Patents Assigned to NEC LCD Technologies
  • Patent number: 7551244
    Abstract: An optical element comprises a pair of substrates each having an electrode and bonded together with a gap therebetween and a light adjusting material including a liquid crystal and enclosed in the gap. Each of the pair of substrates has an electrode connecting portion to be connected to an external circuit. At least a part of the electrode connecting portion of each of the substrates is located on the same side as that of the optical element. The electrode connecting portion of one of the substrates and the electrode connecting portion of the other of the substrates have respective electrode portions at regions that are not opposed to each other. The electrode portion of each of the electrode connecting portions is connected to the external circuit.
    Type: Grant
    Filed: August 25, 2006
    Date of Patent: June 23, 2009
    Assignees: NEC Corporation, NEC LCD Technologies, Ltd., SEIKO Company, Ltd.
    Inventors: Kouji Mimura, Ken Sumiyoshi, Fujio Okumura, Shigetoshi Hayata, Tamio Uchino, Yoshiaki Furuya, Youhei Saitou, Katsuhisa Ishii, Takahiko Kanamori
  • Publication number: 20090153214
    Abstract: To provide, with a simple structure, a voltage controlled oscillator, etc., whose center oscillation frequency is stable even if there is a change in the temperature. A delay element includes: a delay generating part which adds a delay amount to an input signal to generate an output signal; and a delay control part which controls the delay. The delay control part has a delay adjusting circuit which outputs a first control signal for adjusting the delay amount, and a temperature compensating circuit which outputs a second control signal for compensating property changes caused by the temperature. The delay control part outputs a third control signal obtained by synthesizing the first control signal and the second control signal to the delay generating part to control the delay amount. The delay control part obtains the third control signal by having the delay adjusting circuit and the temperature compensating circuit connected in series.
    Type: Application
    Filed: November 25, 2008
    Publication date: June 18, 2009
    Applicant: NEC LCD Technologies, Ltd.
    Inventor: Kenichi TAKATORI
  • Patent number: 7548295
    Abstract: A pixel electrode connected to a signal line through a switching element and a common electrode connected to a common wiring are disposed, as alternating with each other, within each pixel region. Common potential lines are disposed on level below the signal line with an insulating film in between and also on both sides of the signal line when seen in plan view. A floating electrode is disposed on level above the signal line with a protective film in between, as overlapping the signal line and the common potential lines on both sides of the signal line.
    Type: Grant
    Filed: March 16, 2007
    Date of Patent: June 16, 2009
    Assignee: NEC LCD Technologies, Ltd.
    Inventors: Taku Kawasaki, Shinichi Nishida, Takayuki Konno
  • Publication number: 20090135381
    Abstract: An apparatus for processing a substrate includes a substrate carrier for carrying a substrate, a chemical-applying unit for applying chemical to the substrate, and a development unit for developing the substrate.
    Type: Application
    Filed: January 26, 2009
    Publication date: May 28, 2009
    Applicant: NEC LCD Technologies, Ltd.
    Inventor: Shusaku KIDO
  • Patent number: 7534026
    Abstract: In a display device equipped with a light source device, a second light-guide member is provided to the back surface of a first light-guide member that has an emitted light control sheet provided to the front surface thereof. The emitted light control sheet is composed of a flat plate portion and protrusions. A first light source mounted to a side surface of the first light-guide member, and a second light source mounted to a side surface of a second light-guide member are switched and turned on. The emitted light control sheet has light-condensing effects when the first light source is on, and has diffusing effects when the second light source is turned on. The angle range of illuminating light can thereby be switched.
    Type: Grant
    Filed: September 19, 2006
    Date of Patent: May 19, 2009
    Assignees: NEC Corporation, NEC LCD Technologies, Ltd.
