Patents by Inventor Minoru Tamada
Minoru Tamada 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: 12054419Abstract: A cover glass includes: a glass substrate having a convex and concave shape formed on at least one of surfaces thereof by an antiglare treatment; and an antireflection film disposed on the surface of the glass substrate, the surface having the convex and concave shape. In the cover glass, a difference ?a* in a* value between any two points within a surface of the cover glass on the side where the antireflection film is present and a difference ?b* in b* value between any two points within the surface of the cover glass on the side where the antireflection film is present satisfy the following expression: ?{(?a*)2+(?b*)2}?4.Type: GrantFiled: June 1, 2021Date of Patent: August 6, 2024Assignee: AGC Inc.Inventors: Kensuke Fujii, Shinji Kobune, Minoru Tamada, Hitoshi Mishiro
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Patent number: 11866365Abstract: The present invention relates to a cover glass for a display, which is a glass plate having a first main surface and a second main surface. The cover glass contains, as represented by mol percentage based on oxides, from 50 to 75% of SiO2, from 5 to 20% of Al2O3, from 2 to 20% of Na2O, from 0 to 6% of K2O, from 0 to 15% of MgO, from 0 to 10% of a total amount (CaO+SrO+BaO) of CaO, SrO and BaO, from 0 to 5% of a total amount (ZrO2+TiO2) of ZrO2 and TiO2, from 0 to 10% of B2O3, and from 0 to 20% of Li2O. The cover glass has a ream minimum distance of 100 mm or more and 1,000 mm or less, and a ream period of 1 mm or more and 30 mm or less.Type: GrantFiled: January 8, 2021Date of Patent: January 9, 2024Assignee: AGC Inc.Inventors: Kazutaka Otsuka, Kyushiro Igarashi, Takeshi Shimizu, Minoru Tamada
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Patent number: 11644706Abstract: The present invention relates to a glass plate which is provided with a first main surface, and a second main surface which faces the first main surface. An antiglare portion and a non-antiglare portion are provided to the first main surface. The average lengths (RSm) of elements of roughness curves of the antiglare portion and the non-antiglare portion are respectively 1 ?m or higher. The difference between the RSm of the antiglare portion and the RSm of the non-antiglare portion is 100 ?m or lower.Type: GrantFiled: December 18, 2019Date of Patent: May 9, 2023Assignee: AGC INC.Inventors: Hitoshi Mishiro, Takehiko Nose, Minoru Tamada, Yohei Kawai, Naoya Wada
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Patent number: 11590844Abstract: A glass substrate includes a pair of main surfaces including a first main surface and a second main surface opposed to the first main surface; an edge surface arranged along a direction orthogonal to the pair of main surfaces; and a connecting surface arranged between the first main surface and the edge surface. The connecting surface has a plurality of pores. A difference between a 50% particle diameter of the pores in a portion 20 ?m distant from the first main surface and a 50% particle diameter in a portion 20 ?m distant from the edge surface is 10 ?m or less.Type: GrantFiled: May 14, 2020Date of Patent: February 28, 2023Assignee: AGC Inc.Inventors: Minoru Tamada, Yasuhiro Inoue
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Patent number: 11339087Abstract: An antiglare glass substrate includes a glass substrate having a first main surface and a second main surface that is opposite to the first main surface. The first main surface has undergone an antiglare treatment and a fluorine-containing organosilicon compound coating film as an antifouling film is laminated thereon. The first main surface partly includes a non-antiglare-treated portion that has not undergone the antiglare treatment. The non-antiglare-treated portion has a surface roughness Ra of less than 10 nm. A difference in height along a plate thickness direction of the glass substrate between the antiglare-treated portion that has undergone the antiglare treatment and the non-antiglare-treated portion is 10 ?m or larger and 200 ?m or less.Type: GrantFiled: January 5, 2021Date of Patent: May 24, 2022Assignee: AGC INC.Inventors: Hitoshi Mishiro, Keiko Koyama, Minoru Tamada
