Electric Switch Controlled Load Device Patents (Class 315/193)
  • Patent number: 10380952
    Abstract: A light emitting assembly is described. In one embodiment, one or more light emitting diode (LED) devices and one or more microcontrollers are bonded to a same side of a substrate, with the one or more microcontrollers to switch and drive the one or more LED devices.
    Type: Grant
    Filed: February 28, 2018
    Date of Patent: August 13, 2019
    Assignee: Apple Inc.
    Inventors: Kapil V. Sakariya, Andreas Bibl, Kelly McGroddy
  • Patent number: 10349478
    Abstract: In some embodiments, a circuit is provided that includes (1) a plurality of light emitting diode (LED) strings coupled to each other in series; (2) a power supply circuit coupled to a first LED string of the plurality of LED strings; (3) a feedback circuit coupled between a second LED string of the plurality of LED strings and the power supply circuit; and (4) a current steering circuit coupled to the first LED string of the plurality of LED strings and further coupled to the second LED string of the plurality LED strings. The current steering circuit includes a plurality of switchable conductive pathways.
    Type: Grant
    Filed: January 26, 2018
    Date of Patent: July 9, 2019
    Assignee: ISINE Inc.
    Inventors: Louis J. Morales, Nikolay I. Gishin
  • Patent number: 10342106
    Abstract: A smart dimming system includes: a server communicated with a control device; a Bluetooth series interface control module; a first series dimming control module electrically connected to a first light-emitting diode lamp module; and a second series dimming control module electrically connected to a second light-emitting diode lamp module. One of the first series dimming control module and the second series dimming control module is electrically connected to the Bluetooth series interface control module. A dimming control signal is transmitted to the server, the server provides a Bluetooth control signal to the Bluetooth series interface control module according to the dimming control signal, and the Bluetooth series interface control module provides a series dimming signal to one of the first series dimming control module and the second series dimming control module to dim light of the first light-emitting diode lamp module and the second light-emitting diode lamp module.
    Type: Grant
    Filed: December 20, 2018
    Date of Patent: July 2, 2019
    Inventor: Ming-Tsung Chen
  • Patent number: 10327315
    Abstract: A lighting apparatus includes an apparatus communicator and an apparatus controller. The apparatus communicator wirelessly transmits and receives information on operations of the lighting apparatuses. The apparatus controller interprets: a mesh profile which is a communications protocol for the lighting apparatus to transmit and receive the information to and from another lighting apparatus and a communication terminal forming a mesh network, and a user profile which is a communications protocol for the lighting apparatus and the communication terminal to communicate with each other, the user profile being set depending the communication terminal.
    Type: Grant
    Filed: October 16, 2018
    Date of Patent: June 18, 2019
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventor: Shinichiro Kurihara
  • Patent number: 10314125
    Abstract: An analog AC driven fully dimmable circuit that reduces the gap between peak current and a minimum current to improve dimming properties and provide additional functionality to a lighting device. The circuit provides ancillary circuitry that bypasses an analog step driving section of the circuit without the use of an ancillary transistor. The ancillary circuitry bypasses the analog step driving section of the circuit and has a capacitor to continuously provide current to the first series interconnection such that the first series interconnection continuously emits light during operation of the circuit.
    Type: Grant
    Filed: August 18, 2017
    Date of Patent: June 4, 2019
    Assignee: Once Innovations, Inc.
    Inventors: Zdenko Grajcar, David Natarelli, Hoa Huynh
  • Patent number: 10306731
    Abstract: A light emitting diode system allows for high current end user LED matrix applications while mitigating internal damage to control circuitry that may be caused by excess current flow. In one example, multiple switches operate in parallel across an LED. When an overvoltage condition is detected in a first switch, a logic circuit determines those switches programmed to operate in parallel and causes them to conduct current. This reduces the amount of current flowing through any one switch and mitigates harm to the device. The parallel configuration of switches may be driven by a single pulse width modulated current. This allows the drive current to be divided between parallel transistors, limiting the damaging effects that can be caused by high currents flowing through the transistors.
    Type: Grant
    Filed: May 5, 2017
    Date of Patent: May 28, 2019
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Michael James Drake, Daniel Ross Herrington, Sumeet Prakash Kulkarni, Vahid Yousefzadeh, James Michael Patterson, James Harbison Masson
  • Patent number: 10292233
    Abstract: A luminaire can include a power supply that receives AC mains power from a power source and delivers intermediate power. The luminaire can also include a control module coupled to the power supply, wherein the control module receives the intermediate power from the power source, where the control module includes at least one first switch that has multiple positions, where each position of the at least one first switch corresponds to an output power level of a plurality of output power levels. The output power level can correspond to a discrete correlated color temperature (CCT) output by a plurality of light sources of the luminaire.
