Patents by Inventor Takeo Koito
Takeo Koito 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: 20240004243Abstract: A liquid crystal light control device in an embodiment according to the present invention includes a first liquid crystal cell, and a second liquid crystal cell overlapping the first liquid crystal cell. Each of the first liquid crystal cell and the second liquid crystal cell includes a first substrate arranged with a first electrode having a strip pattern, a second substrate arranged with a second electrode having a strip pattern, and a liquid crystal layer between the first substrate and the second substrate. A longitudinal direction of the strip pattern of the first electrode and a longitudinal direction of the strip pattern of the second electrode are arranged to intersect at an angle in the range of 45 degreesĀ±10 degrees.Type: ApplicationFiled: September 19, 2023Publication date: January 4, 2024Inventors: Takeo KOITO, Tae KUROKAWA, Kojiro IKEDA
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Publication number: 20230418119Abstract: According to one embodiment, each of a first liquid crystal to a fourth liquid crystal cell includes a first strip electrode, a second strip electrode, a third strip electrode, and a fourth strip electrode, the first strip electrode to the fourth strip electrode of the first liquid crystal cell and the first strip electrode to the fourth strip electrode of the third liquid crystal cell have a first shape, and the first strip electrode to the fourth strip electrode of the second liquid crystal cell and the first strip electrode to the fourth strip electrode of the fourth liquid crystal cell have a second shape that is different from the first shape.Type: ApplicationFiled: September 6, 2023Publication date: December 28, 2023Inventors: Kojiro IKEDA, Takeo KOITO
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Publication number: 20230418108Abstract: According to one embodiment, a liquid crystal device includes a first liquid crystal cell and a second liquid crystal cell. The first liquid crystal cell and the second liquid crystal cell each include a first strip electrode, a second strip electrode, a third strip electrode and a fourth strip electrode. The extension direction of each of the first strip electrode and the second strip electrode in the first liquid crystal cell is different from the extension direction of each of the first strip electrode and the second strip electrode in the second liquid crystal cell. The extension direction of each of the first strip electrode and the second strip electrode is orthogonal to the extension direction of each of the third strip electrode and the fourth strip electrode.Type: ApplicationFiled: September 12, 2023Publication date: December 28, 2023Inventors: Kojiro IKEDA, Takeo KOITO, Koichi NAGAO, Shinichiro TANAKA
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Patent number: 11852303Abstract: The purpose of the present invention is to realize a lighting device of small light distribution angle and less leakage light and further to realize a lighting device in which the light beam is easy to control. The following is an example of the structure to meet the above purpose. A lighting device including: a light guide; LEDs set at a side surface of the light guide; a prism sheet set on a major surface of the light guide, in which a first louver which extends in a first direction and, a second louver which extends in an orthogonal direction to the first direction are superposed on the prism sheet.Type: GrantFiled: April 20, 2023Date of Patent: December 26, 2023Assignee: JAPAN DISPLAY INC.Inventors: Makoto Hasegawa, Takeo Koito, Nobuyuki Suzuki, Masafumi Okada
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Publication number: 20230408877Abstract: The display device includes an image display panel emitting linearly polarized light from a display area, a retardation plate on the image display panel, a variable phase difference element located on the retardation plate and providing phase difference to an incoming light, and a liquid crystal diffraction element on the variable phase difference element. The variable phase difference element is switchable between an on state, an off state, and an intermediate state, and the phase change of the intermediate state is smaller than the phase change of the on state. A first emission direction of a first emitted light in the on state, a second emission direction of a second emitted light in the off state, and a third emission direction of a third emitted light in the intermediate state are different from each other.Type: ApplicationFiled: September 5, 2023Publication date: December 21, 2023Applicant: Japan Display Inc.Inventors: Takeo KOITO, Junji KOBASHI
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Publication number: 20230400722Abstract: According to an aspect, a display device includes: a display panel; and a parallax formation panel disposed between the display panel and a viewpoint. The parallax formation panel includes first electrodes and second electrodes, the first electrodes being provided to be able to form light transmitting regions in accordance with positions of a plurality of predetermined viewpoints, the second electrodes being provided to be able to form light shielding regions that shield regions other than the light transmitting regions from light. A width of each first electrode in a first direction in which the plurality of viewpoints are arranged is longer than a length of each first electrode in a second direction orthogonal to the first direction and extending along a display surface of the display panel.Type: ApplicationFiled: June 6, 2023Publication date: December 14, 2023Inventors: Takeo KOITO, Shuji HAYASHI
