405 patents
Page 18 of 21
Utility
Semiconductor Device for Switching Power Supply Control and Ac-dc Converter
22 Apr 20
Disclosed is a semiconductor device for switching power supply control including: a high voltage input starting terminal; a discharger; and an input state detection circuit that includes: a voltage divider; a peak hold circuit; a first comparator which detects generation of a plug removal state; a second comparator which detects generation of a brownout state; a timer circuit; and a control signal generation circuit which generates a signal to turn on the discharger or a signal to stop outputting of a switching control signal, Td1, Td2 and Td3 are set to have a relationship of Td1<Td2<Td3, Td1 being a delay time until the capacitor is discharged, Td2 being a delay time for determining the plug removal state, and Td3 being a delay time for determining the brownout state, and at least the delay time Td2 and the delay time Td3 are measured by a common timer circuit.
Hiroki MATSUDA, Satoshi ARIMA
Filed: 21 Oct 19
Utility
Semiconductor Device for Switching Power Supply Control and Ac-dc Converter
22 Apr 20
Disclosed is a semiconductor device for switching power supply control including: a power supply terminal; a current inflow terminal; a starting circuit; and a brownout detection circuit, wherein a control signal of a switching element is generated, the starting circuit includes: a first comparator; a starting control circuit which controls on and off of the switch; and an operation start circuit which detects that the voltage of the power supply terminal becomes equal to or more than a predetermined voltage, and generates a signal for operating an internal circuit, and the brownout detection circuit includes: a voltage divider; a second comparator which has a hysteresis characteristic for detecting generation of a brownout state; a timer circuit which measures a predetermined time during which the generation of the brownout state continues; and an output stop circuit which stops outputting of a switching control signal.
Hiroki MATSUDA, Satoshi ARIMA
Filed: 21 Oct 19
Utility
Rechargeable battery protection integrated circuit, rechargeable battery protection device, and battery pack
13 Apr 20
A battery protection circuit protects a rechargeable battery from overdischarge, by turning off a transistor inserted in series in a current path between a negative electrode of the battery and a negative terminal coupled to ground of a load or a charger.
Kohei Shibata
Filed: 29 Oct 19
Utility
Semiconductor Device for Switching Power Supply and Ac-dc Convertor
8 Apr 20
A semiconductor device for a switching power supply includes first and second external terminals, ON and OFF timing generation circuits, and a drive pulse generation circuit.
Hiroki MATSUDA, Satoshi ARIMA, Yukio MURATA
Filed: 1 Oct 19
Utility
Switching Power Supply Device and Method for Controlling the Same
8 Apr 20
A switching power supply device includes a voltage conversion transformer, a primary-side control semiconductor device, a rectification and smoothing circuit, an output voltage detection circuit, a failure detection circuit, and a switch.
Satoshi ARIMA, Hiroki MATSUDA
Filed: 1 Oct 19
Utility
Vibration actuator and portable device
6 Apr 20
A vibration actuator includes: a movable part including one of a coil or a magnet; a fixing part including the other one of the coil or the magnet; and an elastic supporting part supporting the movable part to the fixing part.
Yuki Takahashi, Kazutaka Sakaguchi, Yasutaka Kitamura, Shigeyuki Shimomura, Yuki Ogihara
Filed: 18 Nov 18
Utility
Vibration actuator and portable device
6 Apr 20
A vibration actuator includes: a movable part including a coil or a magnet; a fixing part including the other one of the coil or the magnet; and an elastic supporting part supporting the movable part such that the movable part is movable to the fixing part.
Yuki Takahashi, Kazutaka Sakaguchi, Yasutaka Kitamura, Shigeyuki Shimomura, Yuki Ogihara
Filed: 18 Nov 18
Utility
Vibration actuator and portable device
6 Apr 20
A vibration actuator includes: a movable part including a coil; a fixing part including a magnet; and an elastic supporting part supporting the movable part such that the movable part is movable to the fixing part.
Yuki Takahashi, Kazutaka Sakaguchi, Yasutaka Kitamura, Shigeyuki Shimomura, Yuki Ogihara
Filed: 18 Nov 18
Utility
Actuator, air pump, beauty treatment device, and laser scanning device
6 Apr 20
An actuator includes: a movable body including a single-pole magnetized single pole magnet; and a plurality of electromagnets each having a magnetic core portion and a coil portion for exciting the core portion.
Yuki Takahashi, Shigenori Inamoto
Filed: 22 Apr 15
Utility
Motor Control Circuit and Motor Controller
1 Apr 20
A motor control circuit includes a control circuit configured to output a pulse width modulation signal for controlling a switching operation of an inverter circuit, the inverter circuit being configured to supply an alternating current power to a motor, and includes a speed-change detecting circuit configured to detect a change in a speed command signal and, output, in response to the change meeting and exceeding a predetermined limit, a signal indicating that the speed command signal has changed to the control circuit to cause the control circuit to change a duty cycle of the pulse width modulation signal, the speed command signal specifying a target value of a rotational speed of the motor.
Makio ABE, Shu HAYASHI, Masato AOKI
Filed: 19 Sep 19
Utility
Motor Control Circuit and Motor Controller
1 Apr 20
A motor control circuit includes a control circuit configured to control a switching operation of an inverter circuit, the inverter circuit being configured to supply an alternating current power to a motor, and includes a determination-information generating circuit configured to generate at least one determination value that conveys information on whether the motor malfunctions or deteriorates.
