Patents Examined by Timothy Rude
  • Patent number: 6870592
    Abstract: In a liquid-crystal display panel, columnar spacers are formed on a substrate on the transparent electrode side in minimally a part of the pixel parts of a plurality of pixel parts, in which there is little variation in the film thickness of a plurality of films formed over the substrate.
    Type: Grant
    Filed: June 16, 2000
    Date of Patent: March 22, 2005
    Assignee: NEC LCD Technologies, Ltd.
    Inventors: Yuji Yamamoto, Mamoru Okamoto, Michiaki Sakamoto, Takahiko Watanabe, Hirofumi Ihara, Hironori Kikkawa, Shinichi Nakata
  • Patent number: 6864937
    Abstract: A liquid crystal display device that uses in-plane switching is capable of eliminating a stain generated at an outer area of a thin film transistor array and minimizing a time delay of a common voltage applied to a thin film transistor array. In the device, a plurality of data lines apply data signals to a thin film transistor array. A plurality of gate lines apply gate signals to the thin film transistor array. A plurality of common voltage lines apply a common voltage to the thin film transistor array. The common voltage lines are provided at the outer area of the thin film transistor array and are spaced from the thin film transistor array by a distance of more than 1 to 1.5 mm. A plurality of dummy signal lines are arranged in parallel to the common voltage lines and adjacent to the common voltage lines provided at the outer area of the thin film transistor array to apply alternating current signals.
    Type: Grant
    Filed: June 28, 2001
    Date of Patent: March 8, 2005
    Assignee: LG.Philips LCD Co., Ltd.
    Inventors: Hong Man Moon, Sang Chul Park, Jae Young Chung
  • Patent number: 6859248
    Abstract: An in-plane switching type liquid crystal display device includes (a) a first substrate on which a plurality of gate lines and a plurality of data lines are formed such that the gate lines are substantially perpendicular to the data lines, and on which at least one pixel electrode and at least one common electrode are alternately formed in each of pixels defined by the gate and data lines, (b) a second substrate facing the first substrate, and (c) a liquid crystal layer sandwiched between the first and second substrates, wherein when a voltage is applied across the pixel electrode and the common electrode, liquid crystal existing on extensions of the data lines are caused to rotate in a plane substantially in parallel with the first substrate. Both the pixel electrode and the common electrode have at least one bending point at which the pixel electrode and the common electrode bend, and are designed to bend such that both an intensity and a direction of a field generated by the voltage successively vary.
    Type: Grant
    Filed: July 5, 2001
    Date of Patent: February 22, 2005
    Assignee: NEC LCD Technologies, Ltd.
    Inventors: Kimikazu Matsumoto, Shinichi Nishida
  • Patent number: 6850300
    Abstract: A multi-domain liquid crystal display device includes: first and second substrates; a plurality of gate lines on the first substrate in a first direction; a plurality of data lines formed in a second direction to cross the first direction; a plurality of thin film transistors formed in a portion where the gate lines cross the data lines; a plurality of pixel regions between neighboring gate and data lines; a common auxiliary electrode around each pixel region; a plurality of pixel electrodes formed in each pixel region to connect with the thin film transistor; dielectric structures on the second substrate, the dielectric structures being controlled electric field with the common auxiliary electrode and being divided the pixel region into at least four domains; at least one or more additional structures formed at an end portion of the dielectric structures within the pixel region; an alignment film on at least one of the first substrate and the second substrate; and a liquid crystal layer between the first sub
    Type: Grant
    Filed: December 29, 2000
    Date of Patent: February 1, 2005
    Assignee: LG Philips LCD Co., Ltd.
    Inventors: Joun Ho Lee, Doo Hyun Ko, Dong Ho Kang
  • Patent number: 6812978
    Abstract: A color filter substrate includes a substrate, a plurality of buffer layers respectively on the substrate, the plurality of buffer layers being spaced apart from adjacent buffer layers with an interval such that they have the shape of a matrix, a plurality of color filter layers on the buffer layers such that the plurality of color filter layers have the shape of matrix, each color filter layer having first and second portions, the first portion disposed in the gap between two adjacent buffer layers while the second portion is disposed on upper surfaces of the two adjacent buffer layers, the plurality of color filter layers being used for the transflective LCD device; and a common electrode on the plurality of color filter layers. In fabricating the color filter layer, the first and second portions of the color filter layer are integrally formed. Therefore, a simple fabricating process is achieved.
