Periodic Switch In The Supply Circuit Patents (Class 315/186)
  • Patent number: 10375795
    Abstract: An auxiliary power system for powering an auxiliary circuit is connected to the same power source that powers the lighting element within a luminaire. The auxiliary power system may be connected to the output of the power source in series or in parallel with the lighting element. The power source may be an LED driver and the lighting element may include one or more LEDs or the power source may be an electronic ballast and the lighting element may be one or more fluorescent lamps.
    Type: Grant
    Filed: May 25, 2017
    Date of Patent: August 6, 2019
    Assignee: ABL IP Holding LLC
    Inventors: Yelena N. Davis, Yaser S. Abdelsamed, Candace Wilson
  • Patent number: 10326356
    Abstract: A boost power factor correction circuit, a driving circuit for light-emitting diodes and a lighting device are provided. The boost power factor correction circuit includes: a PFC controller; a PFC switch controlled by an output of the PFC controller; and an equivalent variable resistor connected between the PFC switch and the ground. A feedback current input of the PFC controller is connected to a node between the PFC switch and the equivalent variable resistor. The resistance of the equivalent variable resistor is controlled by the output voltage of the PFC circuit. In case that the PFC circuit operates under an mains AC or CCG input, the resistance keeps constantly minimum, and in case that the PFC circuit operates under an ECG input, the resistance increases as the output voltage of the PFC circuit decreases.
    Type: Grant
    Filed: April 30, 2015
    Date of Patent: June 18, 2019
    Assignee: LEDVANCE GMBH
    Inventors: Junnan He, Shaoping Chen
  • Patent number: 10321529
    Abstract: An alternating current sequential drive type LED lighting device having improved flicker performance and being capable of reducing the light output deviation of the LED lighting device generated during operation intervals by removing nonluminous intervals of the LED lighting device by means of a loop-back compensation unit.
    Type: Grant
    Filed: March 30, 2017
    Date of Patent: June 11, 2019
    Assignee: Seoul Semiconductor Co., Ltd.
    Inventors: Young Do Jung, Sung Ho Jin, Sang Wook Han, Hye Man Jung
  • Patent number: 10264636
    Abstract: A light source and a light emitting module thereof are provided. The light source drives and controls the light emitting module containing numerous light emitters by linear constant current drivers and a switch, and all the light emitters can be turned on or turned off simultaneously by utilizing a manner of full-balance series-parallel conversion, which result in the superior light uniformity and even the low flicker requirement can be met.
    Type: Grant
    Filed: August 2, 2018
    Date of Patent: April 16, 2019
    Assignee: KAISTAR LIGHTING (XIAMEN) CO., LTD.
    Inventor: Jinfu Wen
  • Patent number: 10264648
    Abstract: Examples of the present disclosure are related to systems and methods for a paralleled hybrid horticulture system. More particularly, embodiments disclose utilizing a constant power (CP) power supply that is configured to operate in both constant voltage and constant current modes, wherein the maximum current and maximum voltage conditions may be programed.
    Type: Grant
    Filed: August 31, 2017
    Date of Patent: April 16, 2019
    Assignee: Fluence Bioengineering, Inc.
    Inventors: Dung Duong, Randy Johnson
  • Patent number: 10251228
    Abstract: An add-on electronic load that, when inserted in parallel with a LED fixture, which is controlled by a triac-based dimmer, will improve dimming performance by reducing flickering and/or achieving a lower stable dim level, while dissipating an amount of power that can be safely dissipated if said add-on load in installed in a single-gang wall box behind installed said dimmer.
    Type: Grant
    Filed: May 7, 2017
    Date of Patent: April 2, 2019
    Inventor: Marshall Lester
  • Patent number: 10219332
    Abstract: A power supply includes an AC input power connector; an AC-DC converter circuit coupled to the AC input power connector; a constant-current constant-voltage control unit configured to receive DC power from the AC-DC converter circuit; a light emitting diode (LED) lamp unit configured to receive power from the constant-current constant-voltage control unit; and a capacitor coupled in parallel with the LED lamp unit.
