Patents by Inventor Takayuki Imai
Takayuki Imai 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: 20240118575Abstract: An optical device includes an optical element including a liquid crystal cell configured to distribute light emitted from a light source, a power supply part configured to generate first and second potentials, a control signal generation circuit part configured to generate a control signal that controls a pulse width of each of the first and second potentials, and a switch circuit part configured to output a first potential signal including the first potential with a first pulse width and the second potential with a second pulse width based on the control signal. The liquid crystal cell includes a first substrate on which first and second transparent electrodes are alternately arranged in a first direction, and a second substrate on which third and fourth transparent electrodes are alternately arranged in a second direction. The first potential signal is input to the first transparent electrode.Type: ApplicationFiled: December 20, 2023Publication date: April 11, 2024Inventors: Takayuki IMAI, Kojiro IKEDA, Takeo KOITO
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Patent number: 11944165Abstract: The molded surface fastener includes: a fastener member that has a plurality of engagement elements disposed upright on the first surface of a base portion, and a back member that is secured to the second surface of the fastener member and that is provided with a structure enabling passage of a synthetic resin. The base portion has a first base region of a predetermined thickness and a second base region formed to be thicker than the first base region, and the back member is secured to at least the second base region of the base portion. The adhesion strength of the back member to the fastener member is thus increased, enabling the back member to be held more firmly by the base portion.Type: GrantFiled: February 15, 2019Date of Patent: April 2, 2024Assignee: YKK CorporationInventors: Takayuki Matsui, Xu Zhang, Zhiyu Ren, Shinichi Imai
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Patent number: 11875759Abstract: According to one embodiment, a display device includes a display panel including pixels arranged in a matrix, a common electrode, a pixel electrode disposed for each of the pixels, and a liquid crystal layer containing a polymer and liquid crystal molecules, a light source, and a controller controlling a voltage between the common electrode and the pixel electrode, and controlling an operation of the light source. The controller applies a voltage corresponding to an image component to write the image component between the common electrode and the pixel electrode in order from the pixel located on an opposite side to the light source in a first period, and turns on the light source to display an image corresponding to the written image component on the display panel in the first period.Type: GrantFiled: June 2, 2021Date of Patent: January 16, 2024Assignee: Japan Display Inc.Inventors: Shunsuke Noichi, Takayuki Imai
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Patent number: 11854504Abstract: A display device includes: a display panel having a display region in which pixels are arranged; scan lines each coupled to the pixels arranged in a row direction; signal lines each coupled to the pixels arranged in a column direction; a signal line drive circuit; a scan line drive circuit selecting the scan lines; and a signal processing circuit. A second half period of a selection period of a first scan line overlaps a first half period of a selection period of a second scan line. The signal processing circuit adjusts a pixel gradation value of the pixel in an m-th column coupled to the second scan line when a difference value between the pixel gradation value of the pixel in the m-th column coupled to the first scan line and an average gradation value of the pixels arranged in the m-th column is larger than a predetermined value.Type: GrantFiled: May 15, 2023Date of Patent: December 26, 2023Assignee: Japan Display Inc.Inventors: Daijiro Takano, Takayuki Imai
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Publication number: 20230377529Abstract: A display device includes: a display panel having a display region in which pixels are arranged; scan lines each coupled to the pixels arranged in a row direction; signal lines each coupled to the pixels arranged in a column direction; a signal line drive circuit; a scan line drive circuit selecting the scan lines; and a signal processing circuit. A second half period of a selection period of a first scan line overlaps a first half period of a selection period of a second scan line. The signal processing circuit adjusts a pixel gradation value of the pixel in an m-th column coupled to the second scan line when a difference value between the pixel gradation value of the pixel in the m-th column coupled to the first scan line and an average gradation value of the pixels arranged in the m-th column is larger than a predetermined value.Type: ApplicationFiled: May 15, 2023Publication date: November 23, 2023Inventors: Daijiro TAKANO, Takayuki IMAI
