Impedance Or Current Regulator In The Supply Circuit Patents (Class 315/224)
  • Patent number: 10973101
    Abstract: A single-stage driver for an LED device, configured to be coupled between a power supply and the LED device, comprises: a rectifier, a DC-to-DC converter, a resistor and a controller. The rectifier is configured to be coupled to the power supply and convert an alternating voltage from the power supply into a first direct voltage. The DC-to-DC converter, which comprises at least two switches, is coupled between the rectifier and the LED device and configured to receive the first direct voltage and provide a constant current to the LED device. The resistor is configured to be coupled in series with the LED device. The controller is coupled between the resistor and the at least two switches, and configured to keep the current through the LED device stable around a predetermined current value by controlling the switches based on a voltage across the resistor, wherein all the at least two switches are turned on or off synchronously.
    Type: Grant
    Filed: August 7, 2019
    Date of Patent: April 6, 2021
    Assignee: CURRENT LIGHTING SOLUTIONS, LLC
    Inventors: Zhu Mao, Min Fang, Zhangji Zhou, Shuyi Qin, Fanbin Wang
  • Patent number: 10962205
    Abstract: Systems for emergency exit LED lighting are described herein. The emergency exit lighting systems comprise structures for housing at least one LED light, an LED driver electronically coupled to the LED light(s), a continuous power source, a backup power source, and a test switch. The fixtures, in various configurations, may be mounted to an existing T-grid or to a wall or ceiling. The fixture may be tested remotely.
    Type: Grant
    Filed: June 17, 2019
    Date of Patent: March 30, 2021
    Inventors: Nicole Bagozzi, Scott Evans, Nicholas Garthright, Joseph Marino, Lee Marino
  • Patent number: 10959307
    Abstract: A load control device coupled between an AC power source and an electrical load may operate in a three-wire mode or a two-wire mode based on whether the load control device is connected to a neutral side of the AC power source. The load control device may further comprise first and second zero-cross detect circuits to be respectively used in the two-wire mode or the three-wire mode, and a neutral wire detect circuit configured to generate a neutral wire detect signal indicating whether the load control device is connected to the neutral side of the AC power source. A control circuit of the load control device may determine whether the load control device should operate in the two-wire mode or in the three-wire mode in response to the neutral wire detect signal.
    Type: Grant
    Filed: November 26, 2019
    Date of Patent: March 23, 2021
    Assignee: Lutron Technology Company LLC
    Inventors: Mark A. Benning, Thomas W. Brenner, Quinn Brogan, Donald F. Hausman, Jr., Peter MacLellan, Matthew Kyle Olsen, Matthew Pennock
  • Patent number: 10952299
    Abstract: A resonant power converter as disclosed herein, e.g., an LED driver, comprises first and second switches in a half-bridge arrangement and responsive at an operating frequency to controlled drive signals. A resonant circuit is coupled between the switch output and an isolation transformer. A negative feedback control loop provides an error signal for regulation of the output current. A reference control circuit is added to the feedback control loop, and configured to sense when the error signal exceeds a threshold value, and further configured in response to control a feedback reference signal wherein the error signal is reset to a value below the threshold value. By resetting the feedback control reference value, loop runaway may be prevented, e.g., for enough time that the LED load may warm up or otherwise stabilize. As a result the LED driver will always maintain negative current closed loop control, and restore normal operating mode.
    Type: Grant
    Filed: February 28, 2020
    Date of Patent: March 16, 2021
    Assignee: Universal Lighting Technologies, Inc.
    Inventors: Wei Xiong, Scott Price
  • Patent number: 10944316
    Abstract: A circuit adapted to detect applied voltage and/or voltage based conditions. The circuit comprises a zero-cross detection circuit and a controller. The zero-cross detection circuit is adapted to output a zero-cross signal comprising zero-cross events based on an applied alternating current power signal. The controller is adapted to store a relationship between a pulse width delta, frequency, and voltage. The controller is adapted to sense the zero-cross signal from the zero-cross detection circuit to determine its frequency and pulse width delta by calculating a difference between a high-time and a low-time of the zero-cross signal, and determine the applied voltage based on the stored relationship. The controller can adjust at least one setting of the circuit based on the determined applied voltage, such as the timing of a dimming circuit. In another embodiment, the controller may directly detect voltage based conditions, such as zero-cross delays a dimmer circuit.
    Type: Grant
    Filed: January 16, 2019
    Date of Patent: March 9, 2021
    Assignee: Crestron Electronics, Inc.
    Inventors: Benjamin Slivka, Martin Koenig
  • Patent number: 10939520
    Abstract: Methods, devices, and systems for a current converter circuit for airfield ground lighting are described herein. In some examples, one or more embodiments include a bi-directional switch, an inductor to store energy in response to the bi-directional switch being on, and an output capacitor to discharge power to an LED, where the bi-directional switch can switch off to cause the inductor to discharge to the output capacitor in response to a voltage across the output capacitor being less than a threshold voltage.
