Patents Assigned to NEC LCD Technologies
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Publication number: 20090002580Abstract: A liquid crystal display device with a touch panel has a reflective display region and a transmissive display region, at least the transmissive display region including a liquid crystal layer energizable according to a lateral electric field mode. The liquid crystal display device includes a liquid crystal layer held between a pair of substrate disposed in confronting relation to each other, observer-side circular polarizer 9 disposed outwardly of one of the substrates, back-side circular polarizer 8 disposed outwardly of the other substrate, observer-side compensator 11 for reducing refractive index anisotropy of the liquid crystal layer in the reflective display region and the liquid crystal layer in the transmissive display region, and touch panel 13 disposed between observer-side circular polarizer 9 and observer-side compensator 11.Type: ApplicationFiled: March 20, 2008Publication date: January 1, 2009Applicant: NEC LCD TECHNOLOGIES, LTD.Inventors: Jin MATSUSHIMA, Ken Sumiyoshi, Shinichi Uehara
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Publication number: 20080316382Abstract: Disclosed is a display device including: a display panel on which a plurality of driver chips are mounted by using a COG configuration; a signal substrate on which a timing controller for generating a differential signal inputted into each of the driver chips is formed; and a connecting substrate which connects the plurality of driver chips with the timing controller, wherein the connecting substrate includes a first connecting substrate on which a first line for inputting the differential signal into a driver chip excluding a driver chip located at a terminating area is formed and a second connecting substrate on which a second line for inputting the differential signal into the driver chip located at the terminating area, and wherein a termination resistor connects the second line for transmitting the differential signal which is formed on the second connecting substrate.Type: ApplicationFiled: April 8, 2008Publication date: December 25, 2008Applicant: NEC LCD Technologies, Ltd.Inventor: Setsuko Sato
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Patent number: 7465594Abstract: An active-matrix addressing substrate improves the degradation of initial alignment of liquid-crystal molecules caused by the steps or level differences due to the pixel electrodes and/or the common electrode. The pixel electrodes are formed on or over the first insulating layer and the common electrode is formed on the second or third insulating layer. The second insulating layer has steps or level differences due to the pixel electrodes in their vicinities. The second insulating layer is made of a dielectric material having fluidity prior to hardening, e.g., an acrylic resin. The steps of the second insulating layer are relaxed, resulting in the gently sloping steps. The steps of an overlying alignment layer due to the common electrode slope gently as well. The thickness of the pixel electrodes, the thickness and inclination angle of the second insulating layer, and the thicknesses of the pixel and common electrodes are defined.Type: GrantFiled: May 17, 2006Date of Patent: December 16, 2008Assignee: Nec LCD Technologies, Ltd.Inventor: Takayuki Konno
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Publication number: 20080296580Abstract: The present invention provides a high-performance silicon oxide film as a gate insulation film and a semiconductor device having superior electric characteristics. The silicon oxide film according to the present invention includes CO2 in the film, wherein, when an integrated intensity of a peak is expressed by (peak width at half height)×(peak height) in an infrared absorption spectrum, the integrated intensity of a CO2-attributed peak which appears in the vicinity of a wave number of 2,340 cm?1 is 8E-4 times or more with respect to the integrated intensity of an SiO2-attributed peak which appears in the vicinity of a wave number of 1,060 cm?1.Type: ApplicationFiled: June 2, 2008Publication date: December 4, 2008Applicant: NEC LCD TECHNOLOGIES, LTD.Inventors: Shigeru MORI, Hiroshi TANABE, Jun TANAKA
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Publication number: 20080297704Abstract: A liquid crystal display panel according to an exemplary aspect of the invention includes a pair of substrates, liquid crystal being arranged between the pair of substrates and spherical spacers being arranged between the pair of substrates. A partial area of at least one substrate of the pair of substrates is roughened, and each of the spherical spacers includes a plurality of projections on a surface thereof and is arranged on the roughened partial area.Type: ApplicationFiled: April 17, 2008Publication date: December 4, 2008Applicant: NEC LCD TECHNOLOGIES, LTD.Inventor: YOSHIAKI HASHIMOTO
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Patent number: 7459865Abstract: A cold cathode tube lighting device is provided which is capable of achieving stable luminance when driven by applying driving pulses to input terminals on both sides of each of two or more cold cathode tubes. Each of currents flowing through coils in each of coil units on both sides of each of two or more cold cathode tubes is detected by voltage detecting sections and a tube current flowing through each of the cold cathode tubes based on a value obtained by adding each of the currents using an adder and a duty ratio of each of driving pulses is controlled so that the tube current becomes a specified current value to keep the luminance of the cold cathode tubes constant.Type: GrantFiled: August 22, 2006Date of Patent: December 2, 2008Assignee: NEC LCD Technologies, Ltd.Inventor: Nobuaki Honbo
