Patents Assigned to NEC LCD Technologies, Ltd.
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Publication number: 20130314654Abstract: A transflective LCD unit includes a liquid crystal (LC) layer: first and second substrates sandwiching therebetween the LC layer to define an array of pixels each including a reflective area and a transmissive area; an electrode assembly for driving the LC layer such that the LC layer in the reflective area is driven in a longitudinal-electric-field mode and the LC layer in the transmissive area is driven in a lateral-electric-field mode; and a reverse-tilt control member for controlling a reverse tilt area in which a reverse tilt of LC molecules occurs near the boundary between the reflective area and the transmissive area.Type: ApplicationFiled: July 31, 2013Publication date: November 28, 2013Applicant: NEC LCD Technologies, Ltd.Inventors: Kenichi MORI, Michiaki SAKAMOTO, Hiroshi NAGAI
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Publication number: 20130182208Abstract: A liquid crystal display device of IPS mode includes an array of pixels arranged in a matrix pattern by crossing a plurality of video signal lines and a plurality of scanning signal lines each other. Each of the pixels is provided with at least a switching element. A transparent insulating film is provided on both signal lines, and a plurality of pixel electrodes, common electrodes and common lines are provided on the transparent insulating film. The common lines are formed in a grid-shaped pattern such that a first group of the common lines is made of a first conductor having lower reflectivity against optical light than that of metal while a second group of the common lines is made of a second conductor including a metal layer such that said first group and said second group are crossing each other along said video signal lines and said scanning signal lines.Type: ApplicationFiled: March 4, 2013Publication date: July 18, 2013Applicant: NEC LCD TECHNOLOGIES, LTD.Inventor: NEC LCD Technologies, Ltd.
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Patent number: 8449072Abstract: An ink mixed with spacer members is ejected onto one or both of a TFT substrate and a CF substrate while an ink jet head having a plurality of ink jet nozzles is moved. The excursions of a predetermined number of ink jet nozzles from an end of the ink jet head overlap those of a next excursion of the ink jet head without causing overlapping of ejected ink within the overlapping area. An abrupt stepwise change in the amount of ejected ink is suppressed whereby an uneven gap is suppressed.Type: GrantFiled: August 31, 2011Date of Patent: May 28, 2013Assignee: NEC LCD Technologies, Ltd.Inventor: Hisashi Kuwata
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Publication number: 20130107179Abstract: An active matrix liquid crystal display device of the invention includes a liquid crystal display panel operating in a normally black mode having a first substrate provided with a color filter and a second substrate provided with an active matrix array, wherein the first substrate is provided with a laminated colored layer with three colors, a laminated colored layer with two colors and a colored layer with one color in a frame part surrounding a display area without being provided with a black matrix, and the second substrate is provided with a conductive film formed in a region which is opposed to the laminated colored layer with two colors and the colored layer with one color, between the display area and the laminated colored layer with three colors.Type: ApplicationFiled: December 19, 2012Publication date: May 2, 2013Applicant: NEC LCD TECHNOLOGIES, LTD.Inventor: NEC LCD Technologies, Ltd.
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Publication number: 20130093988Abstract: 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: December 10, 2012Publication date: April 18, 2013Applicant: NEC LCD TECHNOLOGIES, LTD.Inventor: NEC LCD Technologies, Ltd.
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Patent number: 8411233Abstract: A light shield member in a LCD unit includes a first shield section that includes a pile of two color filter patterns and separates each effective opening of pixel from an effective opening of the adjacent pixel, and a second shield section that includes a pile of three color filter patterns and shields a TFT area including a TFT and the vicinity thereof.Type: GrantFiled: August 15, 2012Date of Patent: April 2, 2013Assignee: NEC LCD Technologies, Ltd.Inventors: Sounosuke Takahashi, Teruaki Suzuki, Shinichi Nishida, Yoshikazu Sakaguchi, Yoichi Sasaki
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Publication number: 20130077316Abstract: A display device comprising a light source and having an optical waveguide, a louver, an anisotropic scattering sheet, and a transmissive liquid crystal panel disposed along the path of light emitted from the light source. The light-restricting direction of the louver is tilted at an angle ? from the Y-axis direction. The value of the angle ? is set so that the arrangement direction of moiré created between the louver and the liquid crystal panel approaches the X-axis direction. A plurality of belt-shaped convex portions extending in the Y-axis direction are formed on the surface of the anisotropic scattering sheet, and are configured so that the scattering direction of the light has anisotropy. Specifically, scattering in the X-axis direction is increased, and scattering in the Y-axis direction is reduced. Moiré can thereby be reduced in a display device having increased directivity of the display.Type: ApplicationFiled: November 21, 2012Publication date: March 28, 2013Applicants: NEC LCD Technologies, Ltd., NEC CorporationInventors: NEC Corporation, NEC LCD Technologies, Ltd.
