Patents by Inventor Yasushi Tomioka
Yasushi Tomioka 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: 10418436Abstract: According to one embodiment, a display device includes an insulating substrate having a display area, a pad area and a bend area, wiring lines, a first protective film and a second protective film. The wiring lines are elongated from the display area to the pad area. The first protective film is located on the insulating substrate and the wiring lines. The second protective film is located on the first protective film and is formed of an organic insulating material different from that of the first protective film.Type: GrantFiled: May 11, 2018Date of Patent: September 17, 2019Assignee: Japan Display Inc.Inventors: Yasushi Tomioka, Hajime Yamaguchi
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Publication number: 20190227367Abstract: According to one embodiment, a display device includes a first substrate and an external circuit, the first substrate including a first area, a second area, and wirings, the first area including a display area in which pixels are arranged the external circuit being mounted on the second area. The wirings are electrically connected to the external circuit, provided in the first area and the second area, and arranged in the first direction. At least one of the wirings is inclined with respect to a second direction orthogonal to the first direction in a first portion of the second area. The first substrate is bent in the first portion.Type: ApplicationFiled: April 4, 2019Publication date: July 25, 2019Applicant: Japan Display IncInventors: Yasushi TOMIOKA, Hajime YAMAGUCHI
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Publication number: 20190179201Abstract: The present invention prevents the shaving of an alignment film caused by a columnar spacer in a liquid crystal display device of an IPS method using photo-alignment. A plinth higher than a pixel electrode is formed at a part where a columnar spacer formed over a counter substrate touches a TFT substrate. When an alignment film of a double-layered structure is applied over the pixel electrode and the plinth, the thickness of the alignment film over the plinth reduces by a leveling effect. When photo-alignment is applied in the state, a photodegraded upper alignment film over the plinth disappears and a lower alignment film having a high mechanical strength remains. As a result, it is possible to prevent the shaving of the alignment film.Type: ApplicationFiled: January 4, 2019Publication date: June 13, 2019Inventors: Noboru KUNIMATSU, Masaki MATSUMORI, Hidehiro SONODA, Yasushi TOMIOKA, Toshiki KANEKO
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Publication number: 20190179186Abstract: According to one embodiment, a display device includes an insulating substrate including a first surface, and a second surface opposite to the first surface, a circuit board mounted on the first surface, a supporting member adhered to the insulating substrate on the second surface, and an antistatic layer located between the insulating substrate and the supporting member.Type: ApplicationFiled: February 14, 2019Publication date: June 13, 2019Applicant: Japan Display Inc.Inventors: Tatsuya IDE, Daisuke SONODA, Yasushi TOMIOKA
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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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Publication number: 20190171073Abstract: In a liquid crystal display device, a common electrode is formed on an organic passivation film, an interlayer insulating film is formed on the common electrode, a pixel electrode with a slit is formed on the interlayer insulating film, and a through hole is formed in the organic passivation film and the interlayer insulating film, so that the pixel electrode is connected to a source electrode of a TFT through the through hole. Further, the taper angle around the upper base of the through hole is smaller than the taper angle around the lower base. Thus, the alignment film material can easily flow into the through hole when the diameter of the through hole is reduced to connect the pixel and source electrodes, preventing display defects such as uneven brightness due to the absence of the alignment film or due to the alignment film irregularity around the through hole.Type: ApplicationFiled: February 12, 2019Publication date: June 6, 2019Inventors: Yasushi TOMIOKA, Yosuke HYODO, Hidehiro SONODA, Noboru KUNIMATSU
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Patent number: 10302980Abstract: According to one embodiment, a display device includes a first substrate and an external circuit, the first substrate including a first area, a second area, and wirings, the first area including a display area in which pixels are arranged the external circuit being mounted on the second area. The wirings are electrically connected to the external circuit, provided in the first area and the second area, and arranged in the first direction. At least one of the wirings is inclined with respect to a second direction orthogonal to the first direction in a first portion of the second area. The first substrate is bent in the first portion.Type: GrantFiled: June 23, 2017Date of Patent: May 28, 2019Assignee: Japan Display Inc.Inventors: Yasushi Tomioka, Hajime Yamaguchi