    Inventors: Shin-ichi Uehara, Masao Imai
  • Patent number: 7532270
    Abstract: A method for manufacturing a liquid crystal display that provides a wide viewing angle and in which its manufacturing processes are shortened and high reliability is provided. The method includes the steps of forming a gate electrode metal layer and forming a gate electrode by patterning using photolithography; forming an interlayer insulating film, an a?Si layer, an n+ a?Si layer, and a drain electrode metal layer and forming a drain line and an island by performing patterning, ashing processing, reflow processing using photolithography, and peeling; forming an insulating film on a transparent insulating substrate and forming an insulating film contact used to provide a connection to a source electrode of an island at a specified position by patterning or a printing method; forming a transparent conductive film and forming a pixel electrode and common electrode by patterning using photolithography.
    Type: Grant
    Filed: January 25, 2008
    Date of Patent: May 12, 2009
    Assignee: NEC LCD Technologies, Ltd.
    Inventors: Yoshiaki Hashimoto, Hiroaki Tanaka, Shigeru Kimura, Syuusaku Kido
  • Patent number: 7532285
    Abstract: An LCD device includes therein a splay-oriented LC layer, first and second substrates sandwiching therebetween the LC layer, and an optical compensation film for reducing leakage light upon display of a black color. The optical compensation film has three optical elastic axes including a fast axis coinciding the Y-axis, a slow axis rotated from the X-axis by a positive rotational angle ? 1, and another axis rotated from the Z-axis by the positive rotational angle ? 1. The positive rotational direction coincides with a counter-clockwise direction within the substrate surface, as viewed from minus side toward the positive side of the Y-axis.
    Type: Grant
    Filed: September 15, 2005
    Date of Patent: May 12, 2009
    Assignee: NEC LCD Technologies, Ltd.
    Inventors: Hiroshi Nagai, Hidenori Ikeno
  • Patent number: 7528911
    Abstract: By using a photosensitive organic film, an uneven layer for forming a reflective electrode of a reflective region of a transflective liquid crystal display device and a protrusion for multi-division alignment of liquid crystals are concurrently formed. The heights of the uneven layer and of the protrusion are adjusted by using accumulated amounts of light to which the photosensitive organic film is exposed. The uneven layer can be used as an adjusting layer for adjusting the thickness of a liquid crystal layer.
    Type: Grant
    Filed: April 24, 2007
    Date of Patent: May 5, 2009
    Assignee: NEC LCD Technologies, Ltd.
    Inventor: Yasuki Kudo
  • Publication number: 20090109247
    Abstract: To provide a display panel control device capable of preventing generation of step-like tailing and ghost when executing black insertion drive. A first correction device performs first correction on a gradation value of a video signal by considering response delay of the display panel when changing from a second gradation voltage to a first gradation voltage. A second correction device performs second correction on one of or both of the gradation value of the video signal and the gradation voltage of a monochrome image signal by considering accumulative luminance reaching delay of the video part caused due to a difference between each monochrome display luminance of each monochrome image part in different unit frame cycle periods, when the gradation value of the video signal changes from a unit frame cycle period to another unit frame cycle period.
    Type: Application
    Filed: October 22, 2008
    Publication date: April 30, 2009
    Applicant: NEC LCD Technologies, Ltd.
    Inventor: Hiroaki KIMURA
  • Publication number: 20090102769
    Abstract: An image display device is provided which is capable of improving reproducibility of a white color. An RGB video signal is converted by a gamma converting section into three color luminance values and the maximum luminance value and minimum luminance value of the three color luminance values are calculated by a Min/Max calculating section. The first four color luminance values are calculated by an RGB luminance calculating section. A scaling factor is calculated by a scaling factor calculating section based on the first four color luminance values and the maximum luminance value. The second four color luminance values are calculated by an RGBW scaling luminance calculating section based on the first four color luminance values and on the scaling factor. An RGBW video signal corresponding to a gray level value of four color is generated by a reverse gamma converting section.
    Type: Application
    Filed: October 21, 2008
    Publication date: April 23, 2009
    Applicant: NEC LCD Technologies, Ltd.
