Plural Discharge Devices And/or Rectifiers In The Supply Circuit Patents (Class 315/205)
  • Patent number: 10398004
    Abstract: Circuitry 31 for a solid-state lighting arrangement 20 designed for as a replacement for a gas discharge lamp used in a lighting fixture having a ballast. The circuitry 31 unsafe flow of current through the solid-state lighting arrangement 20, under non-operational conditions and during installation of the lighting arrangement, so as to provide compatibility with safety standards for use with discharge lamps.
    Type: Grant
    Filed: July 6, 2018
    Date of Patent: August 27, 2019
    Assignee: ELB ELECTRONICS, INC.
    Inventor: Xiaoxiang Cheng
  • Patent number: 10367371
    Abstract: An intelligent charging system comprises a first switching element, a phase detecting device, a current detecting device and a controller. The first switching element is turned on or off based on a first control signal. The phase detecting device is configured to determine an allowable phase time interval of a phase of a power source. The current detecting device is connected to the first switching element. The current detecting device is configured to detect a first turned on time point when the first switching element is turned on. The controller is connected to the phase detecting device and the current detecting device. The controller is configured to determine whether the first turned on time point is within the allowable phase time interval. If the first turned on time point is not within the allowable phase time interval, the controller resets a first control parameter of the first control signal.
    Type: Grant
    Filed: July 10, 2017
    Date of Patent: July 30, 2019
    Assignee: AVER INFORMATION INC.
    Inventors: Chi-Fa Hsu, Chao-Hung Chang, Lien-Kai Chou
  • Patent number: 10282015
    Abstract: A touch screen comprising a piezoelectric induction layer and an electric power collecting unit, wherein: the piezoelectric induction layer is configured to induct an external force to generate electric signals, and transmit the electric signals to the electric power collecting unit; and the electric power collecting unit is configured to process the electric signals and store electric power under driving of the electric signals. Thereby the problem of insufficient electric power of electronic device usually happened in being used is solved. A display screen, a display device and a method for storing electric power by using the display screen are further provided.
    Type: Grant
    Filed: September 22, 2016
    Date of Patent: May 7, 2019
    Assignees: BOE TECHNOLOGY GROUP CO., LTD., HEFEI XINSHENG OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventor: Xiaoliang Cheng
  • Patent number: 10237930
    Abstract: Power supplies (1) comprise first induction circuits (11) for receiving first amounts of power from source circuits, second induction circuits (12) for providing second amounts of power to combinations (2) of light circuits (21) and capacitor circuits (22), control circuits (13) for controlling the second amounts, and trigger circuits (14) for bringing the control circuits (13) into first modes having first durations equal to time-intervals. The control circuits (13) in the first modes guide supplying current signals for supplying the combinations (2) and subsequently discharging current signals for reducing charges of the capacitor circuits (22) and in second modes prevent the flowing of the discharging current signals. The light circuits (21) experience low output levels without experiencing low frequency ripples. The control circuits (3) may comprise parallel combinations of transistors (15) such as field effect transistors and diodes (16) such as parasitic-reverse-diodes of the field effect transistors.
    Type: Grant
    Filed: December 18, 2015
    Date of Patent: March 19, 2019
    Assignee: PHILIPS LIGHTING HOLDING B.V.
    Inventor: Bernardus Arnoldus Gerardus Jongerius
  • Patent number: 10148168
    Abstract: A power supply circuit includes: an anti-electromagnetic interference circuit configured to receive input alternating current power and to output filtered alternating current power; a rectifier circuit configured to rectify the filtered alternating current power; a current correction circuit configured to perform passive power factor correction on the rectified alternating current power; a single-ended flyback converter circuit coupled to the output of the current correction circuit; and a dimming control circuit coupled between the output of the single-ended flyback converter circuit and a light load, wherein the current correction circuit is configured to control a waveform of the rectified alternating current power to follow a current output to the light load in order to provide passive power factor correction.
    Type: Grant
    Filed: July 18, 2017
    Date of Patent: December 4, 2018
    Assignee: Gardenia Industrial Limited
    Inventor: Bo Gao
  • Patent number: 10104737
    Abstract: The present disclosure provides a dimmer control circuit, a dimmer control method and a lighting device. The dimmer control circuit includes: a dimming output end configured to connect to a dimmer, a load terminal configured to connect to a load, a detection-control module, and a current holding module. An input end of the detection-control module is connected to an output end of the dimmer. An output end of the detection-control module is configured to: control the current holding module to connect to the load terminal when the dimming output end is connected to a SCR-based leading-edge phase cut dimmer, and control the current holding module to disconnect from the load terminal when the dimming output end is not connected to the SCR-based leading-edge phase cut dimmer. The current holding module is configured to supply a holding current to the SCR-based leading-edge phase cut dimmer connected to the dimming output end.
    Type: Grant
    Filed: November 2, 2016
    Date of Patent: October 16, 2018
    Assignee: SENGLED CO., LTD.
