Patents by Inventor Koji Murata
Koji Murata 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: 11016552Abstract: To provide an image forming apparatus whose detection range of a person by using a pyroelectric sensor is adjustable without adjusting sensitivity of the pyroelectric sensor, an image forming apparatus includes: an image forming apparatus main body; and a pyroelectric sensor that detects presence of a person based on light received from the periphery of the image forming apparatus main body, wherein the pyroelectric sensor is rotatably mounted to the image forming apparatus main body.Type: GrantFiled: January 28, 2019Date of Patent: May 25, 2021Assignee: KYOCERA Document Solutions Inc.Inventor: Koji Murata
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Publication number: 20210132450Abstract: The present invention provides a liquid crystal display device of a transverse electric field mode that may inhibit internal reflection and realize proper black display to which coloring does not occur. The present invention provides a liquid crystal display device including a first linear polarizer, a first ?/4 retardation layer, a first substrate, a second ?/4 retardation layer configured with a different material from the first ?/4 retardation layer, a liquid crystal layer that contains liquid crystals which are horizontally aligned in a case where no voltage is applied, plural electrode pairs that generate a transverse electric field in the liquid crystal layer by a voltage being applied, a second substrate, a second linear polarizer, and a backlight. In a case where a color of light emitted from the backlight is expressed by using chromaticity coordinates (x, y) of an XYZ color system, both of x and y are 0.32 or greater.Type: ApplicationFiled: July 6, 2018Publication date: May 6, 2021Inventors: AKIRA SAKAI, YUICHI KAWAHIRA, KOJI MURATA, MASAHIRO HASEGAWA, TAKAKO KOIDE, KOZO NAKAMURA, KIYOSHI MINOURA
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Publication number: 20210124223Abstract: A liquid crystal display device includes: a liquid crystal panel including an active matrix substrate, a liquid crystal layer, and a color filter substrate in a stated order, the active matrix substrate including a first substrate, and a first electrode and second electrodes stacked with an insulating layer in between, the second electrodes arranged in the respective sub-pixels, the color filter substrate including a second substrate, a color filter, and a third electrode, either the first electrode or the second electrodes arranged with electrical connection over the sub-pixels, each of the sub-pixels provided with an optical opening, the third electrode not superimposed with at least a portion of each of the optical openings in a plan view and arranged with electrical connection, a control circuit configured to switch between application of alternating voltage and application of constant voltage to the third electrode.Type: ApplicationFiled: October 22, 2020Publication date: April 29, 2021Inventors: KOJI MURATA, HIDEFUMI YOSHIDA
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Patent number: 10989954Abstract: A liquid crystal display device of the present invention includes in the following order from a viewing surface side a first polarizer, a first positive A plate having an in-plane retardation of 120 nm or greater and 155 nm or smaller, a positive C plate having a thickness retardation of 80 nm or greater and 100 nm or smaller, a first substrate, a second positive A plate having an in-plane retardation of 120 nm or greater and 155 nm or smaller, a horizontally aligned liquid crystal layer, a second substrate, a viewing angle compensation layer, and a second polarizer. The device further includes between the first polarizer and the first positive A plate a positive C plate having a thickness retardation of 30 nm or greater and 80 nm or smaller.Type: GrantFiled: September 26, 2019Date of Patent: April 27, 2021Assignee: SHARP KABUSHIKI KAISHAInventors: Masahiro Hasegawa, Akira Sakai, Takako Koide, Yuichi Kawahira, Koji Murata, Kiyoshi Minoura
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Patent number: 10983396Abstract: The present invention relates to a method for producing a liquid crystal panel. The method includes curing a first reactive mesogen layer with ultraviolet light at an illuminance within a range of 40 to 90 mW/cm2. The liquid crystal panel includes a first transparent base material, a TFT layer and a first alignment film stacked in order on the first transparent base material, a second transparent base material, a color filter layer, an in-cell retardation layer, and a second alignment film stacked in order on the second transparent base material, a liquid crystal layer sandwiched between the first alignment film and the second alignment film, an out-cell retardation layer disposed on a side opposite to a color filter layer side of the second transparent base material, and a pair of linearly polarizing plates arranged so as to sandwich the first transparent base material and the out-cell retardation layer and having transmission axes orthogonal to each other.Type: GrantFiled: March 25, 2020Date of Patent: April 20, 2021Assignee: SHARP KABUSHIKI KAISHAInventors: Koji Murata, Akira Sakai, Yuichi Kawahira, Takako Koide, Masahiro Hasegawa, Kiyoshi Minoura
