Patents Assigned to NEC LCD Technologies, Ltd.
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Patent number: 7609354Abstract: Disclosed is a liquid crystal display device that includes a TFT substrate. A plurality of gate lines and a plurality of common lines extend in a first direction on the TFT substrate. Drain lines extend in a second direction substantially perpendicularly to these lines. Bus lines are located outside a display area and are extending parallel to the drain lines. Common line terminals are provided on either side of each block that is constituted by a predetermined number of gate terminals. The common line terminals and the lead lines therefor are formed on the same layer as the drain lines and are connected to the bus lines on the same layer without any contacts being used. Resistance along the routes taken by common lines can be reduced.Type: GrantFiled: March 28, 2005Date of Patent: October 27, 2009Assignee: NEC LCD Technologies, LtdInventors: Takayuki Konno, Satoshi Inada, Yoshiro Kitagawa, Shinichi Nishida
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Patent number: 7609343Abstract: In a semi-transmissive liquid crystal display device, the thickness of liquid crystal layer in the reflective region can be adjusted by controlling the film thickness of the organic insulating film for reflection and the film thickness of the color layer for reflection. Furthermore, the thickness of liquid crystal layer in the transmissive region can be adjusted by controlling the film thickness of the organic insulating film for transmission and the film thickness of the color layer for transmission. Since the thicknesses of liquid crystal layer in the reflective region and that in the transmissive region can be adjusted, the reflectance in the reflective region and the transmittance in the transmissive region can each be set at the most appropriate values.Type: GrantFiled: November 2, 2005Date of Patent: October 27, 2009Assignees: NEC LCD Technologies, Ltd., NEC CorporationInventors: Michiaki Sakamoto, Osamu Sukegawa, Hidenori Ikeno
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Patent number: 7609350Abstract: A display portion is divided by scan lines and signal lines into sections where pixels are provided. Contact holes each for connecting common wiring and a common electrode together are not formed for all the pixels, but decimated so as to be arranged in zigzags.Type: GrantFiled: September 20, 2006Date of Patent: October 27, 2009Assignee: NEC LCD Technologies, Ltd.Inventors: Shingo Saigo, Takasuke Hayase, Makoto Horinouchi, Hideto Motoshima, Akitoshi Maeda
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Publication number: 20090262148Abstract: To provide a hold-type display device having a fine luminance efficiency while suppressing generation of motion blur. A controller according to the invention adjusts a signal outputted to a hold-type image display panel, which includes: a double-speed drive converting part which divides one frame of an inputted video signal to a plurality of sub-frames; a color converting part which converts a video signal of three primary colors including the plurality of sub-frames to a video signal of four or more colors including the three primary colors and a compound color; and a sub-frame converting part which converts, the video signal converted by the color converting part, to a signal having a plurality of different gradations whose average luminance value becomes equivalent to luminance of the video signal converted by the color converting part, and takes each of the plurality of gradations as each of gradations of the plurality of sub-frames.Type: ApplicationFiled: April 9, 2009Publication date: October 22, 2009Applicant: NEC LCD Technologies, Ltd.Inventor: Hiroaki KIMURA
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Patent number: 7604487Abstract: 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: GrantFiled: January 25, 2008Date of Patent: October 20, 2009Assignee: NEC LCD Technologies, Ltd.Inventor: Kei Takahashi
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Patent number: 7602449Abstract: 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: GrantFiled: March 18, 2005Date of Patent: October 13, 2009Assignee: NEC LCD Technologies, Ltd.Inventor: Fumihiko Fujishiro
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Publication number: 20090251626Abstract: To provide a structure and a manufacturing method which can manufacture, at a low cost and with good yield, a liquid crystal display panel having a lenticular lens and a substrate formed in a unified manner. When forming a lenticular lens onto a mother CF substrate by using a wet etching method, substrates are dipped into an etching solution while being raised up in such a manner that the length direction of slit openings of a mask is aligned with a vertical direction and an area having no mask pattern comes on a bottom side. With this, the residuals generated due to glass impurities can be drained towards the lower side along the lenticular lens shape to be discharged to the flat area, which makes it possible to suppress deterioration in the etching processed shape.Type: ApplicationFiled: April 3, 2009Publication date: October 8, 2009Applicant: NEC LCD Technologies, Ltd..Inventors: Hiroshi OKUMURA, Setsuo KANEKO