    Inventors: Junshan Lou, Zhenfeng Ding, Jinxiang Shen
  • Patent number: 10008933
    Abstract: The amount of power being output to the load is sensed by sampling the frequency of the pulse width modulation signal that is controlling the switch that is providing the power to the load. If the pulse width modulation signal has a high frequency, then it will be providing higher power to the load. As the power drawn by the load decreases, the frequency of the pulse width modulation power supply signal will decrease. By sensing and periodically sampling the frequency of the pulse width modulation signal that is providing power, the demand of the load can be quickly and accurately determined. As the power demand of the load decreases, the peak current that the power supply switch can provide also decreases. The permitted peak current dynamically changes to adapt to the power drawn by the load.
    Type: Grant
    Filed: December 16, 2016
    Date of Patent: June 26, 2018
    Assignee: STMICROELECTRONICS ASIA PACIFIC PTE LTD
    Inventor: Kong Yin Leong
  • Patent number: 9781805
    Abstract: An LED tube lamp includes a lamp tube, having a first pin and a second pin for receiving an external driving signal; a first rectifying circuit for rectifying the external driving signal; a filtering circuit for producing a filtered signal; an LED lighting module configured for emitting light; and a ballast-compatible circuit, coupled to the first rectifying circuit, and containing a metallic electrode, a bimetallic strip, and a heating filament in an inert gas. A spacing is configured between the bimetallic strip and the metallic electrode, and the bimetallic strip includes two metallic strips with different temperature coefficients. When the external driving signal is initially input at the first pin and second pin, the ballast-compatible circuit will be in an open-circuit state, until entering a conduction state, which allows a current to flow through the LED lighting module thus allowing the LED tube lamp to emit light.
    Type: Grant
    Filed: February 28, 2016
    Date of Patent: October 3, 2017
    Assignee: Jiaxing Super Lighting Electric Appliance Co., Ltd.
    Inventors: Aiming Xiong, Qifeng Ye, Yueqiang Zhang
  • Patent number: 9544970
    Abstract: The invention relates to an LED module (1), comprising: connections (2) for an LED array (3); a circuit (4) which is configured to constitute a load, preferably an effective power load, if during a starting phase a constant current or a constant voltage is applied to the LED module (1), and which is configured not to constitute a load when the starting phase has finished, wherein the circuit (4) is designed to constitute a variable-current load which effects a change in the power consumption of the LED module (1) according to at least one predetermined protocol effected.
    Type: Grant
    Filed: December 20, 2013
    Date of Patent: January 10, 2017
    Assignee: TRIDONIC GMBH & CO KG
    Inventors: Matthias Dunser, Jurgen Fink, Thomas Ondrisek, Klaus Mundle, Gunter Marent, Andre Mitterbacher
  • Patent number: 9535443
    Abstract: A middle phase power-fetching type phase front/phase tail synchronized modulation circuit, comprising: a power supply unit, that is used to fetch power from the middle phase of an ordinary AC voltage waveform, and supplies it to a phase front/phase tail modulation unit as a normal operating voltage after rectification; and a phase front/phase tail modulation unit, it includes an MCU microcomputer, to control a driving circuit to turn-on, and control synchronously at least two bi-directional electronic power element, to generate a phase front/phase tail turn-on modulation signal. As such, while performing synchronous modulation from phase middle, phase front/phase tail can be retracted inward or expanded outward at the same time, so that phase front/phase tail turn-on output voltage average values complement each other, hereby achieving stable and modulated power supply.
    Type: Grant
    Filed: June 15, 2015
    Date of Patent: January 3, 2017
    Assignee: Loong Yee Industrial Corp., Ltd.
    Inventor: Chi-Jen Wang
  • Patent number: 9400298
    Abstract: A capacitive sensor includes a switching capacitor circuit, a comparator, and a charge dissipation circuit. The switching capacitor circuit reciprocally couples a sensing capacitor in series with a modulation capacitor during a first switching phase and discharges the sensing capacitor during a second switching phase. The comparator is coupled to compare a voltage potential on the modulation capacitor to a reference and to generate a modulation signal in response. The charge dissipation circuit is coupled to the modulation capacitor to selectively discharge the modulation capacitor in response to the modulation signal.
    Type: Grant
    Filed: January 3, 2012
    Date of Patent: July 26, 2016
    Assignee: Cypress Semiconductor Corporation
    Inventors: Viktor Kremin, Andriy Ryshtun
  • Patent number: 9312750
    Abstract: A high-frequency ac-dc power converter takes an input ac signal and converts it to an output dc signal. The converter has at least two front-end rectifier diodes arranged as a full wave rectifier of the input ac signal. A first inductor positioned at the output of the full wave rectifier. An output capacitor is connected across a load for the converter. There are at least one additional inductor and one additional capacitor. A switching circuit selectively forms different (LC) resonant circuits with the inductors and capacitors during a cycle of the input ac signal to form a dc-dc power converter.
    Type: Grant
    Filed: January 22, 2014
    Date of Patent: April 12, 2016
    Assignee: THE UNIVERSITY OF HONG KONG
    Inventors: Lee Chi Kwan, Sitthisak Kiratipongvoot
  • Patent number: 9231485
    Abstract: A power supply may include a driving power supply unit converting input power to supply driving power to a load, and a power supply control unit performing a control to detect a change in a voltage level of the driving power and cut off the input power when the detected voltage level of the driving power is equal to or more than a preset voltage level, in a preset standby mode.
