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公开(公告)号：US20190234773A1
公开(公告)日：2019-08-01
申请号：US16337722
申请日：2017-08-15
Applicant: KOA CORPORATION
Inventor： Tomokazu IKENO
Abstract: To provide an image display device configured to more faithfully display a projection image on a region where a physical quantity change has occurred. An image display device of the present invention includes a flow rate sensor and a screen on which an image from a projector is projected, and a control is performed such that the image is projected on the screen so as to include a position of the flow rate sensor that has detected the physical quantity change, and the image changes corresponding to a measured value change of the flow rate sensor. Preferably, a plurality of the physical quantity detection units are disposed, and the control is performed such that the image changes corresponding to the measured value changes in the respective physical quantity detection units.
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公开(公告)号：US20190170556A1
公开(公告)日：2019-06-06
申请号：US16095836
申请日：2017-02-27
Applicant: KOA CORPORATION
Inventor： Tomokazu IKENO
Abstract: To provide a flow sensor having improved responsiveness compared to the prior art, the flow sensor of the present invention includes an insulation board, a flow-rate detection resistance element, and a temperature compensation resistance element. Each of the flow-rate detection resistance element and the temperature compensation resistance element is arranged on the insulation board such that a terminal temperature of the temperature compensation resistance element approaches a terminal temperature of the flow-rate detection resistance element. Accordingly, responsiveness can be improved.
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公开(公告)号：US10224132B2
公开(公告)日：2019-03-05
申请号：US15126199
申请日：2015-03-11
Applicant: KOA Corporation
Inventor： Kentaro Matsumoto
Abstract: A chip resistor including an insulating film covering a resistor making contact with a pair of electrodes formed on an upper surface of an insulating substrate and a method for manufacturing same are provided. Both electrodes include a main electrode layer that contains silver as a main metal component an 10 weight % or more of palladium as another metal component, and an auxiliary electrode layer lower in specific resistance than the main electrode layer, a laminate part where the auxiliary electrode layer and the main electrode layer are laminated in order on a single surface of the insulating substrate; and an exposed part of the auxiliary electrode layer where a part of the auxiliary electrode layer is not covered with the main electrode layer on a far side from the resistor, and part that extend from a near side to the far side with respect to the resistor.
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公开(公告)号：US10163553B2
公开(公告)日：2018-12-25
申请号：US15736123
申请日：2016-06-08
Applicant: KOA CORPORATION
Inventor： Kenji Kameko , Kosuke Arai , Tadahiko Yoshioka
Abstract: Provided is a resistor including a first electrode, a second electrode, and a resistive element disposed between the first and second electrodes. Each of the first and second electrodes includes a main electrode portion and a narrow electrode portion with a narrower width than that of the main electrode portion. The resistive element is disposed between the two narrow electrode portions.
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公开(公告)号：US10161968B2
公开(公告)日：2018-12-25
申请号：US15113606
申请日：2015-01-30
Applicant: KOA CORPORATION
Inventor： Keishi Nakamura , Kenji Kameko
Abstract: To provide a shunt resistor and a current detection device including the shunt resistor, to which a busbar, a board, and the like can be easily fixed with sufficient strength wherein only minimum processing of electrodes is required. Screwing members (bolt (14) and nut (15)) that are separate members from electrodes (12) of the resistor (10), are fixed on the electrodes (12). The current detection device includes the shunt resistor (10), which has at least a pair of electrodes (12). One screwing member (14) fixed beforehand on at least one electrode (12) is screw fastened with the other screwing member (15) while disposing a prescribed intervening member (20) between the one screwing member and the other screwing member. Here, the prescribed intervening member (20) includes a board mounting a current detection circuit thereon and/or busbars.
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Patent Agency Ranking
公开(公告)号：US20180335348A1
公开(公告)日：2018-11-22
申请号：US15979830
申请日：2018-05-15
Applicant: KOA Corporation
Inventor： Katsuya MIURA , Masahiro SHIMODAIRA
Abstract: A resistance pattern that contains platinum as a main component is formed into a meander shape and on a main surface of a ceramic substrate. A protective film layer that covers the resistance pattern has a two-layer structure including a trap layer as an inner layer and an overcoat layer as an outer layer. The trap layer contains alumina as a main component and 2 to 30 vol % of platinum. The overcoat layer contains alumina as a main component. With such a configuration, even when reactivity of the platinum resistance pattern becomes higher under high temperature use, platinum contained in the trap layer reacts with oxygen or impurities etc. contained in the ceramic substrate. Thus, reaction of the platinum resistance pattern can be suppressed.
