Patents by Inventor Kenji Nakao
Kenji Nakao has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20160170259Abstract: The elution of a color filter to a liquid crystal layer is reduced. A liquid crystal display device includes an active device substrate, a liquid crystal layer provided on the active device substrate, and a counter substrate provided on the liquid crystal layer. The active device substrate includes an active device, a common electrode, a common interconnection electrically connected to the common electrode, a reflection reduction film provided on the common interconnection, a first insulating layer provided on the reflection reduction film, and a pixel electrode having a flat portion provided on the first insulating layer and a first projecting portion protruding downwardly. The first the projecting portion is electrically connected to the active device.Type: ApplicationFiled: December 14, 2015Publication date: June 16, 2016Inventors: Osamu Itou, Kenji Nakao, Toshimasa Ishigaki, Masahiro Kosuge
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Publication number: 20160154273Abstract: In an embodiment, a color filter substrate includes an substrate, first to fifth lines, first to third switching elements, first to third electrodes, color filter layer between electrodes and the substrate, and insulating layer with first to third apertures. The first electrode is formed in a first area defined by lines at the first line side, and the second electrode is formed in the first area at the second line side. The third electrode is formed in a second area defined by lines. Electrodes are connected to switching elements through apertures respectively. The first aperture is formed at the first line side, and the second aperture is formed at the second line side.Type: ApplicationFiled: November 30, 2015Publication date: June 2, 2016Applicant: Japan Display Inc.Inventors: Osamu ITOU, Kenji NAKAO, Toshimasa ISHIGAKI, Daisuke SONODA
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Publication number: 20160116797Abstract: Disclosed is a liquid crystal display device including an active element substrate having an active element; a first layer provided on the active element and having a first hole formed therein, the first layer being one of a first insulating layer and a color filter; a second layer provided on the first layer and having a second hole formed therein, the second layer being the other of the first insulating layer and the color filter; a common electrode provided on the second layer; a second insulating layer having a plate-like portion provided on the common electrode and a first contact portion protruded downward; and a pixel electrode having a second contact portion protruded downward. The first contact portion is provided inside the second hole, and the second contact portion is provided inside the first hole and inside the second hole and electrically connected to the active element.Type: ApplicationFiled: October 27, 2015Publication date: April 28, 2016Inventors: Osamu ITOU, Kenji NAKAO, Toshimasa ISHIGAKI, Masahiro KOSUGE
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Patent number: 9314760Abstract: A continuous fixed-bed catalytic reactor includes an inflow path for raw material gas for a catalytic reaction and an outflow path for reformed gas, a catalytic reaction container that is connected to the inflow path and the outflow path and holds a clumpy catalyst, catalyst holders that have a ventilation property and hold the clumpy catalyst, and a driving mechanism that moves the clumpy catalyst up and down by moving the catalyst holders up and down.Type: GrantFiled: January 21, 2013Date of Patent: April 19, 2016Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Nobuaki Ito, Kimihito Suzuki, Kenichiro Fujimoto, Kenji Nakao
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Patent number: 9286842Abstract: A liquid crystal display device which includes a plurality of OCB liquid crystal pixels arrayed substantially in a matrix, and a driver circuit which cyclically writes a non-video signal and a video signal as a pixel voltage in each of the liquid crystal pixels. The liquid crystal display device further includes a control circuit which sets a first period and a second period different in length from the first period such that a total time length of the first period and the second period does not exceed one frame period, and controls the driver circuit to execute write of the non-video signal for the liquid crystal pixels in the first period and to execute write of the video signal for the liquid crystal pixels PX in the second period.Type: GrantFiled: September 26, 2006Date of Patent: March 15, 2016Assignee: JAPAN DISPLAY INC.Inventors: Yukio Tanaka, Kenji Nakao, Tetsuo Fukami, Kazuhiro Nishiyama