    Type: Grant
    Filed: September 6, 2017
    Date of Patent: May 14, 2019
    Assignee: COOPER TECHNOLOGIES COMPANY
    Inventors: Rohit Madhav Udavant, Raymond George Janik
  • Patent number: 10257895
    Abstract: Methods and systems are provided for operating a lighting array that is comprised of one or more lighting segments. In one example, the lighting segments may be comprised of light emitting diodes that are electrically coupled in series. The lighting segments may be controlled responsive to output of a potentiometer and the lighting segments may be controlled responsive to positions of circuit boards in an enclosure.
    Type: Grant
    Filed: October 4, 2017
    Date of Patent: April 9, 2019
    Assignee: Phoseon Technology, Inc.
    Inventor: Salvatore T. Battaglia
  • Patent number: 10244592
    Abstract: Systems and methods are provided herein for current regulation. An example system controller includes: a first controller terminal configured to receive an input voltage, the first controller terminal being further configured to allow a first current flowing into the system controller based at least in part on the input voltage in response to one or more switches being closed; a second controller terminal configured to allow the first current to flow out of the system controller through the second controller terminal in response to the one or more switches being closed; a fourth controller terminal coupled to the third controller terminal through a first capacitor, the first capacitor not being any part of the system controller; and an error amplifier configured to generate a compensation signal based at least in part on the current sensing signal, the error amplifier including a second capacitor.
    Type: Grant
    Filed: December 7, 2017
    Date of Patent: March 26, 2019
    Assignee: On-Bright Electronics (Shanghai) Co., Ltd.
    Inventors: Meng Li, Mingli Kang, Liqiang Zhu, Lieyi Fang
  • Patent number: 10212768
    Abstract: Systems and methods are provided herein for current regulation. An example system controller includes: a first controller terminal configured to receive an input voltage, the first controller terminal being further configured to allow a first current flowing into the system controller based at least in part on the input voltage in response to one or more switches being closed; a second controller terminal configured to allow the first current to flow out of the system controller through the second controller terminal in response to the one or more switches being closed; a fourth controller terminal coupled to the third controller terminal through a first capacitor, the first capacitor not being any part of the system controller; and an error amplifier configured to generate a compensation signal based at least in part on the current sensing signal, the error amplifier including a second capacitor.
    Type: Grant
    Filed: December 7, 2017
    Date of Patent: February 19, 2019
    Assignee: On-Bright Electronics (Shanghai) Co., Ltd.
    Inventors: Meng Li, Mingli Kang, Liqiang Zhu, Lieyi Fang
  • Patent number: 10206252
    Abstract: According to an example, a device is provided for driving several light sources, wherein the device is arranged to sense a supply signal and apply a phase shift to a switching signal of at least one of the several light sources based on the sensed supply signal. Also, accordingly a method, a lighting device, a computer program product and a computer-readable medium are suggested.
    Type: Grant
    Filed: September 8, 2016
    Date of Patent: February 12, 2019
    Assignee: Infineon Technologies AG
    Inventors: Maurizio Galvano, Adolfo De Cicco, Andrea Scenini
  • Patent number: 10201053
    Abstract: As a non-limiting example, various aspects of this disclosure provide embodiments of AC direct drives for light emitting diodes for a wide variety of drive stages.
    Type: Grant
    Filed: May 29, 2018
    Date of Patent: February 5, 2019
    Assignee: Exar Corporation
    Inventor: Jon Elliott Cronk
  • Patent number: 10182478
    Abstract: Systems and methods are provided herein for current regulation. An example system controller includes: a first controller terminal configured to receive an input voltage, the first controller terminal being further configured to allow a first current flowing into the system controller based at least in part on the input voltage in response to one or more switches being closed; a second controller terminal configured to allow the first current to flow out of the system controller through the second controller terminal in response to the one or more switches being closed; a fourth controller terminal coupled to the third controller terminal through a first capacitor, the first capacitor not being any part of the system controller; and an error amplifier configured to generate a compensation signal based at least in part on the current sensing signal, the error amplifier including a second capacitor.
    Type: Grant
    Filed: December 7, 2017
    Date of Patent: January 15, 2019
    Assignee: On-Bright Electronics (Shanghai) Co., Ltd.
    Inventors: Meng Li, Mingli Kang, Liqiang Zhu, Lieyi Fang
  • Patent number: 10165634
    Abstract: According to an example, a device is provided for driving several light sources, wherein the device is arranged to sense a supply signal and apply a phase shift to a switching signal of at least one of the several light sources based on the sensed supply signal. Also, accordingly a method, a lighting device, a computer program product and a computer-readable medium are suggested.