    Type: Grant
    Filed: March 10, 2020
    Date of Patent: March 2, 2021
    Assignee: Honeywell International Inc.
    Inventor: Nipun Kumar Chawda
  • Patent number: 10918747
    Abstract: Methods, systems, and devices for inactivating microorganisms are disclosed. An example method comprises emitting, with a first light source, a first light comprising a first correlated color temperature (CCT), emitting, with a second light source, a second light comprising a second CCT and, varying respective power levels of the first light source and the second light source such that the first light and the second light combine to form white light comprising an intensity associated with light in a 380-420 nanometer (nm) wavelength range sufficient to initiate inactivation of microorganisms on the surface and a third CCT between the first CCT and the second CCT.
    Type: Grant
    Filed: June 28, 2019
    Date of Patent: February 16, 2021
    Assignee: Vital Vio, Inc.
    Inventors: Robert Barron, Jorel Lalicki, James W. Peterson, Nicholas Jones, Cori J. Winslow
  • Patent number: 10904977
    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: April 10, 2019
    Date of Patent: January 26, 2021
    Assignee: Texas Instruments Incorporated
    Inventors: Michael James Drake, Daniel Ross Herrington, Sumeet Prakash Kulkarni, Vahid Yousefzadeh, James Michael Patterson, James Harbison Masson
  • Patent number: 10887957
    Abstract: An LED drive circuit with a SCR dimmer, a circuit module and a control method therefor are provided. In each cycle of the alternating current, the bleeding current during a time period for turning on the SCR dimmer is distinguished from the bleeding current in a time period from an instant at which the SCR dimmer is turned on to an instant at which the LED load is lit. The bleeder circuit is controlled to perform bleeding at the first current during the time period for turning on the SCR dimmer, and then perform bleeding at the second current which is less than the first current from the instant at which the SCR dimmer is turned on, so that an average bleeding current of the bleeder circuit in each cycle can be reduced, the bleed loss can be reduced, and the efficiency of the LED drive circuit can be improved.
    Type: Grant
    Filed: June 21, 2019
    Date of Patent: January 5, 2021
    Assignee: SILERGY SEMICONDUCTOR TECHNOLOGY (HANGZHOU) LTD
    Inventors: Huiqiang Chen, Jianxin Wang
  • Patent number: 10856382
    Abstract: An active preload circuit includes: a rectifier configured to receive an AC input from a TRIAC dimmer and to generate DC power; a preload; and a phase angle controller configured to selectively couple the preload to the DC power.
    Type: Grant
    Filed: May 11, 2018
    Date of Patent: December 1, 2020
    Assignee: ERP POWER, LLC
    Inventor: Louis Chen
  • Patent number: 10841991
    Abstract: Methods of operating a dimmer switch interface are described. A method includes receiving a dimmer input voltage, providing a dimmer output signal based on the dimmer input voltage, and detecting a voltage level of the dimmer output signal. The voltage level of the dimmer output signal is compared with the threshold. A transformer is intermittently turned off when the voltage level of the dimmer output signal is below the threshold.
    Type: Grant
    Filed: October 25, 2019
    Date of Patent: November 17, 2020
    Assignee: Lumileds LLC
    Inventor: Zhi Hua Song
  • Patent number: 10827588
    Abstract: System and method for controlling one or more light emitting diodes. For example, the system for controlling one or more light emitting diodes includes a current regulation circuit coupled to a cathode of one or more light emitting diodes. The one or more light emitting diodes include the cathode and an anode configured to receive a rectified voltage. Additionally, the system includes a control circuit coupled to the cathode of the one or more light emitting diodes. The control circuit is configured to receive a first voltage from the cathode of the one or more light emitting diodes, compare a second voltage and a threshold voltage, and generate a control signal based at least in part on the second voltage and the threshold voltage. The second voltage indicates a magnitude of the first voltage.
    Type: Grant
    Filed: December 19, 2018
    Date of Patent: November 3, 2020
    Assignee: On-Bright Electronics (Shanghai) Co., Ltd.
    Inventors: Liqiang Zhu, Jun Zhou
  • Patent number: 10800317
    Abstract: A vehicle lamp includes: a first light source; a second light source; a first input terminal that receives a first turn-on instruction signal of the first light source; a second input terminal that receives a pulsed second turn-on instruction signal of the second light source; and a turn-on circuit that drives the first light source and the second light source based on the first turn-on instruction signal and the second turn-on instruction signal. The turn-on circuit includes: a drive circuit that becomes active based on the first turn-on instruction signal and the second turn-on instruction signal, and outputs a constant drive current from an output terminal; and a distribution circuit that forms a current path such that the drive current flows to the second light source, and forms a current path such that the drive current flows to the first light source.
    Type: Grant
    Filed: January 21, 2020
    Date of Patent: October 13, 2020
    Assignee: KOITO MANUFACTURING CO., LTD.