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Publication number: 20230324746Abstract: According to one embodiment, a liquid crystal device includes a first liquid crystal cell, a second liquid crystal cell, a first flexible wiring board including a first terminal and connected to the first liquid crystal cell, a second flexible wiring board including a second terminal and connected to the second liquid crystal cell, and a circuit board including a first connector connected to the first terminal and a second connector connected to the second terminal. The first flexible wiring board and the second flexible wiring board are arranged without overlapping each other in plan view. A first distance from an edge of the circuit board to the first connector and a second distance from the edge to the second connector are different from each other.Type: ApplicationFiled: June 16, 2023Publication date: October 12, 2023Applicant: Japan Display Inc.Inventors: Yuuichi KANESAKA, Koichi NAGAO, Tomohide OOHIRA, Takayuki IMAI
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Patent number: 11726372Abstract: According to one embodiment, a liquid crystal device includes a first liquid crystal cell, a second liquid crystal cell, a first flexible wiring board including a first terminal and connected to the first liquid crystal cell, a second flexible wiring board including a second terminal and connected to the second liquid crystal cell, and a circuit board including a first connector connected to the first terminal and a second connector connected to the second terminal. The first flexible wiring board and the second flexible wiring board are arranged without overlapping each other in plan view. A first distance from an edge of the circuit board to the first connector and a second distance from the edge to the second connector are different from each other.Type: GrantFiled: October 12, 2021Date of Patent: August 15, 2023Assignee: Japan Display Inc.Inventors: Yuuichi Kanesaka, Koichi Nagao, Tomohide Oohira, Takayuki Imai
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Patent number: 11674472Abstract: A method of improving corrosion resistance of a cylinder cover including a port that is an intake port or an exhaust port. The cylinder cover is configured such that an annular cooling water passage is formed between an inner peripheral surface of the port and a valve seat ring when the valve seat ring is inserted in the port. The method includes forming a weld overlay layer on each of sealed regions of the inner peripheral surface of the port by laser metal deposition using a welding material made of a nickel-based alloy, a copper alloy, stainless steel, or a titanium alloy, the sealed regions being positioned at both sides of the cooling water passage, respectively.Type: GrantFiled: February 13, 2020Date of Patent: June 13, 2023Assignee: KAWASAKI JUKOGYO KABUSHIKI KAISHAInventors: Daichi Kubo, Yuto Sakane, Tomohiro Ueno, Ryo Morihashi, Hayato Iwasaki, Yuji Kamei, Hideaki Kurokawa, Yoshishige Sakai, Takayuki Imai
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Patent number: 11630338Abstract: According to one embodiment, a display device includes a display panel, a third transparent substrate, a light-emitting element, and a modulation element. The display panel includes a first transparent substrate, a second transparent substrate, a first liquid crystal layer of a polymer dispersed type held. The third transparent substrate has a first end portion. The light-emitting element is opposed to the first end portion. The modulation element includes a fourth transparent substrate and a fifth transparent substrate disposed between the light-emitting element and the first end portion, a second liquid crystal layer, and control electrodes for applying voltage to the second liquid crystal layer.Type: GrantFiled: June 1, 2021Date of Patent: April 18, 2023Assignee: Japan Display Inc.Inventors: Takayuki Imai, Takeo Koito
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Patent number: 11630347Abstract: According to one embodiment, a display device includes a first transparent substrate having a first side surface extending over a first area, a second area and a third area, a second transparent substrate opposed to the first transparent substrate in the third area, a polymer dispersed liquid crystal layer, a first wiring board mounted with a first light-emitting element in the first area, a second wiring board mounted with a second light-emitting element in the second area, a first terminal connected to a power supply in the first area, a second terminal connected to the second wiring board in the second area, and a first conductive layer arranged on the first side surface and connected to the first terminal and the second terminal.Type: GrantFiled: July 7, 2021Date of Patent: April 18, 2023Assignee: Japan Display Inc.Inventors: Takayuki Imai, Masayuki Ikari