    Type: Grant
    Filed: September 8, 2016
    Date of Patent: December 25, 2018
    Assignee: Infineon Technologies AG
    Inventors: Maurizio Galvano, Adolfo De Cicco, Andrea Scenini
  • Patent number: 10165651
    Abstract: In an LED illumination system including a power supply device having a function of adjusting an amount of a supply current and an LED illumination device connected to the power supply device, the LED illumination device includes: an LED circuit; a bypass circuit; and a distribution circuit that distributes a current supplied from the power supply device at a predetermined fixed ratio regardless of a current value and supplies one part thereof to the LED circuit and the other part thereof to the bypass circuit.
    Type: Grant
    Filed: July 26, 2016
    Date of Patent: December 25, 2018
    Assignee: CCS Inc.
    Inventor: Yuichiro Tanaka
  • Patent number: 10143048
    Abstract: A control circuit for a voltage converter has a switch which has a multiplicity of parallel-connected current-conducting branches with resistors with different resistance values, and a contact maker. The contact maker is configured to connect selectively in each case one of the multiplicity of parallel-connected current-conducting branches to an input contact of the switch. The control circuit also includes a detector circuit which is configured to determine a voltage drop across the resistors and to output, as a function of the determined voltage drop, an actuation signal for setting a setpoint output current of the voltage converter to the voltage converter.
    Type: Grant
    Filed: October 7, 2016
    Date of Patent: November 27, 2018
    Assignee: H4X e.U.
    Inventor: Andreas Hierzer
  • Patent number: 10133167
    Abstract: A projection apparatus and a light source module are provided. The light source module includes a light-emitting element string, a shunt module, and a control circuit. A first shunt circuit, a second shunt circuit, and a third shunt circuit of the shunt module are coupled to the light-emitting element string, and are adapted to provide a first shunt path, a second shunt path or a third shunt path, such that the light-emitting element string is still maintained to normally work when a light-emitting element/light-emitting elements is/are malfunctioned.
    Type: Grant
    Filed: February 23, 2018
    Date of Patent: November 20, 2018
    Assignee: Coretronic Corporation
    Inventor: Jian-Jiun Wu
  • Patent number: 10136505
    Abstract: Lighting apparatuses each include an apparatus communicator and an apparatus controller. The apparatus communicator wirelessly transmits and receives information on operations of the lighting apparatuses. The apparatus controller interprets: a mesh profile which is a communications protocol for the lighting apparatus to transmit and receive the information to and from another lighting apparatus and a communication terminal forming a mesh network, and a user profile which is a communications protocol for the lighting apparatus and the communication terminal to communicate with each other, the user profile being set depending on the communication terminal.
    Type: Grant
    Filed: January 9, 2017
    Date of Patent: November 20, 2018
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventor: Shinichiro Kurihara
  • Patent number: 10111290
    Abstract: Disclosed is an apparatus for synchronous driving of multi-channel light emitting diodes capable of driving all light emitting diodes at the same time regardless of an input voltage level. The apparatus includes: a rectification unit rectifying an AC voltage; a multi-channel light emitting diode unit including at least a first light emitting diode and a second light emitting diode, and being driven by receiving the rectified current; a current sensor unit sensing a current flowing in the first light emitting diode; a current mirror unit mirroring the current sensed by the current sensor, and supplying the mirrored current to the second first light emitting diode; and a sequential current driving unit connected to the first light emitting diode and the second light emitting diode, providing a path to a current flowing in the first light emitting diode or in the second light emitting diode, and activating the current sensor unit.
    Type: Grant
    Filed: August 18, 2015
    Date of Patent: October 23, 2018
    Assignee: Point Tek Co., Ltd.
    Inventor: Shi Hong Park
  • Patent number: 10070492
    Abstract: The dimming device includes a pair of input terminals, a bidirectional switch, an inputter, a power supply, a controller, and a current limiter. The power supply is electrically connected between the pair of input terminals and is supplied with electric power from an AC power supply to generate control electric power. The controller is supplied with the control electric power from the power supply to operate. The controller is configured to control the bidirectional switch in accordance with a dimming level. The current limiter stops generation of the control electric power by the power supply when a current larger than or equal to a specified value flows from the AC power supply through the power supply.
    Type: Grant
    Filed: June 28, 2016
    Date of Patent: September 4, 2018
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Kiyosi Gotou, Tomohiro Miyake, Eiichirou Niikura, Kengo Miyamoto
  • Patent number: 10015853
    Abstract: Provided is a light emission device. When the size of an input voltage exceeds a minimum light emission voltage, all light emission elements emit light always irrespective of the size of a voltage, and as the size of the voltage decreases, the light emission device has a configuration in which the light emission elements are connected in parallel with each other, and as the size of the voltage increases, the light emission device has a configuration in which the light emission elements are connected in series with each other.