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Publication number: 20130069097Abstract: The present invention provides a thin-film transistor manufactured on a transparent substrate having a structure of a top gate type crystalline silicon thin-film transistor in which a light blocking film, a base layer, a crystalline silicon film, a gate insulating film, and a gate electrode film arranged not to overlap at least a channel region are sequentially formed on the transparent substrate; wherein the channel region having channel length L, LDD regions having LDD length d on both sides of the channel region, a source region, and a drain region are formed in the crystalline silicon film; the light blocking film is divided across the channel region; and interval x between the divided light blocking films is equal to or larger than channel length L and equal to or smaller than a sum of channel length L and a double of LDD length d (L+2d). Thereby, the cost for manufacturing the thin-film transistor is low, and the photo leak current of the thin-film transistor is suppressed.Type: ApplicationFiled: November 14, 2012Publication date: March 21, 2013Applicant: NEC LCD TECHNOLOGIES, LTD.Inventor: NEC LCD TECHNOLOGIES, LTD.
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Publication number: 20130057810Abstract: 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: October 31, 2012Publication date: March 7, 2013Applicant: NEC LCD TECHNOLOGIES, LTD.Inventor: NEC LCD Technologies, Ltd.
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Patent number: 8389345Abstract: To achieve TFT having a high light-resistance characteristic with a suppressed light leak current at low cost by simplifying the manufacturing processes. The TFT basically includes: a light-shielding film formed on a glass substrate that serves as an insulating substrate; an insulating film formed on the light-shielding film; a semiconductor film formed on the insulating film; and a gate insulating film formed on the semiconductor film. Each layer of a laminate that is configured with three layers of the light-shielding film, the insulating film, and the semiconductor film is patterned simultaneously. Further, each layer of the laminate is configured with silicon or a material containing silicon.Type: GrantFiled: November 26, 2010Date of Patent: March 5, 2013Assignee: NEC LCD Technologies, Ltd.Inventor: Hiroshi Tanabe
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Publication number: 20120325776Abstract: The 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 gas-applying unit for applying gas atmosphere to the substrate.Type: ApplicationFiled: September 5, 2012Publication date: December 27, 2012Applicant: NEC LCD TECHNOLOGIES, LTD.Inventor: Shusaku KIDO
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Patent number: 8325303Abstract: 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: GrantFiled: October 24, 2011Date of Patent: December 4, 2012Assignee: NEC LCD Technologies, Ltd.Inventors: Tsutomu Hiroya, Koji Shigemura, Jin Matsushima
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Publication number: 20120182204Abstract: A LCD unit includes a plurality of LC panels stacked one on another. If a picture to be displayed on the LCD unit is a still picture, one of the LC panels consecutively scans plurality of rows of pixels in a direction opposite to the scanning direction of the rows of pixels in the rest of LC panels. If the picture is a moving picture, all the LC panels consecutively scans in the same direction.Type: ApplicationFiled: March 19, 2012Publication date: July 19, 2012Applicant: NEC LCD TECHNOLOGIES, LTD.Inventors: Hidenori IKENO, Takashi YATSUSHIRO
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Publication number: 20120182504Abstract: An active matrix liquid crystal display device of the invention includes a liquid crystal display panel operating in a normally black mode having a first substrate provided with a color filter and a second substrate provided with an active matrix array, wherein the first substrate is provided with a laminated colored layer with three colors, a laminated colored layer with two colors and a colored layer with one color in a frame part surrounding a display area without being provided with a black matrix, and the second substrate is provided with a conductive film formed in a region which is opposed to the laminated colored layer with two colors and the colored layer with one color, between the display area and the laminated colored layer with three colors.Type: ApplicationFiled: March 27, 2012Publication date: July 19, 2012Applicant: NEC LCD TECHNOLOGIES, LTD.,Inventors: Shinichi NISHIDA, Hideki ITOU, Teruaki SUZUKI, Sounosuke TAKAHASHI, Yoshikazu SAKAGUCHI