    Type: Grant
    Filed: December 24, 2014
    Date of Patent: January 5, 2016
    Assignee: Samsung Electro-Mechanics Co., Ltd
    Inventors: Byoung Woo Ryu, Tae Seok Ko
  • Publication number: 20150145428
    Abstract: A compact fluorescent lamp (CFL) ballast driver includes first, second and neutral AC voltage terminals, a full wave rectifier between the first AC voltage terminal and the neutral AC input terminal, and a separate branch between the second AC voltage terminal and the neutral AC input terminal. A resonator circuit includes at least two inductors and provides its output voltage to a CFL lamp. The driver includes a first state detector circuit to monitor the first AC voltage terminal, and a second state detector circuit to monitor the second AC voltage terminal. The first and second state detector circuits activate respective first and second switches. The first switch shunts one inductor of the resonator circuit, and the second switch shunts another inductor of the resonator circuit. The driver can be housed in a CFL having a capper, a three-way lamp base adjacent to the capper and an arc tube.
    Type: Application
    Filed: November 25, 2013
    Publication date: May 28, 2015
    Inventors: Jácint GERGELY, Gábor SZABÓ, Lorând Lehel TÓTH, Lajos CSIBI, Tamás VÁSÁRHELYI
  • Publication number: 20150137694
    Abstract: The present invention discloses a power supply circuit for driving an LED lamp and a power supply method. The power supply circuit is constituted by an AC-DC converter by adopting DCM-DCM. Also, the power supply circuit adopts a valley fill circuit to reduce rippling of output current and adopts the DCM-DCM to stabilize a link voltage, thereby realizing a power factor correction circuit having two-stage structures. Thus, an input voltage of the flyback converter may be improved, and a high reverse voltage may be applied.
    Type: Application
    Filed: May 31, 2013
    Publication date: May 21, 2015
    Inventors: Ju Pyo Hong, Jun Ho Kim
  • Publication number: 20150123554
    Abstract: Constant current regulator (10) for supplying a series circuit (9) of a lighting installation with an output electrical power corresponding to a predetermined output power, comprising a plurality of modules (13) electrically connectable for simultaneous operation to jointly provide the output power, the modules being each configured for providing a module output power contributing to the output power of the regulator. Each module comprises its proper transformer (135) for providing galvanic insulation as required by local standards, and a microcontroller (231) for controlling operation of the module.
    Type: Application
    Filed: June 26, 2013
    Publication date: May 7, 2015
    Applicant: ADB BVBA
    Inventors: Lorenzo Dellacorna, Federico Canetta
  • Publication number: 20150102742
    Abstract: In one embodiment, a method of controlling dimming can include: (i) generating a dimming signal according to a DC input voltage signal; (ii) generating a voltage average value signal from the dimming signal; (iii) determining whether the dimming signal is in a positive half cycle or a negative half cycle; (iv) comparing the voltage average value signal against an output current feedback signal to generate a first comparison signal, and output a driving signal according to the first comparison signal when the dimming signal is in the positive half cycle; and (v) comparing the voltage average value signal against the output current feedback signal to generate a second comparison signal, and output the driving signal according to the second comparison signal when the dimming signal is in the negative half cycle.
    Type: Application
    Filed: October 2, 2014
    Publication date: April 16, 2015
    Inventors: Jian Deng, Xiaodong Huang
  • Publication number: 20150091465
    Abstract: A power supply circuit includes a rectifying circuit, a power-factor improving circuit, a bridge circuit, a transformer, a rectifying and smoothing circuit, first and second drivers, a power supply section, and a control section. The rectifying circuit converts an alternating-current input voltage into a rectified voltage. The power-factor improving circuit improves a power factor of the rectified voltage and converts the rectified voltage into a direct-current voltage. The bridge circuit converts the direct-current voltage into an alternating-current voltage. The rectifying and smoothing circuit converts the alternating-current voltage into a direct-current output voltage. The first driver controls a switching element. The second driver controls the power-factor improving circuit. The power supply section converts the direct-current voltage into a driving voltage corresponding to the first and second drivers.
    Type: Application
    Filed: February 25, 2014
    Publication date: April 2, 2015
    Applicant: TOSHIBA LIGHTING & TECHNOLOGY CORPORATION
    Inventors: Go Kato, Shinichiro Matsumoto
  • Publication number: 20150077005
    Abstract: An LED bulb is described, comprising LEDs within a shell and a driver circuit to operate the LEDs at a plurality of brightness levels. The driver circuit comprises first and second inputs to receive AC, a neutral input, a converter circuit, first and second rectifier circuits, a detector circuit, and a processing circuit. The first rectifier circuit is connected to the first and neutral inputs and rectifies the AC received. The second rectifier circuit is connected to the second and neutral inputs and rectifies the AC received. The detector circuit is connected to the first and second rectifier circuits. The processing circuit has a first and a second processor input, and is connected to the detector circuit. The processing circuit produces a chop signal with a duty cycle based on whether the first or second input is hot. The converter circuit powers the LEDs based on the chop signal.
