Patents Assigned to NEC LCD Technologies
  • Patent number: 6636281
    Abstract: In a flat panel display device, in which a display panel 1 loosely fitted on a main surface of a chassis 4 and circuit substrates held in hook portions provided on side surfaces of the chassis are connected each other through TCP's by bending the latter TCP's, and a method for manufacturing the same device, a main slit for a rounded portion of each TCP is formed in a rounded portion of the TCP and an auxiliary sub slit is also formed adjacent to the main slit. In order to reduce the peeling force exerted on connecting/fixing portions between the TCP's and the display panel, the circuit substrate is pulled up by bending the main and sub slits and then returning the sub slit to a flat state to insert the circuit substrate into the hook portions.
    Type: Grant
    Filed: July 11, 2000
    Date of Patent: October 21, 2003
    Assignee: NEC LCD Technologies, Ltd.
    Inventor: Tsutomu Kanatsu
  • Patent number: 6633002
    Abstract: A tape carrier with high density wiring patterns and having high flexibility, a tape carrier package using such tape carrier, and a method of manufacturing them. The tape carrier has a base film made of an insulating material and having wiring patterns formed thereon. The tape carrier also has a bending area for bending the tape carrier therein. In the bending hole region, a plurality of round holes are formed regularly. Diameter of each of the holes is larger than a space between the wiring patterns in the bending area. Preferably, the centers of the holes are located at grid points of an assumed predetermined grid and at the intersections of diagonal lines connecting the grid points. Also, the center of each of the plurality of holes is located on the center line of a space between adjacent wiring patterns in the bending area.
    Type: Grant
    Filed: May 19, 2000
    Date of Patent: October 14, 2003
    Assignee: NEC LCD Technologies, Ltd.
    Inventor: Noriaki Atou
  • Patent number: 6633361
    Abstract: A LCD display device includes a LCD panel unit and a LCD driver (TCP) for driving the LCD panel unit. The panel terminals of the signal lines are bonded to respective TCP leads of the LCD driver. The panel terminal has a slit therein for inspection of the alignment of the panel terminal and the TCP lead. If the alignment is achieved, light does not pass the slit whereas if the alignment is incomplete, light passes the slit, whereby the misalignment is detected by human eyes.
    Type: Grant
    Filed: June 2, 2000
    Date of Patent: October 14, 2003
    Assignee: NEC LCD Technologies, Ltd.
    Inventor: Akira Fujita
  • Patent number: 6633349
    Abstract: A projection type liquid crystal display unit includes (a) a first frame (13) having a first surface (15) formed with a first opening (13a), (b) a second frame (12) having a second surface formed with a second opening (12a), and (c) a liquid crystal display panel (11) sandwiched between the first and second frames (13, 12) such that an incident light passes through the second opening (12a), the liquid crystal display panel (11) and the first opening (13a) in this order. The first and second frames (13, 12) are both composed of resin, and the first surface (15) of the first frame (13) is roughened.
    Type: Grant
    Filed: February 2, 2001
    Date of Patent: October 14, 2003
    Assignees: NEC Corporation, NEC LCD Technologies, Ltd.
    Inventor: Fumihiko Fujishiro
  • Patent number: 6630783
    Abstract: An electroluminescent panel has a light emitting body sealed in an inner space between transparent package films, and the light emitting body includes a fluorescent layer, a transparent electrode formed on one surface of the fluorescent layer and formed of indium tin oxide and a back electrode formed on the other surface of the fluorescent layer and formed of aluminum, wherein the light emitting body is folded down so that a non-transparent conductive layer of silver is patterned on the transparent electrode of the folded portion, thereby enhancing the uniformity of brightness by virtue of the light radiated from the folded portion.
    Type: Grant
    Filed: August 16, 2000
    Date of Patent: October 7, 2003
    Assignee: NEC LCD Technologies, Ltd.
    Inventor: Shinichirou Ono
  • Patent number: 6628262
    Abstract: An active matrix type display apparatus includes a display panel, a horizontal display driver and a controller. The horizontal display driver includes m (m is an integer larger than 1) horizontal driving sections to drive the display panel based on m display data sets in response to an output clock signal, respectively. The controller generates the output clock signal from an input clock signal, and carries out sampling of input data to produce display data for a horizontal line of the display panel. Also, the controller sequentially stores the display data and outputs the stored display data to the m horizontal driving sections in units of display data sets in response to the output clock signal, respectively.
    Type: Grant
    Filed: December 6, 2000
    Date of Patent: September 30, 2003
    Assignee: NEC LCD Technologies, Ltd.
    Inventor: Tsuyoshi Ichiraku
  • Patent number: 6628256
    Abstract: The present specification discloses a drive circuit of a liquid crystal display device that transfers image data to a liquid crystal panel which is able to reduce the amount of change of the value of each bit of data that may be transferred over a bus line. In the case the number of data signals that cause a polarity change in the output to a bus line is equal to or greater than the majority of data signals for each of four output ports, a controller inverts the polarity of the data signals, and outputs data from each output port to the bus line. In addition, the controller outputs polarity inversion signals, which indicate that the polarity of data signals output to the bus line has been inverted, for each output port.
