Patents Examined by P. R. Akkapeddi
  • Patent number: 6798489
    Abstract: A liquid crystal display includes a bottom substrate with a gate wire, a data wire and thin transistor, and a top substrate with color filters. In a method for fabricating the liquid crystal display, a pixel electrode is formed on the bottom substrate at each pixel area using a first mask such that the pixel electrode has a first region with a smooth surface, and a second region with a rough surface. A common electrode is formed on the top substrate using a second mask such that the common electrode has a first region with a smooth surface, and a second region with a rough surface. The bottom substrate and the top substrate are assembled together, and a liquid crystal is injected between the bottom and the top substrates.
    Type: Grant
    Filed: November 4, 2003
    Date of Patent: September 28, 2004
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jeong-Ho Lee, Young-Bae Park, Jeong-Young Lee
  • Patent number: 6795155
    Abstract: The invention provides a liquid crystal device capable of obtaining a bright image with a high display quality by controlling disclination caused by a lateral electric field developed across a space between pixels, or the like.
    Type: Grant
    Filed: November 21, 2003
    Date of Patent: September 21, 2004
    Assignee: Seiko Epson Corporation
    Inventor: Kinya Ozawa
  • Patent number: 6795134
    Abstract: An upper substrate of a liquid crystal display device includes a color filter and a black matrix. A lower substrate includes a gate insulating layer formed of the substrate, a data line formed on the gate insulating layer, a light shielding pattern formed on the gate insulating layer and spaced apart from the data line, a passivation film formed on the data line and the light shielding pattern, a pixel electrode formed on the passivation film and overlapping a portion of the light shielding pattern. The light shielding pattern includes two light shielding lines formed parallel to and on either side of the data line. Such an arrangement reduces a parasitic capacitance between the pixel electrode and the data line, while maintaining a high aperture ratio.
    Type: Grant
    Filed: March 4, 2003
    Date of Patent: September 21, 2004
    Assignee: LG. Philips LCD Co., Ltd.
    Inventor: In-Duk Song
  • Patent number: 6791659
    Abstract: An apparatus and method for fabricating a liquid crystal display that is capable of shortening a liquid crystal exhaust time in a liquid crystal injection and sealing process to improve the productivity of the liquid crystal display. In the apparatus and method, a heater heats a high-pressure air pressurizing the upper plate and the lower plate of the liquid crystal display panel to heat and pressurize the upper plate and the lower plate of the liquid crystal display panel. Accordingly, the liquid crystal is heated when it is exhausted by the pressurization to have a low viscosity, so that a liquid crystal exhaust time can be shorted to improve the productivity of the liquid crystal display.
    Type: Grant
    Filed: November 13, 2003
    Date of Patent: September 14, 2004
    Assignee: LG. Philips LCD Co., Ltd.
    Inventor: Choul Min Choi
  • Patent number: 6788377
    Abstract: A liquid crystal device is provided including an exit side substrate portion, an entrance side substrate portion opposed to the exit side substrate portion, and a liquid crystal layer placed between the exit side substrate portion and the entrance side substrate portion. The exit side substrate portion includes an exit side substrate on which a first electrode for driving the liquid crystal layer is formed, and an exit side cover arranged on the exit side with respect to the exit side substrate. The entrance side substrate portion includes an entrance side substrate on which a second electrode for driving the liquid crystal layer is formed, and an entrance side cover arranged on the entrance side with respect to the entrance side substrate. The absolute value of the coefficient of thermal expansion of the exit side cover is less than 37×10−7/° C., and more preferably not more than 10×10−7/° C.
    Type: Grant
    Filed: June 21, 2000
    Date of Patent: September 7, 2004
    Assignee: Seiko Epson Corporation
    Inventors: Yasunori Ogawa, Takeshi Takezawa, Osamu Okumura
  • Patent number: 6788355
    Abstract: A method for fabricating an active matrix LCD panel for use in an active matrix LCD device includes the step of forming a passivation layer acting as a channel protection layer for protecting an amorphous silicon active layer, thereby reducing the number of photolithographic steps. A transparent conductive film is used for forming a gate electrode and a pixel electrode before formation of an amorphous silicon film for the TFTs.
    Type: Grant
    Filed: October 25, 2000
    Date of Patent: September 7, 2004
    Assignee: NEC LCD Technologies, Ltd.
    Inventors: Satoshi Ihida, Hirotaka Yamaguchi, Hiroaki Tanaka, Takasuke Hayase, Hiroshi Kanou, Wakahiko Kaneko, Tae Miyahara, Michiaki Sakamoto, Shinichi Nakata
  • Patent number: 6784969
    Abstract: Liquid crystal material is introduced into a liquid crystal panel having upper and lower substrates and a seal pattern having an injection port at a peripheral portion thereof including, preparing an open portion that elongates from the injection port to a side of the lower substrate. The liquid crystal material is in a tray having a protruded portion corresponding in shape to the open portion. The protruded portion of the tray is inserted into the injection port, so that the liquid crystal material in the tray can be injected into the panel through the protruded portion and the injection port. After the injection process, there is no need to clean the panel, because liquid crystal material does not contaminate the outside of the panel.
