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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Patent number: 9804435Abstract: A color filter substrate includes an insulating substrate, a first pixel electrode, a second pixel electrode, a third pixel electrode, a first color filter disposed between the first pixel electrode and the insulating substrate, a second color filter disposed between the second pixel electrode and the insulating substrate, and a third color filter disposed between the third pixel electrode and the insulating substrate, wherein the first pixel electrode, the second pixel electrode, and the third pixel electrode are adjacent to each other, the first color filter has a first end, the second color filter has a second end, and the third color filter has a third end, and two of the first end, the second end, and the third end overlap in the first overlap area.Type: GrantFiled: December 10, 2015Date of Patent: October 31, 2017Assignee: Japan Display Inc.Inventors: Osamu Itou, Kenji Nakao, Toshimasa Ishigaki, Daisuke Sonoda
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Publication number: 20170229058Abstract: 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: April 25, 2017Publication date: August 10, 2017Inventors: Kenji NAKAO, Yukio TANAKA, Daiichi SUZUKI
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Patent number: 9690131Abstract: 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: GrantFiled: December 14, 2015Date of Patent: June 27, 2017Assignee: Japan Display Inc.Inventors: Osamu Itou, Kenji Nakao, Toshimasa Ishigaki, Masahiro Kosuge
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Patent number: 9666150Abstract: 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: GrantFiled: December 9, 2014Date of Patent: May 30, 2017Assignee: Japan Display Inc.Inventors: Kenji Nakao, Yukio Tanaka, Daiichi Suzuki
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Publication number: 20170139299Abstract: 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?0.3w is satisfied.Type: ApplicationFiled: January 31, 2017Publication date: May 18, 2017Inventors: Kenji NAKAO, Osamu ITOU, Toshimasa ISHIGAKI, Daisuke SONODA, Takato HIRATSUKA
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Patent number: 9601071Abstract: 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: GrantFiled: October 9, 2014Date of Patent: March 21, 2017Assignee: Japan Display Inc.Inventors: Daiichi Suzuki, Yukio Tanaka, Kenji Nakao, Kazuhiro Nishiyama, Shinichi Komura, Shinichiro Oka, Mika Oiwa
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Patent number: 9594278Abstract: 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: GrantFiled: July 2, 2015Date of Patent: March 14, 2017Assignee: Japan Display Inc.Inventors: Kenji Nakao, Osamu Itou, Toshimasa Ishigaki, Daisuke Sonoda, Takato Hiratsuka
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Patent number: 9552784Abstract: 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: GrantFiled: August 1, 2014Date of Patent: January 24, 2017Assignee: Japan Display Inc.Inventors: Daiichi Suzuki, Yukio Tanaka, Kenji Nakao, Kazuhiro Nishiyama, Shinichi Komura, Shinichiro Oka, Mika Oiwa
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Publication number: 20170004793Abstract: 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: July 7, 2016Publication date: January 5, 2017Applicant: Japan Display Inc.Inventors: Daiichi SUZUKI, Yukio TANAKA, Kenji NAKAO, Kazuhiro NISHIYAMA, Shinichi KOMURA, Shinichiro OKA, Mika OIWA
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Publication number: 20160307527Abstract: 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 28, 2016Publication date: October 20, 2016Applicant: Japan Display Inc.Inventors: Yukio TANAKA, Daiichi SUZUKI, Kenji NAKAO
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Publication number: 20160299395Abstract: A display device includes a first light shielding part provided between a filter film and a first electrode, and a second light shielding part provided on a second substrate. First and second filter films each have long sides that extend in a first direction in which a video signal line extends, and the first and the second filter films are arranged adjacent to each other in a second direction different from the first direction. The first light shielding part overlaps the video signal line in a plan view. The second light shielding part overlaps a metal electrode in the plan view.Type: ApplicationFiled: March 31, 2016Publication date: October 13, 2016Applicant: Japan Display Inc.Inventors: Masahiro KOSUGE, Kenji Nakao, Osamu Itou
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Publication number: 20160284291Abstract: According to one embodiment, a liquid crystal display device includes an array substrate, a counter substrate, a liquid crystal layer and a driving unit. The driving unit is configured to perform polarity inversion driving by applying, to the pixel electrode, positive and negative video signals. When applying the video signals to the pixel electrode, the driving unit superposes a correction signal corresponding to a polarity inversion frequency and the gray level on the video signals in advance.Type: ApplicationFiled: June 8, 2016Publication date: September 29, 2016Applicant: Japan Display Inc.Inventors: Yukio Tanaka, Toshiyuki Higano, Kenji Nakao, Hirofumi Wakemoto
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Patent number: 9406270Abstract: 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: GrantFiled: June 3, 2014Date of Patent: August 2, 2016Assignee: Japan Display Inc.Inventors: Yukio Tanaka, Daiichi Suzuki, Kenji Nakao
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Patent number: 9390673Abstract: According to one embodiment, a liquid crystal display device includes an array substrate, a counter substrate, a liquid crystal layer and a driving unit. The driving unit is configured to perform polarity inversion driving by applying, to the pixel electrode, positive and negative video signals. When applying the video signals to the pixel electrode, the driving unit superposes a correction signal corresponding to a polarity inversion frequency and the gray level on the video signals in advance.Type: GrantFiled: September 20, 2013Date of Patent: July 12, 2016Assignee: Japan Display Inc.Inventors: Yukio Tanaka, Toshiyuki Higano, Kenji Nakao, Hirofumi Wakemoto
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Publication number: 20160178963Abstract: A color filter substrate includes an insulating substrate, a first pixel electrode, a second pixel electrode, a third pixel electrode, a first color filter disposed between the first pixel electrode and the insulating substrate, a second color filter disposed between the second pixel electrode and the insulating substrate, and a third color filter disposed between the third pixel electrode and the insulating substrate, wherein the first pixel electrode, the second pixel electrode, and the third pixel electrode are adjacent to each other, the first color filter has a first end, the second color filter has a second end, and the third color filter has a third end, and two of the first end, the second end, and the third end overlap in the first overlap area.Type: ApplicationFiled: December 10, 2015Publication date: June 23, 2016Applicant: Japan Display Inc.Inventors: Osamu ITOU, Kenji NAKAO, Toshimasa ISHIGAKI, Daisuke SONODA
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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