Patents by Inventor Toshimasa Ishigaki
Toshimasa Ishigaki 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: 20190171074Abstract: A liquid crystal display device comprising a TFT substrate having pixels each including a common electrode formed on an organic passivation film, an interlayer insulating film formed so as to cover the common electrode, a pixel electrode having a slit and formed on the interlayer insulating film, a through-hole formed in the organic passivation film and the interlayer insulating film, and a source electrode electrically conducted to the pixel electrode via the through-hole. A taper angle at a depth of D/2 of the through-hole is equal to or more than 50 degrees. The pixel electrode covers part of a side wall of the through-hole but does not cover the remaining part of the side wall of the through-hole. This configuration facilitates the alignment film material to flow into the through-hole, thereby solving a thickness unevenness of the alignment film in vicinity of the through-hole.Type: ApplicationFiled: February 11, 2019Publication date: June 6, 2019Inventors: Yasushi TOMIOKA, Toshimasa ISHIGAKI, Hidehiro SONODA, Sumito UETA
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Patent number: 10310678Abstract: When a protective film is formed so as to cover an electrode, a position of an end portion of the protective film is highly accurately adjusted. An electrode substrate includes a second substrate, and a sensing electrode continuously formed on the second substrate from a first region on an upper surface of the second substrate via a second region on the upper surface of the second substrate over a third region on the upper surface of the second substrate. Also, the electrode substrate includes a concave/convex pattern formed on the sensing electrode or the second substrate in the second region, and a protective film formed in the first region and the second region so as to cover the sensing electrode. An end portion of the protective film on the third region side is positioned on the concave/convex pattern.Type: GrantFiled: April 14, 2015Date of Patent: June 4, 2019Assignee: Japan Display Inc.Inventors: Koji Ishizaki, Daisuke Sonoda, Toshimasa Ishigaki
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Patent number: 10310339Abstract: In a wall electrode liquid crystal display device, planar distribution of the wall structure and the electrode is optimized to improve a yield. A liquid crystal display device includes a plurality of pixels arranged in a matrix, each of the pixels having an insulator wall structure formed at a border of pixels, a wall electrode formed at a side surface of the wall structure of the border of the pixels, a source electrode which is continuous with the wall electrode and formed of a planar electrode extending in a planar direction, a first common electrode provided between source electrodes at both sides of the pixel to form a retentive capacitance, and a second common electrode provided between wall electrodes on both sides of the pixel. A slit which becomes a border of the wall electrodes of two adjacent pixels is disposed only on a top of the wall structure.Type: GrantFiled: May 18, 2016Date of Patent: June 4, 2019Assignee: Japan Display Inc.Inventors: Osamu Itou, Takato Hiratsuka, Masanao Yamamoto, Toshimasa Ishigaki, Daisuke Sonoda
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Publication number: 20190138134Abstract: To reduce disturbances in display of images due to static electricity without deteriorating optical properties in a display. The display includes a conductive pattern provided on the upper surface of the substrate, a protection layer provided on the upper surface of the substrate to cover the conductive pattern, and a conductive layer provided on the protection layer. The sheet resistance of the conductive pattern is not more than 8 ?/square. A ratio of the total sum of areas of portions of the plurality of sub-pixels that overlap the conductive pattern in a plan view to the total sum of the areas of the plurality of sub-pixels is 1 to 22%. A sheet resistance of the conductive layer is higher than the sheet resistance of the conductive pattern.Type: ApplicationFiled: January 4, 2019Publication date: May 9, 2019Inventors: Masanobu Ikeda, Koji Ishizaki, Hayato Kurasawa, Yoshihiro Watanabe, Toshimasa Ishigaki, Daisuke Sonoda, Tatsuya Ide
