Patents by Inventor Takahiro UEHARA
Takahiro UEHARA 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).
-
Patent number: 11949405Abstract: A double mode SAW (DMS) filter includes: a plurality of interdigital transducers (IDTs), each having a plurality of Type 1 electrode fingers and a plurality of Type 2 electrode fingers formed on a piezoelectric substrate, wherein one Type 2 electrode finger among the plurality of Type 2 electrode fingers is disposed between two adjacent Type 1 electrode fingers among the plurality of Type 1 electrode fingers, and in a first IDT and a second IDT included in the plurality of IDTs to be adjacent to each other, one Type 1 electrode finger of the second IDT is disposed between two Type 1 electrode fingers of the first IDT. Accordingly, it is possible to provide a DMS filter capable of improving the amount of attenuation in an attenuation band adjacent to the wide band side for the passband and miniaturizing a product by saving space.Type: GrantFiled: May 20, 2021Date of Patent: April 2, 2024Assignee: WISOL CO., LTD.Inventors: Kensei Uehara, Takahiro Sato
-
Publication number: 20210304472Abstract: A method of controlling a display device configured to display an image based on image information generated in accordance with a position of a pointing body includes the steps of monitoring a load value related to a load on a system which is configured to generate the image information in accordance with the position of the pointing body, performing a first mode configured to generate first image object information on which an editing process is performed, in accordance with the position of the pointing body, and then generate the image information using the first image object information when the load value is lower than a threshold value, and performing a second mode configured to generate second image object information in a format lower in the load on the system than a format of the first image object information in accordance with the position of the pointing body, and then generate the image information using the second image object information when the load value is equal to or higher than the threshoType: ApplicationFiled: March 24, 2021Publication date: September 30, 2021Inventors: Kyosuke ITAHANA, Takahiro UEHARA
-
Patent number: 10848145Abstract: A driver circuit which is supplied with a positive power supply voltage, a negative power supply voltage, and an input signal, and drives a switching element including a control terminal according to the input signal includes: a first output terminal connected to the control terminal via a first impedance circuit, and outputs the positive power supply voltage or the negative power supply voltage according to the input signal, to charge the control terminal and put the switching element into an ON state; a negative power supply terminal supplied with the negative power supply voltage; a negative voltage switch having a first end connected to the negative power supply terminal; a third output terminal connected to a second end of the negative voltage switch and to the control terminal via a second impedance circuit; and a first discharge switch disposed between the negative power supply terminal and the first output terminal.Type: GrantFiled: November 1, 2017Date of Patent: November 24, 2020Assignee: PANASONIC SEMICONDUCTOR SOLUTIONS CO., LTD.Inventors: Takuya Ishii, Yoshihito Kawakami, Takahiro Uehara, Ginga Katase
-
Patent number: 10483966Abstract: A switching circuit includes: a drive power supply; a first transistor and a second transistor; a drive signal source; and a drive circuit. Each of the first transistor and the second transistor includes: a drain electrode and a source electrode in which a main current flows when a corresponding one of the first transistor and the second transistor is ON; a first source terminal for passing the main current; and a second source terminal. Here, the first source terminal is connected to the source electrode at an impedance lower than an impedance of the second source terminal.Type: GrantFiled: December 19, 2018Date of Patent: November 19, 2019Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Takahiro Uehara, Takuya Ishii, Hiroyuki Handa, Atsushi Kitagawa, Takeshi Tanaka
-
Publication number: 20190149148Abstract: A switching circuit includes: a drive power supply; a first transistor and a second transistor; a drive signal source; and a drive circuit. Each of the first transistor and the second transistor includes: a drain electrode and a source electrode in which a main current flows when a corresponding one of the first transistor and the second transistor is ON; a first source terminal for passing the main current; and a second source terminal. Here, the first source terminal is connected to the source electrode at an impedance lower than an impedance of the second source terminal.Type: ApplicationFiled: December 19, 2018Publication date: May 16, 2019Inventors: Takahiro UEHARA, Takuya ISHII, Hiroyuki HANDA, Atsushi KITAGAWA, Takeshi TANAKA
-
Patent number: 10205449Abstract: A switching circuit includes: a drive power supply; a first transistor and a second transistor; a drive signal source; and a drive circuit. Each of the first transistor and the second transistor includes: a drain electrode and a source electrode in which a main current flows when a corresponding one of the first transistor and the second transistor is ON; a first source terminal for passing the main current; and a second source terminal. Here, the first source terminal is connected to the source electrode at an impedance lower than an impedance of the second source terminal.Type: GrantFiled: March 19, 2018Date of Patent: February 12, 2019Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Takahiro Uehara, Takuya Ishii, Hiroyuki Handa, Atsushi Kitagawa, Takeshi Tanaka