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Publication number: 20210109269Abstract: The present invention provides: (I) a display device including a display panel, a retardation layer, and a polarizer which are stacked in the stated order from a back surface side to a viewing surface side and integrated without an adhesive layer; and (II) a method for producing a display device including: forming a first alignment film on a display panel, applying a solution containing first polymerizable liquid crystal to the first alignment film, and curing the first polymerizable liquid crystal to produce a retardation layer; and forming a second alignment film on the retardation layer, applying a solution containing second polymerizable liquid crystal and a dichroic material to the second alignment film, and curing the second polymerizable liquid crystal to produce a polarizer.Type: ApplicationFiled: March 23, 2018Publication date: April 15, 2021Applicant: SHARP KABUSHIKI KAISHAInventors: AKIRA SAKAI, MASAHIRO HASEGAWA, ATSUSHI BAN, KOJI MURATA, YUICHI KAWAHIRA, KIYOSHI MINOURA, TAKAKO KOIDE, KOZO NAKAMURA
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Publication number: 20210103083Abstract: The present invention provides a method for producing a retardation film excellent in retardation controllability against heat and the retardation film. The method for producing a retardation film includes, in the following order: fixing an alignment of liquid crystal compounds to form a retardation giving layer, and heating the retardation giving layer. Preferably, the heating is first heating and the method further includes second heating for heating the retardation giving layer after the first heating.Type: ApplicationFiled: July 18, 2017Publication date: April 8, 2021Inventors: KOJI MURATA, AKIRA SAKAI, YUICHI KAWAHIRA, MASAHIRO HASEGAWA, TAKAKO KOIDE, KOZO NAKAMURA, KIYOSHI MINOURA
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Patent number: 10962839Abstract: The liquid crystal display panel includes in the following order from a viewing surface side to a back surface side: a first polarizer; a first ?/4 retardation layer; a first substrate; a second ?/4 retardation layer; a liquid crystal layer; a second substrate; and a second polarizer, the liquid crystal display panel being in a transverse electric field mode, the first substrate including a color filter layer in a display region, the second ?/4 retardation layer being a single layer covering the color filter layer and including a first retardation portion in an end region of the display region and a second retardation portion in a central region of the display region, the first retardation portion having a greater thickness than the second retardation portion, and the first retardation portion and the second retardation portion differing from each other in in-plane retardation by 10 nm or less.Type: GrantFiled: November 28, 2018Date of Patent: March 30, 2021Assignee: SHARP KABUSHIKI KAISHAInventors: Yuichi Kawahira, Kiyoshi Minoura, Akira Sakai, Takako Koide, Masahiro Hasegawa, Koji Murata
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Patent number: 10948778Abstract: A liquid crystal display panel of the present invention includes, sequentially from the viewer side: a first linearly polarizing plate; a first ?/4-wavelength layer; a first substrate including a color filter, a black matrix, and a second ?/4-wavelength layer; a liquid crystal layer; a second substrate; and a second linearly polarizing plate, the liquid crystal display panel further including a sealing material disposed so as to surround the liquid crystal layer in a plan view, wherein the second ?/4-wavelength layer is disposed closer to the liquid crystal layer than the color filter and the black matrix are and such that an outer edge of the second ?/4-wavelength layer lies inside an arrangement region of the sealing material, and the first ?/4-wavelength layer and the second ?/4-wavelength layer are disposed such that their slow axes are perpendicular to each other.Type: GrantFiled: July 28, 2017Date of Patent: March 16, 2021Assignee: SHARP KABUSHIKI KAISHAInventors: Masahiro Hasegawa, Koji Murata, Yuichi Kawahira, Takako Koide, Kozo Nakamura, Akira Sakai, Kiyoshi Minoura
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Patent number: 10942411Abstract: A liquid crystal display device of the present invention includes: a first substrate including a pair of counter electrodes; a second substrate including a pixel electrode and a common electrode; and a liquid crystal layer that includes liquid crystal molecules aligned horizontally with the substrates. The liquid crystal display device is configured to perform display in any of multiple display modes. The multiple display modes include: a first display mode of performing display in a first state where an alternating-current voltage is applied at a first frequency between the pair of counter electrodes; and a second display mode of performing display in at least one of a second state where no voltage is applied between the pair of counter electrodes, or a third state where an alternating-current voltage is applied at a second frequency that is higher than the first frequency between the pair of counter electrodes.Type: GrantFiled: February 10, 2020Date of Patent: March 9, 2021Assignee: SHARP KABUSHIKI KAISHAInventors: Koji Murata, Hidefumi Yoshida