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Publication number: 20120176051Abstract: There is provided a display area made up of a pixel array with a non-rectangular shaped outer circumference and the pixel array is made up of a plurality of non-rectangular pixels wherein a first conductor line group including a plurality of first conductor lines and a second conductor line group including a plurality of second conductor lines, and a third conductor line group including a plurality of third conductor lines are arranged so as to intersect with one another. Thus, without sacrificing brightness, viewability, and fidelity of an image, pixel array (display device) with the non-rectangular outer circumferential shape being excellent in design characteristics is realized.Type: ApplicationFiled: March 16, 2012Publication date: July 12, 2012Applicant: NEC LCD TECHNOLOGIES, LTD.Inventor: Kenichi TAKATORI
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Publication number: 20120127068Abstract: In a semiconductor circuit a floating node is set to any voltage by utilizing a control signal applied to a refresh terminal and has a period shorter than that of a clock signal. The circuit includes first and second transistors connected between a first clock terminal and first power supply terminal, third and fourth transistors connected between the refresh terminal and the first power supply terminal, and fifth and sixth transistors connected between a second power supply terminal and the first power supply. Gates of the fourth and fifth transistors are connected to an input terminal, a gate of the third transistor is connected to a second clock terminal, a gate of the first transistor is connected to a node between the fifth and sixth transistors, gates of the second and sixth transistors are connected, and a node between the first and second transistors is connected to an output terminal.Type: ApplicationFiled: January 31, 2012Publication date: May 24, 2012Applicant: NEC LCD Technologies, Ltd.Inventor: Tomohiko OTOSE
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Publication number: 20120105775Abstract: In an LCD device, a circular polarizer is provided to each of two substrates that hold a liquid crystal layer. The circular polarizer on the display surface side includes a polarizer, ?/2 plate in which Rth>0, and a ?/4 plate in which Rth<0; and the circular polarizer on the backlight side includes 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. 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 is reduced, 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: ApplicationFiled: May 3, 2011Publication date: May 3, 2012Applicants: NEC LCD TECHNOLOGIES, LTD., NEC CORPORATIONInventors: Jin MATSUSHIMA, Ken SUMIYOSHI, Shin-ichi UEHARA
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Publication number: 20120091925Abstract: A display device is provided including an optical waveguide, and a light source, and also a louver, a transparent/scattering state switching element, and a transmissive liquid crystal display panel, provided in order on the side of a light-emitting surface of the optical waveguide. The transparent/scattering state switching element switches between a state for scattering the incident light and a state for transmitting the light without scattering. The light source drive circuit causes the transparent/scattering state switching element to transfer from the transparent state to the scattering state, and when the viewing angle range of the display is switched from narrow to wide, the intensity of the light source is gradually increased in conjunction with the transition state of the transparent/scattering state switching element.Type: ApplicationFiled: October 20, 2011Publication date: April 19, 2012Applicant: NEC LCD TECHNOLOGIES, LTDInventors: Shinichi UEHARA, Ken SUMIYOSHI, Fujio OKUMURA
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Publication number: 20120092385Abstract: 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 to input image data.Type: ApplicationFiled: April 8, 2011Publication date: April 19, 2012Applicant: NEC LCD TECHNOLOGIES, LTD.Inventors: Hidenori IKENO, Takashi YATSUSHIRO
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Patent number: 8149359Abstract: 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: July 18, 2011Date of Patent: April 3, 2012Assignee: NEC LCD Technologies, LtdInventor: Shinichi Uehara