Periodic Switch In The Primary Circuit Of The Supply Transformer Patents (Class 315/219)
  • Patent number: 11503689
    Abstract: A circuit protection apparatus (100) is used to protect an LED drive circuit (200), and the circuit protection apparatus (100) includes a first switch unit (1) and a snubber circuit (3). The first switch unit (1) provides an electrical connection between an input terminal (100A) and the LED drive circuit (200) according to the normality of an input current (Iin) flowing through the input terminal (100A). The snubber circuit (3) provides a first delay time period (Td1) according to an input power (Vin). The snubber circuit (3) provides a start signal (Ss) to the LED drive circuit (200) according to the end of the first delay time period (Td1), and controls a first ground point (G1) of the snubber circuit (3) to be coupled to a second ground point (G2) of the LED drive circuit (200).
    Type: Grant
    Filed: December 10, 2021
    Date of Patent: November 15, 2022
    Inventors: Cheng-Jen Lee, Yen-Lin Chen, Chun-Hung Lu
  • Patent number: 11490475
    Abstract: A dimmable ballast circuit for a compact fluorescent lamp controls the intensity of a lamp tube in response to a phase-control voltage received from a dimmer switch. The ballast circuit comprises a phase-control-to-DC converter circuit that receives the phase-control voltage, which is characterized by a duty cycle defining a target intensity of the lamp tube, and generates a DC voltage representative of the duty cycle of the phase-control voltage. Changes in the duty cycle of the phase-control voltage that are below a threshold amount are filtered out by the converter circuit, while intentional changes in the duty cycle of the phase-control voltage are reflected in changes in the target intensity level and thereby the intensity level of the lamp tube.
    Type: Grant
    Filed: October 9, 2020
    Date of Patent: November 1, 2022
    Assignee: Lutron Technology Company LLC
    Inventor: Donald F. Hausman, Jr.
  • Patent number: 11452185
    Abstract: The lighting apparatus includes a LED module, a constant current source, a bridge rectifier, a silicon-controlled rectifier, a wireless module and a detector. The lighting apparatus receives an alternating current power to generate a light. The constant current source provides a driving current to the LED module. The bridge rectifier converts the alternating current power of a first frequency to a direct current power with a second frequency. The second frequency is two times of the first frequency. The silicon-controlled rectifier is connected to the alternating current power and the bridge rectifier for adjusting the direct current power with a chopping signal. The wireless module receives an external control signal. The detector generates a dimming control signal supplied to the constant current source to adjust the driving current according to both the external control signal and the chopping signal.
    Type: Grant
    Filed: March 25, 2021
    Date of Patent: September 20, 2022
    Inventors: Wei Liu, Qiqiang Lin, Yibin Chen, Fujie Chen
  • Patent number: 11375589
    Abstract: To reduce the time until the start of the lighting while suppressing the overshoot of the current. A method to carry out lighting control of a semiconductor light emitting element using a lighting control device where the lighting control device includes a switching element serially connected to the semiconductor light emitting element and having a control terminal to control a conductive state, and a control circuit to control the control terminal. The method including: increasing a control voltage of the control terminal of the switching element from an initial value to a first value in a relatively short time by the control circuit; and increasing the control voltage of the control terminal of the switching element from the first value to a second value in a relatively long time by the control circuit.
    Type: Grant
    Filed: October 27, 2020
    Date of Patent: June 28, 2022
    Inventor: Keizo Sekido
  • Patent number: 11297702
    Abstract: A dimmer interface circuit includes a buffer stage circuit and a PWM control circuit. The buffer stage circuit converts a dimming input signal to a dimming buffer signal. The buffer stage circuit includes: a power rail generation circuit, which generates a power rail according to the dimming input signal adaptively, so that the dimming input signal is between a high level voltage and a low level voltage of the power rail; and an amplification circuit, which receives the dimming input signal, to generate the dimming buffer signal. The power rail supplies electrical power to the amplification circuit, wherein the amplification circuit operates within a range between the high level voltage and the low level voltage. The PWM control circuit converts the dimming buffer signal to a PWM dimming signal, so as to adjust a brightness of an LED module.
    Type: Grant
    Filed: September 30, 2020
    Date of Patent: April 5, 2022
    Inventors: Yu-Wen Chang, Leng-Nien Hsiu, Isaac Y. Chen
  • Patent number: 11272603
    Abstract: A lighting relay panel may include lower-cost features or components related to improved safety and reliability. In some cases, the relay panel includes a power supply capable of protecting the panel from high-voltage and high-current transients. A microcontroller may determine a power interruption based on a zero-cross signal received from the power supply, and may also configure latching relays during the interruption. In some implementations, the relay panel includes a relay sense circuit that is capable of receiving actuation signals from multiple relays connected to different phases of a power signal, and the microcontroller may synchronize or repeat the actuations based on a signal from the relay sense circuit. The microcontroller may generate relay addresses based on the relay positions within the relay panel. In some cases, the relay panel may include isolation circuits that are capable of providing an isolated control signal having an improved voltage range.