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Publication number: 20160004135Abstract: A provided is a liquid crystal display device with a high definition screen and less color mixture. On an array substrate, a pixel is formed between the adjacent video signal lines, a color filter is formed within the pixel, a flattening film is formed on the color filter, a lower layer is formed on the flattening film, and an upper layer having a slit is formed on the lower layer with an interlayer insulating film interposed therebetween; and on the array substrate, an opposite substrate is arranged with a liquid crystal layer interposed therebetween. When a distance from the top of the video signal line working as a light shielding film to the bottom of the liquid crystal layer is defined as d and a space between the centers of the video signal lines separating the pixel is defined as w, a relation of d?0.3 w is satisfied.Type: ApplicationFiled: July 2, 2015Publication date: January 7, 2016Inventors: Kenji NAKAO, Osamu Itou, Toshimasa Ishigaki, Daisuke Sonoda, Takato Hiratsuka
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Publication number: 20150356936Abstract: According to one embodiment, a display device includes an array substrate including pixel electrodes arranged in a matrix, gate lines and auxiliary capacitance lines extending a first direction, signal lines extending a second direction, and a driving circuit configured to drive the gate lines, the signal lines, and the auxiliary capacitance lines, a counter substrate arranged opposite the array substrate, a liquid crystal layer held between the substrates, and a controller configured to control the driving circuit in such a manner that a polarity of a signal supplied to each of the signal lines varies in units of horizontal periods during a frame period when the polarity control signal for the first scan is identical to the polarity control signal for the second scan.Type: ApplicationFiled: August 17, 2015Publication date: December 10, 2015Applicant: Japan Display Inc.Inventors: Yukio TANAKA, Daiichi SUZUKI, Kenji NAKAO
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Publication number: 20150287375Abstract: When an intermittent driving mode is carried out in a TFT using LIPS and ?-Si for a pixel transistor, a flicker easily occurs. A display device includes a TFT including a gate, a source, and a drain; a signal line connected to the source; a pixel capacitance connected to the drain; a first power supply configured to supply a potential that breaks electricity conducted between the source and the drain to the gate; and a switch configured to supply a potential of the first power supply to the gate. The display device includes a scan period and a dwell period. The switch is turned on in the scan period, and the switch is turned off in the dwell period.Type: ApplicationFiled: April 7, 2015Publication date: October 8, 2015Inventors: Yukio TANAKA, Daiichi SUZUKI, Kenji NAKAO
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Patent number: 9110319Abstract: According to one embodiment, an apparatus includes an array substrate including gate lines and auxiliary capacitance lines extending along a row, signal lines extending along a column, a semiconductor that intersects the gate line via an insulating layer and confronts the auxiliary capacitance line, a contact electrode for electrically connecting the semiconductor to the pixel electrode, a counter substrate, and a liquid crystal layer sandwiched between the substrates. In the pixels disposed side by side in a direction where the gate line extends, the positions of center of gravity of openings surrounded by the gate lines, the signal lines, the auxiliary capacitance line, and ends of the contact electrode are the same in a direction where the signal line extends.Type: GrantFiled: March 8, 2013Date of Patent: August 18, 2015Assignee: Japan Display Inc.Inventors: Yukio Tanaka, Kenji Nakao, Daiichi Suzuki