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Publication number: 20230081391Abstract: A method of improving corrosion resistance of a cylinder cover including a port that is an intake port or an exhaust port. The cylinder cover is configured such that an annular cooling water passage is formed between an inner peripheral surface of the port and a valve seat ring when the valve seat ring is inserted in the port. The method includes forming a weld overlay layer on each of sealed regions of the inner peripheral surface of the port by laser metal deposition using a welding material made of a nickel-based alloy, a copper alloy, stainless steel, or a titanium alloy, the sealed regions being positioned at both sides of the cooling water passage, respectively.Type: ApplicationFiled: February 13, 2020Publication date: March 16, 2023Applicant: KAWASAKI JUKOGYO KABUSHIKI KAISHAInventors: Daichi KUBO, Yuto SAKANE, Tomohiro UENO, Ryo MORIHASHI, Hayato IWASAKI, Yuji KAMEI, Hideaki KUROKAWA, Yoshishige SAKAI, Takayuki IMAI
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Patent number: 11587519Abstract: A display device includes: first and second substrates with a liquid crystal therebetween; pixel electrodes and a common electrode provided to the first or second substrate; a light source including first to third light sources; and an image processor generating a signal to be provided to each pixel based on an input image signal. A frame period includes a first subframe period in which the first light source is on, a second subframe period in which the second light source is on, a third subframe period in which the third light source is on, and a fourth subframe period in which one or more of the first to third light sources are on. The image processor divides a gradation value into two values smaller than the gradation value, allocates one of the two values to the fourth subframe period, and allocates the other value to the other first subframe period.Type: GrantFiled: July 26, 2022Date of Patent: February 21, 2023Assignee: Japan Display Inc.Inventors: Takayuki Imai, Kentaro Okuyama
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Publication number: 20230033124Abstract: A display device includes: first and second substrates with a liquid crystal therebetween; pixel electrodes and a common electrode provided to the first or second substrate; a light source including first to third light sources; and an image processor generating a signal to be provided to each pixel based on an input image signal. A frame period includes a first subframe period in which the first light source is on, a second subframe period in which the second light source is on, a third subframe period in which the third light source is on, and a fourth subframe period in which one or more of the first to third light sources are on. The image processor divides a gradation value into two values smaller than the gradation value, allocates one of the two values to the fourth subframe period, and allocates the other value to the other first subframe period.Type: ApplicationFiled: July 26, 2022Publication date: February 2, 2023Inventors: Takayuki IMAI, Kentaro OKUYAMA
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Publication number: 20220113576Abstract: According to one embodiment, a liquid crystal device includes a first liquid crystal cell, a second liquid crystal cell, a first flexible wiring board including a first terminal and connected to the first liquid crystal cell, a second flexible wiring board including a second terminal and connected to the second liquid crystal cell, and a circuit board including a first connector connected to the first terminal and a second connector connected to the second terminal. The first flexible wiring board and the second flexible wiring board are arranged without overlapping each other in plan view. A first distance from an edge of the circuit board to the first connector and a second distance from the edge to the second connector are different from each other.Type: ApplicationFiled: October 12, 2021Publication date: April 14, 2022Applicant: Japan Display Inc.Inventors: Yuuichi KANESAKA, Koichi NAGAO, Tomohide OOHIRA, Takayuki IMAI
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Publication number: 20220011638Abstract: According to one embodiment, a display device includes a first transparent substrate having a first side surface extending over a first area, a second area and a third area, a second transparent substrate opposed to the first transparent substrate in the third area, a polymer dispersed liquid crystal layer, a first wiring board mounted with a first light-emitting element in the first area, a second wiring board mounted with a second light-emitting element in the second area, a first terminal connected to a power supply in the first area, a second terminal connected to the second wiring board in the second area, and a first conductive layer arranged on the first side surface and connected to the first terminal and the second terminal.Type: ApplicationFiled: July 7, 2021Publication date: January 13, 2022Applicant: Japan Display Inc.Inventors: Takayuki IMAI, Masayuki IKARI