    Type: Grant
    Filed: December 20, 2019
    Date of Patent: March 8, 2022
    Assignee: ABL IP Holding LLC
    Inventors: Dalibor Zulim, Richard Lee Westrick, Jr., Ryan Zaveruha, Frank Pelliccio
  • Patent number: 11211215
    Abstract: The present disclosure provides a high voltage and high current switch with zero-phase waiting and a control method. The switch includes two or more switching units connected in series, each of the switch unit modules includes a main switch circuit, an auxiliary switch circuit, a voltage-equalizing power supply circuit unit, a switch control and communication circuit unit, and a current transformer; and the auxiliary switch circuit and the voltage-equalizing power supply circuit unit are connected in parallel between two ends of the main switch circuit, and the current transformer is connected to the main switch circuit; an output of the current transformer is connected to the voltage-equalizing power supply circuit unit which supplies power to the switch control and communication circuit unit, and the switch control and communication circuit unit is configured to control the closing and opening of a main relay and an auxiliary relay.
    Type: Grant
    Filed: February 2, 2018
    Date of Patent: December 28, 2021
    Assignee: Gyrk International Technology Co., Ltd.
    Inventor: Hai Wang
  • Patent number: 11193909
    Abstract: A photoionization detector is disclosed. The photoionization detector comprises a detector electrode that outputs a signal, an ultraviolet lamp, a lamp driver communicatively coupled to the ultraviolet lamp and configured to turn the ultraviolet lamp on and off in response to a control input, and a controller that is communicatively coupled to the output signal of the detector electrode and to the control input of the lamp driver, that outputs an indication of gas detection based on the output signal of the detector electrode, and that turns the lamp driver on and off with an on duty cycle of less than 10%.
    Type: Grant
    Filed: August 9, 2016
    Date of Patent: December 7, 2021
    Assignee: Honeywell International Inc.
    Inventors: Peter Hsi, Wei Yeh, Dan Zhang, Yuhui Xu, Kui Lu
  • Patent number: 11165277
    Abstract: An uninterruptible power system comprising an input unit, a battery, a first voltage conversion unit, a second voltage conversion unit, an output unit and a control circuit is provided. The control circuit is configured to control the operations of the input unit, the first voltage conversion unit, the second voltage conversion unit and the output unit, and to determine whether to derate the rated output power of the uninterruptible power system according to a first setting command, wherein the first setting command is used to indicate whether the uninterruptible power system is electrically connected to AC power source through a power cord. In addition, an operation method corresponding to the uninterruptible power system is also provided.
    Type: Grant
    Filed: November 6, 2019
    Date of Patent: November 2, 2021
    Inventors: Lien-Hsun Ho, Zi-Wei Lin, Chao-Ching Yang
  • Patent number: 11153961
    Abstract: A system for plasma ignition and maintenance of an atmospheric pressure plasma. The system has a variable frequency alternating current (AC) power source, a transformer, a cable connected to a secondary winding of the transformer, a programmed microprocessor for control of power to the atmospheric pressure plasma. The microprocessor is configured to a) at pre-ignition, power the AC power source at an operational frequency fop higher than the resonant frequency fr, b) decrease the operational frequency fop of the AC power source until there is plasma ignition, and c) after the plasma ignition, further decrease the operational frequency fop of the AC power source to a frequency lower than the resonant frequency fr.
    Type: Grant
    Filed: October 30, 2020
    Date of Patent: October 19, 2021
    Assignee: Atmospheric Plasma Solutions, Inc.
    Inventor: Terrence E. Rogers
  • Patent number: 11005356
    Abstract: A power control device for controlling driving of an LLC resonant converter including a first switching element to one end of which an input voltage is applied, a second switching element of which one end is connected to the other end of the first switching element, and a primary winding and a resonant capacitor connected in series between a first connection node at which the first and second switching elements are connected together and the other end of the second switching element includes an on-timing controller that detects variation of a switching voltage detection signal based on a switching voltage appearing at the first connection node rising up to the input voltage and falling down to 0 V and that, based on the result of the detection, generates a high-side on-signal for turning on the first switching element and a low-side on-signal for turning on the second switching element.
    Type: Grant
    Filed: November 5, 2019
    Date of Patent: May 11, 2021
    Assignee: Rohm Co., Ltd.
    Inventors: Hiroki Kikuchi, Hiroyuki Hatano
  • Patent number: 10999906
    Abstract: A self-adaptive illuminating device includes an illuminating unit, a sampling module, a sampling transformation module, a control module and a power transformation module. The sampling module samples at least one electrical property of the illuminating unit to generate a first feedback signal in response to a test signal. The sampling transformation module filters out noises off the first feedback signal for generating a second feedback signal. The control module generates an operation signal that carries at least one operational parameter of the illuminating unit in response to the second feedback signal. The power transformation module generates a drive voltage corresponding to an input voltage and the operation signal. The power transformation module drives the illuminating unit using the drive voltage.