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Publication number: 20230400738Abstract: A light adjustment device includes a panel unit formed in a shape of a rectangular column by stacking a plurality of light adjustment panels in a first direction, each of the light adjustment panels having a polygonal shape and including a first substrate and a second substrate, the first substrate including a first terminal, the second substrate overlapping the first substrate and including a second terminal, and a conductive member provided at a corner of the rectangular column in a side part of the panel unit and continuously extending in the first direction.Type: ApplicationFiled: June 7, 2023Publication date: December 14, 2023Inventors: Yoshikatsu IMAZEKI, Yoshifumi KAMEI, Takeo KOITO
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Publication number: 20230393428Abstract: According to an aspect, a display device capable of outputting individual images to a plurality of viewpoints arranged in a predetermined direction, the display device includes: two light-transmitting substrates that face each other with a liquid crystal layer interposed therebetween; a resin layer that is a light-transmitting layer and stacked between the liquid crystal layer and one substrate positioned on a user side of the two light-transmitting substrates; and a light-shielding barrier provided between the one substrate and the resin layer and having a plurality of openings.Type: ApplicationFiled: June 1, 2023Publication date: December 7, 2023Inventors: Takeo KOITO, Shuji HAYASHI
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Publication number: 20230384640Abstract: A light adjustment device includes a plurality of liquid crystal cells each including a light adjustment region that polarizes light emitted from a light source, the liquid crystal cells being stacked in a direction in which the light is emitted. The liquid crystal cells each include a first substrate in which a plurality of first metal wires are provided, and a second substrate in which a plurality of second metal wires are provided and that sandwiches a liquid crystal layer with the first substrate.Type: ApplicationFiled: August 9, 2023Publication date: November 30, 2023Inventors: Takahiro OCHIAI, Shunpei TAKEUCHI, Osamu KOBAYASHI, Hiroya MORIMOTO, Takeo KOITO, Koichi NAGAO
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Patent number: 11829014Abstract: According to an aspect, a display device includes: a display panel; and a parallax formation panel disposed between the display panel and a viewpoint. The parallax formation panel includes first electrodes and second electrodes, the first electrodes being provided to be able to form light transmitting regions in accordance with positions of a plurality of predetermined viewpoints, the second electrodes being provided to be able to form light shielding regions that shield regions other than the light transmitting regions from light. A width of each first electrode in a first direction in which the plurality of viewpoints are arranged is longer than a length of each first electrode in a second direction orthogonal to the first direction and extending along a display surface of the display panel.Type: GrantFiled: June 6, 2023Date of Patent: November 28, 2023Assignee: Japan Display Inc.Inventors: Takeo Koito, Shuji Hayashi
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Publication number: 20230375159Abstract: An optical element includes a first liquid crystal cell and a second liquid crystal cell. The first liquid crystal cell and the second liquid crystal cell are stacked. Each of the first liquid crystal cell and the second liquid crystal cell includes a first substrate on which a first transparent electrode and a second transparent electrode are alternately and repeatedly arranged in a first direction, a second substrate on which a third transparent electrode and a fourth transparent electrode are alternately and repeatedly arranged in a second direction intersecting the first direction, and a liquid crystal layer between the first substrate and the second substrate. The second substrate of the first liquid crystal cell and the first substrate of the second liquid crystal cell are adjacent to each other.Type: ApplicationFiled: August 8, 2023Publication date: November 23, 2023Inventors: Tae KUROKAWA, Takeo KOITO, Kojiro IKEDA
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Publication number: 20230375887Abstract: A light adjustment device in which a plurality of liquid crystal cells each including a light adjustment region configured to polarize light emitted from a light source are stacked in a direction in which the light is emitted is disclosed. The liquid crystal cells each include a first substrate including a plurality of first drive electrodes extending in a first direction in the light adjustment region, and a second substrate sandwiching a liquid crystal layer between the first substrate and the second substrate and including a plurality of second drive electrodes extending in a second direction different from the first direction in the light adjustment region.Type: ApplicationFiled: August 4, 2023Publication date: November 23, 2023Inventors: Takahiro OCHIAI, Yukiya HIRABAYASHI, Shunpei TAKEUCHI, Osamu KOBAYASHI, Takeo KOITO, Koichi NAGAO
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Publication number: 20230375883Abstract: A liquid crystal light control device in an embodiment according to the present invention includes a first liquid crystal cell, a second liquid crystal cell overlapping the first liquid crystal cell, a third liquid crystal cell overlapping the second liquid crystal cell, and a fourth liquid crystal cell overlapping the third liquid crystal, each of the first liquid crystal cell, the second liquid crystal cell, the third liquid crystal cell, and the fourth liquid crystal cell includes a first substrate arranged with a first electrode having a strip pattern, a second substrate arranged with a second electrode having a strip pattern, and a liquid crystal layer between the first substrate and the second substrate. The first substrate and the second substrate are arranged with a longitudinal direction of the strip pattern of the first electrode and second electrode intersecting.Type: ApplicationFiled: August 8, 2023Publication date: November 23, 2023Inventors: Tae KUROKAWA, Takeo KOITO, Kojiro IKEDA
