With Power Factor Control Device Patents (Class 315/247)
  • 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
    Assignees: STMICROELECTRONICS (ROUSSET) SAS, STMICROELECTRONICS GMBH
    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
    Assignee: SYNAPTICS INCORPORATED
    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
    Assignee: KUANG-CHI INTELLIGENT PHOTONIC TECHNOLOGY LTD.
    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
    Assignee: SANKEN ELECTRIC CO., LTD.
    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
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    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
    Assignee: J.W. SPEAKER, CORPORATION
    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
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    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
    Assignee: SEIKO EPSON CORPORATION
    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: 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
    Assignee: PHILIPS LIGHTING HOLDING B.V.
    Inventors: Dmytro Viktorovych Malyna, Patrick Alouisius Martina De Bruycker
  • 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: 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
  • Patent number: 9714743
    Abstract: A retrofit light emitting diode (LED) lamp is provided for replacement of ballast driven fluorescent lamps. The retrofit LED lamp comprises a plurality of light emitting diodes. The plurality of light emitting diodes is mounted on a metal core printed circuit board (MCPCB). A PCB circuit is provided for driving the plurality of LEDs that further comprises a bridge rectifier made of a schottky diode.
    Type: Grant
    Filed: May 10, 2015
    Date of Patent: July 25, 2017
    Assignee: Lunera Lighting, Inc.
    Inventors: Don Barnetson, Peter Shen, Chris Miao
  • Patent number: 9699837
    Abstract: A driver port that provides selectable output currents based on connections thereto, and a driver including the same, is provided. A plurality of shunt resistors are connected in series between a negative output of a driver and a ground. A driver port having a plurality of connection points is provided, each respective connection point connected to a different connection between two of the plurality of shunt resistors. A load including one or more solid state light sources is capable of being connected between one of the connection points of the driver port and a positive output of the driver.
    Type: Grant
    Filed: June 24, 2014
    Date of Patent: July 4, 2017
    Assignee: OSRAM SYLVANIA Inc.
    Inventors: Nitin Kumar, Markus Ziegler, Naveen Tumula, Thomas Schalton
  • Patent number: 9674932
    Abstract: A dual sensor lighting controller has an AC input rectifier that includes an EMI filter, and an isolated AC-to-DC converter for 12 VDC and 5 VDC supplies, and a mechanical relay to control output AC Line voltage for the lighting device. The lighting controller also includes a motion PIR sensor, an internal photo sensor, an external photo sensor and an infrared receiver configured to receive signals from a remote control. The remote control is a handheld battery operated infrared remote control. Two wires provide 0-10 VDC dimming and a microcontroller preferably includes proprietary firmware controls. The microcontroller is connected to and reads PIR, internal or external photo sensors signals. The microcontroller has a clock that counts internal timing to control an output of the lighting device by a mechanical relay together with 0-10 VDC dimming control to save Electrical energy by activating or deactivating the output AC Line voltage.
    Type: Grant
    Filed: July 1, 2016
    Date of Patent: June 6, 2017
    Inventors: Tom O'Neil, Lee Chiang
  • Patent number: 9648680
    Abstract: Method and means for driving one or more LEDs. The method includes turning a power switch on to provide current through an inductor and the power switch, measuring voltseconds of the LEDs at a cycle time, comparing the measured voltseconds to a reference signal at an end of the cycle time, generating a signed discrete logical signal based on a difference between the measured voltseconds and the reference signal, and generating a control signal using the signed discrete logical signal to regulate a peak current through the power switch by keeping the cycle time voltseconds substantially constant. The reference signal may be proportional to a set average LED voltage.
