Electric Switch Controlled Load Device Patents (Class 315/193)
  • Patent number: 11002587
    Abstract: An ultrasonic level sensor includes: a housing; an ultrasonic transducer having a face surface for emitting an ultrasonic signal; a reflector with a flat surface positioned at an angle with respect to the face surface of the ultrasonic transducer for reflecting and directing the ultrasonic signal to a surface of a material in a container; and a scattering structure to reflect unwanted scattered ultrasonic signals away from the surface of the liquid, wherein the ultrasonic signal is reflected from the surface of the material and from the flat surface of the reflector and received by the ultrasonic transducer.
    Type: Grant
    Filed: July 19, 2019
    Date of Patent: May 11, 2021
    Assignee: FLOWLINE, INC.
    Inventors: Larry Elvert Carter, Michael Richard Ehlert, Michael Joseph Rafferty
  • Patent number: 10986716
    Abstract: The anti-fouling load arrangement uses the hull of a vessel as one plate of a capacitor to capacitively couple an electrode of the anti-fouling load arrangement to a power source within the hull. The other electrode of the anti-fouling load arrangement receives current from the power source via a wire, or via the conductivity of the sea water, which may be enhanced by the presence of a conductive plate on the surface of the water. A plurality of anti-fouling load arrangements may be applied to the hull as flexible tiles, or rigid tiles that conform to the shape of the hull.
    Type: Grant
    Filed: January 14, 2020
    Date of Patent: April 20, 2021
    Assignee: Koninklijke Philips N.V.
    Inventor: Martinus Hermanus Wilhelmus Maria Van Delden
  • Patent number: 10976041
    Abstract: The invention relates to a lighting device comprising at least two light-emitting elements and a method of producing a lighting device. The light-emitting elements are connected with each other into a module via a connection element. The connection element has at least one region spaced apart from the at least two light-emitting elements. At least two modules are connected with each other in parallel. The at least one region of the connection element has a specific electrical resistance that compensate differences between electrical characteristics of at least two light-emitting elements.
    Type: Grant
    Filed: January 7, 2020
    Date of Patent: April 13, 2021
    Assignee: Lumileds LLC
    Inventors: Manuel Grave, Udo Karbowski
  • Patent number: 10939526
    Abstract: A driver circuit for lighting applications that includes a power input circuit for receiving power; a light emitting diode (LED) output current circuit for interfacing with a light source; and a light emitting diode (LED) power supply circuit for controlling current to the light emitting diode (LED) output current circuit. A controller circuit is present in the circuit for signaling the light emitting power supply (LED) to control current to the light emitting diode (LED) output current circuit. The controller is reset by removing power to the controller. A smoothing capacitor is present for stabilizing at least an output voltage. The circuit further includes a current rectifying circuit that prohibits back current traveling from the smoothing capacitor to the controller circuit when the AC power is off.
    Type: Grant
    Filed: April 30, 2020
    Date of Patent: March 2, 2021
    Assignee: LEDVANCE LLC
    Inventors: Yuhao Liu, Nilesh Patel, Ming Li
  • Patent number: 10914288
    Abstract: The invention relates to a method for controlling a wind turbine configured with an on load tap changer transformer which enables adjustment of a current ratio of a primary side current of the transformer and a secondary side current of the transformer. The method comprises detecting that a network voltage on the primary side or secondary side of the transformer is outside a pre-determined voltage range, and in response determining a current reference for the primary side current based on the detected network voltage. The power converter of the wind turbine is controlled to generate an increase of the primary side current towards the current reference, and the current ratio of the transformer is adjusted towards a higher ratio of the current ratio.
    Type: Grant
    Filed: July 5, 2019
    Date of Patent: February 9, 2021
    Assignee: VESTAS WIND SYSTEMS A/S
    Inventors: Jesper Hillebrandt, Philip Carne Kjær
  • Patent number: 10910975
    Abstract: The invention relates to a method for controlling a wind turbine which comprises a transformer has a variable turns ratio such as an on load tap changer transformer. The adjustment of the turns ratio is possible when a primary side current or a secondary side current of the transformer is less than a switching current threshold. The method comprises operating the wind turbine so that the primary or secondary side current is above the switching current threshold. In response to obtaining a condition for changing the turns ratio of the transformer, the wind turbine is operated so that the primary or secondary side current is reduced below the switching current threshold so that the turns ratio can be changed during the temporary current reduction.
