Patents Assigned to NEC LCD Technologies
  • Patent number: 7411648
    Abstract: An auxiliary plate (10) is fixed to a rear plane of a housing for fixedly holding a lamp unit (6) having a plurality of lamps. In the auxiliary plate (10), a convex portion and a concave portion are combined. The convex portion has a space between the housing and itself, which is formed by protruding a sheet metal, and the concave portion contacts with the housing by denting the sheet metal. In the auxiliary plate 10, an area for mounting a board vulnerable to heat is formed with the convex portion and an air layer performs as heat insulation. The convex and concave portions are arrayed in a direction where heated air easily flows in another area. Thus, rigidity can be remarkably increased compared to a flat-shaped sheet metal, and heat generated by a backlight is effectively dissipated, as well as a temperature rise and an occurrence of a temperature gradient are suppressed.
    Type: Grant
    Filed: October 14, 2004
    Date of Patent: August 12, 2008
    Assignee: NEC LCD Technologies, Ltd
    Inventor: Hiroshi Ishida
  • Publication number: 20080188099
    Abstract: A device includes a chassis and a flexible printed circuit. The flexible printed circuit has a terminal portion which is disposed so as to overlap with a mounted area of a circuit board mounted on a surface of the chassis. The device includes a connection auxiliary member which is disposed on the surface of the chassis at a position close to the terminal portion. The connection auxiliary member includes a fixed portion fixed to the surface of the chassis and a deformed portion connected to the fixed portion. The deformed portion deforms so that a part thereof rises from the surface of the chassis by pushing the deformed portion toward the fixed portion to lift up the terminal portion of the flexible printed circuit from the surface of the chassis.
    Type: Application
    Filed: January 25, 2008
    Publication date: August 7, 2008
    Applicant: NEC LCD Technologies, Ltd.
    Inventor: Kei TAKAHASHI
  • Patent number: 7405782
    Abstract: There is provided a liquid crystal display device including a display screen comprised of a plurality of areas in each of which a pixel pattern is formed, wherein any two areas located adjacent to each other, among the areas, have at least two stitches therebetween.
    Type: Grant
    Filed: May 24, 2006
    Date of Patent: July 29, 2008
    Assignee: NEC LCD Technologies, Ltd.
    Inventors: Takayuki Ishino, Yuji Yamamoto, Shinichi Nakata, Masami Yamashita
  • Patent number: 7405156
    Abstract: A photoresist pattern is formed on an insulating substrate so that it has a reverse tapered cross section and a reverse pattern of a wiring pattern to be formed. Next, a nanoparticles-containing ink is injected on a wiring region using an inkjet system, followed by a leveling process, a drying process, a resist separation process and a baking process. Thus a wiring pattern is formed.
    Type: Grant
    Filed: July 6, 2005
    Date of Patent: July 29, 2008
    Assignee: NEC LCD Technologies, Ltd.
    Inventor: Hiroaki Tanaka
  • Patent number: 7403243
    Abstract: A housing for holding and fixing components of a liquid crystal display device is composed of a pair of frame members each having the same shape. Four sides of the side face of each frame member are formed such that an outer face section positioned at the outer side when combined and an inner face section positioned at the inner side when combined are stepped to each other, and a cut section is formed between the outer face section and the inner face section. The side face section of the frame member of the housing is formed to be stepped as described above, so that the strength and assembling property are enhanced, thereby being capable of preventing deterioration in display quality caused by the displacement of the position and space of the components.
    Type: Grant
    Filed: January 10, 2005
    Date of Patent: July 22, 2008
    Assignee: NEC LCD Technologies, Ltd.