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Patent number: 10281771Abstract: In a liquid crystal display device having an alignment film subjected to an optical alignment process, the frame area can be reduced while maintaining the reliability of the sealing portion. To achieve this, in the display area, the alignment process is performed with UV light on the alignment film, to form an area in which the alignment film is not formed in the opposing first and second sides, and to form an area in which the amount of UV light irradiation on the alignment film is one fourth or less of the display area in the opposing third and fourth sides. In the first and second sides, the sealing material overlaps the area in which the alignment film is not formed. In the third and fourth sides, the sealing material overlaps the area in which the amount of UV light irradiation is one fourth or less of the display area.Type: GrantFiled: May 3, 2016Date of Patent: May 7, 2019Assignee: Japan Display Inc.Inventors: Hidehiro Sonoda, Noboru Kunimatsu, Takenori Hirota, Yosuke Hyodo, Yasuo Imanishi, Yasushi Tomioka
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Publication number: 20190107746Abstract: A liquid crystal display device includes: a TFT substrate having gate lines and data lines arranged thereon, the gate lines extending in a first direction and arranged in a second direction, the data lines extending in the second direction and arranged in the first direction; a counter substrate having a black matrix and a color filter; and liquid crystals put between the TFT substrate and the counter substrate. Columnar spacers are formed on the counter substrate. Pedestals are formed on portions of the TFT substrate, the portions corresponding to the columnar spacers. A convex portion and a concave portion are present at the top end of the columnar spacer. The pedestal is formed corresponding to the concave portion. The concave portion is opened at the ends thereof and connected to the lateral side of the columnar spacer.Type: ApplicationFiled: December 7, 2018Publication date: April 11, 2019Inventors: Yasushi TOMIOKA, Noboru KUNIMATSU, Yosuke HYODO, Toshiki KANEKO, Yuko MATSUMOTO
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Patent number: 10247990Abstract: In a liquid crystal display device, a common electrode is formed on an organic passivation film, an interlayer insulating film is formed on the common electrode, a pixel electrode with a slit is formed on the interlayer insulating film, and a through hole is formed in the organic passivation film and the interlayer insulating film, so that the pixel electrode is connected to a source electrode of a TFT through the through hole. Further, the taper angle around the upper base of the through hole is smaller than the taper angle around the lower base. Thus, the alignment film material can easily flow into the through hole when the diameter of the through hole is reduced to connect the pixel and source electrodes, preventing display defects such as uneven brightness due to the absence of the alignment film or due to the alignment film irregularity around the through hole.Type: GrantFiled: October 12, 2018Date of Patent: April 2, 2019Assignee: Japan Display Inc.Inventors: Yasushi Tomioka, Yosuke Hyodo, Hidehiro Sonoda, Noboru Kunimatsu
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Patent number: 10247988Abstract: According to one embodiment, a display device includes an insulating substrate including a first surface, and a second surface opposite to the first surface, a circuit board mounted on the first surface, a supporting member adhered to the insulating substrate on the second surface, and an antistatic layer located between the insulating substrate and the supporting member.Type: GrantFiled: June 29, 2017Date of Patent: April 2, 2019Assignee: Japan Display inc.Inventors: Tatsuya Ide, Daisuke Sonoda, Yasushi Tomioka
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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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Publication number: 20190051858Abstract: According to one embodiment, a display device includes a display panel including a first area including a display area, a second area including a terminal portion and a third area located between the first area and the second area and a cover member adhered to the first area via an adhesive layer, and the display panel is bent in the third area so that the first area and the second area oppose each other on a side opposite to the cover member, and the third area is adhered to the cover member by a first resin.Type: ApplicationFiled: August 10, 2018Publication date: February 14, 2019Applicant: Japan Display Inc.Inventors: Yasushi TOMIOKA, Hajime YAMAGUCHI, Akio MURAYAMA
