With Power Factor Control Device Patents (Class 315/247)
  • Patent number: 11615819
    Abstract: A voltage generation circuit includes a noise attenuation circuit configured to attenuate a noise of a second power voltage which has a level that is at least two times higher than that of a first power voltage, and a multi-stage voltage pump configured to receive a noise-attenuated second power voltage from the noise attenuation circuit and generate at least one of plural target voltages, each target voltage having a different level. The first and second power voltages are individually input from an external device via different pins or pads.
    Type: Grant
    Filed: August 2, 2021
    Date of Patent: March 28, 2023
    Assignee: SK hynix Inc.
    Inventor: Lee Hyun Kwon
  • Patent number: 11477871
    Abstract: A lighting circuit turns on a plurality of semiconductor light sources. Multiple current sources are each coupled to a corresponding semiconductor light source. A switching converter supplies a driving voltage VOUT across each of multiple series connection circuits each formed of the semiconductor light source and the current source. A converter controller employing a ripple control method turns on a switching transistor of the switching converter in response to a voltage across any one of the multiple current sources decreasing to a bottom limit voltage.
    Type: Grant
    Filed: May 14, 2020
    Date of Patent: October 18, 2022
    Inventors: Tomoyuki Ichikawa, Ryosuke Matsuhana, Satoshi Kikuchi, Naoki Kawabata, Norito Takahashi
  • Patent number: 11452186
    Abstract: Methods and systems for improved dimming of LED based illumination devices are described herein. An AC input voltage provided to an LED driver is rectified and the rectified signal is monitored by a Rectified Voltage Monitor (RVM) circuit. The RVM circuit generates a low voltage monitor signal indicative of the shape and peak voltage of the rectified signal. The monitor signal and the rectified signal are communicated to a power converter of the LED driver. The controller of the power converter employs the monitor signal to maintain efficiency and stability of the LED driver over an extended range of AC input voltage. The instantaneous voltage of the rectified signal is divided-down, and the peak value of the divided-down rectified signal is captured and stored on one or more capacitive elements. In another aspect, the peak voltage stored on one or more capacitive elements is less than 100 Volts.
    Type: Grant
    Filed: November 18, 2021
    Date of Patent: September 20, 2022
    Assignee: Cuvee Systems, Inc.
    Inventors: Dongsheng Zhou, Lanh Cong Nguyen
  • Patent number: 11160155
    Abstract: An intelligent lighting system may be installed using pre-existing electrical wiring, such as in a construction or retrofit environment. An intelligent lighting controller and an intelligent lighting fixture may be connected via electrical wiring that is configured for transmitting AC power signals. A commissioning signal may be transmitted to the intelligent lighting fixtures via the electrical wiring. In some cases, the intelligent lighting controller modifies portions of the AC power signal to indicate the commissioning signal. The intelligent lighting fixtures may receive the commissioning signal via the electrical wiring. In some cases, each intelligent lighting fixture that is connected to the electrical wiring, such as each intelligent lighting fixture on a lighting circuit in a room, receives the commissioning signal.
    Type: Grant
    Filed: July 6, 2020
    Date of Patent: October 26, 2021
    Assignee: ABL IP Holding LLC
    Inventors: Richard Lee Westrick, Jr., Dalibor Zulim, Marc Saes
  • Patent number: 11121541
    Abstract: A Boost DC-DC switching converter, having a safety protection method for a short circuit to ground during normal Boost operations, is described. A short circuit protection mechanism, to be used at startup, is also described. A low current capability active clamp is activated, during a soft or hard short circuit condition, and an isolation switch is turned off. An input of the switching converter is isolated from an output of the switching converter, and the Boost switching converter is able to safely discharge high energy stored in its coil, with no external components and minimum extra silicon area.
    Type: Grant
    Filed: February 27, 2019
    Date of Patent: September 14, 2021
    Assignee: Dialog Semiconductor (UK) Limited
    Inventors: Louis de Marco, Nicusor Bortun, Giovanni Tarroboiro
  • Patent number: 11109462
    Abstract: A backlight, a control method of the backlight, and a display device are provided. The backlight includes a plurality of light-emitting modules arranged in an array. Each of the light-emitting modules includes a light-emitting unit and a control circuit. The control circuit includes n branches, a controller, and a current module. Each branch of the n branches is connected in series with the light-emitting unit and the current module. Each branch is provided with a switch, and the controller is separately connected to the switch on each branch.
    Type: Grant
    Filed: May 13, 2019
    Date of Patent: August 31, 2021
    Inventors: Feng Zi, Jian Sun, Ziqiang Guo, Jiyang Shao, Xinjian Liu, Feng Pan, Yakun Wang, Binhua Sun, Hao Zhang, Lili Chen
  • Patent number: 11107384
    Abstract: A display driving device includes sensing lines configured to sense pixel signals of a display panel; and a voltage limiter provided for each of the sensing lines. The voltage limiter senses a voltage variation of the sensing line, and limits a voltage level of the sensing line to a reference voltage.