    Inventors: Makoto KOUNO, Hiroaki Kimura
  • Publication number: 20090103282
    Abstract: A display device including a display panel which displays an image and a backlight unit which illuminates a light to the display panel, include the backlight unit with a fixing member fixed on a device casing; a flexible printed circuit substrate which is fixed on the fixing member; and a spacer which is fixed on the flexible printed circuit substrate, wherein the flexible printed circuit substrate in an end part of the display panel is sandwiched between the fixing member and the spacer.
    Type: Application
    Filed: October 16, 2008
    Publication date: April 23, 2009
    Applicant: NEC LCD Technologies, Ltd.,
    Inventor: Hideki ITAYA
  • Patent number: 7522254
    Abstract: A liquid crystal display device including a first substrate, a second substrate facing and spaced away from the first substrate, a liquid crystal layer sandwiched between the first and second substrates, a switching device formed on the first substrate, a first electrically insulating film randomly patterned on the first substrate, a second electrically insulating film covering the first electrically insulating film therewith, and having a wavy surface, and a reflection electrode formed on the second electrically insulating film, and electrically connected to an electrode of the switching device, wherein a light passing through the second substrate and the liquid crystal layer is reflected at the reflection electrode, and the second electrically insulating film extends outwardly from the first electrically insulating film by a certain length at an end of a display region in which images are to be displayed, such that a step formed by the first and second electrically insulating films in the vicinity of the en
    Type: Grant
    Filed: July 12, 2005
    Date of Patent: April 21, 2009
    Assignee: NEC LCD Technologies
    Inventors: Hironori Kikkawa, Michiaki Sakamoto, Yuichi Yamaguchi, Hidenori Ikeno, Fumihiko Matsuno
  • Patent number: 7520655
    Abstract: A housing member accommodates a liquid crystal display panel and a lighting unit. The housing member is provided with a penetrated space for receiving a light-source unit in the lighting unit therein. A pair of fastening members are attached to a pair of openings of the space, respectively, for supporting the light-source unit within the space such that each of the fastening members allows to insert the light-source unit into the space from either one of the pair of the openings.
    Type: Grant
    Filed: September 26, 2006
    Date of Patent: April 21, 2009
    Assignee: NEC LCD Technologies, Ltd.
    Inventor: Shizuo Morishita
  • Patent number: 7518690
    Abstract: An image display device prevents display abnormality due to the corrosion and/or disappearance of the testing electrodes and/or and the conductive film for leading lines with a simple structure. Leading lines, which are in the wiring terminal section, electrically connect internal wiring lines to a driver IC. Each of the leading line has a mounting electrode and a testing electrode. A patterned first conductive film, which is separate from the testing electrode, connects electrically the mounting electrode to the corresponding internal wiring line in the display section. A patterned connecting conductive film is formed on an insulative film to contact with the mounting and testing electrodes, thereby making electrical interconnection between the mounting and testing electrodes. The connecting conductive film is made of a material (e.g., ITO) whose corrosion resistance is greater than a material (e.g., Cr) for the testing electrode.
    Type: Grant
    Filed: May 24, 2007
    Date of Patent: April 14, 2009
    Assignee: NEC LCD Technologies, Ltd.
    Inventor: Manabu Komaju
  • Patent number: 7518586
    Abstract: A method for driving an LCD and its driving circuits are provided which are capable of being constructed at low costs, of reducing a flicker that occurs when a monochromatic color is displayed or an arbitrary image is displayed and of simultaneously making an adjustment for minimizing a line flicker and flicker occurring on an entire screen and of being applied to application areas in which a display is made more high-definition and a screen is made larger. The LCD is driven in a manner that a polarity of a data signal is reversed for every two scanning electrodes and for every signal electrode and the data signal having the reversed polarity is sequentially fed to each of signal electrodes.
    Type: Grant
    Filed: August 10, 2001
    Date of Patent: April 14, 2009
    Assignee: NEC LCD Technologies, Ltd.
    Inventor: Shunichi Hosoyamada
  • Patent number: 7517464
    Abstract: A method for manufacturing a TFT panel of an LCD device includes the steps of wet etching a multilayer metallic structure including a high-melting-point metal film (HMPM) film, Al film and another HMPM film while using side etching technique by using a photoresist mask, hot-water washing the side walls of the Al film after the wet etching, and dry etching for configuring the channel region of a TFT in each pixel, and removing the photoresist mask. The presence of the photoresist mask and the protection film prevents corrosion of Al caused by plasma of the etching gas in the dry etching.