    Inventors: Hirokazu Fukuyoshi, Shin-Ichirou Ono
  • Patent number: 7391488
    Abstract: In a reflection type liquid crystal display device having a front light and a reflection type liquid crystal panel including a reflection electrode of uneven structure, average tilt angles of the uneven structure of the reflection electrode are changed to form a high directivity reflective region having a characteristic reflecting an incident light from the front light in a vertical direction and a wide viewing angle reflective region having a characteristic reflecting an outside light incident slantingly from the front in a vertical direction, thereby forming the high directivity reflective region and the wide viewing angle reflective region to be mixed in the reflection electrode in the same display device.
    Type: Grant
    Filed: May 28, 2003
    Date of Patent: June 24, 2008
    Assignee: NEC LCD Technologies, Ltd.
    Inventors: Fumihiko Fujishiro, Hironori Kikkawa, Michiaki Sakamoto
  • Patent number: 7388644
    Abstract: There is provided a liquid crystal display device including a display screen comprised of a plurality of areas in each of which a pixel pattern is formed, wherein any two areas located adjacent to each other, among the areas, have at least two stitches therebetween.
    Type: Grant
    Filed: May 24, 2006
    Date of Patent: June 17, 2008
    Assignee: NEC LCD Technologies, Ltd.
    Inventors: Takayuki Ishino, Yuji Yamamoto, Shinichi Nakata, Masami Yamashita
  • Patent number: 7373834
    Abstract: A lower capacitive electrode and a capacitive electrode of an opposite substrate are provided to mutually facing surfaces of a TFT substrate and the opposite substrate, respectively; and a seal member is provided to the peripheral part of both substrates. The seal member creates a predetermined gap between the substrates, and the surrounded space is sealed by the seal member. A pressure sensor measures pressure applied to the substrates based on variations in capacitance between the lower capacitive electrode and the facing-substrate capacitive electrode. An acceleration sensor is incorporated into the TFT substrate within the pressure sensor. The presence of the acceleration sensor inside the pressure sensor thereby eliminates the need for a separate pressure sensor and acceleration sensor, and allows a pressure sensor that improves the moisture resistance of the acceleration sensor to be provided.
    Type: Grant
    Filed: October 26, 2006
    Date of Patent: May 20, 2008
    Assignee: NEC LCD Technologies, Ltd
    Inventor: Mitsuasa Takahashi
  • Patent number: 7372211
    Abstract: A cold cathode tube lighting device is provided which is capable of obtaining stable luminance when a cold cathode tube is driven by applying voltages to input terminals on both ends of the cold cathode tube. A first current flowing through each of transformer secondary sides of transformers is detected by a tube current detecting circuit from a low-voltage side of each of the transformer secondary sides and a second current flowing through each of resonance capacitors is detected by the tube current detecting circuit and a difference between the first current and the second current is calculated for every separately-excited inverter and, based on the difference, a tube current of the cold cathode tube is obtained and frequencies of driving pulse voltages are changed by a voltage controlling oscillator for setting so that the tube current maintains a predetermined value.
    Type: Grant
    Filed: February 28, 2006
    Date of Patent: May 13, 2008
    Assignee: NEC LCD Technologies, Ltd.
    Inventor: Nobuaki Honbo
  • Patent number: 7369201
    Abstract: A liquid-crystal display suitable for the optically compensated birefringence (OCB) display mode is used so as to simplify the voltage setting relating to display of each color by setting as follows. A liquid-crystal layer is oriented to bend alignment between a pair of substrates. A phase compensation plate is set for compensating a phase of the liquid-crystal layer outside of each of the substrates. And a retardation between the liquid-crystal and the phase compensation plates is set to a value ½ or less of the minimum wavelength of the light relating to display.
    Type: Grant
    Filed: March 16, 2000
    Date of Patent: May 6, 2008
    Assignee: NEC LCD Technologies, Ltd.
    Inventors: Hironori Kikkawa, Takahiko Watanabe
  • Patent number: 7369208
    Abstract: First and second columnar spacers are formed on a color filter substrate, and step films are formed on an active matrix substrate in the same step as signal lines. The columnar spacers are formed by proximity exposure, and the step films are formed by being exposed by a lens projection system. In plan view, the step films are disposed inside the columnar spacers. The first columnar spacers are made to be in contact with the regions of the protective film that are higher in elevation with the step films in the active matrix substrate.
