Patents by Inventor Yoichi Kajiwara
Yoichi Kajiwara 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: 20240088786Abstract: A driving device includes an output terminal to output a first control signal, and input terminals configured to be connected respectively with a corresponding terminal of light emitting elements driven by a voltage generated based on the first control signal. A constant-current driver is connected to each of the input terminals, and a control portion is configured to generate a pulse signal based on a signal which is input from the input terminals. An open detection portion is connected with each of the input terminals and configured to determine a connection state of the light emitting elements based on a signal that is input into the input terminals. A current set terminal is configured to be connected to a first resistor, and an over voltage protection circuit is configured to be coupled to a potential between a second resistor and a third resistor.Type: ApplicationFiled: November 20, 2023Publication date: March 14, 2024Inventors: Shinji Kawata, Yoichi Kajiwara
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Patent number: 11863068Abstract: A driving device comprises a first transistor (B13), a second transistor (B14), and a resistance element. The first transistor (B13) has one terminal receiving a pulsed current and a control terminal connected to the one terminal. The second transistor (B14) has one terminal connected to at least one load, the other terminal connected to a reference potential together with the other terminal of the first transistor (B13), and a control terminal connected to the control terminal of the first transistor (B13). The resistance element is connected between the control terminal of the first transistor (B13) and the other terminal of the first transistor (B13).Type: GrantFiled: August 24, 2021Date of Patent: January 2, 2024Assignee: Rohm Co., Ltd.Inventors: Shinji Kawata, Yoichi Kajiwara
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Publication number: 20210391789Abstract: A driving device comprises a first transistor (B13), a second transistor (B14), and a resistance element. The first transistor (B13) has one terminal receiving a pulsed current and a control terminal connected to the one terminal. The second transistor (B14) has one terminal connected to at least one load, the other terminal connected to a reference potential together with the other terminal of the first transistor (B13), and a control terminal connected to the control terminal of the first transistor (B13). The resistance element is connected between the control terminal of the first transistor (B13) and the other terminal of the first transistor (B13).Type: ApplicationFiled: August 24, 2021Publication date: December 16, 2021Inventors: Shinji Kawata, Yoichi Kajiwara
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Patent number: 11133744Abstract: A driving device comprises a first transistor (B13), a second transistor (B14), and a resistance element. The first transistor (B13) has one terminal receiving a pulsed current and a control terminal connected to the one terminal. The second transistor (B14) has one terminal connected to at least one load, the other terminal connected to a reference potential together with the other terminal of the first transistor (B13), and a control terminal connected to the control terminal of the first transistor (B13). The resistance element is connected between the control terminal of the first transistor (B13) and the other terminal of the first transistor (B13).Type: GrantFiled: January 22, 2021Date of Patent: September 28, 2021Assignee: Rohm Co., Ltd.Inventors: Shinji Kawata, Yoichi Kajiwara
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Publication number: 20210152085Abstract: A driving device comprises a first transistor (B13), a second transistor (B14), and a resistance element. The first transistor (B13) has one terminal receiving a pulsed current and a control terminal connected to the one terminal. The second transistor (B14) has one terminal connected to at least one load, the other terminal connected to a reference potential together with the other terminal of the first transistor (B13), and a control terminal connected to the control terminal of the first transistor (B13). The resistance element is connected between the control terminal of the first transistor (B13) and the other terminal of the first transistor (B13).Type: ApplicationFiled: January 22, 2021Publication date: May 20, 2021Inventors: Shinji Kawata, Yoichi Kajiwara
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Patent number: 10938303Abstract: A driving device comprises a first transistor (B13), a second transistor (B14), and a resistance element. The first transistor (B13) has one terminal receiving a pulsed current and a control terminal connected to the one terminal. The second transistor (B14) has one terminal connected to at least one load, the other terminal connected to a reference potential together with the other terminal of the first transistor (B13), and a control terminal connected to the control terminal of the first transistor (B13). The resistance element is connected between the control terminal of the first transistor (B13) and the other terminal of the first transistor (B13).Type: GrantFiled: November 9, 2018Date of Patent: March 2, 2021Assignee: Rohm Co., Ltd.Inventors: Shinji Kawata, Yoichi Kajiwara