    Type: Grant
    Filed: December 1, 2000
    Date of Patent: September 30, 2003
    Assignee: NEC LCD Technologies, Ltd.
    Inventor: Mitsuhisa Nishimura
  • Patent number: 6624801
    Abstract: A display apparatus includes a plurality of scanning lines to which a plurality of scanning signals are inputted, respectively and a plurality of signal lines to which a plurality of display signals are inputted, respectively and a plurality of capacitance sections respectively provided through a plurality of switching elements at a plurality of intersections of the plurality of scanning lines and the plurality of signal lines, and a display section including the plurality of capacitance sections. The display section is divided into first and second display regions by a virtual line parallel to at least one of the plurality of scanning lines. The plurality of scanning signals are inputted at first intervals to a first group of the scanning lines corresponding to the first display region of the plurality of scanning lines.
    Type: Grant
    Filed: February 26, 2001
    Date of Patent: September 23, 2003
    Assignee: NEC LCD Technologies, Ltd.
    Inventor: Hiroaki Moriyama
  • Patent number: 6624866
    Abstract: An active matrix type of a liquid crystal display apparatus, includes a pair of substrates, a liquid crystal layer and a pixel electrode and a common electrode and a transparent auxiliary electrode. The liquid crystal layer is provided between the pair of substrates. The pixel electrode and the common electrode are provided on at least one side of the pair of substrates. The pixel electrode and the common electrode are provided at established intervals to be shaped like teeth of a comb to generate an electric field substantially parallel to the pair of substrates in the liquid crystal layer. The transparent auxiliary electrode is provided through an insulating film above the common electrode. The same voltage as that of the common electrode is applied to the transparent auxiliary electrode such that the electric field applied to the liquid crystal layer is strengthened.
    Type: Grant
    Filed: May 21, 2001
    Date of Patent: September 23, 2003
    Assignee: NEC LCD Technologies, Ltd.
    Inventor: Kimikazu Matsumoto
  • Patent number: 6621551
    Abstract: A liquid crystal display panel is placed on a fixed base and an anisotropic film is set in a position relative to the orientation layer of the display panel. Linearly polarized light is directed to the panel and the anisotropic film and light passing through them are detected. According to the intensity of the detected light, the angle of orientation of the anisotropic film is adjusted relative to the orientation layer. Angular misalignment, which may exist between the anisotropic film and the orientation layer, is minimized.
    Type: Grant
    Filed: June 27, 2001
    Date of Patent: September 16, 2003
    Assignee: NEC LCD Technologies, Ltd.
    Inventor: Tadashi Matsuzawa
  • Patent number: 6618109
    Abstract: A liquid crystal display apparatus has a pair of substrates opposing to each other and a liquid crystals sandwiched between the pair of substrates. One side of substrate is provided with gate lines and signal lines which approximately cross each other. TFTs are provided close to intersection portion of the gate line and the signal line. Pixel electrodes and common electrodes are provided at each pixel enclosed by the gate line and the signal line. Each of pixel electrodes and common electrodes has bent points more than one and is alternately formed in parallel with each other. Both the pixel electrode and the common electrode are made up of bent sections and projected sections projecting toward concave sections of opposite electrodes from convex side top sections of the bent sections.
    Type: Grant
    Filed: July 27, 2001
    Date of Patent: September 9, 2003
    Assignee: NEC LCD Technologies, Ltd.
    Inventors: Masanobu Hidehira, Makoto Watanabe, Syouichi Kuroha
  • Patent number: 6617263
    Abstract: An organic film is coated on an insulating substrate and an organic solvent is infiltrated into the organic film to cause dissolution of the organic film to flatten the organic film. Thereafter, the flattened organic film is subjected to heat treatment at temperatures of 100 to 180° C. to evaporate the organic solvent included in the organic film. Evaporating the organic solvent included in the organic film at relatively low temperatures, i.e., temperatures of 100 to 180° C. makes it possible to reduce thermal stress on a wiring layer covered by the organic film and provide flatness of the surface of the insulating substrate.
    Type: Grant
    Filed: July 8, 2002
    Date of Patent: September 9, 2003
    Assignee: NEC LCD Technologies, Ltd.
    Inventor: Shusaku Kido
  • Patent number: 6611092
    Abstract: A flat fluorescent lamp is provided with one or more protrusions at the periphery thereof, which protrusion(s) extends outwardly beyond the edges of the two glass plates. A lamp holder receives the protrusion of the flat fluorescent lamp so as to hold the same in a manner that no edges of the two parallel glass plates touch or come into contact with the lamp holder.
    Type: Grant
    Filed: October 5, 2001
    Date of Patent: August 26, 2003
    Assignee: NEC LCD Technologies, Ltd.