    Type: Grant
    Filed: March 18, 2020
    Date of Patent: May 4, 2021
    Inventors: Tian Lan, Jianxin Xie, Liping Lin
  • Patent number: 10848599
    Abstract: A data transmission method includes: establishing, by a server, a connection with a client according to a transmission control protocol (TCP) through a gateway with a synchronous proxy mechanism; acquiring, by the server, sequence number conversion information and converting a first TCP sequence number of a first data packet to be sent to the client according to the sequence number conversion information, so that the first TCP sequence number is matched, by the server, with a first acknowledgment number of the second data packet sent by the client; and sending, by the server, the first data packet, for which the first TCP sequence number has been converted, to the client directly. A server, a gateway, and a computer-readable medium are also disclosed.
    Type: Grant
    Filed: September 12, 2018
    Date of Patent: November 24, 2020
    Inventors: Jian Zhang, Jiaoren Wu, Hao Jiang, Ning Liu, Yongxin Cui
  • Patent number: 10805997
    Abstract: Light output from an LED light source is increased or reduced in response to adjustment of a triac-based dimmer having a triac holding current to maintain conduction of the dimmer. An LED controller to control the light output includes a voltage-controlled impedance to provide an adaptive holding current that causes a triac current of the dimmer to be greater than the triac holding current, particularly when the dimmer is adjusted for significantly low light output (e.g., less than 5%, 2%, or 1% of full power light output). The adaptive holding current also allows for smooth increase of the light output starting from low light output, without perceivable flicker or shimmer. In one example, the voltage-controlled impedance is a resistive-like impedance that is placed on a secondary side of a transformer providing power to the LED light source. In another example, the voltage-controlled impedance is not pulse width modulated.
    Type: Grant
    Filed: April 6, 2020
    Date of Patent: October 13, 2020
    Assignee: DMF, Inc.
    Inventor: Jie Dong Wang
  • Patent number: 10727664
    Abstract: The present disclosure provides a temperature protection circuit for a power converter, including a plurality of temperature protection branches, each of the temperature protection branches comprises a resistor, a voltage source, a temperature switch, and an isolation transformer, and each of the temperature protection branches corresponds to one of the power semiconductor switch blocks, and a first end of the resistor of each of the temperature protection branches is coupled to an output electrode of the power semiconductor switch block, and a second end of the resistor is coupled to a first end of the voltage source and coupled to a first end of the contact of the temperature switch via a primary winding of the isolation transformer, a second end of the voltage source and a second end of the contact of the temperature switch are respectively coupled to the potential midpoint of the power converter.
    Type: Grant
    Filed: May 13, 2019
    Date of Patent: July 28, 2020
    Assignee: Delta Electronics, Inc.
    Inventors: Teng Liu, Yong Zeng, Jianping Ying, Ming Wang, Xiaobo Huang, Jun Liu
  • Patent number: 10706791
    Abstract: A backlight brightness control method and a backlight brightness control device are provided. The backlight brightness control method includes: acquiring a luminous brightness value of a display panel; determining a relationship between the luminous brightness value and a preset brightness value by a brightness control circuit; transmitting an adjusted current value to a backlight driver module according to the relationship by the brightness control circuit; and generating a current having the adjusted current value by the backlight driver module to drive a backlight module in the display panel to emit light.
    Type: Grant
    Filed: December 20, 2017
    Date of Patent: July 7, 2020
    Inventors: Xinshe Yin, Masakazu Okamura
  • Patent number: 10652965
    Abstract: An apparatus can include: a light-emitting diode (LED) drive circuit having a silicon-controlled rectifier dimmer; and a bus voltage adjustment circuit configured to adjust a direct current bus voltage to delay a turn-on time instant of the silicon-controlled rectifier dimmer when a conduction angle signal is greater than an angle threshold.
    Type: Grant
    Filed: December 7, 2018
    Date of Patent: May 12, 2020
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Jianxin Wang, Huiqiang Chen
  • Patent number: 10652962
    Abstract: Various embodiments include apparatuses and methods enabling a dim-to-warm circuit operation of an LED multi-colored array. In one example, an apparatus includes a hybrid driving-circuit coupled to the LED array and to a single control-device to receive an indication of a luminous flux desired from the LED array. A color temperature for the LED array is determined based on the desired luminous flux of the LED array. In various embodiments, the hybrid driving-circuit includes an analog current-division circuit to produce current for at least two LED current-driving sources and a multiplexer array coupled between the analog current-division circuit and the LED to provide periodically, for a predetermined amount of time, current from at least one of the at least two LED current-driving sources to at least two colors of the LED array. Other apparatuses and methods are described.
    Type: Grant
    Filed: June 27, 2019
    Date of Patent: May 12, 2020
    Assignee: Lumileds LLC
    Inventor: Yifeng Qiu
  • Patent number: 10624172
    Abstract: A short protecting circuit for a LED (Light-emitting Diode) driver for powering a plurality of LED strings, having: a short comparing circuit, configured to provide a plurality of short fault indicating signals; a first logic circuit, configured to provide a short fault signal based on the plurality of short fault indicating signals to indicate a short fault condition; a timing circuit, configured to provide a short protecting enable signal; and a second logic circuit, configured to provide a plurality of short isolating signals; wherein the short isolating signals are blocked when an open fault signal is valid.
