Patents Assigned to NEC LCD Technologies, Ltd.
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Patent number: 8026880Abstract: 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: GrantFiled: August 29, 2007Date of Patent: September 27, 2011Assignee: NEC LCD Technologies, LtdInventors: Koji Mimura, Ken Sumiyoshi
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Patent number: 8023096Abstract: A manufacturing method of the liquid crystal display panel and a liquid crystal dripping device for the liquid crystal dripping and panel pasting method, by which residual moisture, gas constituents, and foreign substances mixed in the liquid crystal can be removed assuredly, and an occurrence of display fault can be suppressed, and can also improve display quality and a yield of the liquid crystal display panel, is provided. In this manufacturing method, prior to drip the liquid crystal on the substrate, pre-treatments, which combines suitably vacuum treatment which removes residual moisture and gas constituents from the liquid crystal maintaining the liquid crystal in a reduced pressure environment, filtration treatment which removes foreign substances from the liquid crystal, and heat treatment which heats the liquid crystal as required for carrying out distributed removal of the organic substances, are performed.Type: GrantFiled: February 2, 2010Date of Patent: September 20, 2011Assignee: NEC LCD Technologies, Ltd.Inventor: Toshihiko Motomatsu
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Patent number: 8023064Abstract: A LCD device includes a backlight unit, a shield front, and a display panel disposed between the backlight unit and the display panel. A flexible seal member is provided on the mounting surface of the backlight unit. After attachment of the shield front onto the mounting surface, the flexible seal member is deformed to press the edge surface of the display panel in the in-plane direction of the display panel.Type: GrantFiled: March 15, 2007Date of Patent: September 20, 2011Assignee: NEC LCD Technologies, Ltd.Inventor: Shin-ichirou Ono
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Patent number: 8018538Abstract: To increase the aperture ratio of a transflective liquid crystal display device and suppress a light leakage. Provided is a transflective liquid crystal display device that includes: within a unit pixel, a reflective area including a pixel electrode and a common electrode as a pair and a reflector, and a transmissive area including a pixel electrode and a common electrode as a pair; a liquid crystal layer provided to the reflective area and the transmissive area; storage capacitances for the reflective area and the transmissive area provided in a lower layer of the reflector for changing a potential of the pixel electrode by following a potential of the common electrode; and a suppressing device for suppressing a light leakage in the liquid crystal layer when the pixel electrode is affected by a potential of the reflector due to capacitance coupling generated between the reflector and the pixel electrode.Type: GrantFiled: April 8, 2008Date of Patent: September 13, 2011Assignee: NEC LCD Technologies, Ltd.Inventors: Kenichi Mori, Michiaki Sakamoto, Hiroshi Nagai, Kenichirou Naka
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Patent number: 8018556Abstract: 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)?0.5%.Type: GrantFiled: October 3, 2008Date of Patent: September 13, 2011Assignee: NEC LCD Technologies, LtdInventor: Hiroshi Nagai
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Patent number: 8013844Abstract: A lenticular lens is provided in front of a liquid crystal panel composed of a plurality of pixels. In this case, the lenticular lens is arranged so that one cylindrical lens corresponds to two pixels adjacent to each other. Then, light rays outgoing from two pixels are refracted by this one cylindrical lens and intersect with each other at a point positioned on the surface of a tablet, and then reach the right eye and the left eye of a user, respectively.Type: GrantFiled: September 8, 2010Date of Patent: September 6, 2011Assignee: NEC LCD Technologies, Ltd.Inventors: Naoyasu Ikeda, Shin-ichi Uehara, Nobuaki Takanashi
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Patent number: 8004490Abstract: An active-matrix bistable display panel is provided in which a pixel electrode is formed at each intersection of each of a plurality of scanning lines in a row direction and each of a plurality of signal lines in a column direction and a display state is made to occur depending on a voltage of each of the pixel electrodes, a signal-line driving unit is provided in which the plurality of signal lines is connected to a plurality of terminals and image inputs are sequentially divided into a plurality of image inputs and a plurality of image signals are supplied sequentially to the plurality of terminals in a time-division manner, and a scanning-line driving unit is provided in which each scanning line making up the plurality of groups is sequentially driven for each of the groups, wherein each of TFTs (Thin Film Transistors) is made active so as to supply an image voltage to each of pixel electrodes.Type: GrantFiled: March 29, 2006Date of Patent: August 23, 2011Assignee: NEC LCD Technologies, LtdInventors: Michiaki Sakamoto, Yuji Kondo, Nobuaki Honbo