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Publication number: 20190097533Abstract: A driving device comprises a first transistor (B13), a second transistor (B14), and a resistance element. The first transistor (B13) has one terminal receiving a pulsed current and a control terminal connected to the one terminal. The second transistor (B14) has one terminal connected to at least one load, the other terminal connected to a reference potential together with the other terminal of the first transistor (B13), and a control terminal connected to the control terminal of the first transistor (B13). The resistance element is connected between the control terminal of the first transistor (B13) and the other terminal of the first transistor (B13).Type: ApplicationFiled: November 9, 2018Publication date: March 28, 2019Inventors: Shinji Kawata, Yoichi Kajiwara
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Patent number: 10170983Abstract: A driving device comprises a first transistor (B13), a second transistor (B14), and a resistance element. The first transistor (B13) has one terminal receiving a pulsed current and a control terminal connected to the one terminal. The second transistor (B14) has one terminal connected to at least one load, the other terminal connected to a reference potential together with the other terminal of the first transistor (B13), and a control terminal connected to the control terminal of the first transistor (B13). The resistance element is connected between the control terminal of the first transistor (B13) and the other terminal of the first transistor (B13).Type: GrantFiled: July 6, 2015Date of Patent: January 1, 2019Assignee: Rohm Co., Ltd.Inventors: Shinji Kawata, Yoichi Kajiwara
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Publication number: 20150311790Abstract: A driving device comprises a first transistor (B13), a second transistor (B14), and a resistance element. The first transistor (B13) has one terminal receiving a pulsed current and a control terminal connected to the one terminal. The second transistor (B14) has one terminal connected to at least one load, the other terminal connected to a reference potential together with the other terminal of the first transistor (B13), and a control terminal connected to the control terminal of the first transistor (B13). The resistance element is connected between the control terminal of the first transistor (B13) and the other terminal of the first transistor (B13).Type: ApplicationFiled: July 6, 2015Publication date: October 29, 2015Inventors: Shinji Kawata, Yoichi Kajiwara
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Patent number: 9104215Abstract: A driving device comprises a first transistor (B13), a second transistor (B14), and a resistance element. The first transistor (B13) has one terminal receiving a pulsed current and a control terminal connected to the one terminal. The second transistor (B14) has one terminal connected to at least one load, the other terminal connected to a reference potential together with the other terminal of the first transistor (B13), and a control terminal connected to the control terminal of the first transistor (B13). The resistance element is connected between the control terminal of the first transistor (B13) and the other terminal of the first transistor (B13).Type: GrantFiled: July 2, 2014Date of Patent: August 11, 2015Assignee: Rohm Co., Ltd.Inventors: Shinji Kawata, Yoichi Kajiwara
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Publication number: 20140333280Abstract: A driving device comprises a first transistor (B13), a second transistor (B14), and a resistance element. The first transistor (B13) has one terminal receiving a pulsed current and a control terminal connected to the one terminal. The second transistor (B14) has one terminal connected to at least one load, the other terminal connected to a reference potential together with the other terminal of the first transistor (B13), and a control terminal connected to the control terminal of the first transistor (B13). The resistance element is connected between the control terminal of the first transistor (B13) and the other terminal of the first transistor (B13).Type: ApplicationFiled: July 2, 2014Publication date: November 13, 2014Inventors: Shinji Kawata, Yoichi Kajiwara
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Patent number: 8796956Abstract: A driving device comprises a first transistor (B13), a second transistor (B14), and a resistance element. The first transistor (B13) has one terminal receiving a pulsed current and a control terminal connected to the one terminal. The second transistor (B14) has one terminal connected to at least one load, the other terminal connected to a reference potential together with the other terminal of the first transistor (B13), and a control terminal connected to the control terminal of the first transistor (B13). The resistance element is connected between the control terminal of the first transistor (B13) and the other terminal of the first transistor (B13).Type: GrantFiled: September 17, 2013Date of Patent: August 5, 2014Assignee: Rohm Co., Ltd.Inventors: Shinji Kawata, Yoichi Kajiwara