    Type: Grant
    Filed: April 4, 2006
    Date of Patent: April 14, 2009
    Assignee: NEC LCD Technologies, Ltd.
    Inventors: Hidekazu Matsushita, Tsuyoshi Katoh, Satoshi Doi, Akitoshi Maeda
  • Patent number: 7518667
    Abstract: In a provided LCD device, a common electrode and a picture element electrode which make up the main portion of a unit picture element of the LCD device are both made up of one thin conductive layer made of a Cr layer, while a common electrode wiring line and a data line or a like which are connected to the common electrode and the picture element electrode respectively are each formed as a stacked film made up of a first conductive film (thick Cr layer) and a second conductive film (thin Cr layer). This configuration enables increasing the film thickness of wiring lines such as, especially, the common electrode wiring line and the data line or the like, thus decreasing a wiring line resistance thereof.
    Type: Grant
    Filed: August 1, 2005
    Date of Patent: April 14, 2009
    Assignee: NEC LCD Technologies, Ltd.
    Inventors: Takuya Asai, Syouichi Kuroha, Takeshi Sasaki
  • Patent number: 7518680
    Abstract: Disclosed is an in-plane switching active matrix type liquid crystal display with greater improvements on color shifting and contrast. The liquid crystal display comprises an in-plane switching type liquid crystal display panel having an active device substrate, an opposing substrate and a liquid crystal layer held sandwiched between the active device substrate and the opposing substrate, a first polarizer laid out on one side of the liquid crystal display panel, a second polarizer laid out on the opposite side of the liquid crystal display panel, first to third optical compensators placed in order between the liquid crystal display panel and the first polarizer, and a fourth optical compensator placed between the liquid crystal display panel and the second polarizer.
    Type: Grant
    Filed: December 1, 2006
    Date of Patent: April 14, 2009
    Assignee: NEC LCD Technologies, Ltd.
    Inventors: Kunimasa Itakura, Eriko Fujimaki
  • Patent number: 7518589
    Abstract: A liquid crystal display device having two pieces of liquid crystal display panels commonly using a source driver is provided which is capable of displaying a different image in each of the two pieces of liquid crystal display panels. The liquid crystal display device includes the two liquid crystal display panels commonly using drain lines, a timing controller to control outputting timing of an image data signal for each liquid crystal display panel, a source driver to output image data, gate line by gate line, to a plurality of drain lines for each liquid crystal display panel, and gate drivers to sequentially output gate driving pulses to gate lines for each liquid crystal display panel according to a signal to provide instructions for a staff of outputting of an image data signal and to a signal to control an inputting period of image data in every line.
    Type: Grant
    Filed: March 4, 2005
    Date of Patent: April 14, 2009
    Assignee: NEC LCD Technologies, Ltd.
    Inventor: Hiroshi Takeda
  • Publication number: 20090091692
    Abstract: A LCD device includes a LC cell including a homogeneously-oriented LC layer and a pair of transparent substrates. A pair of polarizing films sandwiching therebetween the LC cell. A protective layer of the light-emitting-side polarizing film has an optical isotropy, and protective layer of the light-incident-side polarizing film has an thickness-wise retardation of 20 to 90 nm. A biaxial optical anisotropic film is interposed between the light-emitting-side polarizing film and the LC cell, and a second optical anisotropic film for cancelling the wavelength dispersion caused by the biaxial optical anisotropic film is interposed between the light-incident-side polarizing film and the LC cell. The biaxial optical anisotropic film has three-dimensional refractive indexes ns, nf and nz that satisfy therebetween (ns?nz)/(ns?nf)?0.
    Type: Application
    Filed: October 3, 2008
    Publication date: April 9, 2009
    Applicant: NEC LCD Technologies, Ltd.
    Inventor: Hiroshi NAGAI