns. The method also including the steps of patterning the color resin film to form color filters made of the color resin film in a pixel region of the display portion and to leave the color resin film in the peripheral circuit portion and forming a third-layer metal pattern on the color resin film in the peripheral circuit portion.
    Type: Grant
    Filed: December 18, 2002
    Date of Patent: January 25, 2005
    Assignee: Fujitsu Display Technologies Corporation
    Inventors: Hongyong Zhang, Seii Sato
  • Patent number: 6842214
    Abstract: There are contained a peripheral circuit portion B having first metal patterns formed on a first substrate, a first insulating film formed on the first metal patterns, a second metal pattern formed on the first insulating film, a second insulating film formed on the second metal pattern to have at least a first resin film, and third metal patterns formed on the second insulating film, and a display portion A having an active element formed on the first substrate and covered with the second insulating film and a second resin film, and a pixel electrode formed in a pixel region on the second insulating film and connected electrically to the active element via a hole that is formed in the second insulating film. Accordingly, the liquid crystal display device that has the display portion A and the peripheral circuit portion B is capable of reducing the capacitance between wirings and improving the throughput.
    Type: Grant
    Filed: March 28, 2002
    Date of Patent: January 11, 2005
    Assignee: Fujitsu Display Technologies Corporation
    Inventor: Hongyong Zhang
  • Publication number: 20050001973
    Abstract: The invention relates to a liquid crystal display in which a polymeric component included in a liquid crystal layer is polymerized while adjusting a voltage applied to the liquid crystal layer to regulate the direction of alignment of liquid crystal molecules during polymerization and a method of manufacturing the same. The invention provides a liquid crystal display in which image sticking is mitigated and a method of manufacturing the same. In a method of manufacturing a liquid crystal display in which a liquid crystal composition including a polymeric component that is optically or thermally polymerized is sealed between substrates and in which the polymeric component is polymerized while applying a voltage to the liquid crystal composition to regulate the direction of alignment of liquid crystal molecules during driving, a configuration is employed such that a polymerization initiator in the liquid crystal composition has a concentration x that satisfies 0?x?0.
    Type: Application
    Filed: July 15, 2004
    Publication date: January 6, 2005
    Applicant: Fujitsu Display Technologies Corporation
    Inventors: Yohei Nakanishi, Hiroyasu Inoue, Yuji Nakahata, Kengo Kanii, Kazutaka Hanaoka, Masakazu Shibasaki, Yuichi Inoue
  • Patent number: 6839118
    Abstract: The invention relates to a substrate for a liquid crystal display used as a display of an information apparatus, a liquid crystal display having the same, and a method of manufacturing the same and provides a substrate for a liquid crystal display on which the position of a defect can be easily detected to achieve high display quality, a liquid crystal display having the same, and a method of manufacturing the same.
    Type: Grant
    Filed: January 17, 2003
    Date of Patent: January 4, 2005
    Assignee: Fujitsu Display Technologies Corporation
    Inventor: Kenichi Nagaoka
  • Patent number: 6839104
    Abstract: A common electrode substrate has a transparent insulating substrate to be arranged opposite to an array substrate having pixel electrodes formed in respective pixel regions that are defined by a plurality of gate bus lines and drain bus lines. The substrate holds a liquid crystal having negative dielectric anisotropy. A common electrode is formed on the transparent insulating substrate; alignment regulating structures having linear protrusions are formed on the common electrode; and a light shield film is formed on the transparent insulating substrate with overlap regions that overlap the pixel electrodes when viewed in the direction perpendicular to a surface of the transparent insulating substrate, so as to shield, from light, alignment defective regions of the liquid crystal formed in regions of end portions of the pixel electrodes.
    Type: Grant
    Filed: August 6, 2001
    Date of Patent: January 4, 2005
    Assignee: Fujitsu Display Technologies Corporation
    Inventors: Yoji Taniguchi, Hiroyasu Inoue
  • Patent number: 6836308
    Abstract: A liquid crystal display device capable of obtaining high luminance and good display characteristics, a substrate for such a liquid crystal display device, and a manufacturing method of such a substrate, are provided. A color filter substrate holds, together with an array substrate, a liquid crystal having negative dielectric anisotropy. Color filters are formed on a glass substrate and a common electrode is formed on the color filters. Protrusions and auxiliary protrusions for regulating the alignment of the liquid crystal are formed on the common electrode so as to have different sectional shapes.
    Type: Grant
    Filed: August 16, 2001
    Date of Patent: December 28, 2004
    Assignee: Fujitsu Display Technologies Corporation
    Inventors: Manabu Sawasaki, Takashi Takagi, Tomonori Tanose
  • Patent number: 6833886
    Abstract: Since the drive data for display or their correction values are stored in correspondence with the combination of the upper bits of the current frame image data and the upper bits of the previous frame image data, the capacity of the high-speed memory circuit that stores the conversion table can be reduced. Accompanying the reduction in the capacity of the conversion table, since the precision of the display drive data or their correction values becomes lower, an interpolation circuit is provided and, by means of an interpolation calculation the display, drive data or their correction values having increased precision is generated and consequently the input image data is corrected to generate the display drive data.
    Type: Grant
    Filed: March 8, 2002
    Date of Patent: December 21, 2004
    Assignee: Fujitsu Display Technologies Corporation
    Inventors: Toshiaki Suzuki, Koshu Yonemura, Katsuyoshi Hiraki, Hiroshi Yamazaki, Katsunori Tanaka