    Inventors: Tomoyuki Ichikawa, Takuya Serita, Masato Harazaki
  • Patent number: 10790762
    Abstract: A power adaptor is disclosed, which comprises an input for connection to an AC power supply, a resonant circuit coupled to the input that provides an output suitable for driving a load, at least one half-bridge drive circuit for providing a drive signal to the resonant circuit, and a switch controller for the half-bridge drive circuit. The switch controller is adapted to provide one or more of the following, in at least one mode: (i) to provide the high-side switch and the low-side switch with on-times of different durations, (ii) to provide the high-side switch and the low-side switch with on-times that overlap, and (iii) to provide the high-side switch and the low-side switch with on-times that are synchronous. This may be utilised to control the current delivered to the output without any need to change the frequency at which the resonant circuit is driven.
    Type: Grant
    Filed: May 23, 2014
    Date of Patent: September 29, 2020
    Assignee: ADP CORPORATE LIMITED
    Inventor: David Summerland
  • Patent number: 10757773
    Abstract: A load control device for controlling the intensity of a lighting load, such as a light-emitting diode (LED) light source, may include a power converter circuit operable to receive a rectified AC voltage and to generate a DC bus voltage, a load regulation circuit operable to receive the bus voltage and to control the magnitude of a load current conducted through the lighting load, and a control circuit operatively coupled to the load regulation circuit for pulse width modulating or pulse frequency modulating the load current to control the intensity of the lighting load to a target intensity. The control circuit may control the intensity of the lighting load by pulse width modulating the load current when the target intensity is above a predetermined threshold and control the intensity of the lighting load by pulse frequency modulating the load current when the target intensity is below the predetermined threshold.
    Type: Grant
    Filed: October 15, 2019
    Date of Patent: August 25, 2020
    Assignee: Lutron Technology Company LLC
    Inventors: Timothy P. Gredler, Matthew R. Zartman
  • Patent number: 10728985
    Abstract: A lighting circuit of a semiconductor light source includes a light control circuit and a constant current circuit. The light control circuit is configured to generate a pulsed light control signal having a duty ratio corresponding to the input pulse signal and having at least one edge softened in each pulse. The constant current circuit includes a linear regulator. The constant current circuit is configured to stabilize a lamp current flowing into the semiconductor light source to a target amount corresponding to the light control signal.
    Type: Grant
    Filed: October 4, 2019
    Date of Patent: July 28, 2020
    Assignee: KOITO MANUFACTURING CO., LTD.
    Inventor: Tomoyuki Ichikawa
  • Patent number: 10714313
    Abstract: The invention relates to high-frequency amplifier apparatuses suitable for generating power outputs of at least 1 kW at frequencies of at least 2 MHz. The apparatuses include two LDMOS transistors each connected by their source connection to ground. The transistors can have the same design and can be arranged in an assembly (package). The apparatus also includes a circuit board lying flat against a metallic cooling plate and connected to the cooling plate, which can be connected to ground, and the assembly is arranged on or against the circuit board. The apparatuses have a power transformer, whose primary winding is connected to the drain connections of the transistors, and a signal transmitter. A secondary winding of the signal transmitter is connected to the gate connections of the two transistors. Each of the gate connections is connected to ground via at least one voltage-limiting structural element.
    Type: Grant
    Filed: December 26, 2017
    Date of Patent: July 14, 2020
    Assignee: TRUMPF Huettinger GmbH + Co. KG
    Inventors: Andre Grede, Alexander Alt, Daniel Gruner, Anton Labanc
  • Patent number: 10687401
    Abstract: A linear constant current drive circuit, including a first end of an LED string is connected to one output end of a rectifier bridge, a second end of the LED string is connected to one end of an energy storage capacitor by using a first switch subcircuit, and the other end of the energy storage capacitor is connected to the other output end of the rectifier bridge; one end of a second switch subcircuit is connected to a junction between the first switch subcircuit and the energy storage capacitor, and the other end of the second switch subcircuit is connected to a tap end of the LED string; and one end of a third switch subcircuit is connected to the second end of the LED string, and the other end of the third switch subcircuit is connected to a junction between the rectifier bridge and the energy storage capacitor.
    Type: Grant
    Filed: October 9, 2017
    Date of Patent: June 16, 2020
    Assignee: SHANGHAI LOOALL ELECTRONICS CO., LTD
    Inventor: Yunqi Shao
  • Patent number: 10681782
    Abstract: A light-emitting diode (LED) lighting device has an LED and a power supply including an inductor coupled to the LED. A cathode of the LED is coupled to the inductor opposite an anode of the LED. The inductor is coupled for receiving a first power signal. A transistor includes a conduction terminal coupled to the inductor to enable current through the inductor. A current from the first power signal is switched to generate a second power signal. A first diode includes an anode coupled to the inductor opposite the cathode of the LED. A controller includes a first terminal coupled to a cathode of the first diode and a second terminal coupled to a control terminal of the transistor. A zener diode is coupled to the first terminal of the controller. A capacitor is coupled between the first diode and inductor. A second diode is coupled to the first diode.
    Type: Grant
    Filed: September 9, 2016
    Date of Patent: June 9, 2020
    Assignee: Enertron, Inc.