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Patent number: 7460190Abstract: An amorphous-silicon TFT (thin-film-transistor) in an LCD device has a larger channel length at both the edge portions of the channel of the TFT compared to the central portion of the channel by forming chamfers at the corners of the source and drain electrodes. The larger channel length at both the edge portions reduces the leakage current caused by the turned-around light incident onto the channel.Type: GrantFiled: August 20, 2004Date of Patent: December 2, 2008Assignee: NEC LCD Technologies, Ltd.Inventors: Yoshiaki Hashimoto, Shigeru Kimura, Seiji Suzuki
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Patent number: 7460198Abstract: An in-plane-switching-mode (IPS) LCD device includes a TFT substrate and a CF substrate sandwiching therebetween an LC layer, and a pair of polarizing films sandwiching therebetween the substrates and the LC layer. Each polarizing film has a polarization layer and a protective layer An optical compensation layer having a birefringence is disposed between the light-emitting-side polarizing film and the CF substrate. The optical compensation layer has an in-plane retardation of N1 satisfying the following relationship: 83.050?0.810×D1?N1??228.090?0.74D1 in the range of 0<D1?80 ?m, wherein D1 is the thickness of the protective layer of the light-incident-side polarizing film.Type: GrantFiled: December 8, 2004Date of Patent: December 2, 2008Assignee: NEC LCD Technologies, Ltd.Inventors: Hiroshi Nagai, Hidenori Ikeno
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Publication number: 20080291378Abstract: A transmittance control device which controls a transmittance factor, include a liquid crystal which is sandwiched with a pixel electrode and a common electrode; a control line which a predetermined control signal inputs; and an optical passive element which controls an electric potential difference on the pixel electrode and the common electrode by connecting with the control line, and the pixel electrode and changing a conduction state of the control line and the pixel electrode according to brightness of an incidence light.Type: ApplicationFiled: May 21, 2008Publication date: November 27, 2008Applicant: NEC LCD Technologies, Ltd.Inventor: Takeshi Sasaki
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Publication number: 20080291176Abstract: A display unit includes a display panel having a display screen on which images are displayed, and (b) a touch panel covering the display screen therewith and detecting a touch thereto made by a user. The touch panel detects the touch in accordance with touch-panel drive signals input thereto. The display panel displays images in accordance with display-drive signals input thereto. The touch panel is switched between a first condition in which the touch-panel drive signals are input into the touch panel and a second condition in which the touch panel is electrically open.Type: ApplicationFiled: February 1, 2008Publication date: November 27, 2008Applicant: NEC LCD TECHNOLOGIES, LTD.Inventor: Yukihiro ITO
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Publication number: 20080282500Abstract: A nozzle for sucking dust includes an opening part which is disposed at an end of the nozzle, and is sucking air to suck dust; and a turbulent air flow generating part which is disposed near the opening part to generates a turbulent air flow in the sucked air.Type: ApplicationFiled: August 8, 2007Publication date: November 20, 2008Applicant: NEC LCD TECHNOLOGIES, LTD.Inventor: Mitoshi Omagari
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Publication number: 20080285223Abstract: A display includes: a display panel including a display surface; a frame including a cover part which partially faces the display surface; and a film whose fixing area is fixed to the cover part and which is arranged between the display surface and the cover part. The cover part includes a flat part and a stepped part which projects toward the display surface, and the film comes in contact with the display surface to be bent.Type: ApplicationFiled: May 6, 2008Publication date: November 20, 2008Applicant: NEC LCD Technologies, LTD.Inventor: Hideaki Sugawara
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Publication number: 20080286890Abstract: 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 enType: ApplicationFiled: October 5, 2007Publication date: November 20, 2008Applicant: NEC LCD TECHNOLOGIES, LTD.Inventors: Hironori Kikkawa, Michiaki Sakamoto, Yuichi Yamaguchi, Hidenori Ikeno, Fumihiko Matsuno
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Publication number: 20080284958Abstract: A liquid-crystal display device makes it possible to attach an optical element to a liquid-crystal display panel with high positional accuracy while avoiding or minimizing the enlargement of the picture-frame region (i.e., the non-display region) induced by the formation of markers on the panel and the increase of the fabrication cost. The panel comprises a main substrate, an opposite substrate, and a liquid crystal enclosed in a gap between the main and opposite substrates, wherein a polarizer plate is attached at least to the opposite substrate. Markers for attaching an optical element to the panel are formed at positions that overlap with the polarizer plate in a non-display region on the main or opposite substrate. Alignment direction regulators regulate the alignment of the liquid crystal molecules to a predetermined direction in the vicinities of the markers, allowing light to pass through at least the opposite substrate.Type: ApplicationFiled: April 8, 2008Publication date: November 20, 2008Applicant: NEC LCD TECHNOLOGIES, LTD.Inventors: Tsutomu Hiroya, Koji Shigemura, Jin Matsushima