Makio ABE, Takatoshi ITAGAKI, Shu HAYASHI, Masato AOKI
Filed: 19 Sep 19
Utility
Antenna Device and Method for Manufacturing Antenna Device
25 Mar 20
An antenna device mounted to an automobile includes an antenna component and an amplifier board provided with an amplifier to amplify signals received by the antenna component.
Ryutaro MIURA
Filed: 23 Sep 18
Utility
Motor Driving Circuit and Motor Driving Device
25 Mar 20
A motor driving circuit includes a wiring pattern formed in a circuit board, which is configured such that electrical current flowing into a motor flows through the wiring pattern; and a current measurement circuit configured to measure an amount of electrical current flowing through the wiring pattern, based on an amount of voltage drop occurring in response to flowing of the electrical current.
Hitoshi HAGIMORI, Itsuki NAKANO
Filed: 9 Sep 19
Utility
Secondary Battery Protection Circuit
18 Mar 20
A secondary battery protection circuit for a secondary battery includes: a reference voltage circuit configured to generate a reference voltage by using a depletion-type transistor and a transistor unit of enhancement type connected in series with the depletion-type transistor; a voltage divider configured to output a detection voltage obtained by dividing a power source voltage of the secondary battery; a detection circuit configured to detect an abnormal state of the secondary battery based on the reference voltage and the detection voltage; a first adjustment circuit configured to adjust a size ratio of the depletion-type transistor to the transistor unit based on threshold voltages of the depletion-type transistor and the transistor unit; and a second adjustment circuit configured to adjust the detection voltage based on the reference voltage after adjusting the size ratio.
Daichi YAMASHITA, Norihito KAWAGUCHI, Yoshihiro SATAKE, Nobuhito TANAKA, Koji KOSHIMIZU
Filed: 11 Jul 19
Utility
Battery control circuit for multiple cells employing level shift circuits to avoid fault
16 Mar 20
A battery control circuit that is used for a battery protecting apparatus configured to protect a secondary battery in which cells are connected in series includes: a level shift circuit configured to shift respective levels of cell voltages of the cells to generate level shift voltages; a maximum voltage output circuit including differential amplifier circuits for the respective level shift voltages, the respective differential amplifier circuits being configured to compare the corresponding level shift voltages with threshold voltages to generate output voltages, the maximum voltage output circuit being configured to simultaneously compare the output voltages to output a maximum voltage corresponding to a cell voltage whose voltage value is highest; an overcharge detecting circuit configured to detect overcharging of the secondary battery based on the maximum voltage; and a maximum voltage cell specifying circuit configured to specify, based on the output voltages, a cell whose voltage value is highest.
Kohei Shibata
Filed: 28 Aug 17
Utility
Lens drive device, camera module, and camera-equipped device
16 Mar 20
A lens drive device has a support section for supporting a shake correction movable section relative to a shake correction stationary section.
Masayoshi Sugawara, Koki Hiwatashi
Filed: 22 Mar 16
Utility
Rechargeable Battery Protection Circuit, Rechargeable Battery Protection Device, Battery Pack, and Method of Controlling Rechargeable Battery Protection Circuit
4 Mar 20
A rechargeable battery protection circuit protects a rechargeable battery, using two NMOS transistors inserted in series in a current path between a battery cathode and a positive terminal connected to load or power terminal of a charger.
Takashi TAKEDA
Filed: 27 Jun 19
Utility
Retinal scan display device for correcting distortion of and inverting image
2 Mar 20
The present display device is a retinal scan display device including: a projection optical system configured to project an image to a retina of an eye; a distortion correcting unit configured to correct a distortion of the image; an image inverting unit configured to invert the image; and a storage unit configured to store correction data for correcting the distortion of the image when the image is projected to a left eye and correction data for correcting the distortion of the image when the image is projected to a right eye, wherein, based on a switching signal that represents that a side at which the projection optical system is arranged has been switched from one eye side to the other eye side, the distortion correcting unit performs distortion correction, by switching from correction data corresponding to one eye to correction data corresponding to the other eye, and the image inverting unit performs image inversion.
Misato Abe, Kimiyuki Ohba, Mitsuru Sugawara, Makoto Suzuki
Filed: 25 Sep 16
Utility
Rechargeable Battery Protection Integrated Circuit, Rechargeable Battery Protection Device, and Battery Pack
26 Feb 20
A battery protection circuit protects a rechargeable battery from overdischarge, by turning off a transistor inserted in series in a current path between a negative electrode of the battery and a negative terminal coupled to ground of a load or a charger.
Kohei SHIBATA
Filed: 29 Oct 19
Utility
Lens driving device, camera module, and camera-mounted device
24 Feb 20
A lens driving device includes an auto-focusing driving part that includes an auto-focusing coil and driving magnets, and an optical image stabilization driving part that includes an optical image stabilization coil disposed so as to be spaced apart from the driving magnets in an optical-axis direction and the driving magnets.
Tomohiko Osaka, Atsushi Kikuchi, Minoru Katagiri
Filed: 4 Feb 19