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Patent number: 11267750Abstract: The present invention relates to a translucent structure having a surface unevenness shape which has: an area ratio of surface flat regions in which an angle formed with a flat surface is in a range of 0° to 0.5° of in a range of 0% to 5.8%; a projection density of in a range of 0.0001/?m2 to 0.05/?m2; a projection area ratio of in a range of 5.5% to 50%; a skewness Ssk which represents the degree of non-symmetry of in a range of ?0.5 to 1.1; a load area factor Smr1 at a boundary between a projected mountain portion and a core portion of in a range of 0% to 14.5%; and an arithmetic average surface roughness Sa of in a range of 0.06 ?m to 0.143 ?m.Type: GrantFiled: February 19, 2019Date of Patent: March 8, 2022Assignee: AGC INC.Inventors: Masanobu Isshiki, Toru Ikeda, Takaaki Murakami, Yosuke Takeda, Minoru Tamada
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Publication number: 20210293995Abstract: A cover glass includes a glass substrate and an antireflection film disposed on at least one of main surfaces of the glass substrate, and the at least one of main surfaces of the glass substrate has one or more cracks formed therein, the crack(s) each having a length of 5 ?m or less, and a difference ?a* in a* value between any two points within a surface of the cover glass on the side where the antireflection film has been disposed and a difference ?b* in b* value between any two points within the surface of the cover glass on the side where the antireflection film has been disposed satisfy the following expression: ?{(?a*)2+(?b*)2}?4.Type: ApplicationFiled: June 1, 2021Publication date: September 23, 2021Applicant: AGC Inc.Inventors: Kensuke FUJII, Shinji KOBUNE, Minoru TAMADA, Hitoshi MISHIRO
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Publication number: 20210284571Abstract: A cover glass includes: a glass substrate having a convex and concave shape formed on at least one of surfaces thereof by an antiglare treatment; and an antireflection film disposed on the surface of the glass substrate, the surface having the convex and concave shape. In the cover glass, a difference ?a* in a* value between any two points within a surface of the cover glass on the side where the antireflection film is present and a difference ?b* in b*value between any two points within the surface of the cover glass on the side where the antireflection film is present satisfy the following expression: ?{(?a*)2+(?b*)2}?4.Type: ApplicationFiled: June 1, 2021Publication date: September 16, 2021Applicant: AGC Inc.Inventors: Kensuke FUJII, Shinji KOBUNE, Minoru TAMADA, Hitoshi MISHIRO
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Publication number: 20210214268Abstract: The present invention relates to a cover glass for a display, which is a glass plate having a first main surface and a second main surface. The cover glass contains, as represented by mol percentage based on oxides, from 50 to 75% of SiO2, from 5 to 20% of Al2O3, from 2 to 20% of Na2O, from 0 to 6% of K2O, from 0 to 15% of MgO, from 0 to 10% of a total amount (CaO+SrO+BaO) of CaO, SrO and BaO, from 0 to 5% of a total amount (ZrO2+TiO2) of ZrO2 and TiO2, from 0 to 10% of B2O3, and from 0 to 20% of Li2O. The cover glass has a ream minimum distance of 100 mm or more and 1,000 mm or less, and a ream period of 1 mm or more and 30 mm or less.Type: ApplicationFiled: January 8, 2021Publication date: July 15, 2021Applicant: AGC Inc.Inventors: Kazutaka OTSUKA, Kyushiro IGARASHI, Takeshi SHIMIZU, Minoru TAMADA
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Publication number: 20210122672Abstract: An antiglare glass substrate includes a glass substrate having a first main surface and a second main surface that is opposite to the first main surface. The first main surface has undergone an antiglare treatment and a fluorine-containing organosilicon compound coating film as an antifouling film is laminated thereon. The first main surface partly includes a non-antiglare-treated portion that has not undergone the antiglare treatment. The non-antiglare-treated portion has a surface roughness Ra of less than 10 nm.Type: ApplicationFiled: January 5, 2021Publication date: April 29, 2021Applicant: AGC Inc.Inventors: Hitoshi MISHIRO, Keiko KOYAMA, Minoru TAMADA