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Patent number: 9082360Abstract: A liquid crystal display device includes an array substrate, a counter substrate and a liquid crystal layer held between the array substrate and the counter substrate. A display portion having a plurality of pixels arranged in a matrix is formed of the substrates and the liquid crystal layer. Each of the pixels includes a pixel electrode and a counter electrode arranged opposing to the pixel electrode. A driving portion is formed on the array substrate to supply a pixel voltage to the pixel electrode. A correcting circuit is formed on the array substrate to correct the voltage supplied to the pixel electrode by adding a predetermined DC voltage to the voltage supplied to the pixel electrode corresponding to gradations to be displayed in the pixel.Type: GrantFiled: September 8, 2010Date of Patent: July 14, 2015Assignee: JAPAN DISPLAY INC.Inventors: Yukio Tanaka, Tetsuya Kawamura, Kenji Nakao, Atsushi Mizuyoshi, Kazutaka Fukushima, Kazuyuki Sunohara, Hidetaka Noriyama
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Publication number: 20150161966Abstract: A high-precision display device is capable of suppressing a leak current and operating at a low power consumption. The display device comprises a source power supply for providing a pixel electric potential to each pixel placed on a substrate through a first thin-film transistor; a gate power supply for controlling conductive and nonconductive states of the first thin-film transistor; and a second thin-film transistor disposed between the first thin-film transistor and the gate power supply, the second thin-film transistor being controllable independently of the first thin-film transistor.Type: ApplicationFiled: December 9, 2014Publication date: June 11, 2015Inventors: Kenji NAKAO, Yukio TANAKA, Daiichi SUZUKI
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Patent number: 9030635Abstract: According to one embodiment, a liquid crystal display device includes a first substrate, a second substrate and a liquid crystal layer. The first substrate includes a first electrode, a stage including an electrode formation surface, a switching element, a second electrode and a first vertical alignment film. The second substrate includes a third electrode and a second vertical alignment film. The electrode formation surface is positioned closer to the second substrate than a portion of the first vertical alignment film, which opposes the first electrode.Type: GrantFiled: September 13, 2013Date of Patent: May 12, 2015Assignee: Japan Display Inc.Inventors: Emi Higano, Mitsutaka Okita, Daiichi Suzuki, Kenji Nakao, Kazuhiro Nishiyama
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Publication number: 20150102988Abstract: According to one embodiment, a lateral electric-field type of liquid crystal display device includes a display panel and a controller, wherein a frame frequency falls within a range of 1 Hz to 10 Hz, an off-leak current of each of the TFTs has a value of 1×10?15 A or less, a resistivity of a liquid crystal and a resistivity of an alignment film both fall within one of a first range and a second range, the first range being 1×1013 to 5×1013 ?·cm, the second range being 5×1013 to 5×1014 ?·cm, and a relationship of “R1×C1?R2×C2” is satisfied, where R1 is a resistance and C1 is a capacity with respect to each pixel, R2 is a resistance and C2 is a capacity with respect to each pixel.Type: ApplicationFiled: October 9, 2014Publication date: April 16, 2015Applicant: Japan Display Inc.Inventors: Daiichi SUZUKI, Yukio TANAKA, Kenji NAKAO, Kazuhiro NISHIYAMA, Shinichi KOMURA, Shinichiro OKA, Mika OIWA
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Patent number: 8979607Abstract: According to one embodiment, there is provided a method of manufacturing a liquid crystal display panel, which includes preparing a pair of substrates including respective alignment films formed therein and subjected to photo alignment treatment, providing a sealing material on a frame area of the alignment film of one of the pair of substrates, and bonding the pair of substrates to each other with the sealing material, and curing the sealing material to form a sealing member, and forming a liquid crystal layer in space surrounded by the pair of substrates and the sealing member. The sealing material satisfies the following formula B?2000 [?m]/A.Type: GrantFiled: July 25, 2014Date of Patent: March 17, 2015Assignee: Japan Display Inc.Inventors: Toshiyuki Higano, Kenji Nakao
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Patent number: 8982040Abstract: In one embodiment, an array substrate includes a plurality of gate lines extending in a column direction. A lighting device includes a first lighting unit, a second lighting unit, and a lighting driver to light on and light off the first and second lighting units independently. The first lighting unit includes a first light source arranged on a scanning starting side of the gate lines. The second lighting unit includes a second light source arranged on a scanning terminating side of the gate lines. The lighting driver lights on the second lighting unit after lighting on the first lighting unit, and lights off the second lighting unit after lighting off the first lighting unit in a period between a starting time to write a first signal and a finishing time to write a second signal in the plurality of pixels.Type: GrantFiled: August 30, 2011Date of Patent: March 17, 2015Assignee: Japan Display Inc.Inventors: Kenji Nakao, Toshiyuki Higano, Jun Hanari