    Type: Grant
    Filed: September 27, 2019
    Date of Patent: April 14, 2020
    Assignee: Chengdu Monolithic Power Systems Co., Ltd.
    Inventors: Bo Yu, Junxin Tan, Taofeng Li, Shufa Jiang, Li Yang
  • Patent number: 10602601
    Abstract: A creeping discharge element drive device of an embodiment includes a switching element, a current detector, a zero-cross detection circuit, a storage, and a controller. The current detector detects alternating currents flowing through the switching element. The zero-cross point detection circuit detects a zero-cross point of the alternating currents. The storage stores a first threshold value of a resonant period. The controller drives the switching element to apply a test voltage to the creeping discharge element, determines a resonant period of the alternating currents from the detected zero-cross points of the alternating currents, and restricts or stops the driving of the switching element in response to the resonant period exceeding the first threshold value.
    Type: Grant
    Filed: February 8, 2019
    Date of Patent: March 24, 2020
    Inventors: Motofumi Tanaka, Toshiki Osako, Hiroki Murayama, Naoto Shinohara, Hiroyuki Yasui
  • Patent number: 10581320
    Abstract: A direct filtering type switching power supply is provided, for an occasion including pulsating direct current, including a filter circuit, a main power stage and an indicating circuit. A direct current input is connected to the filter circuit through the indicating circuit. The filter circuit and the main power stage are connected in parallel. The indicating circuit is formed by connecting a light emitting unit with an inductor in parallel, and make sure that the direction of the direct current input passing through the inductor is opposite to the conducting direction of the light emitting unit. The filter circuit at least includes an electrolytic capacitor. When the electrolytic capacitor is normal, an excitation current of a switching transistor in the main power stage basically does not appear in the inductor, and an LED in the light emitting unit does not emit light.
    Type: Grant
    Filed: August 24, 2016
    Date of Patent: March 3, 2020
    Inventor: Baojun Wang
  • Patent number: 10542612
    Abstract: A device (1) for providing an amount of power to a gas discharge lamp (2) comprises a control circuit (3) for controlling a supply circuit (4) for supplying the power according to a power versus voltage graph (10). A calculator (30) calculates a boundary voltage value as a function of a measured voltage value of a voltage signal that has been measured after a predefined time-interval from a cold start of the gas discharge lamp (2). A more accurate boundary voltage value results in more stability and in less time required to reach a steady state. The calculator (30) may be arranged for calculating the boundary voltage value as a function of a minimum voltage value of the voltage signal and of a steady state voltage value of the voltage signal. A memory (31) may store voltage values of the voltage signal and a processor (32) may update these voltage values.
    Type: Grant
    Filed: November 3, 2009
    Date of Patent: January 21, 2020
    Assignee: LUMILEDS LLC
    Inventors: Anatoli Saveliev, Sven Probst
  • Patent number: 10542597
    Abstract: A lighting control circuit (10) for controlling a plurality of LEDs (24, 26). The lighting control circuit (10) includes a current source (12) coupleable to a first LED (20) and a second LED (22); a first switch (24) configured to switch from an open position to a closed position when driven by a first drive signal (V3), wherein the first switch (24) is positioned to interrupt current flow (Iout) through the first LED (20) when the first switch (24) is in the open position; a second switch (26) configured to switch from an open position to a closed position when driven by a second drive signal (V4), the second drive signal (V4) being temporally non-overlapping with respect to the first drive signal (V3), wherein the second switch (26) is positioned to interrupt current flow (Iout) through the second LED (22) when the second switch (30) is in the open position.
    Type: Grant
    Filed: September 2, 2016
    Date of Patent: January 21, 2020
    Assignee: SIGNIFY HOLDING B.V.
    Inventor: Poh Ng
  • Patent number: 10440798
    Abstract: The present invention provides an LED lamp and a temperature control circuit applied to the LED lamp. The LED lamp includes at least one LED unit, a magnetic ballast, and an LED drive circuit. The magnetic ballast is coupled to a power and configured to limit and stabilize a received alternating current. The LED drive circuit includes a temperature control circuit. The temperature control circuit is coupled to the magnetic ballast and connected in parallel with the LED unit, is configured to detect an internal temperature of the LED lamp and adjust an output power of the LED unit, and includes a thermal sensitive module having a negative temperature coefficient thermistor and a phase cut circuit.
    Type: Grant
    Filed: April 27, 2018
    Date of Patent: October 8, 2019
    Inventors: Zhu Mao, Zhangji Zhou, Min Fang, Fanbin Wang, Shuyi Qin
  • Patent number: 10405392
    Abstract: A direct AC LED lighting device is provided with a controller that switches off a bleeder circuit following an initial rising edge for a post diode bridge voltage. The controller measures a first delay between a zero crossing for the post diode bridge voltage and the initial rising edge to estimate a triggering voltage for a leading edge dimmer switch. The controller determines a second delay following the initial rising edge responsive to the estimate of the triggering voltage. The controller may thus switch on the bleeder circuit at an expiration of the second delay so that bleeder circuit is only on for a duration sufficient to develop a voltage difference across the leading edge dimmer switch to equal the triggering voltage just as the post diode bridge voltage satisfies an LED threshold voltage.