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Publication number: 20190041707Abstract: In a liquid crystal display device, a common electrode is formed on an organic passivation film, an interlayer insulating film is formed on the common electrode, a pixel electrode with a slit is formed on the interlayer insulating film, and a through hole is formed in the organic passivation film and the interlayer insulating film, so that the pixel electrode is connected to a source electrode of a TFT through the through hole. Further, the taper angle around the upper base of the through hole is smaller than the taper angle around the lower base. Thus, the alignment film material can easily flow into the through hole when the diameter of the through hole is reduced to connect the pixel and source electrodes, preventing display defects such as uneven brightness due to the absence of the alignment film or due to the alignment film irregularity around the through hole.Type: ApplicationFiled: October 12, 2018Publication date: February 7, 2019Inventors: Yasushi TOMIOKA, Yosuke HYODO, Hidehiro SONODA, Noboru KUNIMATSU
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Patent number: 10197857Abstract: The present invention prevents the shaving of an alignment film caused by a columnar spacer in a liquid crystal display device of an IPS method using photo-alignment. A plinth higher than a pixel electrode is formed at a part where a columnar spacer formed over a counter substrate touches a TFT substrate. When an alignment film of a double-layered structure is applied over the pixel electrode and the plinth, the thickness of the alignment film over the plinth reduces by a leveling effect. When photo-alignment is applied in the state, a photodegraded upper alignment film over the plinth disappears and a lower alignment film having a high mechanical strength remains. As a result, it is possible to prevent the shaving of the alignment film.Type: GrantFiled: November 29, 2017Date of Patent: February 5, 2019Assignee: Japan Display Inc.Inventors: Noboru Kunimatsu, Masaki Matsumori, Hidehiro Sonoda, Yasushi Tomioka, Toshiki Kaneko
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Patent number: 10185184Abstract: A liquid crystal display device includes: a TFT substrate having gate lines and data lines arranged thereon, the gate lines extending in a first direction and arranged in a second direction, the data lines extending in the second direction and arranged in the first direction; a counter substrate having a black matrix and a color filter; and liquid crystals put between the TFT substrate and the counter substrate. Columnar spacers are fainted on the counter substrate. Pedestals are formed on portions of the TFT substrate, the portions corresponding to the columnar spacers. A convex portion and a concave portion are present at the top end of the columnar spacer. The pedestal is formed corresponding to the concave portion. The concave portion is opened at the ends thereof and connected to the lateral side of the columnar spacer.Type: GrantFiled: July 26, 2017Date of Patent: January 22, 2019Assignee: Japan Display Inc.Inventors: Yasushi Tomioka, Noboru Kunimatsu, Yosuke Hyodo, Toshiki Kaneko, Yuko Matsumoto
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Publication number: 20180366534Abstract: According to one embodiment, there is provided a display device which includes an insulating substrate having a bend area, and a wiring line located in the bend area. The bend area is bent about a bend axis extending in a first direction. The wiring line in the bend area has a first portion which extends in the first direction and a second portion which extends in a direction intersecting the first portion and is connected to the first portion. A first angle formed by the first portion and the second portion is less than 90 degrees.Type: ApplicationFiled: June 14, 2018Publication date: December 20, 2018Applicant: Japan Display Inc.Inventors: Yasushi Tomioka, Hajime Yamaguchi
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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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Publication number: 20180337367Abstract: According to one embodiment, a display device includes an insulating substrate having a display area, a pad area and a bend area, wiring lines, a first protective film and a second protective film. The wiring lines are elongated from the display area to the pad area. The first protective film is located on the insulating substrate and the wiring lines. The second protective film is located on the first protective film and is formed of an organic insulating material different from that of the first protective film.Type: ApplicationFiled: May 11, 2018Publication date: November 22, 2018Applicant: Japan Display Inc.Inventors: Yasushi TOMIOKA, Hajime YAMAGUCHI