    Type: Grant
    Filed: February 26, 2016
    Date of Patent: May 9, 2017
    Assignee: Chemtron Research LLC
    Inventors: Anatoly Shteynberg, Harry Rodriguez
  • Patent number: 9621062
    Abstract: An apparatus may include a dimmer output voltage emulator for causing a power converter interface circuit to draw current from a capacitor in the power converter interface during a period of time when a dimmer coupled to the power converter interface circuit is non-conducting to generate an emulated dimmer output voltage. The emulated dimmer output voltage may emulate part of a cycle of a non-zero AC dimmer output voltage of the dimmer after a triac of the dimmer prematurely stops conducting that would occur if the triac continued conducting during the part of the cycle. The dimmer output voltage emulator may include a pull-down circuit to pull down current of the interface circuit and generally decrease the emulated dimmer output voltage during a first period of time and a hold circuit to maintain the emulated dimmer output voltage below a substantially non-zero threshold value during a second period of time.
    Type: Grant
    Filed: March 7, 2014
    Date of Patent: April 11, 2017
    Assignee: PHILIPS LIGHTING HOLDING B.V.
    Inventor: John L. Melanson
  • Patent number: 9622316
    Abstract: Thermal management and control techniques for light emitting diode and other incandescent replacement light technologies using a current controller are disclosed.
    Type: Grant
    Filed: April 30, 2015
    Date of Patent: April 11, 2017
    Assignee: TerraLUX, Inc.
    Inventors: Anthony Catalano, Daniel Harrison, John J. Hall
  • Patent number: 9615437
    Abstract: An apparatus and method for operating a light generator (2) with a voltage source (4) makes possible a simple and reliable determination of the light generator's condition. The apparatus provides (a) a device (5; 13) for generating a measurement voltage the voltage present at ale light generator (2), (b) device (6, 9) for generating a first and a second comparison voltage, each proportional to the current flowing through the light generator (2), (c) a device (9, 8) for forming a difference voltage from the measurement voltage and one comparison voltage and a summation voltage from the measurement voltage and the other comparison voltage, (d) two capacitive rectifiers (7) for rectifying the difference voltage and the summation voltage, and (e) a controller (3), by which the rectified difference voltage and the rectified summation voltage can be evaluated.
    Type: Grant
    Filed: April 17, 2015
    Date of Patent: April 4, 2017
    Assignee: IIE GmbH & CO. KG
    Inventor: Ekkehard Kress
  • Patent number: 9597964
    Abstract: A device for compensating ripples in the output voltage of a PFC converter and a battery charging device for an electric vehicle are disclosed. The disclosed device for compensating the ripples included in the output voltage of a PFC converter includes: a first switching element having one end connected with an output terminal that is not connected with a ground from among two output terminals forming an output end of the PFC converter; a second switching element having one end connected with the other end of the first switching element and having the other end connected with a ground; a compensation inductor having one end connected with the other end of the first switching element and with one end of the second switching element; and a compensation capacitor having one end connected with the other end of the compensation inductor and having the other end connected with a ground.
    Type: Grant
    Filed: October 30, 2013
    Date of Patent: March 21, 2017
    Assignee: Myongji University Industry and Academia Cooperation Foundation
    Inventors: Jun-Young Lee, Gwang-Min Yoo, Won-Yong Kim
  • Patent number: 9578707
    Abstract: A lighting system includes: a demand controller which outputs a demand signal; a control panel which suspends supply of power from a power line for a first predetermined time period by controlling switches based on the demand signal; and a light fixture which includes a light emitter, a detector, an occupancy sensor, and a controller which, if the detector detects that the power being supplied to the light fixture emitting light in a first illumination state is suspended for the first predetermined time period: causes the light fixture to emit light in a second illumination state dimmer than the first illumination state if the occupancy sensor has sensed a person; and causes the light emitter to emit light in a third illumination state dimmer than the second illumination state if the occupancy sensor has sensed no one.