    Type: Application
    Filed: November 24, 2014
    Publication date: March 19, 2015
    Inventor: Rolf WENDT
  • Publication number: 20150022104
    Abstract: Provided is a lighting apparatus using LEDs (light-emitting diodes having improved flicker performance. In general, in a direct-drive LED lighting apparatuses of the related art which use no switching-mode power supply (SMPS), percent flicker (hereinafter referred to as “% F”) is 100%. In contrast, the % F of the LED lighting apparatus having improved flicker performance according to the present invention is 40% or less that is equivalent to the % F of fluorescent lamps using a magnetic ballast.
    Type: Application
    Filed: January 31, 2013
    Publication date: January 22, 2015
    Inventor: Don Won Lee
  • Publication number: 20150022100
    Abstract: The invention is provided with an LED driving device and the control method. The driving device includes power converter, microprocessor and LED circuit. Wherein the power converter includes impulse transformer and switch control circuit. Primary winding at input side of the impulse transformer connects with rectifier filter circuit by the switch control circuit. Secondary winding at output side and auxiliary winding connect with power end of the microprocessor by constant voltage control switch. Output end of the microprocessor connects with LED circuit. The LED driving device and the control method provided by this invention collects on/off signal of mechanical lamp by using switch control circuit. Light is adjusted by LED circuit driven by the microprocessor, and thus heat elimination effect is improved, power consumption is lowered and brightness is enhanced.
    Type: Application
    Filed: March 30, 2012
    Publication date: January 22, 2015
    Inventors: Hong Zhang, Xiaobin Gu, Xiaoming Wu, Laijian Chen, Wei Cheng, Hanniu Gong
  • Patent number: 8937432
    Abstract: To allow a direct connection of a light source to a 230V/50 Hz or 120V/60 Hz AC network and to ensure safe operation and easy adaptation to user requirements when mounting, the light source includes a series connection which is connected to a bridge rectifier (GL) and includes at least two LED arrays strands, which have several interconnected individual LEDs, and a pre-resistor, which are arranged on a plate-like, electrically contacting carrier that dissipates heat, has protection against contact and carries the at least two array-LED-strands. For direct operation in an AC voltage supply, the sum of the flow voltages of the LED arrays (U1 . . . Un) is dimensioned such that it is equivalent to at least 75%, preferably 80% and a maximum of 85% of the amplitude of the rectified AC voltage at the nominal voltage, and that the array-LED-strand will be conductive if crossing the sum of flow voltages.
    Type: Grant
    Filed: February 22, 2011
    Date of Patent: January 20, 2015
    Assignee: Integrated Micro-Electronics Bulgaria
    Inventor: Holger Enke
  • Publication number: 20150015154
    Abstract: A light-emitting diode (LED) light tube driving circuit includes a LED driver and a rectifier unit. The LED driver is configured for receiving an operating voltage to drive at least one LED. The rectifier unit has a first input/output terminal and a second input/output terminal and is electrically coupled to an external alternating-current power source selectively by the first input/output terminal and the second input/output terminal. The rectifier unit is configured for providing the operating voltage to the LED driver. The rectifier unit further includes a first rectifier diode and a second rectifier diode.
    Type: Application
    Filed: January 23, 2014
    Publication date: January 15, 2015
    Applicant: Lextar Electronics Corporation
    Inventors: Chun-Kuang CHEN, Po-Shen CHEN
  • Patent number: 8933637
    Abstract: In one embodiment, an AC/DC power converter can include: a rectifier bridge and a filter capacitor for converting an external AC voltage to a half-sinusoid DC input voltage; a first storage component, where during each switching cycle in a first operation mode, a first path receives the half-sinusoid DC input voltage to store energy in the first storage component, and a first current through the first storage component increases; a second storage component, where a second path receives a second DC voltage to store energy in the second storage component, and a second current through the second storage component increases; and a third storage component, where in a second operation mode, the first current decreases to release energy from the first to the third storage component, where the second DC voltage includes a voltage across the third storage component through a third path.
    Type: Grant
    Filed: February 11, 2013
    Date of Patent: January 13, 2015
    Assignee: Silergy Semiconductor Technology (Hangzhou) Ltd.
    Inventors: Jian Deng, Binbin Li
  • Publication number: 20140361703
    Abstract: A method and apparatus for light emitting diode (LED) lighting power conversion including a full bridge rectifier circuit coupled to a first half-bridge rectifier circuit and a resonant tank circuit supplying AC power to a LED circuit and forming a first port to the LED circuit. The apparatus further includes a second half-bridge rectifier circuit and energy storage device receiving and supplying DC power to the LED circuit as determined by a controller to form a second port of the LED circuit, wherein the LED circuit further comprises a rectifier circuit for the LED circuit, and at least one LED.
    Type: Application
    Filed: May 30, 2014
    Publication date: December 11, 2014
    Applicant: Enphase Energy, Inc.
    Inventors: Martin Fornage, Michael Harrison
  • Patent number: 8901843
    Abstract: A light driving apparatus includes a first rectifying unit for receiving AC power and rectifying the AC power into DC, a switching element controlled to turn on or off by a control signal, a transforming unit having a transformer and an inductor connected to a primary side of the transformer in parallel, a second rectifying unit for rectifying a secondary side output of the transforming unit and supplying an output voltage thereof to a LED unit, and a control unit provided in the primary side to give a constant-current control function so that a secondary side output is maintained consistently. According to the present disclosure, it is possible to simplify the circuit structure of the secondary side and improve the efficiency by controlling the secondary side current at the primary side without secondary side feedback information.