    Type: Grant
    Filed: July 5, 2019
    Date of Patent: February 2, 2021
    Assignee: VESTAS WIND SYSTEMS A/S
    Inventors: Jesper Hillebrandt, Philip Carne Kjær
  • Patent number: 10890300
    Abstract: An LED tube lamp includes a lamp tube; an LED light strip disposed inside the lamp tube and comprising a mounting region and a connecting region, a plurality of LED light sources mounted on the mounting region and at least two first connecting pads arranged on the connecting region; a fixing structure disposed inside the lamp tube and extending along the longitudinal direction of the lamp tube, the fixing structure comprising a first end fixedly connected to an inner circumferential surface of the lamp tube and second end fixedly connected to the LED light strip; a power supply module disposed on the fixing structure and electrically connecting to the LED light strip via the two first connecting pads, the power supply module comprising a circuit board separate from the light strip and a plurality of electronic components mounted on the circuit board; and two end caps attached to two ends of the lamp tube respectively.
    Type: Grant
    Filed: November 22, 2019
    Date of Patent: January 12, 2021
    Assignee: Jiaxing Super Lighting Electric Appliance Co., Ltd.
    Inventors: Aiming Xiong, Qifeng Ye, Yueqiang Zhang
  • Patent number: 10796648
    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: July 15, 2019
    Date of Patent: October 6, 2020
    Assignee: Apple Inc.
    Inventors: Kapil V. Sakariya, Andreas Bibl, Kelly McGroddy
  • Patent number: 10743388
    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 23, 2018
    Date of Patent: August 11, 2020
    Assignee: Racepoint Energy, LLC
    Inventor: William Lark, Jr.
  • Patent number: 10674585
    Abstract: A driver circuit for lighting applications that includes a power input circuit for receiving power; a light emitting diode (LED) output current circuit for interfacing with a light source; and a light emitting diode (LED) power supply circuit for controlling current to the light emitting diode (LED) output current circuit. A controller circuit is present in the circuit for signaling the light emitting power supply (LED) to control current to the light emitting diode (LED) output current circuit. The controller is reset by removing power to the controller. A smoothing capacitor is present for stabilizing at least an output voltage. The circuit further includes a current rectifying circuit that prohibits back current traveling from the smoothing capacitor to the controller circuit when the AC power is off.
    Type: Grant
    Filed: April 30, 2019
    Date of Patent: June 2, 2020
    Assignee: LEDVANCE LLC
    Inventors: Yuhao Liu, Nilesh Patel, Ming Li
  • Patent number: 10652960
    Abstract: A power converter for an LED drive circuit, can include: a capacitor and an LED load coupled in parallel to receive an output signal of a rectifier circuit; a power switch coupled in series with the LED load, and being configured to control a current path from the rectifier circuit to the LED load; and a control circuit configured to control the power switch to be turned off in accordance with an error between an output current flowing through the LED load and a desired current value to decrease power consumption of the power switch, where the operation of the power switch is controlled to transition between on and off states in each sinusoidal half-wave period.
    Type: Grant
    Filed: December 3, 2018
    Date of Patent: May 12, 2020
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Qiukai Huang, Jianxin Wang, Qingliang Zheng
  • Patent number: 10582579
    Abstract: A controller circuit for controlling a switching-mode power supply (SMPS) is configured to receive a load control signal indicating an on state when a load is to be coupled to the SMPS and an off state when the load is not to be coupled to the SMPS. In response to the load control signal transitioning from the on state to the off state, the controller circuit is configured to generate a first measured input voltage. In response to the load control signal transitioning from the off state to the on state, the controller circuit is configured to generate a second measured input voltage. The controller circuit is configured to drive a compensation voltage at a compensation element using the first measured input voltage and the second measured input voltage and selectively switch the SMPS using the compensation voltage after driving the compensation voltage.