    Type: Grant
    Filed: August 27, 2017
    Date of Patent: July 3, 2018
    Assignee: LUMENS CO., LTD.
    Inventors: Soo Geun Yoo, Hong Geol Choi, Ho Young Lee, Myeong Kook Gong
  • Patent number: 9955555
    Abstract: The present disclosure provides lighting control system multi-switch apparatuses and methods. The apparatus includes a lighting control module including at least three electrical terminals. The lighting control module configured to cause a transmission of a quantity of electrical energy to a lighting circuit of a light fixture electrically connected to the lighting control module. The apparatus includes a detector circuit positioned in the lighting control module. The apparatus includes a controller in electrical communication with the detector circuit, the controller specially programmed to cause a call signal to be transmitted to a switch connected to the traveler terminal, the call signal configured to request the switch connected to the traveler terminal transmit a response signal to the controller to identify the switch connected to the traveler terminal.
    Type: Grant
    Filed: April 11, 2017
    Date of Patent: April 24, 2018
    Assignee: Noon Home, Inc.
    Inventor: William Lark, Jr.
  • Patent number: 9939117
    Abstract: A light emitting diode system includes a light emitting diode lamp string, a signal voltage unit and a control unit. The light emitting diode lamp string includes a plurality of light emitting diode units. The control unit drives the signal voltage unit to adjust a voltage of the light emitting diode lamp string continuously and repeatedly so the voltage of the light emitting diode lamp string is a predetermined voltage, to form a light signal comprising a plurality of pulse waves to send the light signal to the light emitting diode lamp string. When each of the light emitting diode units receives the light signal, each of the light emitting diode units performs a conversion and a decoding for the light signal to obtain a lighting mode of the light signal, and then each of the light emitting diode units lights based on the lighting mode.
    Type: Grant
    Filed: December 20, 2017
    Date of Patent: April 10, 2018
    Assignee: SEMISILICON TECHNOLOGY CORP.
    Inventor: Wen-Chi Peng
  • Patent number: 9918360
    Abstract: A lighting apparatus using light emitting diodes is disclosed. A plurality of light-emitting groups are connected to each other in series at an output terminal of a rectification unit. Current diodes as current sources are branched from a node between the light-emitting groups. Current values set in the current diodes are set according to the amount of current flowing into the light-emitting groups. Therethrough, the amount of current flowing in each light-emitting group can be determined.
    Type: Grant
    Filed: July 8, 2013
    Date of Patent: March 13, 2018
    Assignee: Seoul Semiconductor Co., Ltd.
    Inventors: Chung Hoon Lee, Keon Young Lee
  • Patent number: 9888537
    Abstract: An LED array includes three or more strings of bare LEDs mounted in close proximity to each other on a substrate. The strings of LEDs emit light of one or more wavelengths of blue, indigo and/or violet light, with peak wavelengths that are less than 490 nm. Luminescent materials deposited on each of the LED chips in the array emit light of different wavelength ranges that are of longer wavelengths than and in response to light emissions from the LED chips. A control circuit applies currents to the strings of LEDs, causing the LEDs in the strings to emit light, which causes the luminescent materials to emit light. A user interface enables users to control the currents applied by the control circuit to the strings of LEDs to achieve a Correlated Color Temperature (CCT) value and hue that are desired by users, with CIE chromaticity coordinates that lie on, or near to the black body radiation curve.
    Type: Grant
    Filed: September 14, 2015
    Date of Patent: February 6, 2018
    Assignee: DICON FIBEROPTICS, INC.
    Inventors: Ho-Shang Lee, Brian I-Yuan Chiang, Junying Lu, Robert Eric Schleicher
  • Patent number: 9844114
    Abstract: Techniques are described to allow a low-cost light fixture to produce light with a relatively high color rendering index (CRI) across a range of color temperatures. A rectified AC voltage may be provided to multiple groups of light-emitting diodes (LEDs) having characteristics related to a range of color temperatures and a target CRI level. The multiple groups of LEDs may be controlled based on a received control signal, such that the combined groups of LEDs produce combined light having a produced color temperature within the range of color temperatures, and having a produced CRI level that is approximately the target CRI level. In some implementations, the received control signal is modified by a modification circuit, and the multiple groups of LEDs may be controlled based on the modified control signal.