    Type: Grant
    Filed: April 17, 2020
    Date of Patent: August 31, 2021
    Assignee: Silicon Works Co., Ltd.
    Inventors: Young Bok Kim, Won Kim
  • Patent number: 11095206
    Abstract: A power converter can include an input boost converter stage having an input configured to receive a rectified AC input voltage and an output configured to deliver a DC bus voltage and a second switching converter stage having an input configured to receive the DC bus voltage and an output configured to deliver a regulated output voltage. The input boost converter may be configured to be operated in a flat current mode to maintain a substantially constant DC bus voltage over a broad range of AC input voltages. The input boost converter may be further configured to be operated in an active blanking mode, wherein operation of the boost converter is prevented during a controlled blanking interval of each cycle of the rectified AC input voltage. The controlled blanking interval may be increased responsive at least in part to an increase in the AC input voltage and/or may be decreased responsive at least in part to a decrease in the AC input voltage.
    Type: Grant
    Filed: September 27, 2019
    Date of Patent: August 17, 2021
    Assignee: Apple Inc.
    Inventors: InHwan Oh, Bharat K. Patel, Abby Cherian
  • Patent number: 10961143
    Abstract: A method and system of providing ultrapure water for semiconductor fabrication operations is provided. The water is treated by utilizing a free radical scavenging system. The free radical scavenging system can utilize actinic radiation with a free radical precursor compound, such as ammonium persulfate. The ultrapure water may be further treated by utilizing ion exchange media and degasification apparatus. A control system can be utilized to regulate a continuously variable intensity of the actinic radiation.
    Type: Grant
    Filed: May 4, 2016
    Date of Patent: March 30, 2021
    Assignee: Evoqua Water Technologies LLC
    Inventors: Christopher Hall, Bruce Lee Coulter
  • Patent number: 10938307
    Abstract: This disclosure describes a system and a method to limit (i.e., regulate) the input power of a power converter as a function of the voltage and/or loading condition of a power-limited source such as a battery. In some embodiments, the power converter may comprise a transconductance amplifier that may produce a sink current to a current mirror, which in turn that may provide an adjusted current limit threshold to the power converter. The power converter may utilize the current limit threshold to perform cycle-by-cycle current limiting, thus regulating the input power drawn from the battery.
    Type: Grant
    Filed: September 4, 2018
    Date of Patent: March 2, 2021
    Assignee: Apple Inc.
    Inventors: Yongxuan Hu, Weiyun Chen, Stephen C. Terry, Chi Kin Ho, Norah E. Nakibuuka
  • Patent number: 10903621
    Abstract: The present disclosure is directed toward circuits for driving one or more laser diodes with a series of current pulses, where the energy required for each current pulse is generated and stored on a pulse-by-pulse basis. Laser-driver circuits in accordance with the present disclosure include a charge-storage inductor that is electrically coupled with a power supply and a charge-storage capacitor that is electrically coupled with a laser-diode string. The electrical coupling between the inductor and capacitor is controlled by one or more switches having on- and off-states that determine whether the inductor is charged by the power supply, charges the capacitor, or whether the charged capacitor generates a current pulse in the laser-diode string. By controlling the states of the switches, the energy provided to the laser-diode string can be controlled on a pulse-by-pulse basis.
    Type: Grant
    Filed: January 22, 2019
    Date of Patent: January 26, 2021
    Assignee: ARGO AI, LLC
    Inventor: Mark C. Stern
  • Patent number: 10873263
    Abstract: System controller and method for a power converter. For example, a system controller for a power converter includes a logic controller configured to generate a modulation signal, and a driver configured to receive the modulation signal, generate a drive signal based at least in part on the modulation signal, and output the drive signal to switch to affect a current flowing through an inductive winding for a power converter. Additionally, the system controller includes a voltage-to-voltage converter configured to receive a first voltage signal, the modulation signal, and a demagnetization signal, and to generate a second voltage signal based at least in part on the first voltage signal, the modulation signal, and the demagnetization signal.
    Type: Grant
    Filed: October 16, 2018
    Date of Patent: December 22, 2020
    Assignee: On-Bright Electronics (Shanghai) Co., Ltd.
    Inventors: Zhuoyan Li, Liqiang Zhu, Jiqing Yang, Lieyi Fang
  • Patent number: 10833592
    Abstract: Switching between a dual switch topology and a bridge forward topology in a power converter includes: receiving an input voltage; providing, via the dual switch topology, an output voltage; determining that the input voltage falls below a first threshold; switching a path of the input voltage from the dual switch topology to the bridge forward topology; and providing, via the bridge forward topology, the output voltage.