    Inventors: Der Jeou Chou, Ming Yi Chan
  • Patent number: 10665162
    Abstract: A pixel of an organic light emitting diode (OLED) display device may include an organic light-emitting diode; a first transistor configured to control, in response to a voltage of a first node, current flowing from a first driving power source to a second driving power source that is coupled to a second node via the organic light-emitting diode; a second transistor coupled between a data line and the first node, and configured to be turned on when a first scan signal is supplied to a first scan line; a storage capacitor coupled between the first node and the first driving power source; and an auxiliary capacitor coupled between the first driving power source and the second node.
    Type: Grant
    Filed: May 18, 2018
    Date of Patent: May 26, 2020
    Assignee: Samsung Display Co., Ltd.
    Inventors: Hyo Chul Lee, Yoon Jung Chai
  • Patent number: 10651813
    Abstract: A method is provided to design a filter. In the method, a difference between a high frequency to be blocked and a resonance frequency of a distributed constant type reference filter is obtained, the reference filter including a reference coil having windings wound at a plurality of pitches having the same length in an axial direction and a capacitor connected in parallel to the reference coil. When the difference is greater than the predetermined value, a split position in the reference coil where the reference coil is divided into a first coil element and a second coil element connected in series and a split distance between the first coil element and the second coil element to reduce the first difference.
    Type: Grant
    Filed: June 20, 2017
    Date of Patent: May 12, 2020
    Assignee: Tokyo Electron Limited
    Inventors: Nozomu Nagashima, Naohiko Okunishi, Eiichiro Kikuchi
  • Patent number: 10651726
    Abstract: Techniques for starting up and shutting down a H-bridge are provided. In an example, a method can include ramping an internal reference voltage of the H-bridge between a first level and a second level during a first interval, controlling an output voltage of each of a first half-bridge of the H-bridge and a second half-bridge of the H-bridge independently during the first interval based on the reference voltage, and controlling the first half-bridge and second half-bridge as a full H-bridge during a second timed interval.
    Type: Grant
    Filed: May 2, 2019
    Date of Patent: May 12, 2020
    Assignee: Analog Devices International Unlimited Company
    Inventors: Hai Chen, Gregory J. Hughes
  • Patent number: 10644585
    Abstract: An apparatus includes an alternating current (AC) input node. The apparatus also includes a power factor correction (PFC) circuit with a first inductor coupled between the AC input node and a switch node. The apparatus also includes a switching analysis circuit for the PFC circuit. The switching analysis circuit includes a second inductor inductively coupled to the first inductor. The switching analysis circuit also includes a rectifier coupled to the second inductor. The switching analysis circuit also includes a sensing resistor coupled to the rectifier.
    Type: Grant
    Filed: November 13, 2018
    Date of Patent: May 5, 2020
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventor: Zhong Ye
  • Patent number: 10622894
    Abstract: A synchronous converter for driving a load (4) comprises a first switch (M1) coupled in series with a second switch (M2) via a node (x), an inductor (L1) coupled to the node (x), input terminals (10, 11) for receiving an input voltage (Vin) from a power source, output terminals (12, 13) for supplying an output current and an output voltage to the load (4), a first mode wherein the first switch (M1) is in an on state and the second switch (M2) is in an off state, and wherein the first switch and the inductor (L1) form a series arrangement coupled between the input terminals (10, 11), a second mode wherein the first switch (M1) is in the off state and the second switch (M2) is in the on state, and wherein the second switch (M2) and the inductor (L1) form a series arrangement coupled between the output terminals (12, 13).
    Type: Grant
    Filed: December 5, 2017
    Date of Patent: April 14, 2020
    Assignee: SIGNIFY HOLDING B.V.
    Inventors: Binghong Wang, Reinhold Elferich
  • Patent number: 10624162
    Abstract: A direct AC LED lighting device is provided with a variable current source and a controller. The controller controls the variable current source to conduct a THD compensation current while an LED string in the direct AC lighting device is not conducting to improve power factor and reduce the THD.
    Type: Grant
    Filed: March 21, 2018
    Date of Patent: April 14, 2020
    Assignee: DIALOG SEMICONDUCTOR INC.
    Inventors: Nan Shi, Haiju Li
  • Patent number: 10609788
    Abstract: A load regulation device is adapted to control an electrical load. The load regulation device may be in a low power state, a ready state, and/or an on state. The low power state is characterized by the electrical load being unenergized. The ready state is characterized by a load control device and/or the load regulation device using more power than the low power state and the electrical load being unenergized. The on state is characterized by the electrical load being energized. The load regulation device is configured to receive an indication of a user's presence when the load regulation device is in the low power state. The load regulation device is configured to change from the low power state to the ready state in response to receiving the indication. The load regulation device is configured to wait in the ready state for a change state instruction.