    Type: Grant
    Filed: December 9, 2016
    Date of Patent: December 12, 2017
    Assignee: ALB IP HOLDING LLC
    Inventors: Towfiq Chowdhury, Michael Z. Gielniewski, Feng Chen, Alejandro Lopez
  • Patent number: 9814105
    Abstract: A control circuit for LED and an active bleeder thereof are provided. The control circuit comprises an LED driver and the active bleeder. The LED driver drives at least one LED and generates a current-sense signal. The current-sense signal is correlated to an LED current. The active bleeder comprises a bleeder circuit. The bleeder circuit is coupled to the LED driver to receive the current-sense signal and sinks a bleeding current in accordance with the current-sense signal for keeping the current flowing through the dimmer higher than the holding current.
    Type: Grant
    Filed: November 10, 2016
    Date of Patent: November 7, 2017
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventors: Chen-Hua Chiu, Moon-Ho Choi, Gwan-Bon Koo
  • Patent number: 9788372
    Abstract: A gate off delay compensation circuit includes a sensing interval determiner configured to determine an interval in which a driving voltage corresponds to a first and second level of a reference voltage as a driving voltage sensing interval, a driving voltage excess interval determiner configured to determine a driving voltage excess interval defined as an interval in which the driving voltage is larger than the reference voltage and a driving voltage period determiner configured to determine a period of the driving voltage based on the driving voltage sensing interval and the driving voltage excess interval. Therefore, a gate off delay compensation circuit 100 decreases an average driving current and an average driving voltage and allows decrease of a variation of a driving current according to a change of a input voltage VIN.
    Type: Grant
    Filed: February 23, 2016
    Date of Patent: October 10, 2017
    Assignee: Magnachip Semiconductor, Ltd.
    Inventors: Gyu Ho Lim, Jong Hyun Yoon, Zhi Yuan Cui, Yong Gi Ryu
  • Patent number: 9781794
    Abstract: A distributed lighting network has its lights scheduled based on weather forecast information. A lighting controller stores a lighting schedule for distribution to the distributed lighting network and transmits the lighting schedule to the network. The lighting controller receives from a subscription weather server, short-term or long-term weather forecast datasets. The lighting controller generates lighting control information to modify the lighting schedule, based on the received customized weather forecast datasets, and transmits the lighting control information to the distributed lighting network to modify the lighting schedule, based on the customized weather forecast datasets. The system also enables the lighting schedules to modulate human circadian rhythms if necessary to further promote public health and safety during weather events.
    Type: Grant
    Filed: November 17, 2016
    Date of Patent: October 3, 2017
    Assignee: Echelon Corporation
    Inventor: Sohrab Modi
  • Patent number: 9775203
    Abstract: A device and a method for driving the supply of power to a plurality of light sources that is made up of a first group of light sources comprising at least one light source, which first group of light sources is connected in series with at least one second group of light sources comprising at least one light source. The device comprises a supply circuit to which the plurality of light sources is connected as a load. According to the inventive measures, it becomes possible to short at least one of the groups of light sources without causing high intensity transient current peaks in the light sources that are not shorted.
    Type: Grant
    Filed: May 12, 2016
    Date of Patent: September 26, 2017
    Assignee: Valeo Vision
    Inventors: Patrick Wacheux, Massourang Diallo
  • Patent number: 9753435
    Abstract: A visual metronome for use with a drum kit, including circuitry for generating a succession of light signals according to a selected flashing pattern defined by frequency and duration. A circuit splitter is in operative communication with the metronome for multiplying the light signals. A plurality of individual light emitting components are in operative communication with the circuit splitter, the light emitting components being mounted to individual components associated with the drum kit to simultaneously display the flashing pattern corresponding to the multiplied light output signals at locations visible to a user of the drum kit. A plurality of cables extend between the circuit splitter and respective light emitting components. The light emitting components can each further include a different color in order to provide enhanced visibility in various stage lighting situations. A power supply communicates the metronome, including any of a battery or a 9V power outlet plug.
    Type: Grant
    Filed: February 26, 2016
    Date of Patent: September 5, 2017
    Inventor: Don Brewer
  • Patent number: 9755636
    Abstract: A large-power insulated gate switching device (e.g., MOSFET) is used for driving relatively large surges of pulsed power through a load. The switching device has a relatively large gate capacitance which is difficult to quickly discharge. A gate charging and discharging circuit is provided having a bipolar junction transistor (BJT) configured to apply a charging voltage to charge the gate of the switching device where the BJT is configured to also discontinue the application of the charging voltage. An inductive circuit having an inductor is also provided.