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Patent number: 10241372Abstract: A liquid crystal display device comprising a TFT substrate having pixels each including a common electrode formed on an organic passivation film, an interlayer insulating film formed so as to cover the common electrode, a pixel electrode having a slit and formed on the interlayer insulating film, a through-hole formed in the organic passivation film and the interlayer insulating film, and a source electrode electrically conducted to the pixel electrode via the through-hole. A taper angle at a depth of D/2 of the through-hole is equal to or more than 50 degrees. The pixel electrode covers part of a side wall of the through-hole but does not cover the remaining part of the side wall of the through-hole. This configuration facilitates the alignment film material to flow into the through-hole, thereby solving a thickness unevenness of the alignment film in vicinity of the through-hole.Type: GrantFiled: October 30, 2018Date of Patent: March 26, 2019Assignee: Japan Display Inc.Inventors: Yasushi Tomioka, Toshimasa Ishigaki, Hidehiro Sonoda, Sumito Ueta
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Publication number: 20190064619Abstract: A liquid crystal display device comprising a TFT substrate having pixels each including a common electrode formed on an organic passivation film, an interlayer insulating film formed so as to cover the common electrode, a pixel electrode having a slit and formed on the interlayer insulating film, a through-hole formed in the organic passivation film and the interlayer insulating film, and a source electrode electrically conducted to the pixel electrode via the through-hole. A taper angle at a depth of D/2 of the through-hole is equal to or more than 50 degrees. The pixel electrode covers part of a side wall of the through-hole but does not cover the remaining part of the side wall of the through-hole. This configuration facilitates the alignment film material to flow into the through-hole, thereby solving a thickness unevenness of the alignment film in vicinity of the through-hole.Type: ApplicationFiled: October 30, 2018Publication date: February 28, 2019Inventors: Yasushi TOMIOKA, Toshimasa ISHIGAKI, Hidehiro SONODA, Sumito UETA
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Patent number: 10216345Abstract: To reduce disturbances in display of images due to static electricity without deteriorating optical properties in a display. The display includes a conductive pattern provided on the upper surface of the substrate, a protection layer provided on the upper surface of the substrate to cover the conductive pattern, and a conductive layer provided on the protection layer. The sheet resistance of the conductive pattern is not more than 8 ?/square. A ratio of the total sum of areas of portions of the plurality of sub-pixels that overlap the conductive pattern in a plan view to the total sum of the areas of the plurality of sub-pixels is 1 to 22%. A sheet resistance of the conductive layer is higher than the sheet resistance of the conductive pattern.Type: GrantFiled: July 26, 2017Date of Patent: February 26, 2019Assignee: Japan Display Inc.Inventors: Masanobu Ikeda, Koji Ishizaki, Hayato Kurasawa, Yoshihiro Watanabe, Toshimasa Ishigaki, Daisuke Sonoda, Tatsuya Ide
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Patent number: 10146096Abstract: A liquid crystal display device comprising a TFT substrate having pixels each including a common electrode formed on an organic passivation film, an interlayer insulating film formed so as to cover the common electrode, a pixel electrode having a slit and formed on the interlayer insulating film, a through-hole formed in the organic passivation film and the interlayer insulating film, and a source electrode electrically conducted to the pixel electrode via the through-hole. A taper angle at a depth of D/2 of the through-hole is equal to or more than 50 degrees. The pixel electrode covers part of a side wall of the through-hole but does not cover the remaining part of the side wall of the through-hole. This configuration facilitates the alignment film material to flow into the through-hole, thereby solving a thickness unevenness of the alignment film in vicinity of the through-hole.Type: GrantFiled: June 12, 2018Date of Patent: December 4, 2018Assignee: Japan Display Inc.Inventors: Yasushi Tomioka, Toshimasa Ishigaki, Hidehiro Sonoda, Sumito Ueta
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Patent number: 10133132Abstract: In an IPS mode liquid crystal display device, an interlayer insulating film is formed on a common electrode formed in a planar shape, and a pixel electrode is formed on the interlayer insulating film. The distance between the TFT substrate and the counter substrate is determined by a columnar spaces. The pixel electrode includes one comb-shaped electrode and a contact part. The tip of the comb-shaped, electrode overlaps the columnar spacer as seen in a plan view. The columnar spacer is present in, the area in which an electric field that allows the liquid crystal molecules to rotate backward occurs when a voltage is applied to the pixel electrode, so that the reverse rotation of the liquid crystal molecules does not occur, and it is possible to prevent the domain from occurring.Type: GrantFiled: September 28, 2017Date of Patent: November 20, 2018Assignee: Japan Display Inc.Inventors: Takeshi Sakai, Toshimasa Ishigaki, Satoru Kawasaki