    Inventor: Fumihiko Fujishiro
  • Patent number: 6611302
    Abstract: A taper 31 is formed in a holding wall 15 in a holding frame 11 for holding the periphery of a flat display panel 2 such as a liquid crystal panel so as to be apart from the display panel 2 from the lower side of the boundary face between substrates 4 and 5 to the upper end. On the substrate 4 side lower than the boundary of the substrates 4 and 5, a holding face 15a which comes into contact with only the end face of the lower substrate 4 is provided.
    Type: Grant
    Filed: July 10, 2000
    Date of Patent: August 26, 2003
    Assignee: NEC LCD Technologies, Ltd.
    Inventors: Shoichi Ueda, Yoshinobu Sakaki
  • Patent number: 6608664
    Abstract: Disclosed is a liquid crystal display having a housing; and a liquid crystal panel which has a first substrate and a second substrate each of which has a nearly line-symmetrical and planar form and which have a nearly equal surface area and at least one of which are transparent, the first substrate and second substrate being nearly parallel disposed sandwiching a liquid crystal composition layer. The first substrate is provided with mounting end regions that are extended outside from the end of the second substrate at the line-symmetrical position of the first substrate, so that the liquid crystal panel is fixed to the housing through the mounting end regions.
    Type: Grant
    Filed: May 23, 2000
    Date of Patent: August 19, 2003
    Assignee: NEC LCD Technologies, Ltd.
    Inventor: Fumio Hasegawa
  • Patent number: 6608663
    Abstract: In an active matrix liquid-crystal display device, dummy contact holes are provided between neighboring terminals, so as to prevent a poor connection between the lower metal layer of a terminal and a TAB caused by conductive particles of an ACF remaining on an organic film, and contact holes that make connections between an upper layer transparent electrode of a terminal and a lower metal layer are formed by a plurality of fine via holes, so that sufficient conductive particles of the ACF remain on the upper transparent electrode and a good connection is made to TAB connection lines.
    Type: Grant
    Filed: January 28, 2002
    Date of Patent: August 19, 2003
    Assignee: NEC LCD Technologies, Ltd.
    Inventors: Michiaki Sakamoto, Choei Sugitani
  • Patent number: 6608653
    Abstract: A thin film transistor is designed in such a manner that a semiconductor region includes source and drain electrodes in a channel width direction and further, a planar source-side overlap area constructed by a gate electrode, the source electrode and the semiconductor region and a planar drain-side overlap area constructed by the gate electrode, the drain electrode and the semiconductor region exist. An optimal overlap length of one of the source-side and drain-side overlap areas in a channel length direction is determined, for instance, to be 4 &mgr;m, for a light incident on a channel portion of the thin film transistor to have a light intensity below or equal to 0.2% of a light intensity of the backlight incident toward the thin film transistor, thereby reducing a light-induced OFF leak current sufficiently and further improving flickering and display uniformity.
    Type: Grant
    Filed: November 28, 2001
    Date of Patent: August 19, 2003
    Assignee: NEC LCD Technologies, Ltd.
    Inventors: Shunsuke Shiga, Fuminori Tamura, Shouichi Kuroha, Makoto Watanabe
  • Patent number: 6600526
    Abstract: A LCD device has a backlight unit disposed at the rear side of the display panel. The backlight unit includes a light-conductive plate, an elongate lamp for emitting light, an elongate reflecting member for reflecting the light toward the light-reception surface of the light-conductive plate. The reflecting member is formed as an L-shaped member having a front flange extending on the edge portion of the light-emission surface (26a) and a side flange abutting an extension of the reflection sheet extending from the rear surface of the light-conductive plate.
    Type: Grant
    Filed: March 22, 2001
    Date of Patent: July 29, 2003
    Assignee: NEC LCD Technologies, Ltd.
    Inventor: Takakazu Yano
  • Patent number: 6597414
    Abstract: A horizontal electric-field type LCD device is provided, which prevents the display quality from degrading due to unwanted electric field with a thin and simple structure. This device is comprised of (a) a first transparent substrate; (b) a protecting conductive layer formed on an outer surface of the first substrate; (c) a second transparent substrate coupled with the first substrate to form a space between inner surfaces of the first and second substrates; the second substrate having an extended part that extend from the periphery of the first substrate; (d) a grounding electrode formed on the inner surface of the extended part of the second substrate; (e) a liquid crystal confined in the space formed between the inner surfaces of the first and second substrates; and (f) a conductive, elastic connection member for electrically interconnecting the conductive layer on the first substrate with the grounding electrode on the second substrate.
    Type: Grant
    Filed: February 28, 2000
    Date of Patent: July 22, 2003
    Assignee: NEC LCD Technologies, Ltd.
    Inventor: Fumio Hasegawa
  • Patent number: 6583556
    Abstract: A flat-type fluorescent lamp for LCD devices is provided, which makes it possible to narrow the picture-frame area and to widen the emission area and which facilitates their wiring, connection and assembly operations.
    Type: Grant
    Filed: November 28, 2001
    Date of Patent: June 24, 2003
    Assignee: NEC LCD Technologies, Ltd.
    Inventors: Toshiya Oishi, Fumihiko Fujishiro, Tsutomu Kanatsu