    Type: Grant
    Filed: April 16, 2018
    Date of Patent: September 3, 2019
    Inventors: Nan Shi, Haiju Li
  • Patent number: 10390406
    Abstract: Light-emitting diode (LED) driver systems that are scalable and can be used for N-color LED systems are provided. An LED system having N LED strings of different color can be efficiently driven with independently controllable constant current sources for each string from a single power source. The driver system can include a power converter having an inductor.
    Type: Grant
    Filed: September 4, 2015
    Date of Patent: August 20, 2019
    Assignee: Rensselaer Polytechnic Institute
    Inventors: Kumar Modepalli, Leila Parsa
  • Patent number: 10344733
    Abstract: There is provided an internal combustion engine ignition apparatus that can effectively raise the ignitability of an inflammable fuel-air mixture, by applying electric power corresponding to the combustion state of an internal combustion engine. A combustion state detection apparatus detects an combustion state inside a combustion chamber of the internal combustion engine; based on the combustion state detected by the combustion state detection apparatus in accordance with an operation state of an ignition coil apparatus, a current supply apparatus supplies an AC current to a spark discharge path formed in the gap of an ignition plug; then, a control apparatus controls the output of the current supply apparatus.
    Type: Grant
    Filed: October 16, 2017
    Date of Patent: July 9, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Takeshi Koda, Ryo Sakaguchi
  • Patent number: 10342076
    Abstract: An illumination system includes a luminaire, a controller, and a switch that turns ON and OFF power supply to the luminaire. The controller includes: a light intensity controller that performs light intensity control of controlling the brightness of the luminaire; and a power supply controller that instructs the switch to turn OFF the power supply to the luminaire on which the light intensity control is performed at a light intensity rate that is equal to or greater than 0 and at most a predetermined value.
    Type: Grant
    Filed: August 28, 2018
    Date of Patent: July 2, 2019
    Inventor: Mototsugu Kawamata
  • Patent number: 10327301
    Abstract: In various embodiments, a circuit arrangement for operating light sources is provided. The circuit arrangement includes an input for inputting an input voltage, an output for outputting an output current, a first interface for controlling the circuit arrangement, and a second interface. The circuit arrangement is configured to set two different operating modes: in a first operating mode the circuit arrangement is configured to be controlled via the first interface and to receive information concerning the output current via the second interface and to correspondingly set the output current at the output, and in a second operating mode the circuit arrangement is configured to be controlled and to receive the information about the output current to be set at the output via the first interface, and to receive information from a sensor via the second interface and to process said information.
    Type: Grant
    Filed: December 19, 2017
    Date of Patent: June 18, 2019
    Assignee: OSRAM GMBH
    Inventors: Axel Pilz, Markus Heckmann
  • Patent number: 10326377
    Abstract: A DC-to-AC inverter provides an AC voltage to the primary winding of an output isolation transformer having at least one secondary winding and having an auxiliary winding. The current supplied to a secondary load is reflected back into the primary winding as a reflected secondary current. A first feedback signal has a reflected secondary current component and has a primary magnetizing current component. An auxiliary winding voltage is applied to an inductor to generate an auxiliary current proportional to the primary winding magnetizing current. A second feedback signal is responsive to the auxiliary current. The second feedback signal is combined with the first feedback signal to produce a total feedback signal responsive only to the reflected secondary current. The DC-to-AC inverter responds to the total feedback signal and a reference signal to adjust the AC voltage to maintain the total feedback signal at a magnitude corresponding to the reference signal.
    Type: Grant
    Filed: July 30, 2018
    Date of Patent: June 18, 2019
    Assignee: Universal Lighting Technologies, Inc.
    Inventors: Wei Xiong, Travis L. Berry
  • Patent number: 10306717
    Abstract: A flicker-free LED driving apparatus and voltage regulating method thereof are disclosed. The apparatus includes a power conversion circuit receiving an AC electricity and then generating an output voltage with a ripple component for an LED string; a feedback circuit electrically connected to the power conversion circuit and generating a feedback signal with varying duty cycle according to operation states of the LED string; a power conversion circuit including, a controller receiving the feedback signal turns on or off a switching device thereof according to the feedback signal; and a linear voltage-regulating circuit electrically connected to the power conversion circuit, the feedback circuit, and the LED string. and configured to regulate the output voltage in accordance with a voltage difference between the output voltage and a voltage across the LED string.
    Type: Grant
    Filed: July 18, 2018
    Date of Patent: May 28, 2019
    Inventors: Yeu-Torng Yau, Tsung-Liang Hung
  • Patent number: 10292217
    Abstract: System and method for dimming control. The system includes a system controller, a transistor, and a resistor. The system controller includes a first controller terminal and a second controller terminal. The transistor includes a first transistor terminal, a second transistor terminal and a third transistor terminal. The resistor including a first resistor terminal and a second resistor terminal. The first transistor terminal is coupled, directly or indirectly, to the second controller terminal. The first resistor terminal is coupled to the second transistor terminal. The second resistor terminal is coupled to the third transistor terminal. The system controller is configured to receive an input signal at the first controller terminal and to generate an output signal at the second controller terminal. The transistor is configured to receive the output signal at the first transistor terminal and to change between a first condition and a second condition.