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Patent number: 7995166Abstract: A display panel, a display device, and a terminal device, which can achieve a high image quality by decreasing deterioration of the image quality that may be caused due to combining a reflection plate including an uneven structure with an image distributing device, are provided. The display panel includes a lenticular lens for distributing light emitted from each of pixels towards different directions from each other along an arranging direction (a first direction) of a pixel for displaying an image for a first viewpoint and a pixel for displaying an image for a second viewpoint within a pixel unit, wherein a reflection plate including an uneven structure is formed in each of the pixels, and a layout pattern of the uneven structure on the reflection plate is different to the lenticular lens.Type: GrantFiled: November 14, 2007Date of Patent: August 9, 2011Assignee: NEC LCD Technologies, Ltd.Inventor: Shinichi Uehara
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Patent number: 7995172Abstract: An electrically-floating light shielding film is formed on a glass substrate, and a signal line is formed above the light shielding film via a gate insulating film. The light shielding film is formed along the signal line, and has a width larger than that of the signal line. On an interlayer insulating film that covers the signal line, transparent electrodes of neighboring pixels are formed, and a reflective electrode extending from the transparent electrode has a frame portion disposed along the signal line. The reflective electrode is formed the interlayer insulating film. The light shielding film does not overlap the transparent electrode in a plan-view perspective and overlaps the reflective portion in a plan-view perspective. The signal line does not overlap the reflective electrode in a plan-view perspective. Hence, a semitransparent liquid crystal display device that suppresses vertical crosstalk and as well maintains a high aperture ratio is obtained.Type: GrantFiled: May 31, 2007Date of Patent: August 9, 2011Assignee: NEC LCD Technologies, Ltd.Inventor: Toshiya Ishii
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Patent number: 7990501Abstract: A method for manufacturing a transflective type LCD having a first substrate provided thereon with a plurality of scanning lines and a plurality of signal lines which are substantially perpendicular to each other and a switching element arranged near each of intersections between said scanning lines and said signal lines, includes forming a reflection region having a reflection electrode film and a transmission region having a transparent electrode film in each pixel surrounded by said scanning lines and said signal lines, a liquid crystal being sandwiched at a gap between said first substrate and a second substrate which is arranged opposite to said first substrate, and forming an organic film having irregularities thereon below said reflection electrode film and said transparent electrode film to substantially the same film thickness.Type: GrantFiled: October 15, 2010Date of Patent: August 2, 2011Assignee: NEC LCD Technologies, Ltd.Inventors: Michiaki Sakamoto, Satoshi Ihida, Hidenori Ikeno, Masaki Shinohara, Shigeru Kimura, Kenji Morio, Kazurou Saeki
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Patent number: 7986390Abstract: Disclosed is an active matrix liquid crystal display device including substrates and a liquid crystal layer. The substrate includes: scan signal wiring lines; common signal wiring lines; video signal wiring lines intersecting these wiring lines; and pixels surrounded with the scan signal wiring lines and the video signal wiring lines. Each of pixels includes: a thin film transistor; source electrodes in a layer with the video signal wiring lines; pixel electrodes connected to the source electrodes; and common electrodes connected to the common signal wiring lines. The source electrodes include first parts overlapping the scan signal wiring lines and second parts connecting with the pixel electrodes, which are positioned around central parts between the video signal wiring lines. Molecular axes in the liquid crystal layer rotate under an electric field applied between the pixel electrodes and the common electrodes.Type: GrantFiled: March 19, 2010Date of Patent: July 26, 2011Assignee: NEC LCD Technologies, Ltd.Inventors: Takayuki Konno, Shinichi Nishida, Teruaki Suzuki, Yusuke Nogami
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Patent number: 7985466Abstract: A light control film including transparent layers and light absorbing layers arranged alternately is provided. The film is capable of controlling emission angle of light from the light source relatively strictly, and the light use efficiency thereof is improved. Further, a lighting device and a display device using thereof are provided. A transparent layer includes a high refractive index area and a low refractive index area, and further, a light reflective layer is provided at least on the light incident surface of the light absorbing layer out of the light absorbing layer and the low refractive index area. Thereby, a light control film having high light use efficiency is realized by utilizing reflection on the refractive index interface. At the same time, a lighting device capable of switching lighting angles and a display device capable of switching view angles, incorporating the control film, are realized.Type: GrantFiled: February 27, 2007Date of Patent: July 26, 2011Assignee: NEC LCD Technologies, LtdInventors: Goroh Saitoh, Masao Imai