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Patent number: 10937608Abstract: An operation panel includes a push key and a switch. The push key is depressed through an opening formed in a panel body. The switch is pushed by depressing of the push key. The push key includes a tapered part tapered toward the switch. The panel body includes an elastic piece inclined toward the tapered part from a circumference of the opening and elastically deformable to an opposite side to the tapered part. When the push key is depressed, the elastic piece is elastically deformed to the opposite side by the tapered part. When the depressing of the push key is released, the push key is pushed up by an elastic restoring force of the elastic piece.Type: GrantFiled: October 7, 2019Date of Patent: March 2, 2021Assignee: KYOCERA Document Solutions Inc.Inventor: Koji Murata
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Patent number: 10890805Abstract: A liquid crystal display device includes sequentially from a viewing surface side: a first polarizer; an out-cell retardation layer; a first substrate; an in-cell retardation layer; a horizontally aligned liquid crystal layer; a second substrate; and a second polarizer. The liquid crystal display device includes a viewing angle compensation film between the first polarizer and the out-cell retardation layer or between the second substrate and the second polarizer. The out-cell retardation layer is a laminate including sequentially from a viewing surface side: a first retardation layer having an NZ coefficient of 1.0-1.1 and an Re of 120 nm or greater and smaller than 137.5 nm; and a second retardation layer having an Re of 0-10 nm and an Rth of 80-150 nm. The in-cell retardation layer is a third retardation layer having an NZ coefficient of 0.7-1.4 and an Re of 120 nm or greater and smaller than 137.5 nm.Type: GrantFiled: December 5, 2019Date of Patent: January 12, 2021Assignee: SHARP KABUSHIKI KAISHAInventors: Masahiro Hasegawa, Akira Sakai, Takako Koide, Yuichi Kawahira, Koji Murata, Kiyoshi Minoura
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Patent number: 10808929Abstract: Formed in a wall part of a dome part of an annular combustor encircling an axis of a gas turbine engine are multiple fuel supply holes spaced at predetermined intervals in circumferential direction around the axis and many cooling holes extending through the wall part in direction inclined to a normal thereof. When two adjacent fuel supply holes are defined as first and second fuel supply holes, a virtual boundary line contacting an outer semi-circular portion, far from the axis, of the first fuel supply hole and an inner semi-circular portion, close to the axis, of the second fuel supply hole is set. The first cooling holes in region radially outward, relative to the axis, of the line are inclined toward the second fuel supply hole, and the second cooling holes in region radially inward, relative to the axis, of the line are inclined toward the first fuel supply hole.Type: GrantFiled: July 27, 2016Date of Patent: October 20, 2020Assignee: HONDA MOTOR CO., LTD.Inventors: Yasuharu Kamoi, Koji Murata
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Patent number: 10802187Abstract: A circularly polarizing plate includes: a first retardation layer having negative refractive index anisotropy; a second retardation layer having positive refractive index anisotropy; and a linear polarizer, the first retardation layer and the second retardation layer being disposed such that their optical axes are parallel to each other, the first retardation layer providing an in-plane retardation whose absolute value is |R1(?)| to light having a wavelength of ? nm, the second retardation layer providing an in-plane retardation whose absolute value is |R2(?)| to light having a wavelength of ? nm, the first retardation layer and the second retardation layer satisfying the following formulas (1) to (4): |R1(450)|>|R1(550)|>|R1(650)|??(1) |R2(550)|>|R1(550)|??(2) |R2(550)|?|R1(550)|>|R2(450)|?|R1(450)|??(3) |R2(650)|?|R1(650)|>|R2(550)|?|R1(550)|??(4).Type: GrantFiled: March 4, 2019Date of Patent: October 13, 2020Assignee: SHARP KABUSHIKI KAISHAInventors: Akira Sakai, Masahiro Hasegawa, Koji Murata, Yuichi Kawahira, Takako Koide, Kiyoshi Minoura
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Patent number: 10802343Abstract: A liquid crystal device (LCD) is configured for minimizing unwanted internal ambient light reflections. The LCD includes a plurality of layers, the layers comprising from a viewing side: a first linear polariser; an external retarder that is made of a cyclic olefin polymer (COP) material or a cyclic olefin copolymer (COC) material; a colour filter substrate; a colour filter layer; an internal reactive mesogen (RM) retarder alignment layer; an internal reactive mesogen (RM) retarder; a liquid crystal (LC) layer; and a second linear polarizer. The external retarder and the internal RM retarder are configured such that the optical properties (for example light polarization control function) of the external retarder and the internal retarder are matched to negate each other for light passing through the external retarder and the internal RM retarder. The LCD simultaneously maintains high image quality in both high and low ambient lighting conditions.Type: GrantFiled: March 12, 2018Date of Patent: October 13, 2020Assignee: Sharp Kabushiki KaishaInventors: Nathan James Smith, Andrew Acreman, Hywel Hopkin, Kiyoshi Minoura, Koji Murata, Yuichi Kawahira, Akira Sakai, Jiyun Yu