    Type: Grant
    Filed: August 13, 2019
    Date of Patent: November 10, 2020
    Assignee: International Business Machines Corporation
    Inventors: Michael L. Miller, Patrick K. Egan
  • Patent number: 10813186
    Abstract: A hybrid light emitting device includes a full-wave bridge rectifier, an AC-to-DC converter, a hybrid illumination module, a luminance control module and a linear constant current circuit. The full-wave bridge rectifier transforms a full sinusoidal wave voltage into a positive half sinusoidal wave voltage. The AC-to-DC converter is electrically coupled to the full-wave bridge rectifier. The AC-to-DC converter transforms the positive wave voltage into a constant DC voltage. The hybrid illumination module includes a plurality of illuminating elements having different or partially same luminance properties. The plurality of illuminating elements are disposed in respective proximities. The luminance control module generates a plurality of control signals that determine the duty cycles of the plurality of illuminating elements. The linear constant current circuit controls duty cycles of the plurality of illuminance elements using the plurality of control signals.
    Type: Grant
    Filed: January 28, 2019
    Date of Patent: October 20, 2020
    Inventors: Hong Kui Jiang, Hui Wu Chen, Yan Biao Chen, Wei Liu
  • Patent number: 10764977
    Abstract: An LED light temperature control system includes a dimmer switch comprising a single power input, an output signal, and an control device configured to vary the duty cycle of the output signal. The LED light temperature control system further includes a light controller configured to receive the output signal from the dimmer switch. The light controller has a first light output signal configured to power a first group of LEDs and a second light output signal configured to power a second group of LEDs. The light controller is configured to vary the duty cycle of the first light output signal proportionate to the duty cycle of the dimmer switch output signal. The light controller is further configured to vary the duty cycle of the second light output signal inversely to the duty cycle of the dimmer switch output signal.
    Type: Grant
    Filed: April 8, 2019
    Date of Patent: September 1, 2020
    Assignee: ITC Incorporated
    Inventor: Dirrick Ferrell
  • Patent number: 10760547
    Abstract: A method for controlling voltage of a DC link of a power converter of an electrical power system connected to a power grid includes operating the DC link to an optimum voltage set point that achieves steady state operation of the power converter. The method also includes monitoring the power grid for one or more transient events that may be an indicator of one or more sub-synchronous control interaction (SSCI) conditions occurring in the electrical power system. Upon detection of the transient event(s) occurring in the power grid, the method also includes immediately increasing the optimum voltage set point to a higher voltage set point of the DC link. Moreover, the method includes operating the DC link at the higher voltage set point until the sub-synchronous control interaction(s) is damped, thereby optimizing voltage control of the DC link.
    Type: Grant
    Filed: December 18, 2018
    Date of Patent: September 1, 2020
    Assignee: General Electric Company
    Inventors: Dustin Howard, Min Naing Lwin, Robert Gregory Wagoner, Govardhan Ganireddy
  • Patent number: 10716183
    Abstract: An interface currents channeling circuit may be used to convert two current channels of a conventional two-channel driver into three driving currents for the three strings of LEDs. By doing so, the same two channel driver can be used for applications requiring just two LED arrays as well as three LED arrays.
    Type: Grant
    Filed: July 2, 2017
    Date of Patent: July 14, 2020
    Assignee: Lumileds LLC
    Inventors: Frederic S. Diana, Yifeng Qiu
  • Patent number: 10642401
    Abstract: A touch-sensitive dimmer, configured to be electrically coupled to an illumination load to adjust an illuminance of the illumination load. It includes a hollow body, a power source printed circuit board assembly (PCBA) disposed inside the body, a control PCBA, and a touch-sensitive display panel, touch-sensing components and a display element disposed on the control PCBA. The display element displays changes of illumination load adjustment modes based on trigger signals generated by the touch-sensing components. The touch-sensitive display panel includes touch keys which correspond to the touch-sensing components and a display window which corresponds to the display element, and is assembled with the control printed circuit board assembly. The touch-sensitive dimmer combines touch-sensing functions and display screen functions to achieve intelligent control. By incorporating a wireless communication module, the dimmer can further achieve remote by a remote control device.
    Type: Grant
    Filed: March 12, 2018
    Date of Patent: May 5, 2020
    Inventor: Long Zhang
  • Patent number: 10624159
    Abstract: Drivers (1-10) for driving load circuits (100) comprise supply circuits (1) for providing supply current signals from a mains source to the load circuits (100), storage circuits (2) for storing energy destined for the load circuits (100), and switch circuits (3-8) coupled with the storage circuit (2), the load circuit (100) and the supply circuit (1), and for switching the coupling among the storage circuits (2), the load circuit (100) and the supply circuit (1). The switched storage circuits (2) can, in charge states, be charged via the supply current signals, and in bypass states be bypassed, and in dependent discharge states be discharged via the load circuit (100) together with the supply current signals, and in independent discharge states be discharged via the load circuits (100) independently from the supply current signals for a substantial time duration.
