Patents by Inventor Takumi ISHIWATA
Takumi ISHIWATA 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: 11934901Abstract: A tag indicating an attribute of the tag by an electromagnetic wave reflection characteristic, the tag including a substrate (11), and a conductor pattern layer (12) formed on the substrate (11) and having first and second slots (13a) and (13b) disposed adjacent to each other, in which the first slot (13a) constitutes a first resonance element (13Qa) having a resonance frequency at a first frequency, the second slot (13b) constitutes a second resonance element (13Qb) having a resonance frequency at a second frequency higher than the first frequency, and when irradiation with the electromagnetic waves is performed, a Q value of a resonance peak appearing at the first frequency is higher than a Q value of a resonance peak appearing at the first frequency when the first slot (13a) alone constitutes a resonance structure of the tag.Type: GrantFiled: August 21, 2020Date of Patent: March 19, 2024Assignee: Konica Minolta, Inc.Inventors: Takumi Ishiwata, Nobuaki Takahashi, Kenji Arai, Takeshi Hakii
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Patent number: 11803714Abstract: This learning device is provided with: a simulation execution unit that, by using electromagnetic field analysis simulation, determines a reflected wave spectrum obtained when electromagnetic waves are emitted from a reader to an identification target; and a machine learning unit that, by using training data in which the reflected wave spectrum calculated by the simulation execution unit and an attribute thereof are defined as a set, performs a training process on a learning model by machine learning. The simulation execution unit generates a plurality of the reflected wave spectra belonging to the same attribute by variously changing various parameters related to the identification target from reference parameters. The machine learning unit performs a training process on the learning model by machine learning by using, as training data, the plurality of reflected wave spectra obtained for each attribute.Type: GrantFiled: April 2, 2021Date of Patent: October 31, 2023Assignee: KONICA MINOLTA, INC.Inventors: Ippei Enokida, Takumi Ishiwata, Takeshi Hakii
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Publication number: 20230196039Abstract: This learning device is provided with: a simulation execution unit that, by using electromagnetic field analysis simulation, determines a reflected wave spectrum obtained when electromagnetic waves are emitted from a reader to an identification target; and a machine learning unit that, by using training data in which the reflected wave spectrum calculated by the simulation execution unit and an attribute thereof are defined as a set, performs a training process on a learning model by machine learning. The simulation execution unit generates a plurality of the reflected wave spectra belonging to the same attribute by variously changing various parameters related to the identification target from reference parameters. The machine learning unit performs a training process on the learning model by machine learning by using, as training data, the plurality of reflected wave spectra obtained for each attribute.Type: ApplicationFiled: April 2, 2021Publication date: June 22, 2023Inventors: Ippei ENOKIDA, Takumi ISHIWATA, Takeshi HAKII
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Patent number: 11630963Abstract: A detecting system includes: a sensor (10) that includes an antenna unit (11) formed with a metal pattern, and a back surface reflector (13) that faces the antenna unit (11) via an isolation layer (12); and a reader (20) that transmits electromagnetic waves (Fa) to the sensor (10), receives reflected waves (Fr) from the sensor (10), and compares the reflection characteristics of the sensor (10) detected from the reflected waves (Fr) with the reflection characteristics of the sensor (10) stored in advance, to detect a state change in the sensor (10).Type: GrantFiled: October 30, 2019Date of Patent: April 18, 2023Assignee: Konica Minolta, Inc.Inventors: Saburou Hiraoka, Nobuaki Takahashi, Takumi Ishiwata
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Publication number: 20230009003Abstract: A chipless RFID tag can be scanned with high accuracy and robustness. A tag reader includes: a processing part configured to output information calculated from an emergent wave having an incident wave, as a radio wave irradiated to a tag (an object to be identified) emerged by way of the tag; and a determining part configured to identify attributes of the tag, using the information.Type: ApplicationFiled: August 26, 2020Publication date: January 12, 2023Inventors: Takumi ISHIWATA, Ippei ENOKIDA, Takeshi HAKII
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Patent number: 11487984Abstract: A contactlessly readable tag includes a metal pattern layer, a conductive layer, and at least one intermediate layer. The intermediate layer has a relative permittivity of 0 or more and 2.5 or less and is provided between the metal pattern layer and the conductive layer. The metal pattern layer includes a metal part whose arrangement pattern corresponds to identification information. The identification information is configured to be identified based on information on an electromagnetic wave that is reflected by the contactlessly readable tag in response to irradiation of the contactlessly readable tag with an electromagnetic wave. The metal pattern layer is provided closer to a reading surface of the contactlessly readable tag than at least one of the intermediate layer.Type: GrantFiled: June 5, 2019Date of Patent: November 1, 2022Assignee: Konica Minolta, Inc.Inventors: Makoto Mochizuki, Takumi Ishiwata