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Patent number: 10981827Abstract: An antiglare glass substrate includes a glass substrate having a first main surface and a second main surface that is opposite to the first main surface. The first main surface has undergone an antiglare treatment and a fluorine-containing organosilicon compound coating film as an antifouling film is laminated thereon. The first main surface partly includes a non-antiglare-treated portion that has not undergone the antiglare treatment. The non-antiglare-treated portion has a surface roughness Ra of less than 10 nm. A difference in height along a plate thickness direction of the glass substrate between the antiglare-treated portion that has undergone the antiglare treatment and the non-antiglare-treated portion is 10 ?m or larger and 200 ?m or less.Type: GrantFiled: March 23, 2018Date of Patent: April 20, 2021Assignee: AGC INC.Inventors: Hitoshi Mishiro, Keiko Koyama, Minoru Tamada
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Publication number: 20200361315Abstract: A glass substrate includes a pair of main surfaces including a first main surface and a second main surface opposed to the first main surface; an edge surface arranged along a direction orthogonal to the pair of main surfaces; and a connecting surface arranged between the first main surface and the edge surface. The connecting surface has a plurality of pores. A difference between a 50% particle diameter of the pores in a portion 20 ?m distant from the first main surface and a 50% particle diameter in a portion 20 ?m distant from the edge surface is 10 ?m or less.Type: ApplicationFiled: May 14, 2020Publication date: November 19, 2020Applicant: AGC Inc.Inventors: Minoru TAMADA, Yasuhiro INOUE
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Patent number: 10816840Abstract: The present invention relates to a glass plate including a first main surface subjected to antiglare treatment, and a second main surface opposed to the first main surface, in which a clarity index value T, a reflection image diffusiveness index value R and an anti-sparkle index value S satisfy respective relations of: clarity index value T?0.8; reflection image diffusiveness index value R?0.01; and anti-sparkle index value S?0.85; and a transmission haze measured by a method according to JIS K 7136 (2000) being 15% or less. The glass plate of the present invention is excellent in clarity, reflection image diffusiveness and anti-sparkle, and also excellent in reproducibility of color.Type: GrantFiled: January 18, 2019Date of Patent: October 27, 2020Assignee: AGC Inc.Inventors: Minoru Tamada, Yusuke Kobayashi
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Publication number: 20200124908Abstract: The present invention relates to a glass plate which is provided with a first main surface, and a second main surface which faces the first main surface. An antiglare portion and a non-antiglare portion are provided to the first main surface. The average lengths (RSm) of elements of roughness curves of the antiglare portion and the non-antiglare portion are respectively 1 ?m or higher. The difference between the RSm of the antiglare portion and the RSm of the non-antiglare portion is 100 ?m or lower.Type: ApplicationFiled: December 18, 2019Publication date: April 23, 2020Applicant: AGC INC.Inventors: Hitoshi Mishiro, Takehiko Nose, Minoru Tamada, Yohei Kawai, Naoya Wada
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Publication number: 20190256410Abstract: The present invention relates to a translucent structure having a surface unevenness shape which has: an area ratio of surface flat regions in which an angle formed with a flat surface is in a range of 0° to 0.5° of in a range of 0% to 5.8%; a projection density of in a range of 0.0001/?m2 to 0.05/?m2; a projection area ratio of in a range of 5.5% to 50%; a skewness Ssk which represents the degree of non-symmetry of in a range of ?0.5 to 1.1; a load area factor Smr1 at a boundary between a projected mountain portion and a core portion of in a range of 0% to 14.5%; and an arithmetic average surface roughness Sa of in a range of 0.06 ?m to 0.143 ?m.Type: ApplicationFiled: February 19, 2019Publication date: August 22, 2019Applicant: AGC INC.Inventors: Masanobu ISSHIKI, Toru Ikeda, Takaaki Murakami, Yosuke Takeda, Minoru Tamada