    Type: Grant
    Filed: March 1, 2016
    Date of Patent: April 14, 2020
    Assignee: SIGNIFY HOLDING B.V.
    Inventors: Yifeng Qiu, Pieter Gerrit Blanken
  • Patent number: 10616971
    Abstract: A method of managing an output voltage of a LED driver to prevent damage to a LED load coupled thereto from a transient current is described. The method includes energizing a LED driver coupled to a microcontroller circuit. The microcontroller circuit samples a plurality of signals from the LED driver circuit. Moreover, the microcontroller circuit determines if an interruption event has occurred. The interruption event may include a main voltage supply interruption, intermittently removing and reconnecting a load, such as a loose LED load, and hot-swapping one LED load for another. The method further includes preventing a transient current from damaging the LED load if the interruption event has occurred. A system including circuits related to the method are also described.
    Type: Grant
    Filed: October 17, 2018
    Date of Patent: April 7, 2020
    Assignee: Appleton Grp LLC
    Inventors: Virgil Roy Requiroso Ajo, Leon Dela Cruz Placido, Jr., Neil Jingo Samson Valmonte
  • Patent number: 10601315
    Abstract: A DC-DC converter is provided with: a first switching circuit in which a first element unit and a second element unit are provided in series between a first conductive path and a reference conductive path; a second switching circuit in which a third element unit and a fourth element unit are provided in series between the first conductive path and the reference conductive path; a first inductor that is connected between a connection node that connects the third element unit and the fourth element unit, and a second conductive path; and a second inductor that is connected between a connection node that connects the first element unit and the second element unit, and the connection node that connects the third element unit and the fourth element unit. A drive unit controls the first switching circuit and the second switching circuit.
    Type: Grant
    Filed: October 24, 2017
    Date of Patent: March 24, 2020
    Assignees: AutoNetworks Technologies, Ltd., Sumitomo Wiring Systems, Ltd., Sumitomo Electric Industries, Ltd.
    Inventors: Kazuki Masuda, Tou Chin
  • Patent number: 10602576
    Abstract: The invention relates to an operating device for loads in the form of lighting means, particularly for LEDs, comprising: a clocked converter (B) having a switching element (20); a control unit (C) for switching the switching element (20) with an operating frequency, the operating frequency of the converter (B) being modulated as a forward or feedforward control.
    Type: Grant
    Filed: December 20, 2013
    Date of Patent: March 24, 2020
    Assignee: TRIDONIC GMBH & CO KG
    Inventor: Christoph Vonach
  • Patent number: 10588195
    Abstract: The invention provides a solid state (e.g. LED) tubular lighting device having pin safety circuits connected to connecting pins at each end. A driver circuit is connected to the outputs of the pin safety circuits. The pin safety circuits each comprise a TRIAC switch which is adapted to form a closed switch in response to a voltage between the connecting pins. This provides a pin safety solution suitable at least for rapid start EM ballasts.
    Type: Grant
    Filed: April 4, 2017
    Date of Patent: March 10, 2020
    Assignee: SIGNIFY HOLDING B.V.
    Inventors: Haimin Tao, Yi Wang, Huojun Long
  • Patent number: 10579083
    Abstract: An electronic system having a linear voltage regulator and method of operating the linear voltage regulator. A linear voltage regulator of an electronic system has at least three ballast devices. The method of operating includes producing a voltage at an output terminal that is electrically coupled to a node of a first one of the three or more ballast devices; receiving a power mode indication; activating a first additional ballast device of the linear voltage regulator to add first additional capacitance to a load corresponding to the power mode; generating one or more successively delayed ballast control signals based at least in part on the power mode indication; and activating, using the successively delayed ballast control signals, second additional ballast devices of the linear voltage regulator to add second capacitances to the load of the linear voltage regulator.
    Type: Grant
    Filed: November 30, 2018
    Date of Patent: March 3, 2020
    Inventors: Kishan Reddy Gonapati, Aswani Aditya Kumar Tadinada, Manoja Dangeti
  • Patent number: 10536997
    Abstract: Devices (1) for producing light comprise inputs (11) for receiving feeding signals via ballasts (2) designed for fluorescent tubes to be replaced by non-fluorescent tubes, drivers (12) for driving light circuits (13), first receivers (14) for receiving definition signals defining features of the ballasts (2), and controllers (15) for, in response to receptions of the definition signals, adapting functions of the devices (1). The functions may comprise reporting functions, whereby apparatuses (3) are informed by the devices (1) about amounts of consumed power of the devices (1) and amounts of consumed power of the ballasts (2). Then, for example in dimming situations, overviews of total amounts of consumed power are realized. The functions may comprise driving functions whereby the light circuits (13) are driven in accordance with requirement data of the ballasts (2). Then, for example in dimming situations, first dimming levels may be forbidden and second dimming levels may be allowed.
    Type: Grant
    Filed: February 11, 2016
    Date of Patent: January 14, 2020
    Assignee: SIGNIFY HOLDING B.V.