    Type: Grant
    Filed: February 28, 2001
    Date of Patent: November 2, 2004
    Assignee: LG.Philips LCD Co., Ltd.
    Inventors: Yong-Beom Kim, Jeong-Hwan Lee
  • Patent number: 6788358
    Abstract: A back light configured to have a high focusing ability is disclosed. In the unit, a light directs a light path of a light beam to the rear side thereof to obtain high focusing of the light beam. A light guide plate allows the light beam from the light input to progress in the vertical direction of a liquid crystal panel.
    Type: Grant
    Filed: October 6, 2000
    Date of Patent: September 7, 2004
    Assignee: LG. Philips LCD Co., Ltd.
    Inventors: Je Hong Kim, Seung Chul Lee
  • Patent number: 6765643
    Abstract: There is a liquid crystal display element capable of obtaining a good display performance which is not influenced by the deterioration with the time course and the history of applied voltage.
    Type: Grant
    Filed: December 20, 2000
    Date of Patent: July 20, 2004
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Rieko Fukushima, Kohki Takatoh
  • Patent number: 6762816
    Abstract: A liquid crystal display comprises an array substrate in which a common electrode, a pixel electrode, a scanning signal line, a video signal line and a semiconductor switching element are provided, an opposed substrate, and a liquid crystal layer interposed between the array substrate and opposed substrate. The line width of at least either the common electrode or the pixel electrode is larger than the distance between the common electrode and the pixel electrode. The film thickness of at least one of the common electrode and the pixel electrode is larger than the thickness of at least either the scanning signal line or the video signal line. As a result, an inplane electric field liquid crystal display having a wide viewing angle, high-speed response, and high image quality such as high luminance is provided.
    Type: Grant
    Filed: December 11, 2001
    Date of Patent: July 13, 2004
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hiroyuki Yamakita, Katsuhiko Kumagawa, Kazuo Inoue, Akinori Shiota, Ichiro Sato, Hiroshi Satani, Masanori Kimura, Satoshi Asada
  • Patent number: 6738112
    Abstract: A liquid crystal display device comprising: a first substrate (1) made of a transparent material, provided with signal electrodes and/or display electrodes (9) formed on one face thereof; a second substrate (2) made of a transparent material, provided with opposed electrodes (12) formed thereon; and liquid crystal sealed in-between the first substrate (1) and the second substrate (2) oppositely disposed opposite to each other with a predetermined gap interposed therebetween such that each of the signal electrodes or the display electrodes (9) face each of the opposed electrodes (12) so as to form a pixel. Further, a white diffusing film (22) and a reflector (25) are disposed in that order from of the first substrate (1) side on the second substrate (2).
    Type: Grant
    Filed: June 27, 2000
    Date of Patent: May 18, 2004
    Assignee: Citizen Watch Co., Ltd.
    Inventor: Kanetaka Sekiguchi
  • Patent number: 6717629
    Abstract: In a process for chamfering substrates constituting a liquid crystal display device, it is made possible to prevent a static electricity from generating in a chamfering amount mark used in order to perform a highly accurate chamfering, and improve a chamfering accuracy. There is provided a structure in which a chamfering amount mark 7 formed in an end portion of a 1st substrate is formed so as to be electrically connected to a short wiring 10, and a connection between the chamfering amount mark 7 and extension wirings 9 which are another conductive wirings is performed, thereby discharging the static electricity to another conductive pattern. Incidentally, there is adopted a structure in which plural mark patterns 8b constituting the chamfering amount mark 7 are intended to be electrically connected by a connecting wiring 8a and, additionally, the connecting wiring 8a is extended to a short wiring 10 side.