    Type: Grant
    Filed: March 20, 2013
    Date of Patent: December 2, 2014
    Assignee: Dongwoon Anatech Co., Ltd.
    Inventors: Jung Ho Jin, Hyun Il Park, Ju Seong Kim
  • Patent number: 8896207
    Abstract: The present invention is directed to a fluorescent light fixture assembly including a ballast and a novel lighting element that includes an array of LEDs and at least one converter module that enables the existing ballast providing an AC power input to supply DC power to the LED array. The lighting element includes a body that contains the LED array and the converter modules and shares the configuration of the lighting element that is to be retrofitted. The lighting element receives power from the pre-existing ballast, wherein the converter module provides a constant current source to power the LED array. Thus, the lighting element, including the converter module, replaces the conventional fluorescent light tube in a cost-effective retrofit manner with the existing ballast.
    Type: Grant
    Filed: November 19, 2010
    Date of Patent: November 25, 2014
    Assignee: ElectraLED Inc.
    Inventors: James Thomas, Gary Gatesman, James Mosier
  • Publication number: 20140327369
    Abstract: An LED bulb is described, comprising LEDs within a shell and a driver circuit to operate the LEDs at a plurality of brightness levels. The driver circuit comprises first and second inputs to receive AC, a neutral input, a converter circuit, first and second rectifier circuits, a detector circuit, and a processing circuit. The first rectifier circuit is connected to the first and neutral inputs and rectifies the AC received. The second rectifier circuit is connected to the second and neutral inputs and rectifies the AC received. The detector circuit is connected to the first and second rectifier circuits. The processing circuit has a first and a second processor input, and is connected to the detector circuit. The processing circuit produces a chop signal with a duty cycle based on whether the first or second input is hot. The converter circuit powers the LEDs based on the chop signal.
    Type: Application
    Filed: May 2, 2013
    Publication date: November 6, 2014
    Applicant: SWITCH BULB COMPANY, INC.
    Inventor: Rolf WENDT
  • Publication number: 20140246987
    Abstract: Disclosed is a constant current drive for an LED light source, including a main power supply loop and at least one backup power supply loop. The main power supply loop at least includes a power conversion circuit. The power conversion circuit outputs a constant current to an LED light source. The backup power supply loop at least includes a power conversion backup circuit. The power conversion backup circuit outputs a constant current to the LED light source. When the power conversion circuit and the power conversion backup circuit operate normally, any one thereof operates in a nominal state or a derating state, and the output ends thereof are connected in parallel and then supply power to the LED light source simultaneously. When any one of the power conversion circuit and the power conversion backup circuit is invalid, the invalid circuit will not affect the normal operation of the remaining circuit.
    Type: Application
    Filed: September 28, 2012
    Publication date: September 4, 2014
    Applicant: INVENTRONICS (HANGZHOU), INC.
    Inventors: Guichao Hua, Delai Jiang
  • Publication number: 20140239835
    Abstract: The present invention relates to an SCR dimming circuit and method for regulating the luminance of an LED load. In one embodiment, an SCR dimming circuit can include: an SCR element that generates a lack-phase AC voltage based on a sinusoidal AC supply; a rectifier bridge that generates a lack-phase DC voltage based on the lack-phase AC voltage; a conduction angle generator that receives the lack-phase DC voltage, and generates a controlling signal representative of a conduction angle of the SCR element; and a dimming signal generator that generates a dimming signal to regulate luminance of the LED load, where the dimming signal generator receives the controlling signal, an adjustable signal, and a clamping voltage, an amplitude of a dimming phase angle range is selected by a fixed signal determined by the clamping voltage, and the dimming phase angle range may be shifted by regulating the adjustable signal.
    Type: Application
    Filed: May 8, 2014
    Publication date: August 28, 2014
    Applicant: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Shenglun Chen, Wei Chen, Xiaoru Xu
  • Publication number: 20140239834
    Abstract: An LED lighting device using a ballast may be provided that includes: an LED unit which includes at least one LED device; a rectifier which rectifies a current power signal output from the ballast; and a current driving unit which receives an output current of the rectifier and controls the power which is transmitted from the ballast to the LED unit. The current driving unit transmits current which has a magnitude greater than that of the output current of the rectifier to the LED unit.
    Type: Application
    Filed: February 21, 2014
    Publication date: August 28, 2014
    Applicant: HiDeep Inc.
    Inventors: Jaeyoung Choi, Heeseok Han
  • Patent number: 8786203
    Abstract: A light system that is controllable to generate a plurality of selected lighting effects, the light system includes a main processor, the main processor being in communication with a plurality of light sources; and each of the plurality of light sources having a distinct, known address whereby one of more of the light sources are individually addressable by the main processor, a known address being received by a selected light source of the plurality of light sources and acting to set the selected light source of the plurality of light sources in a disposition to receive a subsequent command from the main processor for generating a selected lighting effect. A light source and a method of forming a light system are further included.