    Inventor: Eric Johannus Hendricus Cornelis Maria Nieuwlands
  • Patent number: 10439719
    Abstract: A lighting device includes: a constant current supply circuit; and a first modulation circuit and a second modulation circuit that are connected in series between output terminals of the constant current supply circuit. The first modulation circuit includes a first capacitor that is connected in parallel to the first modulation circuit. The second modulation circuit includes a second capacitor that is connected in parallel to the second modulation circuit.
    Type: Grant
    Filed: May 20, 2018
    Date of Patent: October 8, 2019
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Keisuke Seki, Shigeru Ido, Kazuhiko Hayashi
  • Patent number: 10433385
    Abstract: A dimming system for LED lamps, comprising a DC/DC converter, a dimming signal input module, a brightness value conversion module electrically connected to the dimming signal input module, and a dimming signal switching threshold setting module, a first signal output module, and a second signal output module. The dimming signal input module is configured to input a dimming signal. And when the brightness value is greater than or equal to the dimming signal switching threshold, the value of the amplitude dimming voltage output by the first signal output module is equal to the dimming signal switching threshold and the second signal output module outputs one PWM signal. The PWM signal modulates the amplitude dimming voltage having a magnitude equal to the dimming signal switching threshold to adjust the output of the DC/DC converter.
    Type: Grant
    Filed: October 17, 2018
    Date of Patent: October 1, 2019
    Assignee: Self Electronics Co., Ltd.
    Inventor: Xuhong Ma
  • Patent number: 10368410
    Abstract: A technique to eliminate perceptible flickering by LEDs being dimmed by PWM pulses is disclosed. A controllable oscillator controls a switching frequency of a converter for supplying a regulated current or regulated voltage. The converter controls a first switch at a switching frequency. A varying second signal level is generated by a spread spectrum control (SSC) circuit for controlling the oscillator to vary the switching frequency during operation. A PWM dimming circuit generates a string of PWM pulses that control a switch in series with the LEDs. The SSC circuit is synchronized with the PWM pulses to generate the same second signal level at a start of each PWM pulse, such that the switching frequency of the converter is forced to be substantially the same at the start of each PWM pulse while the pulse widths are constant. The repeating driving current waveform eliminates perceptible flicker by the LEDs.
    Type: Grant
    Filed: October 19, 2012
    Date of Patent: July 30, 2019
    Assignee: Linear Technology Corporation
    Inventors: Xin Qi, Eric S. Young, Keith D. Szolusha
  • Patent number: 10244372
    Abstract: Device, comprising a main element (ME) and a set of at least two auxiliary elements (SEi), said main element including a master SWP interface (MINT), each auxiliary element including a slave SWP interface (SLINTi) connected to said master SWP interface of said NFC element through a controllably switchable SWP link (LK) and management means (PRM, CTLM, AMGi) configured to control said SWP link switching for selectively activating at once only one slave SWP interface on said SWP link.
    Type: Grant
    Filed: October 27, 2016
    Date of Patent: March 26, 2019
    Inventors: Pierre Rizzo, Alexandre Charles, Juergen Boehler, Thierry Meziache
  • Patent number: 10199555
    Abstract: A driver for a circuit with a capacitive load, is disclosed, including an input stage, a bi-directional power converter, and a controller to control the driver. The power converter includes an inductive device and two switches configured to receive a DC input voltage vin from the input stage and generate an analog output waveform having an amplitude greater than vin providing an output distortion below 5% without an output low-pass filter.
    Type: Grant
    Filed: December 20, 2017
    Date of Patent: February 5, 2019
    Assignee: President and Fellows of Harvard College
    Inventor: Simon Chaput
  • Patent number: 10178724
    Abstract: An optoelectronic circuit receiving a variable voltage containing alternating ascending and descending phases, which circuit comprises sets of light-emitting diodes mounted in series, a module for each set for comparing the voltage at one of the terminals of the set with at least a first threshold and a control module which is connected to the comparison modules and is suitable, during each ascending phase, for interrupting the flow of a current in each set when said voltage of said set goes above the second threshold or when said voltage of the set which is adjacent to said set and through which current passes goes above the first threshold and is suitable, during each descending phase, for controlling the flow of a current in each set when said voltage of the set which is adjacent to said set and through which current passes goes below the first threshold.
    Type: Grant
    Filed: June 30, 2015
    Date of Patent: January 8, 2019
    Assignee: Aledia
    Inventor: Frédéric Mercier
  • Patent number: 10172195
    Abstract: The invention relates to an operating device (1) for operating lighting means, in particular LEDs, comprising: a potential-isolated clocked converter (3), having a transformer (T), which has a primary winding (N1) and a seconding winding (N2), and having a controllable switch (M1) arranged on the primary side, wherein the converter (3) can be supplied with a supply voltage converter (3); means (4) for directly or indirectly sensing the output voltage (Vout); and a control unit (ST) for controlling the switch (M1), wherein the secondary current (I2) through the secondary winding (N2) linearly drops, starting from a position value (I2max), which the switch (M1) is switched off, wherein the control unit (ST) is designed to adaptively sense a discharge duration (Tdischarge) between a switch-off of the switch (M1) and a subsequent drop in the secondary current (12) to zero in order to control the secondary current (I2).