    Type: Grant
    Filed: June 19, 2019
    Date of Patent: March 31, 2020
    Assignee: Lutron Technology Company LLC
    Inventor: Matthew Knauss
  • Patent number: 10588185
    Abstract: The invention describes an LED tube lamp (1) realized for use with a high-frequency ballast (2), which LED tube lamp (1) comprises an LED arrangement (100); a driver (10) realized to drive the LED arrangement (100); and a first connecting terminal pair (11, 12) for connecting to first outputs (21, 22) of the high-frequency ballast (1) and a second connecting terminal pair (13, 14) for connecting to second outputs (23, 24) of the high-frequency ballast (2), and wherein the LED tube lamp (1) is characterized by a magnetically coupled inductor pair (L11, L12) comprising a first inductor (L11) in series with one terminal (11) of the first connecting terminal pair (11, 12) and a second inductor (L12) in series with the other terminal (12) of the first connecting terminal pair (11, 12). The invention further describes a LED tube lighting arrangement (3).
    Type: Grant
    Filed: September 8, 2016
    Date of Patent: March 10, 2020
    Assignee: SIGNIFY HOLDING B.V.
    Inventors: Patrick John Zijlstra, Frits Tobi De Jongh, Haimin Tao
  • Patent number: 10581267
    Abstract: The subject disclosure relates to an emergency lighting system for simulating power failure in an emergency lighting system. In some aspects, the system includes an interrupt relay coupled between a first power supply and a lighting array, a power monitoring module coupled between a second power supply and the lighting array, and a wireless transceiver configured for transacting data with a wireless backhaul gateway. Additionally, the lighting system can include a microcontroller configured to perform operations for receiving an interrupt command from the wireless backhaul gateway, toggling the interrupt relay in response to the interrupt command, wherein toggling the interrupt relay terminates power delivery to the lighting array, and measuring one or more power characteristics of the second power supply to determine if the second power supply can power the lighting array. Methods and machine-readable media are also provided.
    Type: Grant
    Filed: April 16, 2019
    Date of Patent: March 3, 2020
    Assignee: HEXMODAL TECHNOLOGIES LLC
    Inventors: Christopher Hariz, Utkarsh Shah
  • Patent number: 10582584
    Abstract: An LED security light includes a power supply unit comprising a first power source, a second power source and a power switching circuitry, wherein the power switching circuitry utilizes a detector to detect an available electric power in the first power source or in the second power source, and operates with the available electric power detected as a criterion to selectively connect an LED load to at least one of the first power source and the second power source for performing an illumination mode in responding to signals generated by a light sensing unit, a motion sensor unit, or at least one external control unit. In an exemplar, the first power source is an AC power source or a solar power module, and the second power source is a battery unit or a rechargeable battery module.
    Type: Grant
    Filed: June 14, 2018
    Date of Patent: March 3, 2020
    Assignee: Vaxcel International Co., Ltd.
    Inventor: Chia-Teh Chen
  • Patent number: 10575377
    Abstract: A circuit includes a power supply circuit and a ripple reduction circuit. The power supply circuit supplies a Direct Current (DC) lighting current to a light emitting circuit. The lighting current has a ripple current at a ripple frequency. The ripple reduction circuit receives the lighting current, and performs, based on the received lighting current, Pulse Width Modulation (PWM) of the lighting current at a PWM frequency. The PWM frequency is higher than the ripple frequency. By performing the PWM, the ripple reduction current reduces variations in a magnitude of the lighting current at the ripple frequency. The PWM frequency may be higher than a frequency at which variations in the magnitude of the light produced by the lighting circuit have a harmful effect on the human eye.
    Type: Grant
    Filed: September 12, 2018
    Date of Patent: February 25, 2020
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventor: Hyunchul Eum
  • Patent number: 10535303
    Abstract: The present application discloses an organic light emitting display panel, a driving method thereof and an organic light emitting display apparatus. The organic light emitting display panel comprises: a pixel array, comprising pixel regions in M rows and N columns; a plurality of pixel driving circuits each comprising a light emitting diode and a driving transistor for driving the light emitting diode, the light emitting diode being arranged in one of the pixel regions; and a plurality of pixel compensation circuits, each configured to provide a compensated light emitting control signal for a gate of the driving transistor to correct brightness of the light emitting diode in one of the plurality of pixel driving circuits. According to the present disclosure, the final light emitting current may be unrelated to the threshold voltage of the driving transistor, the carrier mobility and aging of the light emitting diode.
    Type: Grant
    Filed: August 21, 2018
    Date of Patent: January 14, 2020
    Assignee: SHANGHAI TIANMA AM-OLED CO., LTD.
    Inventors: Dongxu Xiang, Yue Li, Renyuan Zhu, Tong Wu, Dong Qian, Zeyuan Chen, Gang Liu
  • Patent number: 10508798
    Abstract: In accordance with various embodiments, lighting systems features multiple inter-connectable light panels each having multiple light-emitting elements thereon. One or more of the light panels features one or more connectors, and associated conductors, for the transmission of power, communication signals, and/or control signals.
    Type: Grant
    Filed: May 23, 2019
    Date of Patent: December 17, 2019
    Assignee: COOLEDGE LIGHTING INC.