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Patent number: 7597469Abstract: An edge-light type backlight unit reduces the color unevenness on the display screen caused by the arrangement of point-shaped light sources (e.g., LEDs) in a point-shaped light source unit comprising a set of point-shaped light sources aligned. The backlight unit includes at least one point-shaped light source unit having point-shaped light sources arranged in a single direction in a predetermined order, the light sources emitting monochromatic light of different colors. The unit further comprises a first optical filter for limiting or controlling transmission of the monochromatic light emitted from one of the light sources disposed at one end of the light source unit, and a second optical filter for limiting or controlling transmission of the monochromatic light emitted from another of the light sources disposed at the other end thereof. The first and second filters are selectively formed on a first or second light guide plate or a diffusing plate.Type: GrantFiled: February 14, 2007Date of Patent: October 6, 2009Assignee: NEC LCD Technologies, Ltd.Inventor: Eitaro Nishigaki
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Patent number: 7599036Abstract: In an in-plane switching active matrix LCD apparatus wherein a liquid crystal layer is sealed between a pair of transparent substrates and pectinate pixel electrodes and common electrodes are formed on the transparent substrates, a transparent continuous solid electrode that evenly covers the pixel is provided via a transparent insulating film to the bottom layers of the pixel electrodes and common electrodes, and this transparent continuous solid electrode is in an electrically floating state. Transmissivity can thereby be improved with a simple configuration.Type: GrantFiled: May 25, 2007Date of Patent: October 6, 2009Assignee: NEC LCD Technologies, Ltd.Inventor: Hideki Ito
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Publication number: 20090237600Abstract: A LCD unit includes a reflective area and a transmissive area in each pixel, which are driven by respective drive electrode assemblies. A first substrate and a second substrate that sandwich therebetween a LC layer include respective shied films in the boundary area between the reflective area and the transmissive area.Type: ApplicationFiled: March 16, 2009Publication date: September 24, 2009Applicant: NEC LCD Technologies, Ltd.Inventors: Hiroshi Nagai, Michiaki Sakamoto, Kenichirou Naka, Kenichi Mori
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Patent number: 7593075Abstract: A reflector to be used in a liquid crystal display for reflecting an external light to display images therewith, including an organic film, and a reflective film formed covering the organic film therewith. The organic film has first raised and recessed portions at a surface thereof, and second raised and recessed portions formed at a surface of the first raised and recessed portions. The first raised and recessed portions include raised portions and recessed portions at least one of which is arcuate in cross-section, and the second raised and recessed portions are smaller in size than the first raised and recessed portions. The reflective film is shaped reflecting the first and second raised and recessed portions.Type: GrantFiled: February 13, 2006Date of Patent: September 22, 2009Assignee: NEC LCD Technologies, LtdInventors: Yasuki Kudou, Michiaki Sakamoto, Kenichirou Naka
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Patent number: 7593070Abstract: An optical unit, includes a light conductive plate having a first surface and a second surface, at least one optical sheet on the first surface of the light conductive plate, and a light reflective sheet extending over the entire second surface of the light conductive plate and fastened on a portion of a first surface of the optical sheet adjacent the periphery thereof to fasten the light conductive plate, the optical sheet, and the light reflective sheet as an optical unit, and to define a light discharge region on the first surface of the optical sheet and the first surface of the light conductive plate.Type: GrantFiled: November 16, 2007Date of Patent: September 22, 2009Assignee: NEC LCD Technologies, Ltd.Inventor: Toshihisa Ogawa
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Patent number: 7589812Abstract: A multi-domain alignment liquid crystal display device in which liquid crystal molecules are aligned through a simple process and panel gap is maintained in stable fashion includes a first plate having a thin-film transistor provided at each point of intersection of a scanning line and signal line, a pixel electrode connected to the thin-film transistor and a first orientation layer formed on the pixel electrode and defining a curved surface, and a second plate having RGB color layers, an counterelectrode provided so as to oppose the pixel electrode, and a second orientation layer. A columnar spacer for regulating the panel gap is provided between the two opposing plates, and liquid crystal is sandwiched between the two plates and subjected to multi-domain alignment by the first orientation layer having the curved surface and the columnar spacer.Type: GrantFiled: March 30, 2007Date of Patent: September 15, 2009Assignee: NEC LCD Technologies, Ltd.Inventor: Hiroaki Matsuyama
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Publication number: 20090225050Abstract: The present invention is configured such that a touch panel has a dot spacer that is disposed on an inner transparent conductive film and that is disposed on a display surface of a liquid crystal display panel via an air layer. An another dot spacer is disposed on a surface of touch panel opposite to the display surface of the liquid crystal display panel at a position which does not overlap with the dot spacer within a predetermined view angle range on the display surface.Type: ApplicationFiled: February 26, 2009Publication date: September 10, 2009Applicant: NEC LCD Technologies, Ltd.Inventor: Naohito Toyomaki