    Type: Grant
    Filed: December 7, 2016
    Date of Patent: May 14, 2019
    Assignee: On-Bright Electronics (Shanghai) Co., Ltd.
    Inventors: Liqiang Zhu, Jun Zhou, Lieyi Fang
  • Patent number: 10277134
    Abstract: A switching power supply device includes a first converter of boost type to which a full-wave rectified AC power supply is input, and a second converter of current resonant type to which an output of the first converter is supplied as an input voltage. The second converter has a normal mode for performing power supply control by continuously outputting an output of an oscillator to a switching element of the second converter and a standby mode for performing power supply control by intermittently outputting the output of the oscillator thereto under light load by comparing a feedback voltage from a secondary side of an isolation transformer with a threshold voltage. The second converter corrects the threshold voltage according to an output voltage of the first converter.
    Type: Grant
    Filed: November 29, 2016
    Date of Patent: April 30, 2019
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventor: Koji Sonobe
  • Patent number: 10199935
    Abstract: Various examples are provided for hybrid boosting converters (HBCs). In one example, a HBC includes an inductive switching core and a bipolar voltage multiplier (BVM) coupled to the inductive switching core. In another example, a HBC micro-inverter includes an inductive switching core coupled to an input voltage; a BVM comprising a positive branch and a negative branch coupled to the inductive switching core; and a switched bridge coupled across the positive and negative branches of the BVM. In another example, a 3D HBC includes a common axis comprising a series of capacitors; and a plurality of parallel wings coupled to the common axis. The parallel wings form a BVM when coupled to the common axis and include an inductive switching core that is coupled to an input voltage. The common axis can include a single input voltage or multiple input voltages can be coupled through the wings.
    Type: Grant
    Filed: September 11, 2015
    Date of Patent: February 5, 2019
    Inventors: Bin Wu, Keyue Smedley
  • Patent number: 10186977
    Abstract: An electric power conversion device includes: a transformer including first and second windings magnetically coupled; a bridge circuit including a switch element; a rectifier circuit coupled to an output side of the transformer; a first resonant inductor; a second resonant inductor external to the transformer; and a resonant capacitor, wherein n1?n2, Cr>C1, and Lr>L2 where Lr is an inductance value of the first resonant inductor and L2 is an inductance value including an inductance value of the second resonant inductor and an inductance value of a parasitic inductance component that is in series with the second winding in the pathway from the second winding to the rectifier circuit.
    Type: Grant
    Filed: May 17, 2018
    Date of Patent: January 22, 2019
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Masahiro Yamaoka, Takehiko Yamakawa, Motohiko Fujimura
  • Patent number: 10141863
    Abstract: According to one embodiment, a controller determines the polarity of the input voltage detected by an input voltage detector. Then, when the polarity of the input voltage is positive, the first switch is subject to pulse driving, and when the polarity of the input voltage is negative, the second switch is subject to pulse driving, where the pulse driving is carried out at an on/off timing determined on the basis of the respective detection outputs of an input voltage detector, an input current detector, an output voltage detector, and an output current detector.
    Type: Grant
    Filed: January 25, 2016
    Date of Patent: November 27, 2018
    Inventor: Yutaka Usami
  • Patent number: 10132284
    Abstract: An ignition device is provided for an idle stop & go system (ISG)-equipped vehicle using a liquefied petroleum gas (LPG) as a fuel. A separately installed auxiliary LPG switch detects the ON/OFF state of the LPG switch, drives fuel cut-off solenoid valves, and switches on/off together with the LPG switch. The ON/OFF state of the LPG switch can be determined based on an output voltage of the auxiliary LPG switch, and then ISG control can be implemented. After the fuel cut-off solenoid valves are driven, the fuel pipeline pressure remains in the state before the idle stop to improve the engine starting performance upon restarting. Also, in an emergency, the LPG and auxiliary LPG switches are simultaneously switched off, the fuel cut-off solenoid valves are quickly switched off and the fuel pump motor is stopped to quickly cut off the fuel supply and prevent a secondary accident in advance.
    Type: Grant
    Filed: February 14, 2014
    Date of Patent: November 20, 2018
    Inventor: Kim Mihnsung
  • Patent number: 10097045
    Abstract: An apparatus for wireless transmission of power from a DC voltage source to a DC voltage load, includes: one primary coil coupled with one secondary coil, the primary coil and the secondary coil each equipped with at least one capacitor, so that the primary coil resonates at a frequency that at least equal the secondary coil resonant frequency; the resonant coils are mutually moveable; a converter that converts the DC voltage at a primary side to an AC voltage of controllable magnitude and frequency; at least one rectifier at the secondary side converts the AC voltage at the terminals of the secondary coil to a DC voltage at the load on the secondary side; and a control system that regulates the power flow by changing the magnitude and frequency of the AC voltage at the terminals of the primary resonant coil.
