Patents Assigned to NEC LCD Technologies
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Patent number: 7528911Abstract: 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: GrantFiled: April 24, 2007Date of Patent: May 5, 2009Assignee: NEC LCD Technologies, Ltd.Inventor: Yasuki Kudo
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Publication number: 20090109202Abstract: A liquid crystal display device according to an exemplary aspect of the invention includes a thin film transistor (TFT) substrate having a substrate and a display pixel arranged in a matrix form on the substrate, a counter substrate opposed to the TFT substrate, the pixel electrode and the first surface common electrode are arranged so that an electric field along a principal plane of said TFT substrate can be applied to the liquid crystal, a second surface common electrode is formed on the counter substrate, a same common electric potential is inputted into the second surface common electrode as well as into the first surface common electrode, the second surface common electrode is opposed to the first surface common electrode, and the second surface common electrode is arranged so that an electric field along a principal plane of the counter substrate can be applied to the liquid crystal.Type: ApplicationFiled: October 28, 2008Publication date: April 30, 2009Applicant: NEC LCD TECHNOLOGIES, LTD.Inventor: Yoshiro KITAGAWA
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Publication number: 20090109169Abstract: To provide a liquid crystal display device capable of switching the range of viewing angles while being able to reduce the cost and thickness of the device, and to provide an electronic appliance having the same. The display device according to the present invention includes: a liquid crystal type display panel having a diffusive reflection part which diffusively reflects light irradiated from the front side while transmitting light from the back side; and a backlight source disposed on a back face of the display panel along the display panel for switchably outputting transmission light of different directivities.Type: ApplicationFiled: October 29, 2008Publication date: April 30, 2009Applicant: NEC LCD TECHNOLOGIES, LTD.Inventors: Ken SUMIYOSHI, Koji Mimura, Yuji Kondo, Masatake Baba
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Publication number: 20090109356Abstract: A liquid crystal display device of the present invention includes a TFT substrate having a substrate and a display pixel arranged in a matrix form on the substrate, a counter substrate opposed to the TFT substrate and being stuck therewith and a liquid crystal enclosed between the TFT substrate and the counter substrate, the pixel electrode and the first common electrode are arranged so that an electric field along a principal plane of the TFT substrate can be applied to the liquid crystal, a second common electrode for inputting a common electric potential is formed on the counter substrate, the second common electrode is opposed to the first common electrode, and a conduction part for electrically connecting the second common electrode and the first common electrode mutually and transmitting the common electric potential to the first common electrode is formed near each display pixel or near a predetermined display pixel.Type: ApplicationFiled: October 28, 2008Publication date: April 30, 2009Applicant: NEC LCD TECHNOLOGIES, LTD.Inventor: Yoshiro KITAGAWA
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Publication number: 20090109247Abstract: 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: ApplicationFiled: October 22, 2008Publication date: April 30, 2009Applicant: NEC LCD Technologies, Ltd.Inventor: Hiroaki KIMURA
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Publication number: 20090103035Abstract: A lateral electric field type active-matrix addressing liquid crystal display device suppresses the lateral cross talk induced by the coupling capacitances (i.e., the parasitic capacitances) between the drain bus lines and the common bus line corresponding thereto with a simple structure. In each of the pixel electrodes, at least one electrically isolated light-shielding electrode is formed to extend along the drain bus lines that define the pixel electrode near the same drain bus lines. The light-shielding electrode is overlapped with a part of a corresponding one of the pixel electrodes to the pixel region in such a way that an insulating film intervenes between the light-shielding electrode and the part, the part extending along these drain bus lines in the vicinities thereof. The light-shielding electrode may be electrically connected to the corresponding one of the pixel electrodes at a point in the pixel region.Type: ApplicationFiled: October 10, 2008Publication date: April 23, 2009Applicant: NEC LCD TECHNOLOGIES, LTD.Inventors: Teruaki Suzuki, Shinichi Nishida