    Type: Grant
    Filed: February 5, 2015
    Date of Patent: January 1, 2019
    Assignee: TRIDONIC GMBH & CO KG
    Inventors: Andre Mitterbacher, Paul Dalby, Deepak Makwana, Wayne Bell
  • Patent number: 10150372
    Abstract: Forms of the present disclosure include an input end, and an output end connected to the input end to improve a power factor through the input end. The output end includes non-electrolytic capacitors formed at both sides of an electrolytic capacitor for output, and first inductors formed between the respective non-electrolytic capacitors and the electrolytic capacitor. Therefore, forms of the present disclosure may reduce a ripple current (current stress) at a PFC output end through a CL circuit formed at a left side with respect to the electrolytic capacitor, and reduce an input ripple current (input current stress) of a DC-DC converter through an LC circuit formed at a right side.
    Type: Grant
    Filed: March 2, 2016
    Date of Patent: December 11, 2018
    Assignee: Hyundai Motor Company
    Inventors: Ho Tae Chun, Chang Han Jun, Jin Young Yang, Seung Hyun Han
  • Patent number: 10126870
    Abstract: Disclosed herein are techniques for reducing certain types of noise in capacitive sensing devices. The techniques generally comprise utilizing a low-pass filter in conjunction with a comb filter to “zero out” frequency components associated with certain types of noise. More specifically, the comb filter is configured to zero out noise associated with the fundamental frequency and harmonics of noise that approximates a square wave or an impulse train. The frequency of the sensing signal for capacitive sensing is chosen such that the comb filter does not zero out such frequency.
    Type: Grant
    Filed: September 30, 2014
    Date of Patent: November 13, 2018
    Inventor: Adam Schwartz
  • Patent number: 10075238
    Abstract: The present disclosure discloses methods and devices for an optical signal encoding and decoding. The optical signal encoding method includes: reading N-ary data bit by bit, and encoding the data into electric signal units: encoding each different digit in the N-ary data into a different electric signal unit, where high level duration and low level duration in the electric signal unit are Ti1, Ti2, . . . , and Tij respectively, i, j, and N are natural numbers, and the different electric signal units are separated by delimiters; and combining the electric signal units corresponding to the N-ary data into a drive signal, where the drive signal is used for being output in a light form. Instable flashing of emitted light of a terminal device is overcome effectively, and information transmission reliability is further improved.
    Type: Grant
    Filed: March 5, 2017
    Date of Patent: September 11, 2018
    Inventors: Ruopeng Liu, Xudong Wang, Weicheng Xu, Linyong Fan
  • Patent number: 10038366
    Abstract: A rectification circuit rectifies an alternating current voltage of an alternating current power supply. A parallel converter comprises converters that correspond to phases and that are connected in parallel to an output terminal of the rectification circuit. Each converter comprising a reactor, a switching circuit that is connected in series to the reactor and a diode that is connected in series to the reactor. A smoothing capacitor is connected to an output terminal of the parallel converter. A control circuit generates pulse signals corresponding to phases based on an error voltage between an output voltage of the smoothing capacitor and a reference voltage and on an output voltage of the rectification circuit, and switches the switching circuits in the converters using the pulse signals. Current detection circuits are provided corresponding to the converters and that detect currents flowing through the switching circuits.
    Type: Grant
    Filed: July 12, 2017
    Date of Patent: July 31, 2018
    Inventor: Hiromitsu Terui
  • Patent number: 9991801
    Abstract: An LLC converter includes an input having a first node and a second node. A first switch is coupled between the first node and a third node and a second switch is coupled between the third node and the second node. A transformer having a first transformer input is coupled to the third node. A resonant capacitor is coupled to a second transformer input and a first input of a summer. A voltage ramp generator is coupled to a second input of the summer, the summer for summing voltages at the first input and the second input. The converter further includes circuitry for generating control signals for the first switch and the second switch in response to the output of the summer.
    Type: Grant
    Filed: August 10, 2016
    Date of Patent: June 5, 2018
    Assignee: Texas Instruments Incorporated
    Inventors: Fan Wang, Timothy B. Merkin, Brent A. McDonald, Joseph Michael Leisten
  • Patent number: 9985474
    Abstract: Disclosed are a display apparatus and a power supplying method thereof. The display apparatus includes: a backlight driver configured to drive a backlight to emit light; a main power supply configured to detect connection of the backlight to the backlight driver and supply a voltage to the backlight driver in response to a control voltage; and a standby power supply configured to supply the control voltage to the main power supply, in response to determining the connection of the backlight to the backlight driver.
