Patents by Inventor Shinji Kawata
Shinji Kawata 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: 11922840Abstract: A liquid crystal display device includes a pixel array including a plurality of rows of gate lines, a plurality of columns of source lines, a plurality of switches, and a plurality of liquid crystal cells; a gate driver IC connected to the gate lines; a source driver IC connected to the source lines; a timing control IC arranged to control operation timings of the gate driver IC and the source driver IC; and a system power supply IC arranged to supply a power supply voltage to the source driver IC. Each of the timing control IC and the system power supply IC has a function of detecting an abnormality in the gate driver IC and an abnormality in the source driver IC.Type: GrantFiled: July 13, 2022Date of Patent: March 5, 2024Assignee: Rohm Co., Ltd.Inventors: Yasuhiro Tamano, Shinji Kawata, Yoko Nomaguchi
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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: 20220351655Abstract: A liquid crystal display device includes a pixel array including a plurality of rows of gate lines, a plurality of columns of source lines, a plurality of switches, and a plurality of liquid crystal cells; a gate driver IC connected to the gate lines; a source driver IC connected to the source lines; a timing control IC arranged to control operation timings of the gate driver IC and the source driver IC; and a system power supply IC arranged to supply a power supply voltage to the source driver IC. Each of the timing control IC and the system power supply IC has a function of detecting an abnormality in the gate driver IC and an abnormality in the source driver IC.Type: ApplicationFiled: July 13, 2022Publication date: November 3, 2022Inventors: Yasuhiro TAMANO, Shinji Kawata, Yoko NOMAGUCHI
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Patent number: 11475808Abstract: A liquid crystal display device includes a pixel array including a plurality of rows of gate lines, a plurality of columns of source lines, a plurality of switches, and a plurality of liquid crystal cells; a gate driver IC connected to the gate lines; a source driver IC connected to the source lines; a timing control IC arranged to control operation timings of the gate driver IC and the source driver IC; and a system power supply IC arranged to supply a power supply voltage to the source driver IC. Each of the timing control IC and the system power supply IC has a function of detecting an abnormality in the gate driver IC and an abnormality in the source driver IC.Type: GrantFiled: September 7, 2018Date of Patent: October 18, 2022Assignee: Rohm Co., Ltd.Inventors: Yasuhiro Tamano, Shinji Kawata, Yoko Nomaguchi
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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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Patent number: 11043045Abstract: A monitoring device includes a monitoring part configured to detect an abnormality of a monitoring target, a self-diagnosis part configured to diagnose whether or not the monitoring part operates normally during a period from a startup time point of a power supply to an elapse time point at which a reset release waiting time elapses, and a reset control part configured to release a reset of a reset output signal on or after the elapse time point.Type: GrantFiled: October 25, 2018Date of Patent: June 22, 2021Assignee: Rohm Co., Ltd.Inventors: Takayuki Matsuura, Shinji Kawata, Yoshiyuki Nakatani, Yuichi Kokusho
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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: 20200193882Abstract: A liquid crystal display device includes a pixel array including a plurality of rows of gate lines, a plurality of columns of source lines, a plurality of switches, and a plurality of liquid crystal cells; a gate driver IC connected to the gate lines; a source driver IC connected to the source lines; a timing control IC arranged to control operation timings of the gate driver IC and the source driver IC; and a system power supply IC arranged to supply a power supply voltage to the source driver IC. Each of the timing control IC and the system power supply IC has a function of detecting an abnormality in the gate driver IC and an abnormality in the source driver IC.Type: ApplicationFiled: September 7, 2018Publication date: June 18, 2020Applicant: Rohm Co., Ltd.Inventors: Yasuhiro TAMANO, Shinji Kawata, Yoko NOMAGUCHI
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Publication number: 20190130666Abstract: A monitoring device includes a monitoring part configured to detect an abnormality of a monitoring target, a self-diagnosis part configured to diagnose whether or not the monitoring part operates normally during a period from a startup time point of a power supply to an elapse time point at which a reset release waiting time elapses, and a reset control part configured to release a reset of a reset output signal on or after the elapse time point.Type: ApplicationFiled: October 25, 2018Publication date: May 2, 2019Applicant: Rohm Co., Ltd.Inventors: Takayuki Matsuura, Shinji Kawata, Yoshiyuki Nakatani, Yuichi Kokusho
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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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Patent number: 9997902Abstract: An overcurrent protection circuit includes a voltage monitoring part configured to monitor an output voltage generated from a periodic switching operation of a switching output stage or a feedback voltage corresponding to the output voltage, a current monitoring part configured to monitor whether a current flowing through the switching output stage is under an overcurrent condition, and a protection operation part configured to perform an overcurrent protection operation in response to monitoring results of both the voltage monitoring part and the current monitoring part.Type: GrantFiled: October 19, 2015Date of Patent: June 12, 2018Assignee: Rohm Co., Ltd.Inventors: Shinji Kawata, Keita Itohara
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Patent number: 9639108Abstract: A power supply circuit 1 includes an output circuit that generates an output voltage by performing a power supply operation based on an input voltage, an output terminal to which, after start-up of the power supply operation, the output voltage is applied, and a control circuit that causes a test current to flow between the output terminal and a ground. The control circuit detects, as a test voltage, a voltage at the output terminal in a test period in which the test current is caused to flow. When the test voltage at a predetermined judgment timing is lower than a judgment voltage, the control circuit judges that an output capacitor is connected and thus enables the power supply operation.Type: GrantFiled: April 17, 2014Date of Patent: May 2, 2017Assignee: Rohm Co., Ltd.Inventors: Kiminobu Sato, Shinji Kawata
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Publication number: 20160111868Abstract: An overcurrent protection circuit includes a voltage monitoring part configured to monitor an output voltage generated from a periodic switching operation of a switching output stage or a feedback voltage corresponding to the output voltage, a current monitoring part configured to monitor whether a current flowing through the switching output stage is under an overcurrent condition, and a protection operation part configured to perform an overcurrent protection operation in response to monitoring results of both the voltage monitoring part and the current monitoring part.Type: ApplicationFiled: October 19, 2015Publication date: April 21, 2016Inventors: Shinji Kawata, Keita ITOHARA
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Patent number: 9195250Abstract: A switching power supply device includes: a non-linear control type switching control unit that, in accordance with a result of a comparison between a feedback voltage and a reference voltage, performs on/off control of a switch element, and thereby generates an output voltage from an input voltage; a backflow current detection unit that, upon detecting a backflow current flowing to the switch element, forcibly switches off the switch element; and an on-time setting unit that sets an on-time of the switch element, in a case of the backflow current not being detected, in accordance with a duty of the switch element, and in a case of the backflow current being detected, in accordance with a switch voltage appearing at one end of the switch element or the output voltage.Type: GrantFiled: May 22, 2013Date of Patent: November 24, 2015Assignee: Rohm Co., Ltd.Inventors: Kazuhiro Murakami, Shinji Kawata
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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: 9166393Abstract: A driver circuit includes: a first transistor connected between a line of first voltage and an output terminal; a first overcurrent detector configured to output a first signal when overcurrent flows into the first transistor; a first control unit configured to turn on and off the first transistor at a predetermined period and turn off the first transistor when the first signal is output from the first overcurrent detector; and a counter configured to count the number of times by which the first signal is output from the first overcurrent detector within a predetermined time interval, and to output a shut-down signal to stop an operation of the driver circuit as a value of the count reaches a predetermined value of equal to or more than 2.Type: GrantFiled: July 10, 2013Date of Patent: October 20, 2015Assignee: Rohm Co., Ltd.Inventor: Shinji Kawata