    Type: Grant
    Filed: June 23, 2015
    Date of Patent: September 5, 2017
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: David C. Wyland, Jonathan Alan Dutra
  • Patent number: 9730283
    Abstract: The disclosure regards to drivers and driving methods for a LED string consisting of LEDs. The LED string and a current switch are coupled in series between a power line and a ground line. The power line is powered to regulate a signal representing a current passing through the LED string. An enable signal capable of switching the current switch is provided. Whether a predetermined event occurs is detected. When the predetermined event occurs, the enable signal is clamped to have a predetermined logic value, the current switch thereby being kept either open or short.
    Type: Grant
    Filed: February 8, 2016
    Date of Patent: August 8, 2017
    Assignee: LEADTREND TECHNOLOGY CORPORATION
    Inventor: Ching-Tsan Lee
  • Patent number: 9709259
    Abstract: The present invention relates to a lighting device (100) (100), comprising at least one light emitting element (102) configured to emit light, a housing (300) having an elongated hollow base portion (302) and a light exit portion (304), wherein the elongated hollow base portion (302) has a polygonal cross section, and a heat transferring arrangement (200) formed from a folded sheet of a thermo conducting material inserted into and fixed inside of the housing (300), the heat transferring arrangement (200) comprising a first section (202) onto which the light emitting element (102) is arranged and adapted to receive heat generated from the at least one light emitting element (102) when emitting light, and a second section (204) having an outer surface which once fixed inside of the housing (300) is formed to be in abutment with an inner surface of the elongated hollow base portion (302) of the housing (300), so that the generated heat is thermally transferred to the housing (300).
    Type: Grant
    Filed: September 18, 2013
    Date of Patent: July 18, 2017
    Assignee: PHILIPS LIGHTING HOLDING B.V.
    Inventors: Reinier Imre Anton Den Boer, Peter Johannes Martinus Bukkems, Johannes Petrus Maria Ansems
  • Patent number: 9703185
    Abstract: Prior to a rising timing of a switching signal, a second FET is turned ON for a predetermined period according to a voltage switching signal. This allows a sum of a supply voltage of a first switching power source and a supply voltage of a second switching power source to be applied to a series circuit of a semiconductor light source, a drain-source of a first FET, and a current detecting resistor for a predetermined period before and after the rising timing of the switching signal.
    Type: Grant
    Filed: September 14, 2016
    Date of Patent: July 11, 2017
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventor: Takaaki Gyoten
  • Patent number: 9641083
    Abstract: The disclosure relates to a control device, a control method of a power converter and a switching power supply using the control device. The control device of the power converter includes: a first control unit, which is coupled to the power converter to detect an output voltage of the power converter and is configured to generate a first control signal based on the output voltage; a variable resistor unit, which is connected to an output terminal of the first control unit to receive the first control signal and is configured to generate a resistance value based on the first control signal; and a second control unit, which is connected to the variable resistor unit and is configured to output a second control signal in order to control operations of a switch unit of the power converter.
    Type: Grant
    Filed: October 20, 2014
    Date of Patent: May 2, 2017
    Assignee: DELTA ELECTRONICS (SHANGHAI) CO., LTD.
    Inventors: Haibin Song, Yuanqiang Gu, Jian Zhou, Daofei Xu
  • Patent number: 9609702
    Abstract: Disclosed are an LED lighting apparatus and a control circuit thereof which controls the brightness of a lamp including LEDs using a dimmer. The LED lighting apparatus and the control circuit use a starting current based on a rectified voltage, in order to supply a holding current to the dimmer in a state where a lamp including LEDs is turned off.
    Type: Grant
    Filed: June 25, 2014
    Date of Patent: March 28, 2017
    Assignee: SILICON WORKS CO., LTD.
    Inventors: Yong Goo Kim, Won Ji Lee, Kyung Min Kim, Jong Min Lee, Young Suk Son
  • Patent number: 9591708
    Abstract: The invention discloses an LED driving device for dynamic segment configurations and the LED lighting apparatus thereof, wherein, the said LED driving device includes a first adjustable LED lamp string unit, a first N-type switch module, at least one second adjustable LED lamp string unit, one unidirectional conduction unit, one P-type switch module, one second N-type switch module, control logic module and current detection module; the control logic module outputs control signals, based on output voltage changes from the bridge rectifier, to control the on and off states of the first adjustable LED lamp string unit, the adjustable LED lamp string module, the P-type switch module, the first and second N-type switch module, also it adjusts the parallel and serial connection states of the first and second adjustable LED lamp string units dynamically. The invention adopts the dynamically configuring technology, improving the lighting effects and the utilization of LED lamps.