    Type: Grant
    Filed: July 9, 2015
    Date of Patent: May 29, 2018
    Inventors: Sang-Hoon Lee, Jeong-il Kang
  • Patent number: 9944413
    Abstract: Method and circuits for balancing a first waveform used to drive an LED are disclosed herein. The first waveform has a first cycle with a first amplitude and a second cycle with a second amplitude. An embodiment of the method includes adjusting the first amplitude of the first cycle to match the second amplitude of the second cycle, the result being a second waveform. The LED is driven with the second waveform.
    Type: Grant
    Filed: October 25, 2017
    Date of Patent: April 17, 2018
    Assignee: Texas Instruments Incorporated
    Inventors: Timothy Roy Sullivan, Daniel Ross Herrington
  • Patent number: 9937937
    Abstract: A light apparatus for use with a power source and a control switch, the control switch including an input node, an output node and at least first and second independently selectable current paths between the input and output nodes, the first selectable current path having a resistance value that is greater than the second current path, controlling light intensity as a function of which of the current path is selected, at least one light source, a controller linked to the control switch and determining the selected path and generating a control signal and a light driver linked between the output node and the light source, the driver receiving the control signal and adjusting the current applied to the light source as a function of the control signal.
    Type: Grant
    Filed: November 7, 2016
    Date of Patent: April 10, 2018
    Inventor: Kevin McWithey
  • Patent number: 9935556
    Abstract: A method for controlling a resonant converter includes maintaining an output current equal to an output power of the converter divided by an output voltage of the converter in response to a secondary current of a transformer being greater than or equal to a maximum output current. The output power is maintained at a constant output power in response to the output power being greater than or equal to a maximum output power, and the secondary current being less than the maximum output current. Maintaining the output current ratio and the constant output power each comprises changing the duty cycle of a primary-side switch configured to gate a primary current of the transformer. The output voltage is limited to a maximum output voltage in response to the secondary current being less than the maximum output current, and the output power being less than the maximum output power.
    Type: Grant
    Filed: January 27, 2017
    Date of Patent: April 3, 2018
    Inventors: Dibyendu Rana, Zhao-Jun Wang
  • Patent number: 9930305
    Abstract: A discharge lamp driving device includes a discharge lamp driving unit configured to supply a driving current to a discharge lamp, and a control unit configured to control the discharge lamp driving unit. The discharge lamp driving device is configured to provide a first hybrid period and a second hybrid period each alternately including a first AC period in which an AC current is supplied and a first DC period in which a DC current with a first polarity is supplied. The control unit, in the first hybrid period, is configured to change a ratio of length of the first DC period to length of the first AC period to be increased, and in the second hybrid period, is configured to change a ratio of the length of the first AC period to the length of the first DC period to be increased.
    Type: Grant
    Filed: March 30, 2017
    Date of Patent: March 27, 2018
    Inventor: Tomohiro Yokoo
  • Patent number: 9917524
    Abstract: Energy channelling AC-DC converters, methods, and control systems are provided.
    Type: Grant
    Filed: September 3, 2015
    Date of Patent: March 13, 2018
    Assignee: Queens' University at Kingston
    Inventors: Peng Fang, Yan-Fei Liu
  • Patent number: 9906137
    Abstract: AC to DC power electronic converter circuitry includes isolated converter circuitry and control circuitry coupled to the isolated converter circuitry. The isolated converter circuitry includes one or more wide bandgap switching components. The control circuitry is configured to drive at least one of the wide bandgap switching components such that the power electronic converter circuitry is configured to generate a DC output with an output power greater than 100W at an efficiency greater than 92%. Using wide bandgap components in the isolated converter circuitry allows the power electronic converter circuitry to achieve a high efficiency and high power density.
    Type: Grant
    Filed: September 23, 2014
    Date of Patent: February 27, 2018
    Assignee: Cree, Inc.
    Inventors: Adam Barkley, XueChao Liu, Marcelo Schupbach
  • Patent number: 9872719
    Abstract: The electrosurgical systems and methods according to the present disclosure use a multi-stage power converter for generating electrosurgical energy. The electrosurgical systems include an electrosurgical generator having a power converter coupled to an electrical energy source and configured to generate electrosurgical energy. The power converter includes a boost converter configured to convert a first direct current from the electrical energy source to a second direct current, and a phase-shifted pulse width modulation (PS-PWM) resonant inverter configured to invert the second direct current to an alternating current. The electrosurgical generator also includes a plurality of sensors configured to sense a voltage and a current of the generated electrosurgical energy and a controller coupled to the power converter and the plurality of sensors.
