Patents by Inventor Kohzoh Nakamura
Kohzoh Nakamura 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: 20240087513Abstract: A display device includes a plurality of scanning signal lines; a plurality of data signal lines; and a plurality of subpixel circuits disposed at least at some of intersection points of the plurality of scanning signal lines and the plurality of data signal lines, each one of the plurality of subpixel circuits including a control circuit including a transistor and a light-emitting element, wherein an average density of subpixel circuits provided in a display region is greater than an average density of the subpixel circuits provided in a sparse pixel region, and the sparse pixel region includes a no-pixel region not including the subpixel circuits in one entire line in an extending direction of the scanning signal lines or the data signal lines-provided in the display region.Type: ApplicationFiled: January 19, 2021Publication date: March 14, 2024Inventor: KOHZOH NAKAMURA
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Patent number: 11895891Abstract: A display device includes a plurality of subpixels. The plurality of subpixels include a first subpixel including a first light-emitting layer, and a first subpixel circuit, a second subpixel including a second light-emitting layer, and a second subpixel circuit, a third subpixel including a third light-emitting layer, and a third subpixel circuit, and a fourth subpixel including a fourth light-emitting layer, and a fourth subpixel circuit. An area of an opening exposing a first electrode in the first subpixel is larger than an area of the opening exposing the first electrode in each of the second subpixel, the third subpixel, and the fourth subpixel. A plurality of light emission control lines include a first light emission control line connected to the first subpixel circuit and the third subpixel circuit, and a second emission control line connected to the second subpixel circuit and the fourth subpixel circuit.Type: GrantFiled: September 28, 2018Date of Patent: February 6, 2024Assignee: SHARP KABUSHIKI KAISHAInventor: Kohzoh Nakamura
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Patent number: 11552130Abstract: A display device includes a first subpixel including a light-emitting layer of a first color, a second subpixel adjacent to the first subpixel in a row direction or a column direction, the second subpixel including a light-emitting layer of a second color, and a third subpixel adjacent to the first subpixel and the second subpixel in a diagonal direction, the third subpixel including a light-emitting layer of a third color, wherein the first subpixel to the third subpixel include light-emitting regions that are geometrically similar to one another, the light-emitting regions of two of the first subpixel to the third subpixel are in the same size, and a light-emitting region of remaining one of the first subpixel to the third subpixel is larger than the light-emitting regions of the two of the first subpixel to the third subpixel.Type: GrantFiled: July 31, 2017Date of Patent: January 10, 2023Assignee: SHARP KABUSHIKI KAISHAInventors: Kohzoh Nakamura, Tamotsu Sakai
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Patent number: 11437600Abstract: In the present embodiment, a sealing agent (50) sealing two substates contains a low melting-point glass material and is adhered to each of a first substrate (10) and a second substrate (20), a barrier rib (60), which is formed in such a manner as to surround the outer periphery of an electronic element (30), is disposed between the sealing agent (50) and the electronic element (30), and between the first substrate (10) and the second substrate (20), and the sealing agent (50) is spaced apart from the barrier rib (60). As a result, a deterioration of the electronic element, caused by the heat produced when sealing, may be prevented while the electronic element formed between the two substrates is protected from moisture and oxygen.Type: GrantFiled: November 17, 2021Date of Patent: September 6, 2022Assignee: SHARP KABUSHIKI KAISHAInventors: Yuhki Kobayashi, Shinichi Kawato, Kiyoshi Minoura, Shinji Shimada, Hiroshi Tsuchiya, Masahiro Mitani, Kohzoh Nakamura, Katsuhiko Kishimoto, Yozo Narutaki
