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).
-
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
-
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
-
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
-
Patent number: 9933646Abstract: Detection electrode wirings formed by an ITO film have a high resistance and the detection capability thereof is degraded with the increase of the size and/or resolution. A manufacturing method of a display device includes: (a) arranging liquid crystal between an array substrate and a counter substrate; (b) forming a metal layer and a low-reflection layer on the counter substrate after the step (a); (c) applying an overcoat film onto the metal layer and the low-reflection layer; and (d) curing the overcoat film to form a protection layer. The step (d) cures the overcoat film with light and heat.Type: GrantFiled: June 5, 2017Date of Patent: April 3, 2018Assignee: Japan Display Inc.Inventors: Toshimasa Ishigaki, Daisuke Sonoda, Tatsuya Ide, Koji Ishizaki, Yoshihiro Watanabe, Hayato Kurasawa, Masanobu Ikeda
-
Patent number: 9898118Abstract: According to one embodiment, a position detecting substrate includes a first base material, a sensing electrode formed of metal on the first base material and configured to detect a position, an adhesive layer facing the first base material and the sensing electrode and including a resin, and a second base material adhered to the sensing electrode by the adhesive layer, wherein assuming the force required to peel the sensing electrode from the first base material to be A, the force required to peel the adhesive layer from the first base material to be B and the force required to peel the second base material from the adhesive layer to be C, then A>B, or A>C.Type: GrantFiled: November 19, 2015Date of Patent: February 20, 2018Assignee: Japan Display Inc.Inventors: Tatsuya Ide, Toshimasa Ishigaki, Daisuke Sonoda
-
Publication number: 20180046047Abstract: 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 16, 2017Publication date: February 15, 2018Inventors: Yasushi TOMIOKA, Toshimasa ISHIGAKI, Hidehiro Sonoda, Sumito UETA
-
Publication number: 20180017832Abstract: 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: ApplicationFiled: September 28, 2017Publication date: January 18, 2018Inventors: Takeshi SAKAI, Toshimasa ISHIGAKI, Satoru KAWASAKI
-
Patent number: 9857617Abstract: A first electrode 30 for the touch panel is formed on an outer side of a counter substrate 200, and the protection film 210 is formed over the first electrode 30 to cover it. A defect 211 in the protection film 210 is filled in with another protection film 210 by inkjet coating. The surface of the protection film 210 is rubbed to a rough surface finish. The polarization plate 220 is attached to the rough surface of the protection film 210 via an adhesive material 221. Since the defective region is repaired by the formation of the protection film 210, corrosion of the first electrode (wiring) 30 due to the presence of the adhesive material 221 can be prevented, and since the surface of the second protection film 210 is made rough, a resulting increase in adhering surface area enhances the adhesion for attaching the polarization plate 220.Type: GrantFiled: August 24, 2015Date of Patent: January 2, 2018Assignee: Japan Display Inc.Inventors: Daisuke Sonoda, Tatsuya Ide, Toshimasa Ishigaki, Masanobu Ikeda, Koji Ishizaki, Hayato Kurasawa, Yoshihiro Watanabe
-
Patent number: 9841636Abstract: A high-definition and high-contrast liquid crystal display device having a high aperture ratio without light leakage around a columnar spacer is provided. The liquid crystal display device of a horizontal electric field type includes a TFT substrate with a pixel electrode and a common electrode, a color filter substrate with a color filter, a columnar spacer interposed between the substrates, and a liquid crystal layer arranged between the substrates. A liquid crystal alignment film formed between the substrates is a photo-alignment film. The columnar spacer, formed on the color filter substrate or the TFT substrate, has a wall-like shape and an inclined surface extending in a direction parallel to or perpendicular to a direction in which the liquid crystal is initially aligned.Type: GrantFiled: April 10, 2014Date of Patent: December 12, 2017Assignee: Japan Display Inc.Inventors: Yasushi Tomioka, Osamu Itou, Toshimasa Ishigaki, Hidehiro Sonoda, Yosuke Hyodo
-