    Type: Grant
    Filed: June 14, 2005
    Date of Patent: May 6, 2008
    Assignee: NEC LCD Technologies, Ltd.
    Inventors: Daisuke Inoue, Hideki Ito, Hiromitsu Tanaka, Takashi Kamino
  • Patent number: 7369206
    Abstract: A sealing member is formed on a glass substrate, and dropping points are arranged in the form of a matrix in the region surrounded by the sealing member. The dropping points arranged in the outermost columns and the second outermost columns are connected respectively to imagine first straight lines and second straight lines. Third straight lines are imagined to be equidistant from the first straight lines and the second straight lines. The positions of the dropping points are determined in such a manner that the density of the dropping points in four edge divided regions can be 0.9 to 1.1 times the density of the dropping points in the region as a whole, and the density of the dropping points in four corner divided regions can be 0.83 to 1.17 times the density of the dropping points in the region as a whole.
    Type: Grant
    Filed: June 14, 2005
    Date of Patent: May 6, 2008
    Assignee: NEC LCD Technologies, Ltd.
    Inventors: Daisuke Inoue, Hideki Ito, Hiromitsu Tanaka, Takashi Kamino
  • Patent number: 7369200
    Abstract: A semi-transmission type liquid crystal display that maximizes the luminance in reflection mode and transmission mode. The liquid crystal display comprises a lower substrate with thin film transistors, an opposite substrate facing the lower substrate, a liquid crystal layer between the lower substrate and the opposite substrate, a reflection electrode formed in a reflection area of the lower substrate, a transparent electrode formed in a transparent area of the lower substrate, a common electrode formed on the opposite substrate, and a drive circuit for applying a voltage between the reflection electrode and the transparent electrode and the common electrode. The potential difference between a drive voltage applied to that surface of the lower substrate which contacts the liquid crystal layer and a drive voltage applied to that surface of the opposite substrate which contacts the liquid crystal layer is lower in the reflection area than in the transparent area.
    Type: Grant
    Filed: September 28, 2005
    Date of Patent: May 6, 2008
    Assignee: NEC LCD Technologies, Ltd.
    Inventors: Hidenori Ikeno, Masayoshi Suzuki
  • Patent number: 7354173
    Abstract: A direct-emission backlight unit for use in an LCD device includes a plurality of elongate lamps at the rear of a light diffusion plate and a plurality of reflecting members arranged in a matrix on a rear reflecting plate. The reflecting members are disposed in the gap between adjacent lamps, and reflect light emitted by the lamps toward the diffusion plate for achieving a uniform luminance profile of the emission surface of the backlight unit.
    Type: Grant
    Filed: September 30, 2005
    Date of Patent: April 8, 2008
    Assignee: NEC LCD Technologies, Ltd.
    Inventor: Shin-ichirou Ono
  • Patent number: 7355670
    Abstract: A liquid crystal display device includes a first substrate including a thin film transistor, a data line, a pixel electrode, and a common electrode, a second substrate, and liquid crystal sandwiched between the first and second substrates, wherein an image signal is applied to the thin film transistor through the data line to generate an electric field between the pixel electrode receiving the image signal and the common electrode such that the liquid crystal is rotated by the electric field in a plane which is in parallel with the first substrate. The first substrate includes an electrically insulating inorganic film covering the data line therewith, a first island-shaped electrically insulating organic film formed on the electrically insulating inorganic film above the data line, and a shield common electrode covering the first island-shaped electrically insulating organic film therewith and overlapping the data line when viewed vertically.
    Type: Grant
    Filed: September 13, 2006
    Date of Patent: April 8, 2008
    Assignee: NEC LCD Technologies, Ltd.