    Type: Grant
    Filed: March 25, 2016
    Date of Patent: February 21, 2017
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventor: Shigemi Fushimi
  • Patent number: 9578727
    Abstract: Provided are circuits and methods for a digital controller for an electronic ballast for a fluorescent lamp, comprising a feed-forward loop that provides information about a voltage firing angle, and a pulse width modulator that controls a duty ratio of at least one power switch of the electronic ballast according to the information. The digital controller may include a duty ratio controller implemented in the pulse width modulator. The digital controller may include one or more functions such as dimming, maintaining high power factor throughout the dimming range, low lamp power detection, lamp soft-start, and DC-link capacitor over-voltage detection for end of life protection or lamp failure protection. In one embodiment the ballast is a single stage, single switch ballast.
    Type: Grant
    Filed: February 6, 2014
    Date of Patent: February 21, 2017
    Inventors: John Lam, Praveen Jain
  • Patent number: 9564828
    Abstract: Techniques for supplying auxiliary power to AC powered lighting devices are disclosed. An auxiliary power supply can be used, for example, to provide auxiliary power to lighting control circuitry, an LED driver, or any other electronic lighting device. In some example embodiments, the linear regulator is connected to a switch that is controlled by a control circuit such that the linear regulator operates only when the instantaneous line input voltage is in a certain range where the linear regulator has a somewhat good efficiency. In such cases, when the linear regulator is operating, energy is stored with an auxiliary capacitor connected to the output of the linear regulator. In some embodiments, the linear regulator is configured to operate only when the line voltage is between a determined upper and lower voltage threshold; while in other cases the linear regulator is configured to operate only when the line voltage is increasing through the predetermined voltage threshold values.
    Type: Grant
    Filed: January 21, 2013
    Date of Patent: February 7, 2017
    Assignee: OSRAM SYLVANIA Inc.
    Inventor: Bernhard Siessegger
  • Patent number: 9544951
    Abstract: An LED driver comprising a first stage, wherein the first stage converts AC power from an AC power source into a DC power source. A second stage receiving the DC power source from the first stage and further comprising: a second stage step-down buck converter with a constant current output that receives power from the DC power source; and a second stage intelligent step-down LED driver chip that runs a step down buck converter that produces the constant current output to the external LED load. A companion microcontroller controls a second stage intelligent step down LED driver chip. The companion microcontroller provides programmable features for a user, wherein the programmable features provide user programmable variables to reprogram the LED Driver to alter default variables.
    Type: Grant
    Filed: July 29, 2015
    Date of Patent: January 10, 2017
    Inventors: Tom O'Neil, Lee Chiang
  • Patent number: 9544976
    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: January 25, 2016
    Date of Patent: January 10, 2017
    Assignee: IDS-IP HOLDINGS LLC
    Inventors: David M. Snyder, Leslie D. Baych, Walter F. Emig
  • Patent number: 9531281
    Abstract: In one embodiment, an AC-DC power converter can include: (i) a rectifier bridge and filter to convert an external AC voltage to a DC input voltage; (ii) a first energy storage element to store energy from the DC input voltage via a first current through a first conductive path when in a first operation mode; (iii) a second energy storage element configured to store energy from a second DC voltage via a second current through a second conductive path when in the first operation mode; (iv) a transistor configured to share the first and second conductive paths; (v) the first energy storage element releasing energy to a third energy storage element and a load through a third conductive path when in a second operation mode; and (vi) the second energy storage element releasing energy to the load through a fourth conductive path during the second operation mode.
    Type: Grant
    Filed: August 12, 2015
    Date of Patent: December 27, 2016
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Jian Deng, Chen Zhao
  • Patent number: 9510403
    Abstract: A two-stage light emitting diode (LED) driver for powering an LED load at a substantially constant current, and related methods and systems. The first or front end stage of the LED driver includes a buck topology power factor correction (PFC) circuit, the buck PFC circuit and a PFC controller. The second stage of the LED driver includes a conventional isolation and regulator circuit configured to receive the DC voltage and DC current output by the buck PFC and then to provide the substantially constant current to the LED load. By multiplying the rectified input voltage sensed by the PFC controller, the input AC current drawn by the buck PFC circuit has a much improved total harmonic distortion (THD), which is achievable without the need for using an expensive PFC controller. The rectified input voltage is multiplied using a Zener diode ladder.