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Publication number: 20220284256Abstract: A tag indicating an attribute of the tag by an electromagnetic wave reflection characteristic, the tag including a substrate (11), and a conductor pattern layer (12) formed on the substrate (11) and having first and second slots (13a) and (13b) disposed adjacent to each other, in which the first slot (13a) constitutes a first resonance element (13Qa) having a resonance frequency at a first frequency, the second slot (13b) constitutes a second resonance element (13Qb) having a resonance frequency at a second frequency higher than the first frequency, and when irradiation with the electromagnetic waves is performed, a Q value of a resonance peak appearing at the first frequency is higher than a Q value of a resonance peak appearing at the first frequency when the first slot (13a) alone constitutes a resonance structure of the tag.Type: ApplicationFiled: August 21, 2020Publication date: September 8, 2022Inventors: TAKUMI ISHIWATA, NOBUAKI TAKAHASHI, KENJI ARAI, TAKESHI HAKII
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Patent number: 11209360Abstract: A color tone quantification device for a glossy color, in which the correlation with the color tone of the glossy color visually perceived by humans is further enhanced, is provided. The device comprises a coefficient calculation unit that calculates a coefficient calculated in consideration of a spatial distribution which is to be used to correct the chromaticity measured by a method including a specular reflection component obtained by measuring the reflection light obtained by reflection of measurement light to an area of an object; a chromaticity calculation unit that calculates an effective chromaticity obtained by weighting the chromaticity measured by the method including the specular reflection component with the coefficient calculated by the coefficient calculation unit; and an output unit that outputs the effective chromaticity as a stimulus value representing a glossy color of the area in a color space.Type: GrantFiled: March 15, 2019Date of Patent: December 28, 2021Assignee: Konica Minolta, Inc.Inventors: Takumi Ishiwata, Kishio Tamura
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Publication number: 20210390274Abstract: A detecting system includes: a sensor (10) that includes an antenna unit (11) formed with a metal pattern, and a back surface reflector (13) that faces the antenna unit (11) via an isolation layer (12); and a reader (20) that transmits electromagnetic waves (Fa) to the sensor (10), receives reflected waves (Fr) from the sensor (10), and compares the reflection characteristics of the sensor (10) detected from the reflected waves (Fr) with the reflection characteristics of the sensor (10) stored in advance, to detect a state change in the sensor (10).Type: ApplicationFiled: October 30, 2019Publication date: December 16, 2021Inventors: Saburou HIRAOKA, Nobuaki TAKAHASHI, Takumi ISHIWATA
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Publication number: 20210216843Abstract: The present invention provides a contactlessly readable tag with which both a small tag size and long-distance readability can be achieved, a method for manufacturing the contactlessly readable tag, an identification device, and an identification information determination system. In this tag 200, the arrangement pattern of metal parts in a metal pattern layer 202 of this tag 200 is associated with identification information, and when irradiating the tag 200 with electromagnetic waves, the identification information can be read on the basis of the information of the electromagnetic waves reflected by the tag 200, and the metal pattern layer 202 is provided closer to a reading surface side of the tag 200 than a buffer layer 201 having at least a single layer.Type: ApplicationFiled: June 5, 2019Publication date: July 15, 2021Applicant: Konica Minolta, Inc.Inventors: Makoto MOCHIZUKI, Takumi ISHIWATA
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Publication number: 20210055216Abstract: The objective of the present invention is to provide a device for calculating a gloss value using a gloss value calculating method having an enhanced correlation with an impression of gloss sensed visually by a person. The present invention for achieving this objective relates to a gloss value calculating device. The gloss value calculating device comprises: a peak calculating unit which uses distribution information of brightness or reflection intensity with respect to a light reception angle obtained by measuring reflected light resulting from the reflection of measuring light radiated at an object, to obtain the peak height and spread of the brightness or the reflection intensity in the distribution information; and a gloss value calculating unit which calculates a gloss value represented by a ratio of the peak height to the peak spread.Type: ApplicationFiled: March 15, 2019Publication date: February 25, 2021Applicant: Konica Minolta, Inc.Inventors: Takumi ISHIWATA, Kishio TAMURA
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Publication number: 20200400565Abstract: A color tone quantification device for a glossy color, in which the correlation with the color tone of the glossy color visually perceived by humans is further enhanced, is provided. The device comprises a coefficient calculation unit that calculates a coefficient calculated in consideration of a spatial distribution which is to be used to correct the chromaticity measured by a method including a specular reflection component obtained by measuring the reflection light obtained by reflection of measurement light to an area of an object; a chromaticity calculation unit that calculates an effective chromaticity obtained by weighting the chromaticity measured by the method including the specular reflection component with the coefficient calculated by the coefficient calculation unit; and an output unit that outputs the effective chromaticity as a stimulus value representing a glossy color of the area in a color space.Type: ApplicationFiled: March 15, 2019Publication date: December 24, 2020Applicant: Konica Minolta, Inc.Inventors: Takumi ISHIWATA, Kishio TAMURA