    Type: Grant
    Filed: January 24, 2013
    Date of Patent: July 22, 2014
    Assignee: Seasonal Specialties, LLC
    Inventor: Robert C. Neuman
  • Patent number: 8754584
    Abstract: The present invention relates to a silicon-controlled rectifier (SCR) dimming circuit and method for regulating the luminance of a light-emitting diode (LED) load. In one embodiment, an SCR dimming circuit can include: an SCR rectifying circuit having an SCR element that receives an AC power supply, and generates a lack-phase AC voltage; a rectifier bridge that converts the lack-phase AC voltage to a lack-phase DC voltage, where the lack-phase DC voltage is filtered through a filter capacitor to generate a smooth DC voltage; a conduction phase angle signal generator that receives the lack-phase DC voltage and generates a controlling signal indicating a conduction phase angle range of the SCR element; and a dimming signal generator that compares the controlling signal and a slope reference signal to output a dimming signal to control the luminance of the LED load.
    Type: Grant
    Filed: October 28, 2013
    Date of Patent: June 17, 2014
    Assignee: Silergy Semiconductor Technology (Hangzhou) Ltd.
    Inventors: Shenglun Chen, Wei Chen, Xiaoru Xu
  • Publication number: 20140159608
    Abstract: A driver circuit for a lamp assembly including one or more solid state light sources is provided. The driver circuit includes filtering and power factor correction with protective isolation. The driver circuit includes a transformer with electrically isolated windings and a power factor correction circuit that receives no feedback from a secondary winding of the transformer.
    Type: Application
    Filed: November 22, 2013
    Publication date: June 12, 2014
    Applicant: OSRAM SYLVANIA INC.
    Inventors: Victor M. Simi, Tracy S. Woo, Khounthavy Nai Phasay
  • Patent number: 8736185
    Abstract: The present invention relates to an SCR dimming circuit and method for regulating the luminance of an LED load. In one embodiment, an SCR dimming circuit can include: an SCR element that generates a lack-phase AC voltage based on a sinusoidal AC supply; a rectifier bridge that generates a lack-phase DC voltage based on the lack-phase AC voltage; a conduction angle generator that receives the lack-phase DC voltage, and generates a controlling signal representative of a conduction angle of the SCR element; and a dimming signal generator that generates a dimming signal to regulate luminance of the LED load, where the dimming signal generator receives the controlling signal, an adjustable signal, and a clamping voltage, an amplitude of a dimming phase angle range is selected by a fixed signal determined by the clamping voltage, and the dimming phase angle range may be shifted by regulating the adjustable signal.
    Type: Grant
    Filed: March 5, 2012
    Date of Patent: May 27, 2014
    Assignee: Sileroy Semiconductor Technology (Hangzhou) Ltd.
    Inventors: Shenglun Chen, Wei Chen, Xiaoru Xu
  • Publication number: 20140139128
    Abstract: A direct current (DC) conversion circuit suitable for driving a load comprises a buck-boost converter, a resonant stage circuit and an output stage circuit. The buck-boost converter has two input ends receiving a first DC signal, and two output ends outputting a second DC signal. The resonant stage circuit has two input ends receiving the second DC signal. The resonant stage circuit converts the second DC signal to energy and further converts the energy to a negative voltage by a resonance effect. The resonant stage circuit has two input ends outputting the energy. The output stage circuit has two input ends receiving the energy to store the energy, and two output ends outputting energy to the load.
    Type: Application
    Filed: July 9, 2013
    Publication date: May 22, 2014
    Inventors: Wen-Tien Tsai, Ching-Ran Lee, Po-Yen Chen, Ching-Tsai Pan
  • Publication number: 20140077716
    Abstract: In a power supply device 1, power factor improving circuits 15 and 16 are connected to an external power supply and configured to supply electric power to a driving circuit 19, improve a power factor of an input current to the driving circuit 19, and perform an interleave operation. The driving circuit 19 subjects an LED 111 to lighting control.
    Type: Application
    Filed: March 11, 2013
    Publication date: March 20, 2014
    Applicant: Toshiba Lighting & Technology Corporation
    Inventors: Hirokazu Otake, Katsuya Ooto
  • Patent number: 8674612
    Abstract: A fluorescent tube driving device including a first voltage converter, a second voltage converter, an oscillating unit, an inverter, an adjusting unit, a switching unit and a voltage stabilizing unit is provided. The first and the second voltage converters convert an alternating-current (AC) voltage to a first direct-current (DC) voltage and a second DC voltage. The oscillating unit is charged by the first DC voltage to generate a charging voltage and a trigger signal. The adjusting unit is charged by the charging voltage to generate a power supply signal. The switching unit transmits the second DC voltage according to the power supply signal. The voltage stabilizing unit stabilizes the voltage from the switching unit. Both of the oscillating unit and the adjusting unit are charged at a delay speed to synchronously transmit the operation voltage and the trigger signal to a controller in the inverter.
    Type: Grant
    Filed: April 30, 2012
    Date of Patent: March 18, 2014
    Assignee: Beyond Innovation Technology Co., Ltd.