    Type: Grant
    Filed: October 1, 2013
    Date of Patent: November 29, 2016
    Assignee: GENERAL ELECTRIC COMPANY
    Inventor: Yehuda Daniel Levy
  • Patent number: 9490695
    Abstract: Aspects of the disclosure provide a circuit that includes a switch control circuit and a timing control circuit. The switch control circuit is configured to enable/disable a pulse width modulation (PWM) switch control to a regulator to transfer power to a load. The timing control circuit is configured to enable an analog to digital converter (ADC) to convert an analog signal to a digital stream when the PWM switch control is disabled in order to reduce noise in the digital stream due to switching activities in the regulator.
    Type: Grant
    Filed: September 3, 2013
    Date of Patent: November 8, 2016
    Assignee: Marvell International Ltd.
    Inventors: Sai Bun Wong, Lionel Barrow, Sofjan Goenawan, Gary Chen, Jerry Su, Wanfeng Zhang
  • Patent number: 9485842
    Abstract: A lighting system includes a lighting fixture, a demand controller and a control board. The demand controller obtains power usage of a plurality of devices including the lighting fixture and, outputs a demand signal depending on the power usage obtained. The control board includes a switch provided on a power line and a switch controller that interrupts supply of power over the power line for a predetermined period of time by controlling the switch based on the output demand signal. The lighting fixture includes a light emitter, a detector, and a controller that causes the light emitter to emit light in a second dimming state darker than a first dimming state in which the light emitter emitted light immediately before the detection, if the detector detects that the supply of power has been interrupted for the predetermined period of time.
    Type: Grant
    Filed: December 7, 2015
    Date of Patent: November 1, 2016
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Kazuyoshi Kadotani, Hajime Koide
  • Patent number: 9468056
    Abstract: A light source for a color display apparatus (1) for displaying light at optical wavelengths corresponding a plurality of different colors sequentially, comprising a plurality of light-emitting diodes (3, 4, 5) each respectively operable to emit light to display a respective one of the plurality of different colors, a power source (26) connected to the plurality of LEDs for supplying power thereto a plurality of capacitor units (7, 8, 9) connected to the power source to be provided thereby with charge for generating a respective one of a plurality of different respective forward bias voltages for application to the LEDs to operate the LED. A control unit (10) is operable to selectively connect a capacitor unit to an LED for applying a desired one of the different said forward bias voltages thereto according to the color of light which the LED is operable to display.
    Type: Grant
    Filed: July 7, 2014
    Date of Patent: October 11, 2016
    Assignee: BAE SYSTEMS plc
    Inventors: Keith Barnett, Peter John Smith, Tom Cronin
  • Patent number: 9420649
    Abstract: A driver circuit for switching switch according to capacitor voltage is disclosed in the present invention. The driver circuit is provided to drive a load circuit which includes a load resistor under a continuous conduction mode (CCM). In the driver circuit, a first current module which electrically connected to the load resistor is provided to generate a variable current. A second current module which electrically connected to the first switch and the first current module is provided to generate a constant current. A processing module is electrically connected to the first capacitor, the second capacitor and a gate of the first and the second switch. The processing module is provided to conduct one of the first switch and the second switch according to a size of the variable current and the constant current, a voltage of the first capacitor, and a voltage of the second capacitor.
    Type: Grant
    Filed: August 11, 2015
    Date of Patent: August 16, 2016
    Assignee: Feeling Technology Corp.
    Inventor: Yi-Sheng Chen
  • Patent number: 9401651
    Abstract: A transformer sub-circuit for use in an electrically operated vehicle includes a bridge circuit which has at least four MOSFETs and capacitors connected in parallel with the MOSFETs, and an inductor connected to the bridge circuit for use as a primary side of a transformer. A control device or controller for the inverter is configured to cause switching of the MOSFETs in such a way that operation is performed at a frequency that is higher than the resonance frequency.