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Patent number: 10795197Abstract: The present invention relates to a liquid crystal panel including in the following order from a viewing surface side: an antireflection film; a circularly polarizing plate including a linearly polarizing plate and an out-cell retarder; a touch panel including a support and a detection electrode; a panel substrate; and an in-cell retarder, the support having a retardation slow axis that forms an angle of 40° to 50° with a slow axis of the in-cell retarder and with a slow axis of the out-cell retarder, the support having a retardation of 3 nm or smaller.Type: GrantFiled: August 21, 2019Date of Patent: October 6, 2020Assignee: SHARP KABUSHIKI KAISHAInventors: Yuichi Kawahira, Koji Murata, Takako Koide, Masahiro Hasegawa, Akira Sakai
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Publication number: 20200310201Abstract: The liquid crystal display panel includes a first substrate, a second substrate, and a liquid crystal layer provided between the first substrate and the second substrate. The first substrate includes a first dielectric substrate, a first electrode and a second electrode provided on the first dielectric substrate and capable of generating a horizontal electric field in the liquid crystal layer, and a first alignment film being in contact with the liquid crystal layer. The second substrate includes a second dielectric substrate and a second alignment film provided on the second dielectric substrate and being in contact with the liquid crystal layer. The first alignment film has an azimuthal anchoring strength lower than the second alignment film. The liquid crystal layer includes a nematic liquid crystal material and a polymer network.Type: ApplicationFiled: March 27, 2020Publication date: October 1, 2020Inventors: KOJI MURATA, KIYOSHI MINOURA, AKIRA SAKAI, YUICHI KAWAHIRA, KOHZOH NAKAMURA
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Publication number: 20200310182Abstract: The present invention relates to a method for producing a liquid crystal panel. The method includes curing a first reactive mesogen layer with ultraviolet light at an illuminance within a range of 40 to 90 mW/cm2. The liquid crystal panel includes a first transparent base material, a TFT layer and a first alignment film stacked in order on the first transparent base material, a second transparent base material, a color filter layer, an in-cell retardation layer, and a second alignment film stacked in order on the second transparent base material, a liquid crystal layer sandwiched between the first alignment film and the second alignment film, an out-cell retardation layer disposed on a side opposite to a color filter layer side of the second transparent base material, and a pair of linearly polarizing plates arranged so as to sandwich the first transparent base material and the out-cell retardation layer and having transmission axes orthogonal to each other.Type: ApplicationFiled: March 25, 2020Publication date: October 1, 2020Inventors: KOJI MURATA, AKIRA SAKAI, YUICHI KAWAHIRA, TAKAKO KOIDE, MASAHIRO HASEGAWA, KIYOSHI MINOURA
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Publication number: 20200310200Abstract: A photo-alignment film of the present invention includes a polymer layer containing a photoreactive polymer and metal nanoparticles dispersed in the polymer layer at a concentration of 109 particles/(cm2×100 nm) or more and 1019 particles/(cm2×100 nm) or less. The metal nanoparticles have an absorption peak in a wavelength region of 420 nm or less. An absorbance A1 at the absorption peak of the metal nanoparticles and an absorbance A2 at an absorption peak of the polymer layer satisfy a relationship represented by the following formula 1: 0.2?A1/A2?25??(Formula 1).Type: ApplicationFiled: March 26, 2020Publication date: October 1, 2020Inventors: KOJI MURATA, AKIRA SAKAI, YUICHI KAWAHIRA, TAKAKO KOIDE, MASAHIRO HASEGAWA, KIYOSHI MINOURA
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Publication number: 20200257143Abstract: A liquid crystal display device of the present invention includes: a first substrate including a pair of counter electrodes; a second substrate including a pixel electrode and a common electrode; and a liquid crystal layer that includes liquid crystal molecules aligned horizontally with the substrates. The liquid crystal display device is configured to perform display in any of multiple display modes. The multiple display modes include: a first display mode of performing display in a first state where an alternating-current voltage is applied at a first frequency between the pair of counter electrodes; and a second display mode of performing display in at least one of a second state where no voltage is applied between the pair of counter electrodes, or a third state where an alternating-current voltage is applied at a second frequency that is higher than the first frequency between the pair of counter electrodes.Type: ApplicationFiled: February 10, 2020Publication date: August 13, 2020Inventors: KOJI MURATA, HIDEFUMI YOSHIDA