Patent number: 9817288Abstract: 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: November 4, 2016Date of Patent: November 14, 2017Assignee: Japan Display Inc.Inventors: Yasushi Tomioka, Toshimasa Ishigaki, Hidehiro Sonoda, Sumito Ueta
-
Publication number: 20170322652Abstract: 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 8Q/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: July 26, 2017Publication date: November 9, 2017Inventors: Masanobu Ikeda, Koji Ishizaki, Hayato Kurasawa, Yoshihiro Watanabe, Toshimasa Ishigaki, Daisuke Sonoda, Tatsuya Ide
-
Patent number: 9804454Abstract: 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 spacer. 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: July 31, 2015Date of Patent: October 31, 2017Assignee: Japan Display Inc.Inventors: Takeshi Sakai, Toshimasa Ishigaki, Satoru Kawasaki
-
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
-
Publication number: 20170269417Abstract: Detection electrode wirings formed by an ITO film have a high resistance and the detection capability thereof is degraded with the increase of the size and/or resolution. A manufacturing method of a display device includes: (a) arranging liquid crystal between an array substrate and a counter substrate; (b) forming a metal layer and a low-reflection layer on the counter substrate after the step (a); (c) applying an overcoat film onto the metal layer and the low-reflection layer; and (d) curing the overcoat film to form a protection layer. The step (d) cures the overcoat film with light and heat.Type: ApplicationFiled: June 5, 2017Publication date: September 21, 2017Inventors: Toshimasa ISHIGAKI, Daisuke SONODA, Tatsuya IDE, Koji ISHIZAKI, Yoshihiro WATANABE, Hayato KURASAWA, Masanobu IKEDA
-
Patent number: 9746977Abstract: 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: June 17, 2015Date of Patent: August 29, 2017Assignee: Japan Display Inc.Inventors: Masanobu Ikeda, Koji Ishizaki, Hayato Kurasawa, Yoshihiro Watanabe, Toshimasa Ishigaki, Daisuke Sonoda, Tatsuya Ide
-
Patent number: 9703152Abstract: In an IPS mode liquid crystal display device, a counter electrode is formed flat on a first insulating film. A second insulating film is formed in the peripheral portion of the counter electrode. A third insulating film is formed so as to cover the counter electrode and the second insulating film. A pixel electrode is formed on the third insulating film. The second and third insulating films are present between the pixel electrode and the counter electrode in the periphery of the pixel. The third insulating film is present between the pixel electrode and the counter electrode in the portion other than the peripheral portion of the pixel. An electric field between the pixel electrode and the counter electrode is smaller in the periphery of the pixel than in the vicinity of the center of the pixel, to prevent the occurrence of a domain in the periphery of the pixel.Type: GrantFiled: August 13, 2014Date of Patent: July 11, 2017Assignee: Japan Display Inc.Inventors: Takeshi Sakai, Toshimasa Ishigaki, Yasushi Tomioka
-
Patent number: 9696575Abstract: Detection electrode wirings formed by an ITO film have a high resistance and the detection capability thereof is degraded with the increase of the size and/or resolution. A manufacturing method of a display device includes: (a) arranging liquid crystal between an array substrate and a counter substrate; (b) forming a metal layer and a low-reflection layer on the counter substrate after the step (a); (c) applying an overcoat film onto the metal layer and the low-reflection layer; and (d) curing the overcoat film to form a protection layer. The step (d) cures the overcoat film with light and heat.Type: GrantFiled: June 1, 2015Date of Patent: July 4, 2017Assignee: Japan Display Inc.Inventors: Toshimasa Ishigaki, Daisuke Sonoda, Tatsuya Ide, Koji Ishizaki, Yoshihiro Watanabe, Hayato Kurasawa, Masanobu Ikeda
-
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
-
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
-
Patent number: 9625772Abstract: In an LCD device, the slope angle of a wall surface of a wall structure (wall-surface slope angle) is varied in accordance with the angle formed between the wall structure and an alignment treatment direction (alignment treatment angle). At places where the alignment treatment angle is small, the wall-surface slope angle is made larger; conversely, at places where the alignment treatment angle is large, the wall-surface slope angle is made smaller.Type: GrantFiled: November 4, 2014Date of Patent: April 18, 2017Assignee: Japan Display Inc.Inventors: Osamu Itou, Takato Hiratsuka, Toshimasa Ishigaki, Daisuke Sonoda