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Patent number: 8976100Abstract: According to one embodiment, a display includes pixel electrodes arranged in a matrix, gate lines extending along rows, signal lines extending along columns, storage capacitance lines extending along the rows to superpose a voltage on the pixel electrodes, a counterelectrode opposed to the pixel electrodes, a driver to drive the gate lines, the signal lines, and the storage capacitance lines, and a controller to control the driver. The controller sequentially drives the gate lines to write from the signal lines to the pixel electrodes and, after the write to the pixel electrodes, changes a potential of each of the storage capacitance lines to cause alignment of the liquid crystal layer to make a transition from splay alignment to bend alignment.Type: GrantFiled: December 3, 2012Date of Patent: March 10, 2015Assignee: Japan Display Inc.Inventors: Yukio Tanaka, Daiichi Suzuki, Kenji Nakao
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Publication number: 20150044933Abstract: According to one embodiment, there is provided a method of manufacturing a liquid crystal display panel, which includes preparing a pair of substrates including respective alignment films formed therein and subjected to photo alignment treatment, providing a sealing material on a frame area of the alignment film of one of the pair of substrates, and bonding the pair of substrates to each other with the sealing material, and curing the sealing material to form a sealing member, and forming a liquid crystal layer in space surrounded by the pair of substrates and the sealing member. The sealing material satisfies the following formula B?2000 [?m]/A.Type: ApplicationFiled: July 25, 2014Publication date: February 12, 2015Applicant: Japan Display Inc.Inventors: Toshiyuki HIGANO, Kenji NAKAO
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Publication number: 20150035816Abstract: According to one embodiment, a lateral electric-field type of liquid crystal display device includes a display panel including a plurality of liquid crystal pixels arranged in a matrix, and a controller configured to perform intermittent driving to rewrite an image signal to the liquid crystal pixels, wherein a frame frequency falls within a range of 10 Hz to 20 Hz, and an absolute value of a flexo coefficient (e11, e33) of a liquid crystal applied to the liquid crystal pixels is 1.6 pC/m or less.Type: ApplicationFiled: August 1, 2014Publication date: February 5, 2015Applicant: Japan Display Inc.Inventors: Daiichi SUZUKI, Yukio Tanaka, Kenji Nakao, Kazuhiro Nishiyama, Shinichi Komura, Shinichiro Oka, Mika Oiwa
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Publication number: 20150010467Abstract: A continuous fixed-bed catalytic reactor includes an inflow path for raw material gas for a catalytic reaction and an outflow path for reformed gas, a catalytic reaction container that is connected to the inflow path and the outflow path and holds a clumpy catalyst, catalyst holders that have a ventilation property and hold the clumpy catalyst, and a driving mechanism that moves the clumpy catalyst up and down by moving the catalyst holders up and down.Type: ApplicationFiled: January 21, 2013Publication date: January 8, 2015Inventors: Nobuaki Ito, Kimihito Suzuki, Kenichiro Fujimoto, Kenji Nakao
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Publication number: 20140375535Abstract: According to one embodiment, a liquid crystal display device includes a first substrate, a second substrate, a liquid crystal layer, a driver and a control circuit. The control circuit is configured to cause the driver to carry out one of an ordinary driving and an intermittent driving, which is set by switching. The control circuit supplies signals to a plurality of pixel electrodes of each of columns of the pixel electrodes in each of frame periods in the intermittent driving, the supplied signals having polarities inverted in units of at least one row.Type: ApplicationFiled: June 3, 2014Publication date: December 25, 2014Applicant: Japan Display Inc.Inventors: Yukio TANAKA, Daiichi SUZUKI, Kenji NAKAO