    Type: Grant
    Filed: January 19, 2016
    Date of Patent: October 9, 2018
    Inventor: Giuseppe Guidi
  • Patent number: 10041984
    Abstract: A system for a linear isolated power supply circuit may include a boost converter having a boost inductor winding and an auxiliary side winding, the auxiliary side winding configured to be magnetically coupled to the boost inductor winding. The linear isolated power supply circuit includes a voltage sensing circuit coupled to the auxiliary side winding, the voltage sensing circuit configured to measure an input voltage at an isolated circuit associated with the auxiliary winding. The linear isolated power supply circuit includes a processor configured to receive the measured input voltage from the voltage sensing circuit and to cause at least one operation to be performed by the processor based at least in part upon the measured input voltage. Methods and apparatuses corresponding to the system are provided.
    Type: Grant
    Filed: August 3, 2017
    Date of Patent: August 7, 2018
    Assignee: Universal Lighting Technologies
    Inventors: Scott Price, Stephen D. Mays, II, John J. Dernovsek, II, Dane Sutherland, Keith Davis, Wei Xiong
  • Patent number: 10033281
    Abstract: Disclosed examples include integrated circuits configurable according to sensed circuit conditions to provide configurable power converter topologies with externally connected circuitry to implement buck, boost, buck-boost, low dropout and/or hot-swap power converters. The ICs include one or more sets of series connected high and low side transistors connected with corresponding IC pads to allow connection to external circuitry to form a particular power converter configuration. The IC includes a control circuit and a configuration circuit to sense a circuit condition of the IC and to configure the control circuit to provide switching control signals to the transistors to implement one of a plurality of power converter topologies.
    Type: Grant
    Filed: November 10, 2017
    Date of Patent: July 24, 2018
    Assignee: Texas Instruments Incorporated
    Inventors: Chuan Ni, Timothy P. Pauletti
  • Patent number: 10033373
    Abstract: To operate a load a half bridge includes a switching device with a high-side semiconductor switch and a low-side semiconductor switch. The semiconductor switches are connected in series via their current terminals, and each semiconductor switch may be assigned, via its control terminal, a driving system that switches the respective semiconductor switch on or off according to a drive signal. The load is connectable between the high-side and low-side semiconductor switches. The half bridge may include a load relief device connected to the switching device, e.g., in order to collect energy during a switching process in the switching device. The half bridge can\include an energy recovery circuit configured to feed the energy collected by the load relief device, e.g., a current, to an energy storage device before a further energy collection, e.g., current collection, of the load relief device, during a further switching process in the switching device.
    Type: Grant
    Filed: March 31, 2017
    Date of Patent: July 24, 2018
    Inventor: Uwe Prüssmeier
  • Patent number: 10027377
    Abstract: A power transmitter coil, a power transmitter circuit, and a direct-current power source constitute a power transmitter unit. Further, a power receiver coil, a power receiver circuit, and a load constitute a power receiver unit. Further, a resonator coil and a resonator circuit constitute a resonator unit. In the power transmitter unit, electric energy of the direct-current power source is directly converted into electromagnetic energy, a resonant field is expanded by making resonance currents of the same frequency to flow in the power transmitter coil and the resonator coil, and in the power receiver unit, electromagnetic energy of the resonant field is directly converted into electric energy, thereby transmitting electric power from the power transmitter unit to the power receiver unit.
    Type: Grant
    Filed: July 28, 2015
    Date of Patent: July 17, 2018
    Assignee: Murata Manufacturing Co., Ltd.
    Inventor: Tatsuya Hosotani
  • Patent number: 10015851
    Abstract: A ballast circuit suitable for driving an LED or similar load, comprises a primary switch mode converter, means for measuring a modulation, such as a phase cut, as used for dimming light levels, on an input AC supply, a current regulator positioned in series with the load, and a feedback controller for controlling operation of the switch mode controller based upon measured modulation levels. The feedback controller is adapted to interrupt normal switching of the switch mode converter if modulation levels detected lead to the ballast working at a lower than desired efficiency (deep dimming), or if voltage levels across the current regulator are higher than desired. The feedback controller may have a further feedback means for controlling switch mode parameters during lower levels of modulation (shallow dimming). The circuit allows large dimming levels to be achieved without generating appreciable light flicker in the load.
    Type: Grant
    Filed: July 27, 2015
    Date of Patent: July 3, 2018
    Assignee: Accuric Ltd.
    Inventor: David Charles Bannister
  • Patent number: 9986605
    Abstract: Systems and methods are provided for regulating a power conversion system. An example system controller includes: a detection component configured to receive an input voltage related to a diode connected to an inductor and output a first signal at a first logic level in response to the input voltage being larger than a predetermined threshold, a control logic component configured to receive the first signal, process information associated with the first signal, and output a modulation signal related to a modulation frequency in response to the first signal being at the first logic level, and a driving component configured to receive the modulation signal and output a drive signal to open and close a first switch at the modulation frequency.