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Publication number: 20230359091Abstract: An optical element includes at least two liquid crystal cells. The at least two liquid crystal cells include a first substrate on which a first transparent electrode and a second transparent electrode are alternately and repeatedly arranged in a first direction, a second substrate on which a third transparent electrode and a fourth transparent electrode are alternately and repeatedly arranged in a second direction intersecting the first direction, and a liquid crystal layer between the first substrate and the second substrate. The second transparent electrode comprises a first bent portion bent in the first direction. The fourth transparent electrode comprises a second bent portion bent in the second direction.Type: ApplicationFiled: July 14, 2023Publication date: November 9, 2023Inventors: Tae KUROKAWA, Takeo KOITO, Kojiro IKEDA
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Publication number: 20230315230Abstract: According to an aspect, a display device with a touch detecting function includes: a display area in which pixels each composed of a plurality of color areas are arranged in a matrix; a touch detection electrode including a first conductive thin wire extending in a first direction; and a dummy electrode including a plurality of second conductive thin wires; a drive electrode having capacitance for the touch detection electrode. Each of the second conductive thin wires includes a plurality of thin wire pieces extending in a direction different from the first direction and is divided by a slit between the thin wire pieces. A color area in the display area with which the slit overlaps has a different color from a color area in the display area with which a slit closest to the slit in a second direction orthogonal to the first direction overlaps.Type: ApplicationFiled: June 8, 2023Publication date: October 5, 2023Inventors: Koji ISHIZAKI, Hayato KURASAWA, Takeo KOITO
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Patent number: 11774812Abstract: According to one embodiment, an optical control device includes a first liquid crystal cell and a second liquid crystal cell. The second liquid crystal cell is stacked on the first liquid crystal cell. The first liquid crystal cell has a function of modulating and converting a first polarization component of incident light into a second polarization component, and hardly modulating and converting a third polarization component of incident light into a fourth polarization component. The second liquid crystal cell has a function of hardly modulating the second polarization component transmitted through the first liquid crystal cell, and modulating the fourth polarization component transmitted through the first liquid crystal cell.Type: GrantFiled: March 18, 2022Date of Patent: October 3, 2023Assignee: Japan Display Inc.Inventors: Masashi Mitsui, Takeo Koito, Tae Kurokawa
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Patent number: 11774786Abstract: According to an aspect, a view-angle control device includes: a drive layer in which light-transmitting regions and switchable regions are alternately arranged in one direction, each light-transmitting region being configured to transmit light, each switchable region being switchable between a light-transmitting state and a light-blocking state through switching of liquid crystal orientation; and a plurality of optical member layers stacked together with the drive layer. Each optical member layer includes a base member that transmits light and a light-blocking part that is provided at a position overlapping with the switchable region and blocks light. The light-blocking part is disposed on a surface of the base member on a farther side from the drive layer.Type: GrantFiled: August 11, 2022Date of Patent: October 3, 2023Assignee: Japan Display Inc.Inventor: Takeo Koito
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Patent number: 11754904Abstract: According to one embodiment, a light control device comprises a first liquid crystal cell includes a first liquid crystal layer, a second liquid crystal cell includes a second liquid crystal layer, and a third liquid crystal cell includes a third liquid crystal layer. The first liquid crystal layer and the third liquid crystal layer each have a first region that scatters a first polarization component and that transmits a second polarization component. The second liquid crystal layer has a third region that overlaps the first region and converts the second polarization component into the first polarization component.Type: GrantFiled: July 29, 2022Date of Patent: September 12, 2023Assignee: JAPAN DISPLAY INC.Inventors: Tae Kurokawa, Takeo Koito, Masashi Mitsui
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Publication number: 20230258304Abstract: The purpose of the present invention is to realize a lighting device of small light distribution angle and less leakage light and further to realize a lighting device in which the light beam is easy to control. The following is an example of the structure to meet the above purpose. A lighting device including: a light guide; LEDs set at a side surface of the light guide; a prism sheet set on a major surface of the light guide, in which a first louver which extends in a first direction and, a second louver which extends in an orthogonal direction to the first direction are superposed on the prism sheet.Type: ApplicationFiled: April 20, 2023Publication date: August 17, 2023Applicant: Japan Display Inc.Inventors: Makoto HASEGAWA, Takeo KOITO, Nobuyuki SUZUKI, Masafumi OKADA
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Publication number: 20230260433Abstract: According to an aspect, a display device includes: a liquid crystal display panel provided with a plurality of pixels; and a light source provided with a plurality of light emission points. The ratio of a pitch of the pixels arranged in a predetermined direction to a pitch of the light emission points arranged in the predetermined direction is 1:4n or 1:6n, and n is a natural number.Type: ApplicationFiled: February 13, 2023Publication date: August 17, 2023Inventors: Kazunari TOMIZAWA, Takeo KOITO