    Type: Grant
    Filed: February 13, 2014
    Date of Patent: January 23, 2018
    Assignee: COVIDIEN LP
    Inventor: Joshua H. Johnson
  • Patent number: 9844120
    Abstract: The present invention relates to a system, method, and apparatus for powering intelligent lighting networks. The power for the intelligent lighting network is supplied by Power-over-Ethernet (PoE) switches and/or Mid-Spans, which are conditioned by a powered device to distribute power tuned specifically for each, at least one light emitting diode (LED) fixture. The Power-over-Ethernet switch and/or Mid-Span with associated router and wireless access point can be used to communicate with, and power a sensor network that collects data relevant to the intelligent lighting network. Optionally, the Power-over-Ethernet switch and/or Mid-Span can be used to communicate with, and power a network of sensors that collects data relevant to the space the intelligent lighting network is operating in, or can be used to communicate with and power a network of AC wall plugs that can be turned on and off, and various switches, relays, and PLCs, RFID systems, USB hubs, etc.
    Type: Grant
    Filed: August 15, 2016
    Date of Patent: December 12, 2017
    Assignee: IDS-IP Holdings, LLC
    Inventors: David M. Snyder, Leslie D. Baych, Walter F. Emig, III
  • Patent number: 9797587
    Abstract: An electrical interface module (EIM) is provided between an LED illumination device and a light fixture. The EIM includes an arrangement of contacts that are adapted to be coupled to an LED illumination device and a second arrangement of contacts that are adapted to be coupled to the light fixture and may include a power converter. Additionally, an LED selection module may be included to selectively turn on or off LEDs. A communication port may be included to transmit information associated with the LED illumination device, such as identification, indication of lifetime, flux, etc. The lifetime of the LED illumination device may be measured and communicated, e.g., by an RF signal, IR signal, wired signal or by controlling the light output of the LED illumination device. An optic that is replaceably mounted to the LED illumination device may include, e.g., a flux sensor that is connected to the electrical interface.
    Type: Grant
    Filed: June 2, 2016
    Date of Patent: October 24, 2017
    Assignee: Xicato, Inc.
    Inventors: Gerard Harbers, Gregory W. Eng, Christopher R. Reed, Peter K. Tseng, John S. Yriberri
  • Patent number: 9742293
    Abstract: A power supply and a method of power supplying for converting an external alternating power into an output power with appropriate voltage and power are disclosed. The power supply includes an input charging unit, an input filtering unit, a regulating unit, a transformer, a controller, an output unit, an output capacitor, a switching unit and a feedback unit. The regulating unit is connected to the input filtering unit and comprises a regulating capacitor and a regulator connected in series. The regulator is controlled by the controller to perform one of the working modes including initial open circuit, power on conduction, short circuit normal operation and over-voltage open circuit protection. Therefore, the present invention overcomes the problem of inrush current upon powering on, and particularly, the controller performs digital operation with flexibility to meet actual requirements by updating appropriate firmware of software program.
    Type: Grant
    Filed: August 1, 2016
    Date of Patent: August 22, 2017
    Assignee: INNO-TECH CO., LTD.
    Inventors: Shu-Chia Lin, Chih-Liang Wang, Ching-Sheng Yu
  • Patent number: 9743467
    Abstract: The present invention relates to a driver device (60) for driving a load (12), in particular an LED unit comprising one or more LEDs, said driver device comprising input terminals (28, 30) for receiving an input voltage (V12) from an external power supply (16), output terminals for providing an output voltage to the load (12) for driving the load (12), a converter unit (34) for converting the input voltage (VI 2) to a converted voltage (VI 4) and for providing the converted voltage (VI 4) to internal connection elements (63, 64) of the driver device (60), a signal control device (62) for applying an electrical signal (I) to at least one of the connection elements (63, 64), and a detection circuit for detecting a phase angle of the input voltage (VI 2) by measuring a voltage drop of the converted voltage (VI 4) caused by the electrical signal (I).
    Type: Grant
    Filed: January 18, 2013
    Date of Patent: August 22, 2017
    Inventors: Dmytro Viktorovych Malyna, Patrick Alouisius Martina De Bruycker
  • Patent number: 9723689
    Abstract: Method of light intensity automatic regulation wherein after the device is connected to the power system parameters of minimum voltage values are set so that the electronic control system remains in standby mode, and the motion and dusk sensors are in standby mode, and those sensors are synchronized with the electronic control system, then to the electronic control system the value of input signal is entered which is generated by the motion sensor at which the operating cycle of the device is started, and also the value of the output signal generated by the dusk sensor whereupon voltage supplied to the light source increases, up to the maximum value, sources of light display 100% illumination intensity, the illumination time after which voltage supplied to the light source decreases to the minimum value as a result of which the source of light does not illuminate and the device goes into standby mode.
    Type: Grant
    Filed: March 3, 2011
    Date of Patent: August 1, 2017
    Assignee: LARS Co. Spolka z Organiczona Odpowiedzialnoscia
    Inventor: Krzysztof Wɭodzimierz Łagutko