    Type: Grant
    Filed: November 17, 2000
    Date of Patent: August 31, 2004
    Assignee: LG. Philips LCD Co., Ltd
    Inventor: Joo-Soo Lim
  • Patent number: 6781650
    Abstract: Incident light from the space between the light-reflecting films in a liquid crystal light valve of a liquid crystal display device, especially in a reflection-type liquid crystal light valve of a projection-type liquid crystal display device is effectively blocked. The liquid crystal light valve having a semiconductor substrate, a counter substrate, light-reflecting films, and liquid crystal comprises a light-blocking layer and light shields formed between the light-blocking layer and the light-reflecting films.
    Type: Grant
    Filed: September 14, 2000
    Date of Patent: August 24, 2004
    Assignee: International Business Machines Corporation
    Inventors: Evan George Colgan, Masami Shinohara, Mitsuru Uda
  • Patent number: 6778249
    Abstract: In a liquid-crystal display element each individual liquid-crystal injection area surrounded by a seal, and the overall liquid-crystal injection area is surrounded by an array substrate and an opposing substrate surrounded by an outer peripheral seal having an aperture and are adhered together, the aperture of the outer peripheral seal being sealed by a hole sealant, and the surface of at least one of the array substrate and the opposing substrate being polished with a polishing material, which is then removed, after which cutting along the aperture is done to separate the individual liquid-crystal injection areas, thereby facilitating the achievement of a thin liquid-crystal display element, while improving the quality and yield thereof.
    Type: Grant
    Filed: July 21, 2000
    Date of Patent: August 17, 2004
    Assignee: NEC LCD Technologies, Ltd.
    Inventors: Hirofumi Kamosawa, Takeya Shimizu
  • Patent number: 6778234
    Abstract: A liquid crystal display including a liquid crystal panel and a backlight. The liquid crystal panel has a front plate and a rear plate between which liquid crystal is interposed, wherein electrodes for driving the liquid crystal on a pixel-by-pixel basis, pixel electrodes corresponding to the common electrodes, and thin film transistors (TFTs) for driving the pixel electrodes are installed on the inner surface of each of the front and rear plates. The backlight has a front plate and a rear plate, wherein a plurality of R, G and B anode electrodes, on which fluorescent layers are formed, are formed in parallel on the front plate, cathode electrodes corresponding to the anode electrodes are formed on the rear plate, and light emitting units for colors according to the anode electrodes and the cathode electrodes are installed to provide light of each of R, G and B colors to each pixel of the liquid crystal panel.
    Type: Grant
    Filed: April 5, 2001
    Date of Patent: August 17, 2004
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Kwan-sun Park, Jae-eun Jang
  • Patent number: 6768525
    Abstract: A color, transmissive LCD is described herein which uses red, green, and blue LEDs as the light source. The R, G, and B LEDs are coupled to separate light guides, one light guide for each color. These light guides may take the form of three overlying plastic or glass sheets. In another embodiment, thin fiber optic cables arranged parallel to each other on a supporting surface are used as the light guides, and each fiber optic cable is optically coupled to only one R, G, or B LED in a repeating pattern. The light guides contain deformities to emit light coinciding with the positions of the red, green, and blue pixels. The R, G, and B LEDs are constantly on, and there is no color filtering.
    Type: Grant
    Filed: December 1, 2000
    Date of Patent: July 27, 2004
    Assignee: Lumileds Lighting U.S. LLC
    Inventors: Steven Paolini, Gerard Harbers, Wayne L. Snyder
  • Patent number: 6757047
    Abstract: A liquid crystal display device has data signal lines consisting of recurrently formed first, second, and third lines that have open ends and are used for data entry, first diodes formed on the first lines, and second diodes formed on the second lines and having an opposite polarity to the first diodes. In this liquid crystal display device, a test for uneven display of colors is conducted by putting a short-circuiting bar for supplying testing voltages to the data signal lines in contact with the data signal lines.
    Type: Grant
    Filed: April 30, 2001
    Date of Patent: June 29, 2004
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Tomohiro Amano
  • Patent number: 6750941
    Abstract: A complex diffraction device, which is excellent in designability, easy in setting the diffraction angle, adaptable to size increase, and easy to handle by adding a diffraction function resulting from an uneven pattern to the diffraction device comprising a liquid crystalline layer where the helical orientation of the smectic liquid crystal phase having a helical structure is maintained.