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Patent number: 7585098Abstract: Color non-uniformity due to LED light sources of a liquid crystal display (LCD) device is improved. A light quantity control film is arranged between an LED source and the entrance surface of a mixing light guide plate. This light quantity control film is arranged in the part which reduces the quantity of light of the LED with the strongest light quantity among a plurality of same colors.Type: GrantFiled: December 29, 2006Date of Patent: September 8, 2009Assignee: NEC LCD Technologies, Ltd.Inventor: Kazuaki Mikami
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Patent number: 7586572Abstract: A liquid crystal display is fabricated which has bus wires disposed in a grid shape, switching elements coupled to the bus wires, and pixel electrodes which are disposed on an interlayer insulating film formed by coating and which are coupled with the switching elements. In fabricating the liquid crystal display, when a transparent conductive film is formed on the interlayer insulating film which is formed by coating, the temperature of the substrate is controlled to become 100° C.-170° C. In another embodiment, when the transparent conductive film is formed on the interlayer insulating film in a non-heated condition, an oxygen flow rate ratio is set to 1% or lower, and annealing is performed after forming the film. Thereby, when etching the ITO film on the interlayer insulating film, etching residue is not produced. Further, contact resistance between the ITO film and the lower layer metal can be uniformly decreased, and display defects can be obviated.Type: GrantFiled: February 27, 2006Date of Patent: September 8, 2009Assignee: NEC LCD Technologies, Ltd.Inventors: Shigeru Kimura, Akitoshi Maeda, Satoshi Doi, Takayuki Ishino
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Patent number: 7586570Abstract: The present invention aims to provide a liquid crystal display device capable of realizing a wide view angle. A liquid crystal display device includes a liquid crystal film in which the liquid crystal molecules having positive dielectric anisotropy are diagonal oriented or hybrid oriented and a uniaxial film are arranged between the liquid crystal layer and at least one polarization plate, the orientation direction of the liquid crystal layer and the liquid crystal film are substantially the same, and the tilt direction of the liquid crystal molecules on the liquid crystal layer side of the liquid crystal film and the tilt direction of the liquid crystal molecules on the liquid crystal film side of the liquid crystal layer are substantially the same.Type: GrantFiled: August 31, 2007Date of Patent: September 8, 2009Assignee: NEC LCD Technologies, Ltd.Inventor: Kenichirou Naka
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Patent number: 7582933Abstract: A base layer is formed on an insulating substrate, and a semiconductor layer is formed in localized fashion thereon. A gate insulating film is then formed so as to cover the semiconductor layer, and a gate electrode is formed on a portion of the gate insulating film. An impurity is then implanted into the semiconductor layer via the gate insulating film, and a source region, a drain region, and an LDD region are formed. The gate insulating film is etched with dilute hydrofluoric acid. An electrode-protecting insulating film is then formed so as to cover the gate electrode, and the entire surface of the surface layer portion of the electrode-protecting insulating film is etched away using dilute hydrofluoric acid. Carrier traps introduced into the electrode-protecting insulating film and the gate insulating film are thereby removed.Type: GrantFiled: July 11, 2006Date of Patent: September 1, 2009Assignees: NEC Corporation, NEC LCD Technologies, LtdInventors: Shigeru Mori, Takahiro Korenari, Tadahiro Matsuzaki, Hiroshi Tanabe
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Patent number: 7583353Abstract: The invention provides a backlight unit, a liquid crystal display apparatus and a method of assembling the backlight unit in which a large number of optical sheets can be simply and surely assembled into a chassis in an appropriate order and direction, and is characterized by a first optical sheet which is a reference sheet and second optical sheets which are rest of the optical sheets. The first optical sheet is provided with first identification parts for specifying a layer of respective second optical sheets to be placed, and each of the second optical sheets is provided with a second identification part at a position corresponding to one of the first identification parts based on the layer position to be placed. The optical sheets are superposed so that each of the first identification parts is pared with the second identification part corresponding to the layer specified by the first identification part.Type: GrantFiled: December 8, 2006Date of Patent: September 1, 2009Assignee: NEC LCD Technologies, Ltd.Inventor: Hideki Kujiraoka
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Patent number: 7580018Abstract: In a liquid crystal display apparatus, a set of write-in voltages are generated corresponding to a horizontal line signal of an input video frame so that they appear at end points of the column lines of a LCD panel. The row lines of the LCD panel are successively selected and the write-in voltages are supplied from the end points of the column lines to the liquid crystal cells of the selected row line for a variable write-in period. In order to compensate for shades-of-gray differences between the top and bottom of the LCD panel, the write-in period is increasingly varied as a function of the geometric distance from the selected row line to the end points of the column lines. The write-in period may be increasingly variable from a nominal value, or from a less-than-nominal value to the nominal value, or a combination of both.Type: GrantFiled: April 22, 2004Date of Patent: August 25, 2009Assignee: NEC LCD Technologies, LtdInventors: Hiroshi Takeda, Machihiko Yamaguchi