    Inventors: Michael A. Tischler, Paul Palfreyman
  • Patent number: 10499467
    Abstract: An LED lamp with constant current dimming drive circuit based on PWM input includes a PWM variable power supply input end, a PWM matching circuit, a voltage rectifying circuit, a DC-DC constant current output circuit and an LED lamp, and the voltage signal of the PWM variable power supply input end is provided by the PWM voltage output power supply, and the PWM variable power supply input end is respectively connected with the PWM matching circuit and the voltage rectifying circuit, and the PWM matching circuit is connected with the enable end of the DC-DC constant current output circuit, and the voltage rectifying circuit is connected to the power supply end of the DC-DC constant current output circuit, and the voltage of the voltage rectifying circuit changes according to the duty ratio of the voltage of the PWM variable power supply input end, and the voltage of the PWM variable power supply input end passes through the voltage dividing resistor of PWM matching circuit and output PWM control signal, and PW
    Type: Grant
    Filed: December 18, 2018
    Date of Patent: December 3, 2019
    Assignee: Self Electronics Co., Ltd.
    Inventor: Qiming Wang
  • Patent number: 10499474
    Abstract: A driver circuit and a driving method with low inrush current are provided. The driving method includes steps of: supplying a charging current smaller than a high inrush current; outputting a pulse signal from a pulse generating circuit; enabling a light driving circuit to receive the charging current by the pulse signal and allowing the charging current to flow to an storage capacitor; turning on a switch component and a light-emitting assembly by the pulse signal; supplying an auxiliary current smaller than the high inrush current; enabling the light driving circuit to receive the auxiliary current and allowing auxiliary current to flow sequentially to the switch component and the light-emitting assembly; and emitting light by the light-emitting assembly with the discharging current of the storage capacitor and the auxiliary current of input power source.
    Type: Grant
    Filed: February 20, 2019
    Date of Patent: December 3, 2019
    Assignee: ANPEC ELECTRONICS CORPORATION
    Inventors: Chih-Ning Chen, Chih-Heng Su, Hung-Wen Lu
  • Patent number: 10483837
    Abstract: The present embodiments are directed to an improved switched capacitor (SC) converter topology that does not include an inductor. In particular, the topology includes a ladder SC circuit configured as a cap divider, with a gate driving signal being generated to initiate the charging and discharging of the capacitor. In this specific topology, an unregulated output voltage is produced that is a certain fraction of an input voltage of a power source such as a battery. The present embodiments further include a variable frequency modulation (VFM) scheme based on the current-sensing techniques for the gate driving signal generation of the switched capacitor converter.
    Type: Grant
    Filed: May 14, 2018
    Date of Patent: November 19, 2019
    Assignee: Renesas Electronics America Inc.
    Inventor: Yen-Mo Chen
  • Patent number: 10476355
    Abstract: The invention relates to a method for controlling a converter connected to an electric machine by a cable (Cx) via a filter (F), said method consisting in determining at least one sequence of a plurality of voltage pulses forming a square wave signal to be applied to each conductor so as to minimize an overvoltage level, said sequence comprising a number 2N of successive pulses, N being greater than or equal to 1, each pulse being defined by a distinct rank n, said sequence being generated such that each increasing voltage pulse of rank n exhibits a pulse width that is identical to that of a decreasing voltage pulse of rank equal to 2N+1?n, and the method includes the following steps in particular: determining the number of successive pulses of said sequence; determining the width of each pulse of the sequence made suitable for minimizing the overvoltage level across the terminals of the electric machine (M).
    Type: Grant
    Filed: February 4, 2019
    Date of Patent: November 12, 2019
    Assignee: Schneider Toshiba Inverter Europe SAS
    Inventors: Hocine Boulharts, Rudolf Fehringer
  • Patent number: 10455659
    Abstract: A load control device for controlling the amount of power delivered to an electrical load is able to operate in a normal mode and a burst mode. The load control device may comprise a control circuit that activates an inverter circuit during active state periods and deactivates the inverter circuit during inactive state periods. The control circuit may operate in the normal mode to regulate an average magnitude of a load current conducted through the electrical load to be above a minimum rated current. The control circuit may operate in the burst mode to adjust the average magnitude of the load current to be below the minimum rated current. The control circuit may adjust the average magnitude of the load current by adjusting the length of the inactive state periods while holding the length of the active state periods constant.
    Type: Grant
    Filed: December 13, 2018
    Date of Patent: October 22, 2019
    Assignee: Lutron Technology Company LLC
    Inventor: Stuart W. DeJonge
  • Patent number: 10438789
    Abstract: A light source is composed of a discharge lamp, a resistor and a reflector container. The discharge lamp is provided as a source of light. The resistor increases a resistance in elevation of a temperature thereof, and reduces the resistance in lowering of the temperature thereof. The reflector container is a constituent element to which the discharge lamp and the resistor are attached. Additionally, the resistor is caused to heat an outer surface of the reflector container in accordance with elevation of a temperature of the discharge lamp in activation of lighting of the discharge lamp.