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Patent number: 11387283Abstract: A display device includes a plurality of subpixels. The plurality of subpixels include a first subpixel including a first light-emitting layer, and a first subpixel circuit, a second subpixel including a second light-emitting layer, and a second subpixel circuit, a third sub subpixel including a third light-emitting layer, and a third subpixel circuit, a fourth subpixel including a fourth light-emitting layer, and a fourth subpixel circuit, and a fifth subpixel including a fifth light-emitting layer, and a fifth subpxiel circuit. A plurality of scanning lines include a first scanning line connected to the fifth subpixel circuit and a second scanning line adjacent to the first scanning line and connected to the first subpixel circuit. A plurality of data lines include a first data line connected to the first subpixel circuit and the fifth subpixel circuit.Type: GrantFiled: September 28, 2018Date of Patent: July 12, 2022Assignee: SHARP KABUSHIKI KAISHAInventor: Kohzoh Nakamura
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Publication number: 20220158141Abstract: A display device includes an active matrix substrate including a transistor element and a light-emitting element layer provided on the active matrix substrate and including a first electrode, a second electrode, a function layer including a light-emitting layer between the first electrode and the second electrode, and a sealing layer. The display device includes: a half mirror provided on a display surface side of the light-emitting element layer; and a first ?/4 plate, a reflective polarizer, and an absorbing polarizer which are provided in order from the light-emitting element layer side between the light-emitting element layer and the half mirror.Type: ApplicationFiled: March 1, 2019Publication date: May 19, 2022Inventors: RYUZO YUKI, Kiyoshi MINOURA, KOHZOH NAKAMURA, AKIRA SAKAI
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Patent number: 11307463Abstract: 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: GrantFiled: March 27, 2020Date of Patent: April 19, 2022Assignee: SHARP KABUSHIKI KAISHAInventors: Koji Murata, Kiyoshi Minoura, Akira Sakai, Yuichi Kawahira, Kohzoh Nakamura
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Publication number: 20220077421Abstract: In the present embodiment, a sealing agent (50) sealing two substates contains a low melting-point glass material and is adhered to each of a first substrate (10) and a second substrate (20), a barrier rib (60), which is formed in such a manner as to surround the outer periphery of an electronic element (30), is disposed between the sealing agent (50) and the electronic element (30), and between the first substrate (10) and the second substrate (20), and the sealing agent (50) is spaced apart from the barrier rib (60). As a result, a deterioration of the electronic element, caused by the heat produced when sealing, may be prevented while the electronic element formed between the two substrates is protected from moisture and oxygen.Type: ApplicationFiled: November 17, 2021Publication date: March 10, 2022Inventors: Yuhki KOBAYASHI, Shinichi KAWATO, Kiyoshi MINOURA, Shinji SHIMADA, Hiroshi TSUCHIYA, Masahiro MITANI, Kohzoh NAKAMURA, Katsuhiko KISHIMOTO, Yozo NARUTAKI
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Publication number: 20220045139Abstract: A display device includes a plurality of subpixels. The plurality of subpixels include a first subpixel including a first light-emitting layer, and a first subpixel circuit, a second subpixel including a second light-emitting layer, and a second subpixel circuit, a third subpixel including a third light-emitting layer, and a third subpixel circuit, and a fourth subpixel including a fourth light-emitting layer, and a fourth subpixel circuit. An area of an opening exposing a first electrode in the first subpixel is larger than an area of the opening exposing the first electrode in each of the second subpixel, the third subpixel, and the fourth subpixel. A plurality of light emission control lines include a first light emission control line connected to the first subpixel circuit and the third subpixel circuit, and a second emission control line connected to the second subpixel circuit and the fourth subpixel circuit.Type: ApplicationFiled: September 28, 2018Publication date: February 10, 2022Inventor: KOHZOH NAKAMURA
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Patent number: 11211579Abstract: In the present embodiment, a sealing agent (50) sealing two substates contains a low melting-point glass material and is adhered to each of a first substrate (10) and a second substrate (20), a barrier rib (60), which is formed in such a manner as to surround the outer periphery of an electronic element (30), is disposed between the sealing agent (50) and the electronic element (30), and between the first substrate (10) and the second substrate (20), and the sealing agent (50) is spaced apart from the barrier rib (60). As a result, a deterioration of the electronic element, caused by the heat produced when sealing, may be prevented while the electronic element formed between the two substrates is protected from moisture and oxygen.Type: GrantFiled: September 27, 2017Date of Patent: December 28, 2021Assignees: SHARP KABUSHIKI KAISHA, SAKAI DISPLAY PRODUCTS CORPORATIONInventors: Yuhki Kobayashi, Shinichi Kawato, Kiyoshi Minoura, Shinji Shimada, Hiroshi Tsuchiya, Masahiro Mitani, Kohzoh Nakamura, Katsuhiko Kishimoto, Yozo Narutaki