    Type: Grant
    Filed: October 30, 2002
    Date of Patent: April 6, 2004
    Assignee: Kabushiki Kaisha Advanced Display
    Inventors: Akinori Sumi, Ichiro Takasaki, Miyuki Hirosue
  • Patent number: 6697141
    Abstract: A liquid crystal display comprises an array substrate in which a common electrode, a pixel electrode, a scanning signal line, a video signal line and a semiconductor switching element are provided, an opposed substrate, and a liquid crystal layer interposed between the array substrate and opposed substrate. The line width of at least either the common electrode or the pixel electrode is larger than the distance between the common electrode and the pixel electrode. The film thickness of at least one of the common electrode and the pixel electrode is larger than the thickness of at least either the scanning signal line or the video signal line. As a result, an in-plane electric field liquid crystal display having a wide viewing angle, high-speed response, and high image quality such as high luminance is provided.
    Type: Grant
    Filed: June 4, 2002
    Date of Patent: February 24, 2004
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hiroyuki Yamakita, Katsuhiko Kumagawa, Kazuo Inoue, Akinori Shiota, Ichiro Sato, Hiroshi Satani, Masanori Kimura, Satoshi Asada
  • Patent number: 6683671
    Abstract: Spacers are provided on the counter substrate side. Each of the spacers in the display area is provided on a counter electrode that covers a color filter layer of a given thickness formed on a light shield layer formed on a glass substrate. A spacer in the peripheral area adjacent the display area is formed on a dummy color filter layer of the given thickness formed a light shield layer on the glass substrate. The thickness of the counter electrode is negligibly small in comparison with the thickness of the color filter layer. The uniformity of cell gap can be achieved over the display area and the peripheral area.
    Type: Grant
    Filed: July 7, 2000
    Date of Patent: January 27, 2004
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Hirokazu Morimoto
  • Patent number: 6650386
    Abstract: Featured is a liquid crystal display device including first and second transparent substrates and a liquid crystal layer interposed there between that includes a plurality of domains in each pixel region. Also included are first and second polarizing plates and first and second phase compensators; the fist compensator is provided between the first polarizing plate and first substrate and the second compensator is between the second polarizing plate and second substrate. The phase-delay axes for the first and second compensators are parallel to each other and substantially perpendicular to a phase-delay axis of the liquid crystal layer. A third phase difference compensator is provided between the first and/or second polarizing plate and the corresponding first or second compensator The three main axes (na,nb,nc) for the refractive index ellipse of the third compensator satisfies the relationship nc>na>nb.
    Type: Grant
    Filed: June 29, 1999
    Date of Patent: November 18, 2003
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Fumikazu Shimoshikiryoh
  • Patent number: 6642972
    Abstract: An array substrate for use in a liquid crystal display device is fabricated by the steps of forming a first metal layer on a substrate, patterning the first metal layer to form a gate line, a gate electrode, a gate pad, a first shorting bar, and a second shorting bar, forming a gate insulation layer, a pure amorphous silicon layer, a doped amorphous silicon layer and a second metal layer to cover the patterned first metal layer, patterning the second metal layer and the doped amorphous silicon layer to form first, second and third through-holes and first and second grooves to expose a portion of the pure amorphous silicon layer, the first and second grooves creating an isolated portions of the second metal layer, forming a passivation layer to cover the patterned second metal layer, forming a source electrode, a drain electrode, a data line, a data pad, an insulating segment, and first, second and third contact holes, and forming a pixel electrode, a first connector and a second connector of a transparent con
    Type: Grant
    Filed: June 28, 2001
    Date of Patent: November 4, 2003
    Assignee: LG. Philips LCD Co., Ltd.
    Inventors: Soon-Sung Yoo, Dong-Yeung Kwak, Hu-Sung Kim, Yu-Ho Jung, Yong-Wan Kim, Duk-Jin Park, Woo-Chae Lee
  • Patent number: 6639644
    Abstract: This invention has its object to provide a method of liquid display device production which enables spacer disposition in interelectrode spaces not having electrode, namely at black matrix sites, in STN type and TFT type liquid crystal display devices and further enables even spacer disposition to attain a uniform cell thickness all over the substrate to thereby produce liquid crystal display devices of high contrast and high display uniformity stably and in good yields, with a reduced spray step tact time, as well as liquid crystal display devices produced by such method.