    Type: Grant
    Filed: August 23, 2018
    Date of Patent: October 8, 2019
    Assignee: PHOENIX ELECTRIC CO., LTD.
    Inventors: Tomihiko Ikeda, Kouichi Odani
  • Patent number: 10433378
    Abstract: A controller circuit is configured to drive a switching element to establish a channel that electrically couples a source to an inductive element of a buck converter and generate a minimum current sample. In response to current at the switching element exceeding a target peak current threshold of a set of control parameters for the buck converter, the controller circuit is configured to generate a peak current sample, calculate a mean current using the minimum current sample and the peak current sample, and modify the set of control parameters using the mean current. In response to the switching element satisfying an off time of the set of control parameters, the controller circuit is configured to drive the switching element to establish the channel that electrically couples the source to the inductive element during an on state for a subsequent switching period.
    Type: Grant
    Filed: January 15, 2019
    Date of Patent: October 1, 2019
    Assignee: Infineon Technologies AG
    Inventors: Paolo Del Croce, Albino Pidutti, Andrea Baschirotto, Osvaldo Gasparri
  • Patent number: 10412805
    Abstract: A lighting apparatus is provided including a lighting unit arranged to emit light; a switching device disposed between a power source and the lighting unit; and a controller configured to set a drive signal based on a target luminance level of the lighting unit and control a switching operation of the switching device via a drive signal to regulate a supply of electric power from the power source to the lighting unit. The controller monitors a voltage of the power source and periodically adjusts the drive signal based on the voltage of the power source.
    Type: Grant
    Filed: May 16, 2018
    Date of Patent: September 10, 2019
    Assignee: Black & Decker Inc.
    Inventors: Daniel L. Schwarz, Michael J. Schaub, Crystal G. Young
  • Patent number: 10375793
    Abstract: Systems and methods are provided to transmit a data encoded power signal to addressable devices. A data signal includes address and command data that varies between logical states. A controller provides a low loss rectified power signal. The controller further provides data within the power signal by forming a positive polarity rectified power waveform corresponding to data in a first state and a negative polarity rectified waveform signal corresponding to data in a second state using substantially loss-less circuitry.
    Type: Grant
    Filed: October 26, 2018
    Date of Patent: August 6, 2019
    Assignee: Hunter Industries, Inc.
    Inventor: Peter John Woytowitz
  • Patent number: 10361752
    Abstract: The present invention relates to a Voltage converter (100) for converting an input voltage (V10) to an output voltage (V20) comprising an input circuitry (102) for receiving the input voltage (V10) from a power supply (112), wherein the input circuitry includes chopper means (110) for chopping a voltage (V12) derived from the input voltage (V10) at a chopper frequency to a chopped voltage (V14), an inductive transformer unit (106) for transforming the chopped voltage (V14) to a chopped AC voltage (V16), and an output circuitry (104) for converting the chopped AC voltage (V16) of the inductive transformer unit (106) to the output voltage (V20) having a lower frequency than the chopper frequency.
    Type: Grant
    Filed: August 7, 2012
    Date of Patent: July 23, 2019
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Gerardus Lucien Mathildus Jansen, Funda Sahin Nomaler, Can Nemlioglu, Ronald Hans Van Der Voort
  • Patent number: 10332450
    Abstract: An electro-optical device includes a first data transfer line that intersects a scan line, a second data transfer line, a first transistor that controls coupling between the first data transfer line and the second transfer line. The two or more second data transfer lines are respectively coupled to the first data transfer line via first capacitors, and when a collection of pixel circuits that are coupled to the same first data transfer line via the second data transfer lines is referred to as a pixel string, the second data transfer lines are provided to pixel circuits less than the pixel circuits included in the pixel string.
    Type: Grant
    Filed: August 20, 2018
    Date of Patent: June 25, 2019
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Hitoshi Ota, Takeshi Koshihara
  • Patent number: 10314135
    Abstract: The present invention relates to an LED retrofit lamp (1) for being connected to a high frequency electronic ballast (26), the high frequency electronic ballast (26) being adapted for providing a voltage and a current to the LED retrofit lamp (1). The LED retrofit lamp (1) comprises an LED unit (4), an adapting unit (30) for adapting the voltage and the current provided by the high frequency electronic ballast (26) to a voltage and a current for operating the LED unit (4), a detecting unit (40) for detecting an electrical value that depends on the current provided by the high frequency electronic ballast (26), and a ballast protection unit (60) for performing, in dependence of the detected electrical value, an operation for protecting the high frequency electronic ballast (26) from an overcurrent situation. This allows avoiding an unsafe situation, such as when the high frequency electronic ballast (26) is overheated.
    Type: Grant
    Filed: August 27, 2014
    Date of Patent: June 4, 2019
    Assignee: SIGNIFY HOLDING B.V.