    Inventor: Zhen-Chun Liu
  • Publication number: 20140062325
    Abstract: The present invention relates to a silicon-controlled rectifier (SCR) dimming circuit and method for regulating the luminance of a light-emitting diode (LED) load. In one embodiment, an SCR dimming circuit can include: an SCR rectifying circuit having an SCR element that receives an AC power supply, and generates a lack-phase AC voltage; a rectifier bridge that converts the lack-phase AC voltage to a lack-phase DC voltage, where the lack-phase DC voltage is filtered through a filter capacitor to generate a smooth DC voltage; a conduction phase angle signal generator that receives the lack-phase DC voltage and generates a controlling signal indicating a conduction phase angle range of the SCR element; and a dimming signal generator that compares the controlling signal and a slope reference signal to output a dimming signal to control the luminance of the LED load.
    Type: Application
    Filed: October 28, 2013
    Publication date: March 6, 2014
    Applicant: Silergy Semiconductor Technology (Hagzhou) LTD
    Inventors: Shenglun Chen, Wei Chen, Xiaoru Xu
  • Publication number: 20140062324
    Abstract: There are provided a signal detection circuit and an igniter capable of enhancing a capability of withstanding breakdown by noise. The signal detection circuit includes an input terminal Sin configured to receive a control signal from an ECU and a bidirectional floating diode provided between the input terminal and a ground. Further, the signal detection circuit includes an attenuation circuit configured to attenuate an output of the bidirectional floating diode, a low-pass filter configured to pass a low-frequency component of the output of the attenuation circuit, and a comparator configured to compare an output of the low-pass filter with a reference voltage.
    Type: Application
    Filed: September 5, 2013
    Publication date: March 6, 2014
    Applicant: Rohm Co., Ltd.
    Inventor: Katsuya Obe
  • Publication number: 20140049175
    Abstract: A PFC converter (100) is disclosed that includes a voltage rectifier circuit (126, 127, 153) and a voltage regulator circuit (81, 90, 33, 54). The PFC converter (100) also includes an inductor (140) having a plurality of auxiliary windings (141, 142) coupled to the voltage rectifier circuit (126, 27, 153) and the voltage regulator circuit (81, 90,33, 54). One of the auxiliary windings (142) is arranged to supply a start up voltage (V1), during a start up stage, using the voltage rectifier circuit (126, 127, 153)to the voltage regulator circuit (81, 90, 33, 54). Another of the auxiliary windings (141)is arranged to supply a voltage (V1), during a steady-state stage, using the voltage rectifier circuit (126, 127, 153) to the voltage regulator circuit (81, 90, 33, 54).
    Type: Application
    Filed: April 20, 2012
    Publication date: February 20, 2014
    Applicant: KONINKLIJKE PHILIPS N.V.
    Inventors: Yuhong Fang, Sanjaya Kumar Pradhan
  • Publication number: 20140009076
    Abstract: This straight tube LED illumination lamp includes the following: an LED element; a first plug having an input-output terminal and an empty terminal; a second plug having an input-output terminal and an empty terminal; a first rectifier that is connected to the input-output terminal of the first plug and the empty terminal of the second plug in order to convert alternating current to direct current; a second rectifier that is connected to the input-output terminal of the second plug and the empty terminal of the first plug in order to convert alternating current to direct current; and a bypass circuit through which current is flown back from either the first or second rectifier to the other rectifier. The bypass circuit has a current-limiting resistor to prevent the first and second rectifiers from being damaged.
    Type: Application
    Filed: March 19, 2012
    Publication date: January 9, 2014
    Applicant: SODICK CO., LTD.
    Inventor: Yuki Tsuda
  • Patent number: 8624520
    Abstract: An electrical appliance, particularly a television or a monitor, having a lighting device (8) having light emitting diodes (12). The light emitting diodes (LED) (12) are collected in LED strings (11) and controlled by a balancing network (17). The balancing network (17) has a circuit branch (19) for each string (11), the circuit branches (19) being connected in parallel to each other. Disposed in each circuit branch (19), is a bridge rectifier (20) to which the LED string (11) is connected. Moreover, each circuit branch has a balancing transformer (23), wherein all the secondary windings (26) of the balancing transformer (23) are connected in series in a closed conductor loop (27), by which the currents in all circuit branches are balanced.
    Type: Grant
    Filed: May 2, 2011
    Date of Patent: January 7, 2014
    Assignee: Minebea Co., Ltd.
    Inventors: Manfred Schlenk, Robert Weger
  • Publication number: 20130320873
    Abstract: A sensing device includes a sensing transmitting module and a sensing receiving module respectively mounted in a first housing and a second housing. And an output terminal of the sensing transmitting module and an input terminal of the sensing receiving module are provided with a sensing coil and an electromagnetic rod respectively, the first housing and the second housings are cooperated with each other, and the electromagnetic rod is inserted into the sensing coil, so that the sensing coil or the electromagnetic rod is placed in magnetic field generated by the electromagnetic rod or the sensing coil thereby generating sensing voltage. The sensing parts are formed of the sensing coil and the electromagnetic rod, which significantly reduces the amount of the copper wires in the sensing coil and the electromagnetic rod, therefore the sensing device has a smaller size, lighter weight and lower cost.