    Type: Grant
    Filed: July 23, 2012
    Date of Patent: July 26, 2016
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventor: Thomas Komma
  • Patent number: 9392660
    Abstract: An illumination device and method is provided herein for calibrating individual LEDs and photodetector(s) included within the illumination device, so as to obtain a desired luminous flux and a desired chromaticity of the device over time as the LEDs age. Specifically, a calibration method is provided herein for characterizing each emission LED and each photodetector separately. The wavelength and intensity of the illumination produced by each emission LED is accurately characterized over a plurality of different drive currents and ambient temperatures, and at least a subset of the wavelength and intensity measurement values are stored with a storage medium of the illumination device for each emission LED. The responsivity of the photodetector is accurately characterized over emitter wavelength and photodetector junction temperature, and results of said characterization are stored with the storage medium.
    Type: Grant
    Filed: August 28, 2014
    Date of Patent: July 12, 2016
    Assignee: Ketra, Inc.
    Inventors: Alcides Jose Dias, Jason E. Lewis
  • Patent number: 9385598
    Abstract: A low voltage lamp includes a boost converter stage and a load. The load may include low voltage light producing elements including low voltage light emitting diodes. The boost converter stage receives an electronic transformer output and includes an inductor coupled to a switch and a switch controller that receives one or more controller inputs. Inductor current may be returned to the transformer when the switch is closed and provided to a rectifier coupled to the load when the switch is open. Controller inputs may include a transformer input that receives the transformer output, a sense input indicating switch current, and a load input indicating load voltage. Controller logic may synchronize assertions of a control signal for the switch with edge transitions of the transformer output to maintain peak inductor current within a specified range and to selectively transfer stored energy in the inductor to the load or back to the transformer.
    Type: Grant
    Filed: June 12, 2014
    Date of Patent: July 5, 2016
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Kan Wang, Michael A. Kost, Eric J. King, John L. Melanson, James P. McFarland
  • Patent number: 9380655
    Abstract: A single-stage AC-DC power converter for powering a load at a substantially constant current, and related methods and systems. The AC-DC power converter includes a high power factor correction (PFC) circuit configured in a flyback topology and operating in transition mode. The flyback PFC circuit outputs a direct current (DC) voltage and a DC current. The PFC circuit further includes a flyback transformer and a switch circuit that selectably toggles the substantially constant output current provided to the load between a first and a second, preset constant current. The secondary windings of the flyback transformer are split into two sections, and the switch circuit toggles the two sections of the secondary windings between a series and a parallel configuration to provide the first and second, preset constant currents. The switch circuit includes a switch and three, fast Schottky diodes.
    Type: Grant
    Filed: October 1, 2013
    Date of Patent: June 28, 2016
    Assignee: GENERAL ELECTRIC COMPANY
    Inventor: Yehuda Daniel Levy
  • Patent number: 9351370
    Abstract: An LED (Light Emitting Diode) controller comprises a first LED driver to generate a first PWM (Pulse Width Modulation) drive signal to turn on or turn off, respectively, a first current through a first LED string. Additionally, the LED controller comprises a compensation circuit to generate the first PWM drive signal responsive to a first duty set signals. The first duty set signal is indicative of a first duty cycle set for the first PWM drive signal. The compensation circuit receives a first feedback signal indicative of the first current, generates a first error signal indicative of a difference between a first predetermined target value and the first feedback signal, and generates the first PWM drive signal to have the first duty cycle corresponding to the first duty set signal and further adjusted by the first error signal.
    Type: Grant
    Filed: September 12, 2014
    Date of Patent: May 24, 2016
    Assignee: Dialog Semiconductor Inc.
    Inventors: Andrey B. Malinin, Enzhu Liang, Yuwen Wang