    Inventors: Borong Su, Bernhard Christiaan van Dijk, William Peter Mechtildis Marie Jans, Haimin Tao
  • Patent number: 10306716
    Abstract: A control signal switching system generates a light emitting module control signal for controlling a light emitting module, and the control signal switching system has a switching module and a transmission module. The switching module receives a switching control signal, a first control signal and a second control signal and output one control signal selected from the first control signal and the second control signal according to the switching control signal. The transmission module is connected to the switching module for receiving the one control signal selected from the first control signal and the second control signal and generates the light emitting module control signal for transmitting to the light emitting module. Therefore, the light emitting module is in operation according to the light emitting module control signal.
    Type: Grant
    Filed: August 14, 2018
    Date of Patent: May 28, 2019
    Assignee: THERMALTAKE TECHNOLOGY CO., LTD.
    Inventor: Pei-Hsi Lin
  • Patent number: 10285230
    Abstract: Driver for an LED lamp, including an LED driver for driving an LED, a voltage input port adapted to connect the driver to a multi switch as a power source, a voltage output port connecting the LED to the LED driver, and a bleeder circuit suppressing leakage current provided by the multi switch, wherein the bleeder circuit is connected in series between the voltage input port and the LED driver.
    Type: Grant
    Filed: September 12, 2018
    Date of Patent: May 7, 2019
    Assignee: LEDVANCE GMBH
    Inventors: Yang Liu, Kun Xiong
  • Patent number: 10285231
    Abstract: The invention relates to a switching regulator for operating luminaires, comprising a control circuit (4). The control circuit (4) is designed to operate, by triggering the switch (5) that is coupled to a coil, the switching regulator (3) in a limit mode of operation when the load generated by the luminaire (2) is so high that the resulting switching-off threshold exceeds a predefined minimum switching-off value, and operate the switching regulator in a discontinuous mode of operation at the minimum switching-off value when the load generated by the luminaire (2) is so low that the switching-off threshold in a limit mode of operation would lie below the predefined minimum switching-off value. The signal representing the current is fed to the control circuit (4) in both the limit mode of operation and the discontinuous mode of operation without being subjected to any external mean value generation.
    Type: Grant
    Filed: February 4, 2016
    Date of Patent: May 7, 2019
    Assignee: TRICONIC GMBH & CO KG
    Inventors: John Schönberger, Thomas Dumka, Andre Mitterbacher, Lukas Saccavini
  • Patent number: 10278244
    Abstract: A multifunctional universal driver (210) for an electric load (228) is disclosed. The driver (210) comprises a switching driver circuit (220) operatively connected to said load (228), a programmable integrated circuit (298) operatively connected to said switching driver circuit (220) to generate a control signal for control of said load (228), a user control means (234) operatively connected to said programmable integrated circuit (298) for user control of said control signal, said user control means (234) comprising a wireless receiver (200); a wireless remote controller platform (204) comprising a remote user control (434) for wirelessly transmitting control instructions to said wireless receiver (200) wherein said wireless receiver (200) is a transceiver and said driver (210) comprises means for transmitting the power consumption of said load (228), its status, or other information to said remote controller platform (204) in response to a query received from said remote controller platform (204).
    Type: Grant
    Filed: June 5, 2017
    Date of Patent: April 30, 2019
    Inventor: Farhad Bahrehmand
  • Patent number: RE47402
    Abstract: Disclosed is an LED lamp system designed to fit into a fluorescent lamp fixture and to utilize a fluorescent lamp power supply contained in the fixture and receiving power from AC mains. The LED lamp system includes an LED driver which comprises a power factor corrected driver circuit for achieving a power factor of at least about 0.8. The LED driver further comprises a current control circuit, responsive to the presence of a three-wire magnetic ballast in the fluorescent lamp power supply, for increasing the LED operating current above the nominal rated LED operating current and to a level sufficient to achieve power factor of the LED driver of at least about 0.8.
    Type: Grant
    Filed: November 30, 2017
    Date of Patent: May 21, 2019
    Assignee: ENERGY FOCUS, INC.
    Inventors: Laszlo A. Takacs, Roger F. Buelow, Tomislav Kralj
  • Patent number: RE48368
    Abstract: Provided is a smart matching step-down circuit, comprising an alternating current input terminal (10), a rectifier filter circuit (20), a switching circuit (30), a high voltage BUCK control step-down circuit (40), a floating zero potential control circuit (41), a voltage detection and feedback circuit (50), a PWM controller (52), a full-bridge DC/AC converter circuit (60), an alternating current output terminal (70), an output voltage detection circuit (62), and a conversion controller (80); the high voltage BUCK control step-down circuit comprises a step-down inductor (L1) and a step-down capacitor (C18); the first end of the step-down inductor is connected to the output terminal of the switching circuit; the second end of the step-down inductor is connected to the positive electrode of the step-down filter capacitor, and is used for stepping down and filtering the pulse voltage, then outputting a second current; the floating zero potential control circuit comprises a flyback diode (D11, D12); the cathode of
    Type: Grant
    Filed: May 15, 2019
    Date of Patent: December 22, 2020
    Assignee: Guangdong BESTEK Medical Devices Co., Ltd.
    Inventor: Xinhua Xu