    Type: Grant
    Filed: October 18, 2000
    Date of Patent: October 28, 2003
    Assignees: Sekisui Chemical Co., Ltd., Sharp Kabushiki Kaisha
    Inventors: Akihiko Tateno, Hiroyuki Nakatani, Kazuya Yoshimura, Makoto Nakahara, Takatoshi Kira, Daisuke Ikesugi, Masaki Ban, Hiroshi Murata, Masaaki Kubo
  • Patent number: 6600532
    Abstract: An object of the present invention is to provide a color filter for reliably preventing the liquid crystal layer from being contaminated with ionic materials, as well as a liquid crystal display excellent in display qualities. To achieve the object described above, the present invention provides a color filter comprises a substrate, a resin colored layer consisting of a plurality of colors formed in a predetermined pattern on the substrate, and a common transparent electrode layer, said resin colored layer bringing about a voltage holding ratio of 80% or more and a residual DC (&Dgr;E) of 0.5 V or less in a liquid crystal subjected to treatment for extraction of impurities.
    Type: Grant
    Filed: January 24, 2001
    Date of Patent: July 29, 2003
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Takehide Kishimoto, Hideaki Yamagata, Takashi Nishimoto
  • Patent number: 6600538
    Abstract: A liquid crystal display having in the display portion a transmission-type liquid crystal panel 1 comprising a nematic liquid crystal layer 2 having horizontal orientation and positive anisotropy of dielectric constant, a pair of transparent substrates 31, 32 having said liquid crystal layer 2 sandwiched therebetween and equipped with transparent electrodes, and a pair of polarizing plates 41, 42 arranged in cross-Nicol and having absorption axes each oriented differently from the direction of liquid crystal orientation, wherein said liquid crystal layer 2 includes two kinds of orientation regions each having a liquid crystal orientation direction that differ by approximately 180 degrees from the liquid crystal orientation direction of the other region, and further mounting a lens sheet 7 to the viewing surface side of said liquid crystal panel 1 for either scattering or refracting wider than its incident angle light ray stretched in the direction substantially parallel to the direction of liquid crystal orie
    Type: Grant
    Filed: May 24, 2000
    Date of Patent: July 29, 2003
    Inventors: Makoto Shiomi, Shigeaki Mizushima
  • Patent number: 6587172
    Abstract: A controlled angle retarder and method for making same is presented. In one embodiment, the invention is a liquid crystal display. The liquid crystal display includes a liquid crystal cell having an extraordinary axis. The liquid crystal display also includes a first retarder connected to the liquid crystal cell, the first retarder having an extraordinary axis. The extraordinary axis of the first retarder is aligned at an angle to the extraordinary axis of the liquid crystal cell. This angle is sufficient to produce a desired effective retardance of the first retarder within the display different from a specified retardance of the first retarder.
    Type: Grant
    Filed: May 3, 2000
    Date of Patent: July 1, 2003
    Assignee: Three-Five Systems, Inc.
    Inventor: Douglas McKnight
  • Patent number: 6545738
    Abstract: A liquid crystal display device and a method for fabricating a liquid crystal display device wherein two domains are provided within each pixel cell so as to prevent flicker and to widen a viewing angle. In the liquid crystal display device, a common electrode is formed on a first substrate in such a manner to be divided into at least two electrodes. An alignment film is coated on the first substrate provided with the common electrode and a second substrate. A ferroelectric liquid crystal layer is injected between the first substrate and the second substrate to form at least two domains having a liquid crystal alignment state opposed to each other on a basis of a dividing line of the common electrode.
    Type: Grant
    Filed: June 29, 2001
    Date of Patent: April 8, 2003
    Assignee: LG.Philips LCD Co., Ltd.
    Inventors: Hyeon Ho Son, Su Seok Choi, Jong Jin Park
  • Patent number: 6532050
    Abstract: The liquid crystal display includes first and second disposed substrates spaced apart from each other and having a gap therebetween. A liquid crystal is in the gap, and a color filter is formed on the second substrate. A switching element is formed over the color filter such that the liquid crystal is disposed between the first substrate and the switching element.
    Type: Grant
    Filed: July 7, 2000
    Date of Patent: March 11, 2003
    Assignee: LG. Philips CD Co., Ltd.
    Inventors: Woong-Kwon Kim, Jeong-Hyun Kim