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Patent number: 11211431Abstract: A first subpixel and a second subpixel that are adjacent to each other in a row direction, a third subpixel, and a fourth subpixel and a fifth subpixel that are adjacent to each other in the row direction are provided. Each of the first subpixel and the fourth subpixel that are arrayed in a column direction includes a first-color light-emitting layer. Each of the second subpixel and the fifth subpixel that are arrayed in the column direction includes a second-color light-emitting layer. The third subpixel including a third-color light-emitting layer is adjacent in a diagonal direction to or adjacent in the column direction to at least two of the first subpixel, the second subpixel, the fourth subpixel, and the fifth subpixel.Type: GrantFiled: July 31, 2017Date of Patent: December 28, 2021Assignee: SHARP KABUSHIKI KAISHAInventor: Kohzoh Nakamura
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Publication number: 20210399064Abstract: A display device includes a plurality of subpixels. The plurality of subpixels include a first subpixel including a first light-emitting layer, and a first subpixel circuit, a second subpixel including a second light-emitting layer, and a second subpixel circuit, a third sub subpixel including a third light-emitting layer, and a third subpixel circuit, a fourth subpixel including a fourth light-emitting layer, and a fourth subpixel circuit, and a fifth subpixel including a fifth light-emitting layer, and a fifth subpxiel circuit. A plurality of scanning lines include a first scanning line connected to the fifth subpixel circuit and a second scanning line adjacent to the first scanning line and connected to the first subpixel circuit. A plurality of data lines-include a first data line connected to the first subpixel circuit and the fifth subpixel circuit.Type: ApplicationFiled: September 28, 2018Publication date: December 23, 2021Inventor: KOHZOH NAKAMURA
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Patent number: 11099434Abstract: A liquid crystal display panel performs displaying in the normally white mode. A first and a second polarizer are disposed so that the transmission axes thereof are perpendicular to each other. A liquid crystal layer is in a twisted alignment state in the absence of an applied voltage. A first substrate has a first electrode having a plurality of rectangular openings extending in parallel to each other, and a second electrode facing the first electrode with a dielectric layer interposed therebetween. The openings each independently have a width S of more than 0.6 ?m and not more than 1.4 ?m, and each pair of adjacent openings independently has a distance L therebetween of not less than 0.3 ?m and not more than 0.7 ?m. A first and a second horizontal alignment film each have an azimuthal anchoring energy of not more than 1×10?4J/m2.Type: GrantFiled: February 3, 2020Date of Patent: August 24, 2021Assignee: SHARP KABUSHIKI KAISHAInventors: Koji Murata, Kohzoh Nakamura, Kiyoshi Minoura, Akira Sakai, Yuichi Kawahira
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Patent number: 10984686Abstract: A display device according to one embodiment of the present invention is provided with a plurality of pixels which are arranged as a matrix on a substrate, and each of which is provided with a liquid crystal display element and an organic EL display element. The organic EL display element is provided with a positive electrode and a negative electrode, which are formed so as to be electrically separated from a pixel electrode and a counter electrode of the liquid crystal display element.Type: GrantFiled: September 8, 2020Date of Patent: April 20, 2021Assignees: SHARP KABUSHIKI KAISHA, SAKAI DISPLAY PRODUCTS CORPORATIONInventors: Masahiro Mitani, Kohzoh Nakamura, Kiyoshi Minoura, Hiroshi Tsuchiya, Yozo Narutaki
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Patent number: 10923678Abstract: A reflective liquid crystal display device (30) including a reflection electrode (31), a liquid crystal layer (32), and a counter electrode (33) is formed above an insulating layer (25) in a first region (R) of a TFT substrate (20). An organic EL display device (40) including a first electrode (41), an organic layer (43), and a second electrode (44) is formed on the insulating layer (25) of the TFT substrate (20) in a second region (T). A coating layer (45) is formed at least on a surface of the organic EL display device (40) so as to wrap the second electrode (44) and the organic layer (43) of the organic EL display device (40). A part of the coating layer (45) is in contact with the insulating layer (25). As a result, a complex display apparatus capable of preventing the organic layer from deteriorating and excellent in reliability can be obtained.Type: GrantFiled: December 11, 2019Date of Patent: February 16, 2021Assignees: Sakai Display Products Corporation, Sharp Kabushiki KaishaInventors: Yozo Narutaki, Katsuhiko Kishimoto, Shinji Shimada, Masahiro Mitani, Kohzoh Nakamura, Kiyoshi Minoura, Hiroshi Tsuchiya, Yuhki Kobayashi, Shinichi Kawato