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公开(公告)号：US20180283919A1
公开(公告)日：2018-10-04
申请号：US15765051
申请日：2016-09-30
Applicant: KOA CORPORATION
Inventor： Tomokazu IKENO
Abstract: Provided is a flow sensor capable of suppressing deterioration in responsiveness and sensitivity to a flow of fluid even if chip resistors that are disposed on an insulating substrate are used as a heating resistor and a temperature compensating resistor. A flow sensor includes a signal processing part that processes signals from a heating resistor and a temperature compensating resistor. The heating resistor is a chip resistor disposed on a front surface of an insulating substrate made of resin, and the temperature compensating resistor is a back surface of the insulating substrate. The temperature compensating resistor is disposed on a heat radiation path of the heating resistor via the insulating substrate. The insulating substrate has reduced opportunities of contact between the temperature compensating resistor and wind than opportunities of contact between the heating resistor and the fluid.
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公开(公告)号：US20180188295A1
公开(公告)日：2018-07-05
申请号：US15739022
申请日：2016-06-14
Applicant: KOA CORPORATION
Inventor： Kenji KAMEKO , Kosuke ARAI
IPC: G01R19/00
Abstract: Provided is a current sensing device including an electrical conductor made of electrically conductive metal; and voltage sensing terminals provided on the electrical conductor. Each voltage sensing terminal is formed by inserting bar-like metal into a through-hole formed in the electrical conductor, and the voltage sensing terminal includes a first terminal portion that is stored in the through-hole and a second terminal portion that protrudes from the through-hole.
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公开(公告)号：US20180090247A1
公开(公告)日：2018-03-29
申请号：US15562046
申请日：2016-03-08
Applicant: KOA Corporation
Inventor： Kentaro MATSUMOTO , Kotaro KASHIWAGI
CPC classification number: H01C1/148 , H01C1/012 , H01C7/003 , H01C17/006 , H01C17/065 , H01C17/22 , H01C17/281
Abstract: In order to provide a chip resistor which has wide and flat terminal electrodes in its front surface and which has high connection reliability between front electrodes and the terminal electrodes, a chip resistor according to the present invention includes: an insulating substrate 1 shaped like a cuboid; a pair of front electrodes 2 provided on lengthwise opposite edge portions of a front surface of the insulating substrate 1; a resistor body 3 provided between the front electrodes 2; an insulating protection layer 4 covering entire surfaces of the front electrodes 2 and the resistor body 3; and a pair of terminal electrodes 5 provided on lengthwise opposite end surfaces of the insulating substrate 1. The chip resistor is configured such that the front electrodes 2 sandwiched between the insulating substrate 1 and the protection layer 4 are exposed from widthwise end surfaces and the lengthwise end surfaces of the insulating substrate 1, and the terminal electrodes 5 wrap around the widthwise opposite end surfaces of the insulating substrate 1 to be thereby connected to the exposed portions of the front electrodes 2.
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公开(公告)号：US20170301439A1
公开(公告)日：2017-10-19
申请号：US15516025
申请日：2015-07-22
Applicant: KOA Corporation
Inventor： Naoto OKA , Homare SASAKI
IPC: H01C17/242 , H01C17/00 , B23K26/351
CPC classification number: H01C17/242 , B23K26/351 , H01C17/006
Abstract: The invention is to provide a resistor trimming method capable of adjusting a resistance value with ultrahigh precision and having excellent production efficiency. To achieve the object, a start point (S1) at a distance from a resistor (4) is irradiated with laser light while probes are brought into contact with a pair of surface electrodes (3) to measure a resistance value of the resistor (4). The place irradiated with the laser light is scanned so that a first trimming groove (5) extending in a direction perpendicular to a current direction can be formed in the resistor (4). Then, the place irradiated with the laser light is returned by a predetermined amount from an end point (first turning point (T1)) of the first trimming groove (5) to be set as a second turning point (T2). With the second turning point (T2) as a start point, scanning and cutting is performed to forma second trimming groove (6). Thus, the resistance value of the resistor (4) is adjusted to a target resistance value with high precision.
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