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    LIQUID CRYSTAL DISPLAY DEVICE
    1.
    发明专利
    LIQUID CRYSTAL DISPLAY DEVICE 未知

    公开(公告)号：CA2094522A1

    公开(公告)日：1993-10-23

    申请号：CA2094522

    申请日：1993-04-21

    Applicant: IBM

    Inventor： KOSEKI TOSHIHIKO ,  FUKUNAGA TETSUYA ,  TAKANO HIDEO ,  YAMANAKA HIDEMINE

    IPC: G02F1/1335 ,  G02F1/1337 ,  G02F1/1343 ,  G02F1/136 ,  G02F1/1368 ,  H01L21/336 ,  H01L27/12 ,  H01L29/78 ,  H01L29/786 ,  G02F1/133

    Abstract: JA9-91-044 LIQUID CRYSTAL DISPLAY DEVICE A liquid crystal display device includes a first transparent insulating substrate having a common electrode. A second transparent insulating substrate has gate lines formed in one direction and intersecting data lines in the other direction. Liquid crystal display cells are formed at each cross-point of the gate and data lines and include thin film transistors and display electrodes; a light shielding layer includes an aperture for exposing a display area of each display electrode and liquid crystal material retained between the first and second substrates. The device is characterized in that the light shielding layer of edge of the aperture located at the upper stream of a rubbing direction comprises a thin light shielding layer formed at the periphery of the display electrode for defining edge of the aperture and, a thick light shielding layerhaving an edge positioned on the thin light shielding layer. The present invention improves the quality of a displayed image of a liquid crystal display device which has been degraded by a reverse tilt.

    LIQUID CRYSTAL DISPLAY
    3.
    发明专利
    LIQUID CRYSTAL DISPLAY 未知

    公开(公告)号：CA2053345A1

    公开(公告)日：1992-04-16

    申请号：CA2053345

    申请日：1991-10-11

    Applicant: IBM

    Inventor： TAKANO HIDEO

    IPC: G02F1/1337 ,  G02F1/139 ,  G09F9/35 ,  G02F1/137

    Abstract: The specification describes a liquid crystal panel for a twisted nematic liquid crystal that provides the best angle of view in a normal direction to the plane of a glass substrate. Each liquid crystal cell representing a pixel is divided up into two domains, a positive tilt and negative tilt domain. The relationship of the positive tilt and negative tilt domains is equalized in order to orient the molecules in the middle of the cross section of a cell with the desired neutral tilt. The positive and negative tilts are produced by the process of adding a chiral dopant to the liquid crystal, or by a bias-rubbing process, or a combination of both processes. A further characteristic of the panel is that angle of view is symmetric in the vertical

    METHOD FOR DRIVING LCD AND APPARATUS FOR DRIVING LCD AND LCD APPARATUS
    4.
    发明专利
    METHOD FOR DRIVING LCD AND APPARATUS FOR DRIVING LCD AND LCD APPARATUS 未知

    公开(公告)号：CA2065981A1

    公开(公告)日：1992-11-16

    申请号：CA2065981

    申请日：1992-04-14

    Applicant: IBM

    Inventor： IKEZAKI MITSURU ,  SUZUKI SHUNJI ,  TAKANO HIDEO

    IPC: G02F1/133 ,  G09G3/20 ,  G09G3/36

    Abstract: JA9-91-007 METHOD FOR DRIVING LCD AND APPARATUS FOR DRIVING LCD AND LCD APPARATUS To provide a liquid crystal display apparatus that simultaneously satisfies both good contrast ratios and good gradation at large viewing angles. A liquid crystal display apparatus in normally-white mode in which gray scale displaying is obtained by providing different applied voltages corresponding to different gray scale levels, respectively, is characterized in that, in a curve showing the relation between an applied voltage and light transmittance ( V-T curve ) the lowest applied voltage is set so as to be shifted in the direction of a monotonously decreasing area of the V-T curve. By shifting the lowest applied voltage in the V-T curve in the direction of a monotonously decreasing area of the V-T curve, brightness or gradation is prevented from being inverted. A liquid crystal display apparatus in normally-white mode in which gray scale displaying is obtained by providing different applied voltages corresponding to different gray scale levels, respectively, characterized in that in a curve showing the relation between the an applied voltage and light transmittance (thereafter called V-T curve) the lowest applied voltage is set so as to be shifted in the direction of a monotonously decreasing area of the V-T curve. By shifting the lowest applied voltage in the V-T curve in the direction of a monotonously decreasing area of the V-T curve, brightness or gradation is prevented from being inverted.

    7.
    发明专利
    未知

    公开(公告)号：DE69115837D1

    公开(公告)日：1996-02-08

    申请号：DE69115837

    申请日：1991-10-14

    Applicant: IBM

    Inventor： TAKANO HIDEO

    IPC: G02F1/1337 ,  G02F1/139 ,  G02F1/137

    Abstract: The invention relates to a twisted nematic liquid crystal display which has the best viewing angle at a position directly opposite to the display panel. A single pixel of the display panel comprises a normal tilt domain and a reverse tilt domain of molecules of the liquid crystal. In a preferred embodiment the size of the normal tilt domain is equal to that of the reverse tilt domain.

    LIQUID CRYSTAL DISPLAY DEVICE
    9.
    发明专利
    LIQUID CRYSTAL DISPLAY DEVICE 未知

    公开(公告)号：MY129875A

    公开(公告)日：2007-05-31

    申请号：MYPI9300694

    申请日：1993-04-16

    Applicant: IBM

    Inventor： KOSEKI TOSHIHIKO ,  FUKUNAGA TETSUYA ,  TAKANO HIDEO ,  YAMANAKA HIDEMINE

    Abstract: IN A LIQUID CRYSTAL DISPLAY DEVICE INCLUDING A FORST TRANSPARENT INSULATING SUBSTRATE HAVING A COMMON ELECTRODE FORMED THERON; A SECOND TRANSPARENT INSULATING SUBSTRATE HAVING GATE LINES (II) FORMED IN A FIRST DIRECTION; DATA LINES (10) FORMED IN A SECOND DIRECTION SO AS TO INTERSECT SAID GATE LINES, LIQUID CRYSTAL DISPLAY CELLS, EACH AT A CROSSPOINT OF SAID GATE AND DATA LINES; THE CELLS HAVING A THIN FILM TRANSISTOR AND A DISPLAY ELECTRODE (3); A LIGHT SHIELDING LAYER HAVING AN APERTURE FOR EXPOSING A DISPLAY AREA OF EACH DISPLAY ELECTRODE; A LIQUID CRYSTAL MATERIAL RETAINED BETWEEN SAID FIRST AND SECOND SUBSTRATES, AND A LIQUID CRYSTAL ORIENTATING LAYER ON AT LEAST ONE OF THE SUBSTRATES, THE IMPROVEMENT COMPRISING, THE LIGHT SHIELDING LAYER AT AN EDGE OF SAID APERTURE BEING LOCATED IN AN UP STREAM DIRECTION WITH RESPECT TO A RUBBING DIRECTION OF THE ORIENTATING LAYER OF THE SUBSTRATE, COMPRISING A THIN LIGHT SHIELDING LAYER (5) FORMED AT A PERIPHERY OF THE DISPLAY ELECTRODE FOR DEFINING AN EDGE OF THE APERTURE, AND A THICK LIGHT SHIELDING LAYER (4) HAVING AN EDGE POSITIONED ON THE THIN LIGHT SHIELDING LAYER.

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