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Publication number: 20190235304Abstract: The present invention relates to a glass plate including a first main surface subjected to antiglare treatment, and a second main surface opposed to the first main surface, in which a clarity index value T, a reflection image diffusiveness index value R and an anti-sparkle index value S satisfy respective relations of: clarity index value T?0.8; reflection image diffusiveness index value R?0.01; and anti-sparkle index value S?0.85; and a transmission haze measured by a method according to JIS K 7136 (2000) being 15% or less. The glass plate of the present invention is excellent in clarity, reflection image diffusiveness and anti-sparkle, and also excellent in reproducibility of color.Type: ApplicationFiled: January 18, 2019Publication date: August 1, 2019Applicant: AGC Inc.Inventors: Minoru Tamada, Yusuke Kobayashi
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Patent number: 10310142Abstract: There is provided an optical device including a display device, and a transparent substrate that is disposed on a side of a display surface of the display device. When the transparent substrate is evaluated by using a three index values of a resolution index value T, a reflection image diffusiveness index value R, and a sparkle index value S, the following conditions are satisfied: the resolution index value T?0.2, the reflection image diffusiveness index value R?0.2, and the sparkle index value S?60.Type: GrantFiled: July 14, 2015Date of Patent: June 4, 2019Assignee: AGC Inc.Inventors: Minoru Tamada, Yusuke Kobayashi, Tomonobu Senoo
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Publication number: 20180339939Abstract: A glass article includes a glass plate including a rugged surface configured to diffuse and reflect an external light formed on at least one of main surfaces; and a functional film formed on the rugged surface. A transmission haze of the glass article is 28% or less. On a surface of the functional film opposite to the glass plate, within a region with a visual field area of 60000 ?m2 observed by using a laser microscope, a pore representative diameter is less than 12 ?m. An area ratio of a surface area A (?m2) of the surface of the functional film within the region to the visual field area (A/60000) is 1.02 or more and 1.07 or less.Type: ApplicationFiled: April 24, 2018Publication date: November 29, 2018Applicant: Asahi Glass Company, LimitedInventors: Kyohei Hashimoto, Tomohiro Takano, Hitoshi Mishiro, Minoru Tamada
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Publication number: 20180273425Abstract: An antiglare glass substrate includes a glass substrate having a first main surface and a second main surface that is opposite to the first main surface. The first main surface has undergone an antiglare treatment and a fluorine-containing organosilicon compound coating film as an antifouling film is laminated thereon. The first main surface partly includes a non-antiglare-treated portion that has not undergone the antiglare treatment. The non-antiglare-treated portion has a surface roughness Ra of less than 10 nm. A difference in height along a plate thickness direction of the glass substrate between the antiglare-treated portion that has undergone the antiglare treatment and the non-antiglare-treated portion is 10 ?m or larger and 200 ?m or less.Type: ApplicationFiled: March 23, 2018Publication date: September 27, 2018Applicant: ASAHI GLASS COMPANY, LIMITEDInventors: Hitoshi MISHIRO, Keiko KOYAMA, Minoru TAMADA
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Publication number: 20170184762Abstract: A cover glass includes a glass substrate and an antireflection film disposed on at least one of main surfaces of the glass substrate, and the at least one of main surfaces of the glass substrate has one or more cracks formed therein, the crack(s) each having a length of 5 ?m or less, and a difference ?a* in a* value between any two points within a surface of the cover glass on the side where the antireflection film has been disposed and a difference ?b* in b* value between any two points within the surface of the cover glass on the side where the antireflection film has been disposed satisfy the following expression: ?{(?a*)2+(?b*)2}?4.Type: ApplicationFiled: December 21, 2016Publication date: June 29, 2017Applicant: ASAHI GLASS COMPANY, LIMITEDInventors: Kensuke FUJII, Shinji KOBUNE, Minoru TAMADA, Hitoshi MISHIRO