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Publication number: 20090103283Abstract: To provide a liquid crystal display backlight and a liquid crystal display device, which can improve the heat dissipating effect, can reduce the thickness and weight of the device. The liquid crystal display backlight includes: an emission light guide plate for emitting illuminating light for a liquid crystal display panel from one face; one and other mixed-color light guides mounted on a same plane of other face of the emission light guide plate via a spacer; a heat-dissipating spatial area provided between the mixed-color light guide plates; light-emitting devices disposed within the heat-dissipating spatial area; and reflectors for guiding output light, propagated inside each mixed-color light guide plate, towards corresponding end faces of the emission light guide plate from outside end face of each mixed-color light guide plate. A holding plate for holding the light-emitting devices is provided, facing each mixed-color light guide plate with an airing gap provided therebetween.Type: ApplicationFiled: October 17, 2008Publication date: April 23, 2009Applicant: NEC LCD TECHNOLOGIES, LTD.Inventor: Masatake BABA
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Publication number: 20090102769Abstract: 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: ApplicationFiled: October 21, 2008Publication date: April 23, 2009Applicant: NEC LCD Technologies, Ltd.Inventors: Makoto KOUNO, Hiroaki Kimura
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Publication number: 20090103282Abstract: 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: ApplicationFiled: October 16, 2008Publication date: April 23, 2009Applicant: NEC LCD Technologies, Ltd.,Inventor: Hideki ITAYA
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Patent number: 7520655Abstract: 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: GrantFiled: September 26, 2006Date of Patent: April 21, 2009Assignee: NEC LCD Technologies, Ltd.Inventor: Shizuo Morishita
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Patent number: 7522254Abstract: 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: GrantFiled: July 12, 2005Date of Patent: April 21, 2009Assignee: NEC LCD TechnologiesInventors: Hironori Kikkawa, Michiaki Sakamoto, Yuichi Yamaguchi, Hidenori Ikeno, Fumihiko Matsuno
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Publication number: 20090096726Abstract: 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 achieving a high image quality by suppressing deterioration in the display image quality caused when a block division driving method is employed, and to provide a terminal device, a display panel, and a driving method thereof, which can be preferably used for those devices. A pixel group configured with pixels for displaying a right-eye image includes a pixel connected to a data line phase-deployed in the first phase of a block division driving method, and a pixel connected to a data line phase-deployed in the third phase, and a pixel connected to a data line phase-deployed in the second phase. In this manner, it is designed to have no deviation in the phase deployment orders in the pixel groups for each viewpoint.Type: ApplicationFiled: October 15, 2008Publication date: April 16, 2009Applicant: NEC LCD TECHNOLOGIES, LTD.Inventors: Shinichi Uehara, Tetshushi Satou
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Publication number: 20090096943Abstract: 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: ApplicationFiled: September 24, 2008Publication date: April 16, 2009Applicant: NEC LCD TECHNOLOGIES, LTD.Inventors: SHINICHI UEHARA, Hidenori Ikeno, Tetsushi Satou
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Patent number: 7518680Abstract: 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: GrantFiled: December 1, 2006Date of Patent: April 14, 2009Assignee: NEC LCD Technologies, Ltd.Inventors: Kunimasa Itakura, Eriko Fujimaki
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Patent number: 7518667Abstract: 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: GrantFiled: August 1, 2005Date of Patent: April 14, 2009Assignee: NEC LCD Technologies, Ltd.Inventors: Takuya Asai, Syouichi Kuroha, Takeshi Sasaki
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Patent number: 7518586Abstract: 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: GrantFiled: August 10, 2001Date of Patent: April 14, 2009Assignee: NEC LCD Technologies, Ltd.Inventor: Shunichi Hosoyamada
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Patent number: 7517464Abstract: 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: GrantFiled: April 4, 2006Date of Patent: April 14, 2009Assignee: NEC LCD Technologies, Ltd.Inventors: Hidekazu Matsushita, Tsuyoshi Katoh, Satoshi Doi, Akitoshi Maeda
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Patent number: 7518589Abstract: 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: GrantFiled: March 4, 2005Date of Patent: April 14, 2009Assignee: NEC LCD Technologies, Ltd.Inventor: Hiroshi Takeda
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Patent number: 7518690Abstract: 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: GrantFiled: May 24, 2007Date of Patent: April 14, 2009Assignee: NEC LCD Technologies, Ltd.Inventor: Manabu Komaju
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Publication number: 20090091692Abstract: 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: ApplicationFiled: October 3, 2008Publication date: April 9, 2009Applicant: NEC LCD Technologies, Ltd.Inventor: Hiroshi NAGAI