    Type: Grant
    Filed: May 8, 2014
    Date of Patent: May 29, 2018
    Assignee: Guangzhou On-Bright Electronics Co., Ltd.
    Inventor: Lieyi Fang
  • Patent number: 9967935
    Abstract: The invention relates to a LED light source comprising: input terminals for connection to a mains voltage supply source, a rectifier coupled to the input terminals for rectifying the mains supply voltage supplied by the mains supply voltage source and comprising rectifier output terminals, a DC-DC converter for generating a DC current out of the rectified mains supply voltage, comprising converter input terminals connected to the rectifier output terminals and comprising a first converter output terminal and a second converter output terminal, a LED load with an anode coupled to the first converter output terminal via a first current control element for blocking a current flowing from the anode of the LED load to the first converter output terminal, and with a cathode coupled to the second converter output terminal via a first controllable switch having a control electrode coupled to first control circuitry for rendering the controllable switch non-conductive in case the LED light source is in standby mode
    Type: Grant
    Filed: May 23, 2016
    Date of Patent: May 8, 2018
    Inventors: Fokko Jan Willem Hulshof, Wilhelmus Josephus Cornelissen
  • Patent number: 9936552
    Abstract: In one example, a system includes a controller, a transformer including at least a primary winding and an auxiliary winding, a voltage supply, and a driver. The controller is configured to output an indication of a target current or a target power. The voltage supply is configured to receive an electrical current having a constant average current over time from the auxiliary winding and to output variable electrical current for supplying the controller. The voltage supply includes a capacitor for storing energy and a current sink for consuming a current. The driver is configured to selectively energize the primary winding for supplying one or more load devices based on the target current or the target power and selectively energize the primary winding for operating the voltage supply based on an indication of a voltage at the voltage supply.
    Type: Grant
    Filed: February 8, 2017
    Date of Patent: April 3, 2018
    Assignee: Infineon Technologies Austria AG
    Inventors: Tiam Poh Lau, Marcus Schaemann
  • Patent number: 9899911
    Abstract: A power source circuit includes first and second input terminals; first, second, and third inductors; first and second switching devices; first and second capacitors; and first and second output terminals. A first end of the second inductor is connected to a path that connects the first input terminal and the first node, a second end of the second capacitor is connected to a path that connects the second input terminal and the second node, and the first inductor and the second inductor are magnetically coupled with each other. A first end of the third inductor and a second end of the second inductor are connected to each other. A second end of the third inductor and a first end of the second capacitor are connected to each other.
    Type: Grant
    Filed: February 8, 2016
    Date of Patent: February 20, 2018
    Inventors: Taiki Nishimoto, Akira Minegishi
  • Patent number: 9894727
    Abstract: A LED driver having at least one Integrated Circuit (IC), the IC programmable using a hardware description language; a first electronic switch operable to provide a first switching time period to control power factor voltage, the first switching time period programmable by the at least one IC; and a second electronic switch operable to provide a second switching time period to regulate ripple free constant DC electrical current flowing into the at least one LED, the second switching time period is programmable by the at least one IC.
    Type: Grant
    Filed: July 13, 2016
    Date of Patent: February 13, 2018
    Inventors: Kai Fook Francis Wee, Chye Boon Tan, Hai Boon Tan, Andrea Stona, Soon Thiam Chan
  • Patent number: 9877367
    Abstract: An LED lamp comprises one or more LEDs and an LED driver receiving an input signal from a dimmer switch indicative of an amount of dimming for the LED lamp. The LED driver controls regulated current through the one or more LEDs based on the input signal such that an output light intensity of the one or more LEDs substantially corresponds to the amount of dimming for the LED lamp. A regulated output provides operating power for the LED driver. A controller regulates the regulated output to power the LED driver. The controller selects a power source for charging the regulated output from two or more power sources, and the regulated output is charged using the power source selected by the controller.
    Type: Grant
    Filed: April 26, 2017
    Date of Patent: January 23, 2018
    Assignee: Dialog Semiconductor Inc.
    Inventors: Chuanyang Wang, Chenglong Zhang, Nan Shi, Clarita C. Knoll, Guang Feng
  • Patent number: 9854630
    Abstract: A flicker-free dimming circuit for non-point light source has a TRIAC module, an input module, a conversion module and an output module. The TRIAC module adjusts the voltage phase of an external power supply for the input module to export an input voltage, and the conversion module in a boost circuit structure is provided with a conversion coil and a converter to receive and raise the voltage value of the input voltage to a voltage value of an operating voltage and then supplies the operating voltage to the output module. The output module adopts a fly-back circuit structure and induces the operating voltage to form a driving voltage in a constant value and then outputs the driving voltage to a lamp with a relatively wide light source area. In this way, the panel lamp can meet high safety standards and enhance its product adaptability and competiveness.
    Type: Grant
    Filed: February 8, 2017
    Date of Patent: December 26, 2017
    Assignee: Unity Opto Technology Co., Ltd.
    Inventors: Chih-Hsien Wu, Kai-Cheng Chuang, Cheng-Han Hung