    Type: Grant
    Filed: March 22, 2002
    Date of Patent: June 15, 2004
    Assignee: Nippon Mitsubishi Oil Corporation
    Inventors: Yasushi Satoh, Yoshihiro Kumagai, Takehiro Toyooka
  • Patent number: 6741298
    Abstract: An LCD monitor for a computer includes an LCD module, a front frame and a rear main frame, where the front frame has a vertical flange portion corresponding to sides of the LCD module. A bracket is provided and has a vertical coupling portion for coupling to the flange of the front frame. A monitor case is provided for encasing the LCD module. A horizontal coupling portion is provided for coupling to the rear main frame such that the front frame, rear main frame and the monitor case are all coupled together using a novel side-mounting technique.
    Type: Grant
    Filed: January 11, 2000
    Date of Patent: May 25, 2004
    Assignee: LG. Philips LCD Co., Ltd.
    Inventor: Se Chang Won
  • Patent number: 6738120
    Abstract: A liquid crystal display includes a first insulating substrate with a top surface and a bottom surface. A pixel electrode is formed on the top surface of the first insulating substrate. The pixel electrode has a first opening pattern at each pixel area. A second insulating substrate is arranged parallel to the first insulating substrate. A common electrode is formed on the bottom surface of the second insulating substrate. The common electrode has a second opening pattern at each pixel area, which correspond to each pixel area of the pixel electrode. A liquid crystal layer is sandwiched between the first substrate and the second substrate. The openings of the first opening pattern and the second opening pattern being alternately arranged parallel to each other.
    Type: Grant
    Filed: October 2, 2000
    Date of Patent: May 18, 2004
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jang-Kun Song, Jae-Jin Ryu
  • Patent number: 6731366
    Abstract: Liquid crystal display (LCD) structures and methods for forming the same. The black matrix and the color filter layer of the LCD are moved from color filter substrate to TFT substrate to form a color filter on TFT (COT) structure. Besides, the spacers are composed of photoresist or color photoresist can be located on portions of areas covered by the black matrix to maximize the aperture ratio.
    Type: Grant
    Filed: October 25, 2000
    Date of Patent: May 4, 2004
    Assignee: Allied Material Technology Corp.
    Inventors: Dong-Yuan Goang, Chich-Jung Wu, Dou-I Chen
  • Patent number: 6724457
    Abstract: A liquid crystal display device comprises a first substrate, a columnar spacer formed on the first substrate and exhibiting light shielding properties, an alignment film formed to covet at least a part of the columnar spacer, a second substrate arranged to face the first substrate with a predetermined gap provided by the columnar spacer between the first and second substrates, and a liquid crystal material arranged within the gap. The columnar spacer is tapered in the forward direction as viewed from the first substrate in that portion of the columnar spacer which is positioned closest to the second substrate and has the largest diameter portion in the region other than that region of the columnar spacer which is positioned closest to the first substrate.
    Type: Grant
    Filed: November 9, 2000
    Date of Patent: April 20, 2004
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Kazuyuki Sunohara, Atsuyuki Manabe, Hiroyuki Nagata, Natsuko Maya, Akiko Toriyama
  • Patent number: 6724448
    Abstract: When transparent substrates 110 and 120 are compression-bonded via a sealing member 130, conductive particles 132 formed to be slightly larger break through relatively soft alignment layers 113 and 123 to become in contact with both inner end portions 111c and outer end portions 121c, and in this state, the sealing member 130 is cured.
    Type: Grant
    Filed: December 20, 2000
    Date of Patent: April 20, 2004
    Assignee: Seiko Epson Corporation
    Inventor: Hiroki Nakahara
  • Patent number: 6717635
    Abstract: A liquid crystal display device having a light guide plate and a light source disposed on one of side surfaces of the light guide plate so that external light is transmitted through the light guide plate and enters a liquid-crystal display portion. A plurality of dots each constituted by a small recess or protrusion portion reflecting light from the light source toward the liquid crystal display portion are formed in or on another surface of the light guide plate opposite to the liquid crystal display portion. Each of the dots have a substantially V-shape in section with an inclination angle of the section being in a range of 35° to 43°.
    Type: Grant
    Filed: September 10, 2002
    Date of Patent: April 6, 2004
    Assignees: Hitachi, Ltd., Nitto Denko Corporation
    Inventors: Hitoshi Taniguchi, Yasuo Hira, Toshihiko Ariyoshi, Seiji Umemoto
  • Patent number: 6714266
    Abstract: In a transmission type liquid crystal display device, a semiconductor thin film is formed for each pixel below a signal wiring, a gate wiring, an auxiliary capacitance wiring and a lead electrode which are made of a light shading material via an insulating film. A region that belongs to the semiconductor thin film and is located below the signal wiring and below the gate wiring is made to serve as a channel region of a TFT. Regions that belong to the semiconductor thin film and are located on both sides of the channel region below the signal wiring are made to serve as a source region and a drain region of the TFT, respectively. Further, a region that belongs to the semiconductor thin film and is located below the auxiliary capacitance wiring is made to serve as an auxiliary capacitance electrode region.
    Type: Grant
    Filed: August 3, 2000
    Date of Patent: March 30, 2004
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Tohru Ueda, Yoshinori Higami