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Method of manufacturing electrode substrate, electrode substrate, display apparatus and input device
Patent number: 10126888Abstract: A manufacturing process of an electrode substrate includes a step of forming a protective layer so as to cover a conductor pattern by applying raw material liquid discharged as droplets to an upper surface of a substrate in a first region and a second region of the upper surface of the substrate. At this time, an application amount of the raw material liquid per unit area in the second region is made smaller than an application amount of the raw material liquid per unit area in the first region, so that an average film thickness of the protective layer of a portion formed in the second region is made smaller than an average film thickness of the protective layer of a portion formed in the first region.Type: GrantFiled: August 20, 2015Date of Patent: November 13, 2018Assignee: JAPAN DISPLAY INC.Inventors: Koji Ishizaki, Hayato Kurasawa, Masanobu Ikeda, Yoshihiro Watanabe, Toshimasa Ishigaki, Daisuke Sonoda, Tatsuya Ide -
Publication number: 20180314118Abstract: The purpose of the invention is to avoid the domain in high definition liquid crystal display devices. The representative structure is as follows. Scan lines extending in a first direction, video signal lines extending in a second direction, a pixel is formed in an area surrounded by the video signal lines and the scan lines, the pixel includes: a thin film transistor, a flattening film that covers the thin film transistor, a first electrode formed on the flattening film, a second electrode formed over the first electrode via an insulating film, and a contact hole that is formed in the flattening film to connect the first electrode and the thin film transistor; the second electrode is formed in common in plural pixels, and has a slit between the video signal lines; wherein the slit is formed continuously in a plurality of pixels arranged in the second direction.Type: ApplicationFiled: March 22, 2018Publication date: November 1, 2018Applicant: Japan Display Inc.Inventors: Osamu Itou, Toshimasa Ishigaki
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Publication number: 20180292722Abstract: A liquid crystal display device comprising a TFT substrate having pixels each including a common electrode formed on an organic passivation film, an interlayer insulating film formed so as to cover the common electrode, a pixel electrode having a slit and formed on the interlayer insulating film, a through-hole formed in the organic passivation film and the interlayer insulating film, and a source electrode electrically conducted to the pixel electrode via the through-hole. A taper angle at a depth of D/2 of the through-hole is equal to or more than 50 degrees. The pixel electrode covers part of a side wall of the through-hole but does not cover the remaining part of the side wall of the through-hole. This configuration facilitates the alignment film material to flow into the through-hole, thereby solving a thickness unevenness of the alignment film in vicinity of the through-hole.Type: ApplicationFiled: June 12, 2018Publication date: October 11, 2018Inventors: Yasushi TOMIOKA, Toshimasa Ishigaki, Hidehiro Sonoda, Sumito Ueta
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Patent number: 10073313Abstract: 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: GrantFiled: January 31, 2017Date of Patent: September 11, 2018Assignee: Japan Display Inc.Inventors: Kenji Nakao, Osamu Itou, Toshimasa Ishigaki, Daisuke Sonoda, Takato Hiratsuka
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Patent number: 10074670Abstract: 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: GrantFiled: November 30, 2015Date of Patent: September 11, 2018Assignee: Japan Display Inc.Inventors: Osamu Itou, Kenji Nakao, Toshimasa Ishigaki, Daisuke Sonoda
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Patent number: 10054832Abstract: 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: GrantFiled: October 27, 2015Date of Patent: August 21, 2018Assignee: Japan Display Inc.Inventors: Osamu Itou, Kenji Nakao, Toshimasa Ishigaki, Masahiro Kosuge