    Type: Grant
    Filed: July 1, 2014
    Date of Patent: March 7, 2017
    Inventors: Xiaoyu Chen, Bo Chen, Xunsheng Deng, Yanquan Mai
  • Patent number: 9557042
    Abstract: An illumination system includes an illumination base. The illumination base has two common lines, a plurality of parallel branching lines extending between the common lines respectively, and a plurality of sockets disposed on the branching lines. The same number of sockets are disposed on each branching line, and the sockets are connected in series. The illumination system also includes light source elements. Each light source element has a first plug portion to be received in one of the sockets, and an LED lamp to be electrically connected to the illumination base when the first plug portion is received in the associated socket. The illumination system also includes resistor elements. Each resistor element has a second plug portion to be received in one of the sockets, and a resistor to be electrically connected to the illumination base when the second plug portion is received in the associated socket.
    Type: Grant
    Filed: November 5, 2014
    Date of Patent: January 31, 2017
    Assignee: USHIO DENKI KABUSHIKI KAISHA
    Inventor: Tatsuya Motoike
  • Patent number: 9445484
    Abstract: In the case where luminance of light to be irradiated onto a multi-screen is not homogenized over the entire multi-screen, each of an image display apparatus and image display apparatuses carries out a homogenizing process of light to be irradiated onto a multi-screen over the entire multi-screen.
    Type: Grant
    Filed: December 5, 2012
    Date of Patent: September 13, 2016
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Isao Yoneoka, Yoshinori Asamura, Takashi Matoba
  • Patent number: 9398655
    Abstract: A circuit for actuating semiconductor light-emitting elements, wherein the circuit is supplied by a rectified mains voltage, may include at least two series-connected segments, which each have one or more series-connected semiconductor light-emitting elements, wherein the semiconductor light-emitting elements in at least two of the segments are different, which results in different forward voltages of the segments, and in each case one driver for actuating a segment, wherein the driver has at least one electronic switch, by means of which the segment may be bypassed, wherein the circuit arrangement is designed to decide to bypass the segment assigned to the circuit arrangement, on the basis of an instantaneous value of the rectified mains voltage and on the basis of the bypass state of the adjacent segments.
    Type: Grant
    Filed: May 2, 2013
    Date of Patent: July 19, 2016
    Assignee: OSRAM GMBH
    Inventor: Arnulf Rupp
  • Patent number: 9380656
    Abstract: The present invention relates to a power control unit (40; 60) for controlling electrical power provided to a load (12), in particular an LED unit (12) comprising one or more LEDs, said driver device comprising a converter unit (10) having an input terminal (42) for receiving an input voltage (V10) from an external power supply (22) and having an output terminal (44) for providing an output voltage (V14) to power the load (12), wherein the converter unit (10) comprises a switching device (14) for transforming the input voltage (V10) to the output voltage (V14), a control unit (20) for controlling the switching device (14), signal means (46; 62) connected to the output terminal (44) for applying a voltage or current signal to the output terminal (44), wherein the control unit (20) is connected to the signal means (46; 62) and adapted to control the signal means (46; 62).
    Type: Grant
    Filed: September 5, 2012
    Date of Patent: June 28, 2016
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventor: Harald Josef Günther Radermacher
  • Patent number: 9370059
    Abstract: A driving apparatus configured to drive a light emitting device includes a driving current source module operable to supply current to the light emitting device via a node during operation. A protection module coupled to the node and the driving current source module selectively injects current to the node during operation. The driving current source module is controlled based on a detection result of a voltage on the node.
    Type: Grant
    Filed: August 8, 2014
    Date of Patent: June 14, 2016
    Assignee: STMICROELECTRONICS (SHENZHEN) R&D CO. LTD.
    Inventors: Yi Jun Duan, Tao Tao Huang
  • Patent number: 9326340
    Abstract: The invention relates to a circuit arrangement (1) for controlling at least one load (D1, D2, D3). In order to provide means for extracting an auxiliary power supply from a current source in order to control shunt switching, the inventive circuit arrangement (1) comprises an input terminal (11) for connection to a power supply (30), an output terminal (12) for connection to at least one load element (20, 21, 22, 23), a control circuit (10), comprising a control device (13), which is adapted to control at least one load element (20, 21, 22, 23), and an energy storage device (C), which is adapted to supply power to the control device (13). A controllable bypass switch (M4) is further provided, wherein said bypass switch (M4) and said control circuit (10) are connected in parallel and are connected between said input terminal (11) and said output terminal (12). The circuit arrangement (1) is adapted to operate the bypass switch (M4) to control the power provided to the control circuit.