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Patent number: 7982834Abstract: A liquid crystal display (LCD) device includes: a liquid crystal (LC) panel defining thereon an array of pixels each including a reflective area driven in a longitudinal electric field and a transmissive area driven in a lateral electric field; a quarter-wavelength retardation film disposed in the reflective area in front of a LC layer; and first and second polarizing films sandwiching therebetween the LC panel. The LC molecules in the LC layer have a major axis parallel or perpendicular to an optical axis of the first polarizing film disposed in front of the LC panel.Type: GrantFiled: August 4, 2008Date of Patent: July 19, 2011Assignee: NEC LCD Technologies, LtdInventors: Michiaki Sakamoto, Kenichi Mori
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Patent number: 7982820Abstract: A liquid crystal display includes a liquid crystal panel in the pixel electrode and common electrodes formed within a pixel comprise repeating structures. The angular range of light incident from the light source is narrower along a direction of the repeating structures than along an orthogonal direction.Type: GrantFiled: September 20, 2005Date of Patent: July 19, 2011Assignee: NEC LCD Technologies, Ltd.Inventors: Kouji Mimura, Ken Sumiyoshi
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Patent number: 7982835Abstract: A transflective liquid crystal display device is provided with a liquid crystal layer sandwiched between a first substrate with an array of switching elements and a second substrate with a black matrix so as to form a first area for a normally black display and a second area for a normally white display A first electric potential difference formed between the black matrix and both of the first common electrode and the first pixel electrode formed in the first area on the first substrate is made to be smaller than a larger one of the second electric potential difference formed between the black matrix and both of the second common electrode and the second pixel electrode formed in the second area.Type: GrantFiled: February 27, 2009Date of Patent: July 19, 2011Assignee: NEC LCD Technologies, Ltd.Inventors: Kenichirou Naka, Hiroshi Nagai, Michiaki Sakamoto, Kenichi Mori, Kousuke Shibata
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Patent number: 7981811Abstract: 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 24, 2009Date of Patent: July 19, 2011Assignees: NEC Corporation, NEC LCD Technologies, LtdInventors: Shigeru Mori, Takahiro Korenari, Tadahiro Matsuzaki, Hiroshi Tanabe
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Patent number: 7980714Abstract: 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: GrantFiled: October 16, 2008Date of Patent: July 19, 2011Assignee: NEC LCD Technologies, LtdInventor: Hideki Itaya
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Patent number: 7973749Abstract: A display device is composed of a light source device and a transmissive liquid crystal display panel, and the light source device is provided with a transparent/scattering switching element capable of switching between states in which incident light is transmitted or scattered. Pixels for displaying are disposed in the form of a matrix in the transmissive liquid crystal display panel, and the need for another power supply and signals for the transparent/scattering switching element is eliminated by driving the transparent/scattering switching element using the signals and power supply for driving the pixels. The drive power source of the transparent/scattering switching element for controlling scattering can be made smaller and less costly in a display device that is capable of switching the range of viewing angles.Type: GrantFiled: January 31, 2007Date of Patent: July 5, 2011Assignee: NEC LCD Technologies, Ltd.Inventors: Shin-ichi Uehara, Ken Sumiyoshi, Fujio Okumura
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Publication number: 20110157256Abstract: To display an image on an electronic paper display properly, even when image data is transmitted continuously from a host of the existing LCD display system, for example. A sampling section inputs a single image data by each prescribed period from a plurality of pieces of continuously transmitted image data corresponding to one screen of the electronic paper display. A difference detecting section detects a difference amount showing a difference between previous image data and latter image data of two pieces of consecutive image data inputted by the sampling section, and determines to perform screen update by using the latter image data when the difference value is equal to or larger than a threshold value. A driving section generates a driving signal of the latter image data and outputs the signal to the electronic paper display, when the screen update is determined by the difference detecting section.Type: ApplicationFiled: December 28, 2010Publication date: June 30, 2011Applicant: NEC LCD Technologies, Ltd.Inventor: Michiaki SAKAMOTO
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Patent number: 7969544Abstract: To provide a plural-viewpoint display device having an image separating optical element such as a lenticular lens or a parallax barrier, which is capable of arranging thin film transistors and wirings while achieving substantially trapezoid apertures and high numerical aperture, and to provide a driving method thereof, a terminal device, and a display panel. A neighboring pixel pair arranged with a gate line interposed therebetween is connected to the gate line placed between the pixels, each of the pixels configuring the neighboring pixel pair is connected to the data line different from each other, and each of the neighboring pixel pairs neighboring to each other in an extending direction of the gate lines is connected to the gate line different from each other.Type: GrantFiled: September 24, 2008Date of Patent: June 28, 2011Assignee: NEC LCD Technologies, Ltd.Inventors: Shinichi Uehara, Hidenori Ikeno, Tetsushi Satou