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Publication number: 20140015433Abstract: A driving device comprises a first transistor (B13), a second transistor (B14), and a resistance element. The first transistor (B13) has one terminal receiving a pulsed current and a control terminal connected to the one terminal. The second transistor (B14) has one terminal connected to at least one load, the other terminal connected to a reference potential together with the other terminal of the first transistor (B13), and a control terminal connected to the control terminal of the first transistor (B13). The resistance element is connected between the control terminal of the first transistor (B13) and the other terminal of the first transistor (B13).Type: ApplicationFiled: September 17, 2013Publication date: January 16, 2014Applicant: Rohm Co., Ltd.Inventors: Shinji Kawata, Yoichi Kajiwara
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Patent number: 8558479Abstract: A driving device comprises a first transistor (B13), a second transistor (B14), and a resistance element. The first transistor (B13) has one terminal receiving a pulsed current and a control terminal connected to the one terminal. The second transistor (B14) has one terminal connected to at least one load, the other terminal connected to a reference potential together with the other terminal of the first transistor (B13), and a control terminal connected to the control terminal of the first transistor (B13). The resistance element is connected between the control terminal of the first transistor (B13) and the other terminal of the first transistor (B13).Type: GrantFiled: August 20, 2012Date of Patent: October 15, 2013Assignee: Rohm Co., Ltd.Inventors: Shinji Kawata, Yoichi Kajiwara
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Publication number: 20130069554Abstract: A driving device comprises a first transistor (B13), a second transistor (B14), and a resistance element. The first transistor (B13) has one terminal receiving a pulsed current and a control terminal connected to the one terminal. The second transistor (B14) has one terminal connected to at least one load, the other terminal connected to a reference potential together with the other terminal of the first transistor (B13), and a control terminal connected to the control terminal of the first transistor (B13). The resistance element is connected between the control terminal of the first transistor (B13) and the other terminal of the first transistor (B13).Type: ApplicationFiled: August 20, 2012Publication date: March 21, 2013Applicant: ROHM CO., LTD.Inventors: Shinji Kawata, Yoichi Kajiwara
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Patent number: 8269425Abstract: A driving device comprises a first transistor (B13), a second transistor (B14), and a resistance element. The first transistor (B13) has one terminal receiving a pulsed current and a control terminal connected to the one terminal. The second transistor (B14) has one terminal connected to at least one load, the other terminal connected to a reference potential together with the other terminal of the first transistor (B13), and a control terminal connected to the control terminal of the first transistor (B13). The resistance element is connected between the control terminal of the first transistor (B13) and the other terminal of the first transistor (B13).Type: GrantFiled: August 8, 2008Date of Patent: September 18, 2012Assignee: Rohm Co., Ltd.Inventors: Shinji Kawata, Yoichi Kajiwara
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Publication number: 20100201283Abstract: A driving device comprises a first transistor (B13), a second transistor (B14), and a resistance element. The first transistor (B13) has one terminal receiving a pulsed current and a control terminal connected to the one terminal. The second transistor (B14) has one terminal connected to at least one load, the other terminal connected to a reference potential together with the other terminal of the first transistor (B13), and a control terminal connected to the control terminal of the first transistor (B13). The resistance element is connected between the control terminal of the first transistor (B13) and the other terminal of the first transistor (B13).Type: ApplicationFiled: August 8, 2008Publication date: August 12, 2010Applicant: Rohm Co., Ltd.Inventors: Shinji Kawata, Yoichi Kajiwara
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Publication number: 20070064370Abstract: A semiconductor integrated circuit device of the present invention is provided with: first and second external terminals, each of which receives a corresponding one of two different potentials applied thereto; first and second switches that are connected in series between the first and second external terminals and connected together at a node from which an output signal is extracted; a heat generation detector portion for detecting a monitored temperature; and a drive circuit for performing on/off control of the first and second switches. When the monitored temperature reaches a first threshold temperature, both the first and second switches are turned off, and, when the monitored temperature reaches a second threshold temperature that is higher than the first threshold temperature, the first and second external terminals are short-circuited so as to operate an overcurrent protection element connected externally.Type: ApplicationFiled: September 14, 2006Publication date: March 22, 2007Inventor: Yoichi Kajiwara