    Type: Grant
    Filed: March 8, 2013
    Date of Patent: April 26, 2016
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Kumar Arulandu, Carsten Deppe, Georg Sauerländer
  • Patent number: 9313839
    Abstract: An LED lighting device includes multiple luminescent devices driven by a rectified AC voltage. The multiple luminescent devices are turned on flexibly in a multi-stage driving scheme using multiple current controllers. The current settings of the two driving stages with the highest current level and the second highest current level are adjusted according to the variation in the rectified AC voltage VAC or according to the variation in the duty cycle of the luminance device due to the variation in the rectified AC voltage. The present invention can improve the line/load regulation of the LED lighting device when the rectified AC voltage somehow fluctuates between its upper bound and lower bound.
    Type: Grant
    Filed: March 18, 2015
    Date of Patent: April 12, 2016
    Assignee: IML International
    Inventors: Alberto Giovanni Viviani, Dimitry Goder, Chun Lu, Kai-Yun Cheng
  • Patent number: 9301364
    Abstract: The disclosure regards to drivers and driving methods for a LED string consisting of LEDs. The LED string and a current switch are coupled in series between a power line and a ground line. The power line is powered to regulate a signal representing a current passing through the LED string. An enable signal capable of switching the current switch is provided. Whether a predetermined event occurs is detected. When the predetermined event occurs, the enable signal is clamped to have a predetermined logic value, the current switch thereby being kept either open or short.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: March 29, 2016
    Assignee: LEADTREND TECHNOLOGY CORPORATION
    Inventor: Ching-Tsan Lee
  • Patent number: 9295114
    Abstract: An LED light unit, in particular for a passenger transport vehicle, such as an aircraft, a road vehicle, a ship or a rail car, is disclosed that has at least one LED and is configured to be used with a high intensity discharge lamp power supply that is adapted to monitor its output behavior. The LED light unit comprises a power input coupleable to the high intensity discharge lamp power supply, a capacitor switchably coupled to the power input for absorbing electrical energy from the high intensity discharge lamp power supply, and a power dissipating element switchably coupled to the power input for dissipating electrical energy from the high intensity discharge lamp power supply.
    Type: Grant
    Filed: April 25, 2014
    Date of Patent: March 22, 2016
    Assignee: GOODRICH LIGHTING SYSTEMS GMBH
    Inventors: Robert Trinschek, Andre Hessling von Heimendahl, Steffen Roebke
  • Patent number: 9220140
    Abstract: A light-emitting diode (LED) lighting driver is provided, which includes a bridge rectifier, multiple LED sections, multiple shunt regulators, a weighted current mirror array, a mean power integrator, and a reference generator. The bridge rectifier provides a rectified sinusoidal voltage. The LED sections are coupled in series and coupled to the rectified sinusoidal voltage. Each shunt regulators regulates a shunt current flowing out from the LED sections according to a current reference value. The weighted current mirror array provides a plurality of copy currents. Each copy currents tracks the conduction time of one shunt regulator and also tracks the instantaneous output power of the LED sections. The mean power integrator provides a mean power value by integrating the copy currents. The reference generator provides the current reference values. Each current reference values is directly proportional to the difference between a mean power reference value and the mean power value.
    Type: Grant
    Filed: October 25, 2012
    Date of Patent: December 22, 2015
    Assignee: GREENMARK TECHNOLOGY INC.
    Inventors: Kwang-Hwa Liu, Shen-Yao Liang
  • Patent number: 9204510
    Abstract: In an embodiment, a lamp control circuit is provided. The lamp control circuit includes an intermediate current steering block configured to be coupled to a cathode of a first light-emitting device of a plurality of light-emitting devices and a final current steering block configured to be coupled to a cathode of a final light-emitting device of the plurality of light-emitting devices. The final current steering block is configured to disable the intermediate current steering block and conduct current when a voltage input to the plurality of light-emitting devices is sufficient to activate all of the plurality of light-emitting devices.
    Type: Grant
    Filed: June 2, 2014
    Date of Patent: December 1, 2015
    Assignee: iSine, Inc.
    Inventor: Louis J. Morales
  • Patent number: 9198242
    Abstract: An apparatus for driving LEDs using high voltage includes a plurality of LEDs divided into a plurality of LED segments connected in series with a switching voltage detector and a current limiting device. Each of the plurality of LED segments is connected in parallel with a switching device. A high input voltage supplies power to the apparatus. The switching voltage detector generates a first mode change signal when the input voltage increases and a second mode change signal when the input voltage decreases. A switch controller receives the two mode change signals and generates a plurality of switching control signals to respectively control the switching devices of the plurality of LED segments.
    Type: Grant
    Filed: February 7, 2014
    Date of Patent: November 24, 2015
    Assignee: VastView Technology Inc.
    Inventors: Hung-Chi Chu, YuhRen Shen