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Publication number: 20210373366Abstract: According to one embodiment, a display device includes a display panel, a third transparent substrate, a light-emitting element, and a modulation element. The display panel includes a first transparent substrate, a second transparent substrate, a first liquid crystal layer of a polymer dispersed type held. The third transparent substrate has a first end portion. The light-emitting element is opposed to the first end portion. The modulation element includes a fourth transparent substrate and a fifth transparent substrate disposed between the light-emitting element and the first end portion, a second liquid crystal layer, and control electrodes for applying voltage to the second liquid crystal layer.Type: ApplicationFiled: June 1, 2021Publication date: December 2, 2021Applicant: Japan Display Inc.Inventors: Takayuki IMAI, Takeo KOITO
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Patent number: 11170712Abstract: According to one embodiment, a display device includes a display panel in which pixel units are arranged, and a controller configured to generate image signals by multiplying display data externally supplied to each line by a luminosity adjustment factor, to supply the generated image signals to the pixel units, to accumulate power consumption of each line, and to execute black insertion if the accumulated power consumption is determined to be greater than power consumption of one previous display frame by a predetermined value, wherein the luminosity adjustment factor is acquired by substituting the power consumption of one previous frame to a decreasing function, and a display pattern including a plurality of continuing black display lines is synchronized with supply of the image signals and is displayed moving the same direction of a screen scanning direction of the display panel during the black insertion.Type: GrantFiled: April 5, 2019Date of Patent: November 9, 2021Assignee: JAPAN DISPLAY INC.Inventors: Takayuki Imai, Norio Nakamura
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Publication number: 20210287623Abstract: According to one embodiment, a display device includes a display panel including pixels arranged in a matrix, a common electrode, a pixel electrode disposed for each of the pixels, and a liquid crystal layer containing a polymer and liquid crystal molecules, a light source, and a controller controlling a voltage between the common electrode and the pixel electrode, and controlling an operation of the light source. The controller applies a voltage corresponding to an image component to write the image component between the common electrode and the pixel electrode in order from the pixel located on an opposite side to the light source in a first period, and turns on the light source to display an image corresponding to the written image component on the display panel in the first period.Type: ApplicationFiled: June 2, 2021Publication date: September 16, 2021Applicant: Japan Display Inc.Inventors: Shunsuke NOICHI, Takayuki IMAI
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Patent number: 10509268Abstract: According to an aspect, a display device includes: a first translucent substrate; a second translucent substrate facing the first translucent substrate; a liquid crystal layer including polymer dispersed liquid crystal sealed between the first translucent substrate and the second translucent substrate; at least one light emitter facing at least one of a side surface of the first translucent substrate or a side surface of the second translucent substrate; and a display controller that controls transmittance of light passing through the first translucent substrate and the second translucent substrate. A non-light-emitting period in which the at least one light emitter does not emit light is provided between a plurality of light-emitting periods in which the at least one light emitter emits light.Type: GrantFiled: April 3, 2018Date of Patent: December 17, 2019Assignee: Japan Display Inc.Inventors: Tae Kurokawa, Kentaro Okuyama, Takayuki Imai
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Publication number: 20190237015Abstract: According to one embodiment, a display device includes a display panel in which pixel units are arranged, and a controller configured to generate image signals by multiplying display data externally supplied to each line by a luminosity adjustment factor, to supply the generated image signals to the pixel units, to accumulate power consumption of each line, and to execute black insertion if the accumulated power consumption is determined to be greater than power consumption of one previous display frame by a predetermined value, wherein the luminosity adjustment factor is acquired by substituting the power consumption of one previous frame to a decreasing function, and a display pattern including a plurality of continuing black display lines is synchronized with supply of the image signals and is displayed moving the same direction of a screen scanning direction of the display panel during the black insertion.Type: ApplicationFiled: April 5, 2019Publication date: August 1, 2019Applicant: JAPAN DISPLAY INC.Inventors: Takayuki IMAI, Norio Nakamura