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Patent number: 10018885Abstract: A liquid crystal display device comprising a TFT substrate having pixels each including a common electrode formed on an organic passivation film, an interlayer insulating film formed so as to cover the common electrode, a pixel electrode having a slit and formed on the interlayer insulating film, a through-hole formed in the organic passivation film and the interlayer insulating film, and a source electrode electrically conducted to the pixel electrode via the through-hole. A taper angle at a depth of D/2 of the through-hole is equal to or more than 50 degrees. The pixel electrode covers part of a side wall of the through-hole but does not cover the remaining part of the side wall of the through-hole. This configuration facilitates the alignment film material to flow into the through-hole, thereby solving a thickness unevenness of the alignment film in vicinity of the through-hole.Type: GrantFiled: February 22, 2018Date of Patent: July 10, 2018Assignee: Japan Display Inc.Inventors: Yasushi Tomioka, Toshimasa Ishigaki, Hidehiro Sonoda, Sumito Ueta
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Publication number: 20180180957Abstract: A liquid crystal display device comprising a TFT substrate having pixels each including a common electrode formed on an organic passivation film, an interlayer insulating film formed so as to cover the common electrode, a pixel electrode having a slit and formed on the interlayer insulating film, a through-hole formed in the organic passivation film and the interlayer insulating film, and a source electrode electrically conducted to the pixel electrode via the through-hole. A taper angle at a depth of D/2 of the through-hole is equal to or more than 50 degrees. The pixel electrode covers part of a side wall of the through-hole but does not cover the remaining part of the side wall of the through-hole. This configuration facilitates the alignment film material to flow into the through-hole, thereby solving a thickness unevenness of the alignment film in vicinity of the through-hole.Type: ApplicationFiled: February 22, 2018Publication date: June 28, 2018Inventors: Yasushi TOMIOKA, Toshimasa ISHIGAKI, Hidehiro SONODA, Sumito UETA
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Patent number: 10001680Abstract: In an LCD device having wall electrodes, four kinds of pixels are used that impart different alignment properties to the liquid crystal molecules. Specifically, the LC molecules are aligned such that: the LC molecules in first pixels twist clockwise and rise in a plus direction; the LC molecules in second pixels twist clockwise and rise in a minus direction; the LC molecules in third pixels twist counterclockwise and rise in the plus direction; and the LC molecules in fourth pixels twist counterclockwise and rise in the minus direction. The pixels of the same type are arranged in rows such that their long sides are adjacent to one another.Type: GrantFiled: November 4, 2014Date of Patent: June 19, 2018Assignee: Japan Display Inc.Inventors: Osamu Itou, Takato Hiratsuka, Toshimasa Ishigaki, Daisuke Sonoda
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Publication number: 20180107078Abstract: According to one embodiment, a display device includes an insulating substrate, a light-shielding member disposed above the insulating substrate, a first color filter disposed above the insulating substrate, a second color filter disposed alongside the first color filter, a partition disposed on the light-shielding member and between the first color filter and the second color filter and an insulating film disposed on the first color filter and the second color filter, and an upper surface of the partition and an upper surface of the insulating film are located on a same plane.Type: ApplicationFiled: October 16, 2017Publication date: April 19, 2018Applicant: Japan Display Inc.Inventors: Toshimasa ISHIGAKI, Osamu Itou
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Patent number: 9939698Abstract: A liquid crystal display device comprising a TFT substrate having pixels each including a common electrode formed on an organic passivation film, an interlayer insulating film formed so as to cover the common electrode, a pixel electrode having a slit and formed on the interlayer insulating film, a through-hole formed in the organic passivation film and the interlayer insulating film, and a source electrode electrically conducted to the pixel electrode via the through-hole. A taper angle at a depth of D/2 of the through-hole is equal to or more than 50 degrees. The pixel electrode covers part of a side wall of the through-hole but does not cover the remaining part of the side wall of the through-hole. This configuration facilitates the alignment film material to flow into the through-hole, thereby solving a thickness unevenness of the alignment film in vicinity of the through-hole.Type: GrantFiled: October 16, 2017Date of Patent: April 10, 2018Assignee: Japan Display Inc.Inventors: Yasushi Tomioka, Toshimasa Ishigaki, Hidehiro Sonoda, Sumito Ueta