    Type: Application
    Filed: February 25, 2012
    Publication date: December 5, 2013
    Inventors: Guangshi Tang, Shaoming Yu
  • Publication number: 20130307427
    Abstract: A light emitting diode current-balancing driving circuit is provided. In accordance with the first aspect of the present invention, a light emitting diode current-balancing driving circuit is provided. The light emitting diode current-balancing driving circuit includes a plurality of rectifiers; a current-balancing circuit having a plurality of capacitors respectively coupled to the plurality of rectifiers; and a plurality of diodes electrically connected to the plurality of rectifiers respectively.
    Type: Application
    Filed: May 16, 2013
    Publication date: November 21, 2013
    Applicant: National Cheng Kung University
    Inventors: Tsorng-Juu Liang, Tzu-Hsuan Kuo, Wei-Ching Tseng, Jiann-Fuh Chen
  • Publication number: 20130249427
    Abstract: A light driving apparatus includes a first rectifying unit for receiving AC power and rectifying the AC power into DC, a switching element controlled to turn on or off by a control signal, a transforming unit having a transformer and an inductor connected to a primary side of the transformer in parallel, a second rectifying unit for rectifying a secondary side output of the transforming unit and supplying an output voltage thereof to a LED unit, and a control unit provided in the primary side to give a constant-current control function so that a secondary side output is maintained consistently. According to the present disclosure, it is possible to simplify the circuit structure of the secondary side and improve the efficiency by controlling the secondary side current at the primary side without secondary side feedback information.
    Type: Application
    Filed: March 20, 2013
    Publication date: September 26, 2013
    Applicant: DONGWOON ANATECH CO., LTD.
    Inventors: JUNG HO JIN, HYUN IL PARK, JU SEONG KIM
  • Publication number: 20130234616
    Abstract: According to one embodiment, a power supply for lighting includes a rectifying circuit, a smoothing capacitor, and a current control circuit. The rectifying circuit rectifies a phase-controlled alternating-current voltage supplied to between a pair of input terminals. The smoothing capacitor is connected to a high-potential terminal and a low-potential terminal of the rectifying circuit. A first electric current flows to the current control circuit in a period when an absolute value of the alternating-current voltage is lower than a specified value. After a second electric current larger than the first electric current flows when the absolute value of the alternating-current voltage increases to be equal to or larger than the specified value, the current control circuit is shut off to reduce a current value to be smaller than the second electric current until the absolute value of the alternating-current voltage decreases to be lower than the specified value.
    Type: Application
    Filed: June 26, 2012
    Publication date: September 12, 2013
    Applicant: Toshiba Lighting & Technology Corporation
    Inventors: Noriyuki KITAMURA, Hirokazu OTAKE, Yuji TAKAHASHI
  • Patent number: 8502462
    Abstract: The voltage detection module according to the invention comprises: a first electric terminal; a second ground terminal; a load resistor, connected to the first electric terminal; a main gas-filled spark gap, arranged in series between the load resistor and the second terminal; and a main capacitor, connected, on the one hand, to a first middle point situated between the load resistor and the main gas-filled spark gap and, on the other hand, to the second terminal. The voltage detection module also comprises a light source connected in series between the main gas-filled spark gap and the second terminal, the light source and the main gas-filled spark gap being separate from one another. The voltage detection module comprises an additional stage capable of limiting the voltage applied to the terminals of the gas-filled spark gap to a threshold voltage chosen so as to prevent the gas-filled spark gap from always being on.
    Type: Grant
    Filed: December 6, 2011
    Date of Patent: August 6, 2013
    Assignee: Thales
    Inventors: Salvador Mancho-Banuls, Laurent Nennig, Sebastien Pottier
  • Patent number: 8487555
    Abstract: A bi-level lamp ballast to selectively operate two lamps is provided. The ballast includes a control circuit having an input, connected to a switching network, and an output, which provides a particular control signal based on the state of the switching network. The ballast also includes respective lamp control switches, each having respective outputs. The first switch is connected to the output and a ballast power supply. In its first state, it connects the ballast power supply to its first output, and in its second state, it connects the ballast power supply to its second output. The second switch is connected to the output and a ground. In its first state, it connects the ground to its first output, and in its second state, it connects the ground to its second output. The state of each lamp control switch depends on the control signal generated by the control circuit.
    Type: Grant
    Filed: May 11, 2011
    Date of Patent: July 16, 2013
    Assignee: Osram Sylvania Inc.
    Inventors: Nitin Kumar, Shashank Bakre
  • Patent number: RE44806
    Abstract: An adapter for permitting a medical diagnostic instrument having an illumination source including at least one LED (light emitting diode) to be used with a power supply normally configured for use with a diagnostic instrument having at least one incandescent lamp as an illumination source. The adapter includes circuitry for compensating LED specific characteristics for permitting the power supply to be used with the LED.
    Type: Grant
    Filed: October 2, 2009
    Date of Patent: March 18, 2014
    Assignee: Welch Allyn, Inc.
    Inventors: Chris R. Roberts, Corinn C. Fahrenkrug, Allan I. Krauter, Shawn A. Briggman, Michael A. Pasik, Peter J. Davis, John R. Strom, Charles N. Stewart, Jon R. Salvati, Robert L. Vivenzio