    Type: Grant
    Filed: February 4, 2019
    Date of Patent: March 3, 2020
    Assignee: Infineon Technologies AG
    Inventors: Paolo Milanesi, Roberto Penzo
  • Patent number: 10554204
    Abstract: Techniques for an integrated slew-rate control circuit are provided. In certain examples, an adjustable, integrated slew-rate control circuit for a bypass transistor can provide three decades of adjustability. In an example, a slew-rate control circuit can include a load bypass transistor, a slew-rate control capacitor, electrically coupled between a conduction node of the load bypass transistor and a control node of the load bypass transistor, and a current mirror circuit. The current mirror circuit can include a sense transistor electrically coupled in series with the slew-rate control capacitor and the control node, and a mirror transistor electrically coupled between a power supply and the control node, to selectively provide, to or from the control node, a shunt current that bypasses the slew-rate control capacitor to limit a slew rate of a voltage at the conduction node.
    Type: Grant
    Filed: December 20, 2018
    Date of Patent: February 4, 2020
    Assignee: Analog Devices, Inc.
    Inventors: Eric Stephen Young, Xin Qi
  • Patent number: 10555389
    Abstract: Aspects of the subject technology relate to display of an electronic device. The display includes a backlight unit having a voltage source, a string of light-emitting diodes and a bypass switch for each light-emitting diode in the string. The string of light-emitting diodes can receive, at a first end, a supply voltage from the voltage source. The bypass switch for each light-emitting diode is controllable to pulse-width-modulate that light-emitting diode. The headroom voltage feedback circuit is coupled to a second end of the string.
    Type: Grant
    Filed: December 26, 2018
    Date of Patent: February 4, 2020
    Assignee: Apple Inc.
    Inventors: Yanhui Xie, Asif Hussain, Jingdong Chen, Manisha P. Pandya
  • Patent number: 10541615
    Abstract: Techniques and mechanisms for mitigating an overshoot of a supply voltage provided with a voltage regulator (VR). In an embodiment, buck converter functionality of a VR is provided with first circuitry comprising a first inductor and first switch circuits variously coupled thereto. Second circuitry of the VR comprises a second inductor and second switch circuits variously coupled thereto. In response to an indication of a voltage overshoot condition, respective states of the first switch circuits and the second switch circuits are configured to enable a conductive path for dissipating energy with the first inductor, the second inductor, and various ones of the first switch circuits and the second switch circuits. In another embodiment, mitigating the voltage overshoot condition comprises alternately toggling between two different configurations of the second switch circuits.
    Type: Grant
    Filed: June 28, 2018
    Date of Patent: January 21, 2020
    Assignee: Intel Corporation
    Inventors: Amit Jain, Sameer Shekhar, Alexander Lyakhov, Jonathan P. Douglas, Vivek Saxena
  • Patent number: 10524324
    Abstract: Lighting fixtures and methods for controlling operation of lighting fixtures are provided. In one example implementation, a lighting fixture includes a first LED array associated with a first color temperature, and a second LED array associated with a second color temperature. The lighting fixture further includes a circuit configured to adjust a power distribution amongst the first LED array and the second LED array based at least in part on a detected toggle input to adjust a color temperature of light output by the lighting fixture.
    Type: Grant
    Filed: January 11, 2019
    Date of Patent: December 31, 2019
    Assignee: Hubbell Incorporated
    Inventors: Pritam Yadav, T. Warren Weeks, Jr., Douglas M. Hamilton
  • Patent number: 10506677
    Abstract: A light source device includes: a semiconductor light source; a switching element connected in series to the semiconductor light source; a drive circuit that turns on the switching element when a first control signal based on a PWM signal is in a first logic state; a switching power supply circuit that supplies a current to the semiconductor light source; a current detection element that detects a current flowing through the semiconductor light source and generates a current detection signal; a current detection circuit that sample-holds a current detection signal for a period shorter than an activation period of the PWM signal; an error amplifier that generates an error signal by amplifying the difference between a current control signal and an output signal of the current detection circuit; and a control circuit that generates a second control signal for controlling the switching power supply circuit based on the error signal.