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Publication number: 20200402430Abstract: A display device according to one embodiment of the present invention is provided with a plurality of pixels which are arranged as a matrix on a substrate, and each of which is provided with a liquid crystal display element and an organic EL display element. The organic EL display element is provided with a positive electrode and a negative electrode, which are formed so as to be electrically separated from a pixel electrode and a counter electrode of the liquid crystal display element.Type: ApplicationFiled: September 8, 2020Publication date: December 24, 2020Inventors: MASAHIRO MITANI, KOHZOH NAKAMURA, KIYOSHI MINOURA, HIROSHI TSUCHIYA, YOZO NARUTAKI
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Patent number: 10803775Abstract: A display apparatus according to one embodiment comprises pixels each comprising a liquid crystal display element (LC element) and an organic EL display element (EL element). The EL element comprises an anode and a cathode electrically separated from each electrode of the LC element. Each pixel comprises a first transistor which changes the magnitude of a current flowing through the EL element based on the potential of a first bus line; a second transistor which electrically separates the first bus line and the LC element; and a third transistor which electrically connects the first and second transistor with the first bus line. A method for driving a display device according to one embodiment reduces the potential difference between the pixel electrode and the counter electrode before turning off the second transistor during switching from display by the LC element to display by the EL element.Type: GrantFiled: September 20, 2017Date of Patent: October 13, 2020Assignees: SHARP KABUSHIKI KAISHA, SAKAI DISPLAY PRODUCTS CORPORATIONInventors: Masahiro Mitani, Kohzoh Nakamura, Kiyoshi Minoura, Hiroshi Tsuchiya, Yozo Narutaki
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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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Patent number: 10756310Abstract: Provided is a display device including a first light emitting layer having an island shape, a second light emitting layer having an island shape, and a third light emitting layer having an island shape, between a lower electrode layer and an upper electrode layer. The first light emitting layer and the second light emitting layer are adjacent in a column direction, and the third light emitting layer is adjacent to the first light emitting layer and the second light emitting layer in a diagonal direction. The first light emitting layer emits blue light, one of the second light emitting layer and the third light emitting layer emits red light, and the other emits green light. A light emitting region of the first light emitting layer is larger than light emitting regions of the second light emitting layer and the third light emitting layer.Type: GrantFiled: September 29, 2017Date of Patent: August 25, 2020Assignee: SHARP KABUSHIKI KAISHAInventor: Kohzoh Nakamura
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Publication number: 20200249532Abstract: A liquid crystal display panel performs displaying in the normally white mode. A first and a second polarizer are disposed so that the transmission axes thereof are perpendicular to each other. A liquid crystal layer is in a twisted alignment state in the absence of an applied voltage. A first substrate has a first electrode having a plurality of rectangular openings extending in parallel to each other, and a second electrode facing the first electrode with a dielectric layer interposed therebetween. The openings each independently have a width S of more than 0.6 ?m and not more than 1.4 ?m, and each pair of adjacent openings independently has a distance L therebetween of not less than 0.3 ?m and not more than 0.7 ?m. A first and a second horizontal alignment film each have an azimuthal anchoring energy of not more than 1×10?4J/m2.Type: ApplicationFiled: February 3, 2020Publication date: August 6, 2020Inventors: KOJI MURATA, KOHZOH NAKAMURA, KIYOSHI MINOURA, AKIRA SAKAI, YUICHI KAWAHIRA