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Publication number: 20080283496Abstract: To provide a method for forming an etching structure without difficulty to control the manufacturing conditions, and with a minute dimension exceeding the limit of exposure, while suppressing increase of manufacturing processes and increasing of manufacturing cost.Type: ApplicationFiled: September 14, 2007Publication date: November 20, 2008Applicant: NEC LCD TECHNOLOGIES, LTD.Inventor: Shusaku KIDO
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Publication number: 20080284927Abstract: A liquid crystal display device includes an array of pixels each including a plurality of sub-pixels, a plurality of pixel electrodes disposed in the respective sub-pixels, and a plurality of common electrodes disposed in the respective sub-pixels. The common electrode disposed in each of the sub-pixels in one of the pixels on each row is connected to the common electrodes disposed in the corresponding sub-pixels in the others of the pixels on the each row, to form a group of common electrodes connected together.Type: ApplicationFiled: May 16, 2008Publication date: November 20, 2008Applicant: NEC LCD Technologies, Ltd.Inventors: Michiaki Sakamoto, Kenichi Mori
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Publication number: 20080284928Abstract: A liquid crystal display device includes an array of pixels each including a plurality of sub-pixels, a plurality of pixel electrodes disposed in the respective sub-pixels, and a plurality of common electrodes disposed in the respective sub-pixels. The common electrode disposed in each of the sub-pixels in one of the pixels on each row is connected to the common electrodes disposed in the corresponding sub-pixels in the others of the pixels on the each row, to form a group of common electrodes connected together.Type: ApplicationFiled: May 16, 2008Publication date: November 20, 2008Applicant: NEC LCD TECHNOLOGIES, LTDInventors: Michiaki SAKAMOTO, Kenichi MORI, Kenichirou NAKA, Hiroshi NAGAI
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Publication number: 20080280385Abstract: A thin-film transistor includes a gate layer, a gate insulting layer, a semiconductor layer, a drain layer, a passivation layer (each of which being formed on or over an insulating substrate), and a conductive layer formed on the passivation layer. The conductive layer is connected to the gate layer or the drain layer by way of a contact hole penetrating at least the passivation layer. The passivation layer has a multiple-layer structure comprising at least a first sublayer and a second sublayer stacked, the first sublayer having a lower etch rate than that of the second sublayer. The first sublayer is disposed closer to the substrate than the second sublayer. The second sublayer has a thickness equal to or less than that of the conductive layer. The shape or configuration of the passivation layer and the underlying gate insulating layer can be well controlled in the etching process, and the conductive layer formed on the passivation layer is prevented from being divided.Type: ApplicationFiled: July 14, 2008Publication date: November 13, 2008Applicant: NEC LCD TECHNOLOGIES, LTD.Inventor: Hiroaki Tanaka
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Patent number: 7450198Abstract: A reflection-type liquid crystal display according to the invention includes two glass substrates, a transparent electrode provided on one glass substrate, an insulator film which is provided on another glass substrate and on which an uneven structure is formed, a reflecting electrode provided on the insulator film, and a liquid crystal layer sandwiched between a side of the transparent electrode and a side of the reflecting electrode. The insulator film includes a first insulating layer in which a large number of depressions isolated as surrounded by protrusions are irregularly arranged and a second insulating layer covering the insulating layer entirely. The protrusions are all connected in a network, so that if some of these protrusions have weaker adherence with an underlying layer, they can be supported by the surrounding protrusions.Type: GrantFiled: June 29, 2006Date of Patent: November 11, 2008Assignees: NEC Corporation, NEC LCD Technologies, LtdInventors: Hiroshi Kanou, Yuichi Yamaguchi, Teruaki Suzuki, Hironori Kikkawa
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Publication number: 20080273139Abstract: A liquid crystal display device is provided, capable of minimizing deterioration in display quality of a liquid crystal panel due to external force generated by connection with an external chassis such as a customer's chassis. The liquid crystal display device has, at least, a front frame, a liquid crystal panel, and a backlight unit having at least a rear frame, arranged in this order. A back fixing frame to be fixed to the front frame is provided on the back face of the liquid crystal display device, and attachment portions to be attached to an external chassis are provided in the back fixing frame. This makes it difficult for external force generated by connection with the external chassis to be transmitted to the liquid crystal panel or the backlight unit, suppresses deformation of the liquid crystal panel or reflection sheet and prevents deterioration in display quality.Type: ApplicationFiled: April 25, 2008Publication date: November 6, 2008Applicant: NEC LCD TECHNOLOGIES, LTD.Inventors: Hideaki Sugawara, Yasushi Takada