-
Publication number: 20180212509Abstract: A switching circuit includes: a drive power supply; a first transistor and a second transistor; a drive signal source; and a drive circuit. Each of the first transistor and the second transistor includes: a drain electrode and a source electrode in which a main current flows when a corresponding one of the first transistor and the second transistor is ON; a first source terminal for passing the main current; and a second source terminal. Here, the first source terminal is connected to the source electrode at an impedance lower than an impedance of the second source terminal.Type: ApplicationFiled: March 19, 2018Publication date: July 26, 2018Inventors: Takahiro UEHARA, Takuya ISHII, Hiroyuki HANDA, Atsushi KITAGAWA, Takeshi TANAKA
-
Publication number: 20180083610Abstract: A driver circuit which is supplied with a positive power supply voltage, a negative power supply voltage, and an input signal, and drives a switching element including a control terminal according to the input signal includes: a first output terminal connected to the control terminal via a first impedance circuit, and outputs the positive power supply voltage or the negative power supply voltage according to the input signal, to charge the control terminal and put the switching element into an ON state; a negative power supply terminal supplied with the negative power supply voltage; a negative voltage switch having a first end connected to the negative power supply terminal; a third output terminal connected to a second end of the negative voltage switch and to the control terminal via a second impedance circuit; and a first discharge switch disposed between the negative power supply terminal and the first output terminal.Type: ApplicationFiled: November 1, 2017Publication date: March 22, 2018Inventors: Takuya ISHII, Yoshihito KAWAKAMI, Takahiro UEHARA, Ginga KATASE
-
Patent number: 9354648Abstract: A constant-voltage circuit having an overcurrent protection circuit which includes: a first sense transistor, one main terminal connected to an input terminal of the constant-voltage circuit and a control terminal connected to a control terminal of an output transistor generates a current corresponding to an output current from the output transistor; a voltage level adjusting circuit configured to generate a voltage corresponding to a voltage of a main terminal of the output transistor at an output terminal side of the constant-voltage circuit by extracting a current that is not affected by a change in the output current from the output transistor, and adjust a voltage of another main terminal of the first sense transistor such that the adjusted voltage becomes equal to the generated voltage; and a protection circuit to control a control voltage applied from an error amplifier to the control terminal of the output transistor.Type: GrantFiled: March 4, 2014Date of Patent: May 31, 2016Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Hiroshi Yajima, Hideyuki Kihara, Takahiro Uehara
-
Publication number: 20140184182Abstract: A constant-voltage circuit having an overcurrent protection circuit which includes: a first sense transistor, one main terminal connected to an input terminal of the constant-voltage circuit and a control terminal connected to a control terminal of an output transistor generates a current corresponding to an output current from the output transistor; a voltage level adjusting circuit configured to generate a voltage corresponding to a voltage of a main terminal of the output transistor at an output terminal side of the constant-voltage circuit by extracting a current that is not affected by a change in the output current from the output transistor, and adjust a voltage of another main terminal of the first sense transistor such that the adjusted voltage becomes equal to the generated voltage; and a protection circuit to control a control voltage applied from an error amplifier to the control terminal of the output transistor.Type: ApplicationFiled: March 4, 2014Publication date: July 3, 2014Applicant: PANASONIC CORPORATIONInventors: Hiroshi YAJIMA, Hideyuki KIHARA, Takahiro UEHARA
-
Publication number: 20140184184Abstract: A voltage detecting circuit including: a first current source including a first terminal connected to a first voltage input terminal; a second current source including a first terminal connected to ground potential VSS; and a first transistor including a first main terminal connected to a second terminal of the first current source, a second main terminal connected to a second terminal of the second current source and a detection output terminal, and a control terminal connected to a second voltage terminal. The first and the second current sources are configured such that a logic level of a detection output signal is determined based on whether one voltage applied to the first voltage terminal is higher or lower than a voltage obtained by adding a voltage of a difference between the first main terminal and control terminal of the first transistor to the other voltage applied to the second voltage terminal.Type: ApplicationFiled: March 6, 2014Publication date: July 3, 2014Applicant: PANASONIC CORPORATIONInventors: Hiroshi YAJIMA, Hideyuki KIHARA, Takahiro UEHARA