    Inventors: Yoshiro Kitagawa, Satoshi Kimura, Tsuyoshi Satoh, Hidenori Kusanagi, Juko Funaki, Sounosuke Takahashi, Takayuki Konno, Shinichi Nishida
  • Publication number: 20080080040
    Abstract: A microlouver includes a periodic structure in which a transparent layer and a light absorption layer are alternately disposed with a constant, repetitive period. The range of the exit direction of a light beam passing through the transparent layer is restricted by the light absorption layer. The periodic structure includes a periodic structure portion divided in the direction that intersects the direction in which the transparent layer and the light absorption layer are repeatedly disposed. In the periodic structure portion, between the periodic structures adjacent to each other, there is a difference of 180 degree in the phase of spatial frequency of each periodic structure.
    Type: Application
    Filed: August 29, 2007
    Publication date: April 3, 2008
    Applicant: NEC LCD Technologies, Ltd.
    Inventors: Koji MIMURA, Ken Sumiyoshi
  • Patent number: 7350956
    Abstract: A backlight unit prevents the display quality degradation of a LCD device and improves the long-term reliability thereof. The unit comprises at least one fluorescent lamp having a first end and a second end; a first cable or wire connected to the first end of the lamp; and a second cable or wire connected to the second end of the lamp. The first cable or wire is different in shape or type from the second cable or wire. A conductor of the first cable or wire is approximately equal in cross-sectional area to that of the second cable or wire. When two or more fluorescent lamps are used, a cross-sectional area of the conductor of the first cable connected commonly to the first ends of the lamps is approximately equal to the sum of cross-sectional areas of the conductors of the second cables or wires connected respectively to the second ends thereof.
    Type: Grant
    Filed: February 2, 2006
    Date of Patent: April 1, 2008
    Assignee: NEC LCD Technologies, Ltd.
    Inventor: Yoshinobu Sakaki
  • Patent number: 7350952
    Abstract: An illumination system that makes it possible to generate light with less color irregularity with a simple structure while restraining the increase of size is provided. A tube-shaped reflector having a tube-shaped wall whose inner surface is reflective is provided. The wall includes an aperture extending along a longitudinal axis of the reflector. In the reflector, plural sets of LEDs are arranged, where colors of light to be emitted from the LEDs in each set are different (for example, red, green, or blue LEDs are used for each set). The LEDs in each set are arranged along the longitudinal axis of the reflector to form a linear light source. A collecting lens is fixed to the reflector in such a way as to fill the aperture of the reflector.
    Type: Grant
    Filed: March 20, 2006
    Date of Patent: April 1, 2008
    Assignee: NEC LCD Technologies, Ltd.
    Inventor: Eitaro Nishigaki
  • Patent number: 7352432
    Abstract: A slit portion is provided at the center of a shield common electrode which is overlapped with a drain wire as a different layer. When an interlayer short-circuiting occurs between the drain wire and the shield common electrode, it induces a critical defect on a screen display, however, a line defect can be repaired/extinguished by cutting both the sides of the slit at the short-circuited portion with laser repair and separating the short-circuited portion.
    Type: Grant
    Filed: November 29, 2004
    Date of Patent: April 1, 2008
    Assignee: NEC LCD Technologies, Ltd.
    Inventors: Shinji Yokogawa, Yusuki Nogami
  • Publication number: 20080074577
    Abstract: Disclosed is a liquid crystal display apparatus, including: a liquid crystal display panel; a polarizing plate which is processed to be conductive and is attached to a surface of the liquid crystal display panel; and a conductive frame, wherein the polarizing plate includes a projecting area which projects outward from the edge of the liquid crystal display panel, and wherein the conductive frame presses the projecting area of the polarizing plate in order to ground the polarizing plate. A method for grounding a liquid crystal display apparatus is also disclosed.
    Type: Application
    Filed: September 26, 2007
    Publication date: March 27, 2008
    Applicant: NEC LCD Technologies, Ltd.
    Inventor: Akihide Sato