    Type: Grant
    Filed: January 25, 2019
    Date of Patent: December 10, 2019
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Atsushi Yamada
  • Patent number: 10485069
    Abstract: An illuminating apparatus includes a first light emitter, a second light emitter which emits light including more predefined color components than light emitted by the first light emitter, and a lighting device which supplies current modulated according to a visible light communication signal, to the first light emitter. The lighting device supplies a constant current to the second light emitter, while the first light emitter is supplied with current.
    Type: Grant
    Filed: May 20, 2018
    Date of Patent: November 19, 2019
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Keisuke Seki, Shigeru Ido, Kazuhiko Hayashi
  • Patent number: 10470273
    Abstract: A light emission drive device includes a current supply unit, which supplies driving current to a light emitting element, which performs light emission of a first function and light emission of a second function, a controller, which controls the driving current so as to have a current value depending on a dimming voltage, and a dimming voltage generator, which generates the dimming voltage. The dimming voltage generator applies a voltage, obtained according to the resistance value of a connected external resistor, to a voltage buffer, and controls the output voltage of the voltage buffer according to whether to perform light emission of any one of the first function and the second function so as to generate the dimming voltage.
    Type: Grant
    Filed: May 17, 2018
    Date of Patent: November 5, 2019
    Assignee: Koito Manufacturing Co., Ltd.
    Inventors: Kotaro Matsui, Yasushi Noyori
  • Patent number: 10448471
    Abstract: Certain aspects involve lighting systems in which a dimming curve of the illumination can be selectively modified. For instance, a lighting system includes a light source configured for emitting light at a target color temperature and a switch configured to receive a selection of a dimming curve from a predefined set of dimming curves. When in a first position, the switch configures the light source to adjust a lumen intensity of the light source according to a dimming adjustment signal and a first dimming curve. When in a second position, the switch configures the light source to adjust the lumen intensity according to a dimming adjustment signal and a second dimming curve that is different from the first dimming curve.
    Type: Grant
    Filed: June 29, 2018
    Date of Patent: October 15, 2019
    Assignee: ABL IP Holding LLC
    Inventors: Towfiq M. Chowdhury, Feng Chen
  • Patent number: 10426008
    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: December 21, 2018
    Date of Patent: September 24, 2019
    Assignee: Exar Corporation
    Inventor: Jon Elliott Cronk
  • Patent number: 10408663
    Abstract: An ultrasonic level sensor includes: a housing; an ultrasonic transducer having a face surface for emitting an ultrasonic signal; a reflector with a flat surface positioned at an angle with respect to the face surface of the ultrasonic transducer for reflecting and directing the ultrasonic signal to a surface of a material in a container; and a scattering structure to reflect unwanted scattered ultrasonic signals away from the surface of the liquid, wherein the ultrasonic signal is reflected from the surface of the material and from the flat surface of the reflector and received by the ultrasonic transducer.
    Type: Grant
    Filed: February 15, 2017
    Date of Patent: September 10, 2019
    Assignee: FLOWLINE, INC.
    Inventors: Larry Elvert Carter, Michael Richard Ehlert, Michael Joseph Rafferty
  • Patent number: 10400963
    Abstract: A light string includes a controller and a plurality of colorful light beads. The controller is electrically connected with the light beads and an AC electric supply, and the light beads are connected in series. Two voltage supply lines power the light beads, and control signals from the controller are fused with the power signal and passed to the light beads via the negative pole. The control signal is recognized by each light bead and also passed to the next light bead in the series, to produce a change in the output of each light bead (e.g., color, flashing pattern, etc.). The light beads include three LEDs of different color and can produce seven different colors. Multiple light segments can be connected and controlled by the same controller. The light string design is simple, yet versatile, offering many illumination outputs selectable by a user.
    Type: Grant
    Filed: December 15, 2017
    Date of Patent: September 3, 2019
    Assignee: Shandong Neon King Electronics Co., Ltd.
    Inventor: Qing En Zhao
  • 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