Patents Assigned to NEC LCD Technologies, Ltd.
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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: 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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Publication number: 20110176100Abstract: To provide a structure for achieving high transmittance in a lateral-electric-field mode liquid crystal display device through stably controlling the domains in the terminal parts of comb-shaped electrodes where the liquid crystal molecules rotate in the reverse direction. In the lateral-electric-field mode liquid crystal display device in which common electrodes and pixel electrodes are formed on a same layer, a protrusion part is provided in a direction in an obtuse angle with the comb-shaped electrode and substantially in parallel to a scan line in the terminal part of the comb-shaped electrode of the pixel electrode or the common electrode, a floating electrode is extended in the extending direction of the comb-shaped electrode to overlap with the comb-shaped electrode in the terminal part, and a liquid crystal reverse rotation locked structure is formed with the protrusion part of the comb-shaped electrode and the floating electrode.Type: ApplicationFiled: January 19, 2011Publication date: July 21, 2011Applicant: NEC LCD TECHNOLOGIES, LTD.Inventors: Shinichi NISHIDA, Takayuki KONNO, Taku KAWASAKI
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Publication number: 20110176312Abstract: An optical element manufacturing method according to the present invention includes: disposing a mask on a transparent photosensitive resin; patterning said transparent resin by applying an exposure light to said transparent photosensitive resin through said mask to form a transparent layer; forming a light absorbing layer by filling a gap in the transparent layer with a black curable resin; and illuminating a mask surface of the mask with the exposure light at an angle.Type: ApplicationFiled: February 7, 2011Publication date: July 21, 2011Applicant: NEC LCD TECHNOLOGIES, LTD.Inventors: Koji MIMURA, Ken SUMIYOSHI
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Publication number: 20110176096Abstract: A reflector for reflecting incident light from outside includes an insulating film being formed on a substrate and including multiple concavities and convexities, and a metal film formed on the insulating film. Respective convex portions constituting the multiple concavities and convexities are formed into shapes in which positions of peak portions relative to the entire convex portions are tilted in one direction when viewed from a direction of a normal line of the substrate.Type: ApplicationFiled: April 1, 2011Publication date: July 21, 2011Applicant: NEC LCD TECHNOLOGIES, LTDInventor: Kenichirou NAKA
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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: 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: 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: 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: 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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Publication number: 20110170038Abstract: A transflective liquid crystal display device includes a liquid crystal film and a polarizing plate on a backlight source side. A transflective liquid crystal display device includes an uniaxially anisotropic film (a quarter wave plate) and a polarizing plate on a visual confirmation side. The liquid crystal film has the nematic hybrid orientation, in which a polymeric liquid crystal substance formed in a liquid state is fixed. The optical axis of the anisotropic film is disposed to be orthogonal or substantially orthogonal to that of the liquid crystal film.Type: ApplicationFiled: March 23, 2011Publication date: July 14, 2011Applicant: NEC LCD TECHNOLOGIES, LTD.Inventor: Kenichirou Naka
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Publication number: 20110169789Abstract: A gate start pulse signal for a next frame is output at (m?n+k+1)-th line from a beginning of display period for a previous frame in a case where m denotes the number of the display lines, n denotes the number of extra outputs from the gate driver at a side from which the scan is performed, k denotes a positive integer, and a scan of a gate driver is performed from a side at which there is an extra output from the gate driver; k pulses of gate driver clock signals are output during a vertical blank period; and input of a gate driver clock signal is restarted from a beginning of a display period for the next frame.Type: ApplicationFiled: January 12, 2011Publication date: July 14, 2011Applicant: NEC LCD TECHNOLOGIES, LTD.Inventors: Shuji YAMAGUCHI, Hiroshi TAKEDA
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Publication number: 20110163669Abstract: A DC/AC inverter substrate includes a voltage abnormality detector circuit. All of a high voltage side detection sensor, a low voltage side detection sensor, and a high-voltage and low-voltage detection sensor in the voltage abnormality detector circuit are disposed without being electrically connected to a secondary side of a transformer or to a connection point. Those detection sensors are not damaged since overvoltage is not applied to the voltage abnormality detector circuit when abnormal discharge occurs because the detection sensors are not electrically connected.Type: ApplicationFiled: March 16, 2011Publication date: July 7, 2011Applicant: NEC LCD TECHNOLOGIES, LTD.Inventor: Yuuichi HASEGAWA
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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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Liquid crystal display panel, manufacturing method of the same, and liquid crystal display apparatus
Patent number: 7969524Abstract: A liquid crystal display panel includes a TFT connected to wiring equipped with an input terminal; a pixel electrode connected to the TFT; and a common electrode opposed to the pixel electrode, wherein an electrode spacing between the pixel electrode and the common electrode is adjusted depending on the amount of a signal degradation that arises from a signal flow from the input terminal through the wiring to the TFT.Type: GrantFiled: March 25, 2008Date of Patent: June 28, 2011Assignee: NEC LCD Technologies, Ltd.Inventor: Koji Kasuga -
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
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Patent number: 7965365Abstract: In an image display device where a lenticular lens, a display panel, and a light source are provided in order from a viewer side, when cylindrical lenses of the lenticular lens are arrayed in a horizontal direction, in first-viewpoint pixels and second-viewpoint pixels of the display panel, openings whose sides which intersect with straight lines in the horizontal direction are not parallel to a vertical direction are formed. And, a shape of the openings of a pair of pixels mutually adjacent in the vertical direction is made line-symmetric with respect to edges of the pixels extending in the horizontal direction as an axis.Type: GrantFiled: June 23, 2005Date of Patent: June 21, 2011Assignee: NEC LCD Technologies, LtdInventors: Shin-ichi Uehara, Masao Iriguchi, Naoyasu Ikeda, Nobuaki Takanashi
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Patent number: 7961276Abstract: In the liquid crystal display device of the present invention, a circular polarizer is provided to each of a pair of substrates that hold a liquid crystal layer, wherein the circular polarizer on the display surface side is composed of a polarizer, ?/2 plate in which Rth>0, and a ?/4 plate in which Rth<0; and the circular polarizer on the backlight side is composed of a polarizer, a ?/2 plate in which Rth<0, and a ?/4 plate in which Rth>0. Rth is a retardation in the thickness direction of a ?/2 plate or a ?/4 plate. A reduction is achieved in the absolute value of the sum of the Rth between the ?/2 plate for which Rth>0 and the ?/2 plate for which Rth<0, and in the absolute value of the sum of the Rth between the ?/4 plate for which Rth<0 and the ?/4 plate for which Rth>0.Type: GrantFiled: July 18, 2007Date of Patent: June 14, 2011Assignee: NEC LCD Technologies, Ltd.Inventors: Jin Matsushima, Ken Sumiyoshi, Shin-Ichi Uehara
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Patent number: 7956821Abstract: LCD unit includes first and second LCD panels stacked one on another. An image-data processing unit outputs monochrome image data to the second LCD panel, and color image data to the first LCD panel. The monochrome image data specifies a full transmission for a pixel having a luminance not less than a threshold, the original gray-scale level for a pixel having a luminance less than the threshold. The color image data is generated based on the monochrome image data and input image data.Type: GrantFiled: October 17, 2007Date of Patent: June 7, 2011Assignee: NEC LCD Technologies, Ltd.Inventors: Hidenori Ikeno, Takashi Yatsushiro