    Type: Grant
    Filed: January 10, 2018
    Date of Patent: February 26, 2019
    Assignee: GARDENIA INDUSTRIAL LIMITED
    Inventor: Shu Rong Ouyang
  • Patent number: 10212786
    Abstract: According to one embodiment, a vehicle lighting device includes a first circuit portion that has at least one light emitting element and a first resistor connected in series to the light emitting element; a second circuit portion that is connected in parallel to the first circuit portion and has at least a control portion; and a third circuit portion that is connected in series to the first circuit portion and the second circuit portion, and has at least one light emitting element. The control portion measures an input voltage and causes a current to flow through the third circuit portion in a case where the measured input voltage is a predetermined value.
    Type: Grant
    Filed: October 23, 2017
    Date of Patent: February 19, 2019
    Assignee: Toshiba Lighting & Technology Corporation
    Inventors: Daisuke Kosugi, Atsushi Heike
  • Patent number: 10149360
    Abstract: A lighting control system includes: a first control device; a detector; a second control device; and a lighting device. The first control device transmits a PWM signal to the second control device. The second control device receives the PWM signal and acquires a detection signal indicating a detection result of the detector, and transmits to the lighting device a dimming signal corresponding to either one of the PWM signal or the detection signal. The PWM signal includes either one of a dimming PWM signal whose duty ratio is within a predetermined range or a detection control PWM signal whose duty ratio is outside the predetermined range. When the dimming PWM signal is received, the second control device performs dimming control on the lighting device, and when the detection control PWM signal is received, the second control device performs lighting control on the lighting device according to the detection signal.
    Type: Grant
    Filed: December 21, 2017
    Date of Patent: December 4, 2018
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventor: Yuichirou Hirowatari
  • Patent number: 10104734
    Abstract: Provided is a lighting system including a dimming control device that is arranged apart from a lighting device and outputs a DC voltage of a voltage value corresponding to a dimming degree indicating a turn-on state of a light source of the lighting device, in which the DC voltage is for controlling to turn on the light source in the lighting device, a wiring that transmits the DC voltage output by the dimming control device to the lighting device, and the lighting device that performs absorption control of absorbing a drop in the voltage value due to transmission of the DC voltage by the wiring.
    Type: Grant
    Filed: September 8, 2017
    Date of Patent: October 16, 2018
    Assignee: Toshiba Lighting & Technology Corporation
    Inventors: Kazuaki Itami, Hirokazu Otake
  • Patent number: 10057965
    Abstract: A driver for a lighting device includes a light emitting diode (LED) driver circuit utilizing interface elements for supporting multiple control connectivity options, the LED driver circuit utilizing a processor having a physical layer interfaces coupled to the interface elements and configured to operatively support a plurality of network protocols, the processor being configured to perform a plurality of functions, including a function of providing a bridge or gateway between network protocols of the plurality of network protocols, the processor being configured to: detect available network protocols of the plurality of network protocols; select, for a physical layer interface, a mode of operation (from modes of operation including, for example: an inactive mode, a monitoring mode, a gateway mode, and a primary mode) appropriate to ensure interoperability and backward compatibility for the available network protocols; and assign one or more of the available network protocols to the physical layer interface(
    Type: Grant
    Filed: May 4, 2016
    Date of Patent: August 21, 2018
    Assignee: Fulham Company Limited
    Inventors: Mark Rumer, Chunyan Han, Xu Wang, Duoping Wang, Colin Whittaker, Brad Hubbard, Zhonghua Shi
  • Patent number: 10051695
    Abstract: A lamp control device includes a converter configured to provide an output voltage and an internal voltage; a lamp including an LED module which has a plurality of LED channels, and configured to emit light in correspondence to the output voltage of the converter; and a controller configured to operate by using the internal voltage of the converter, control the output voltage of the converter to be retained at a level equal to or higher than a predetermined level, by using feedback voltages of the plurality of LED channels, and control channel currents of the plurality of LED channels to be regulated in correspondence to memory values which are set in advance.
    Type: Grant
    Filed: December 30, 2015
    Date of Patent: August 14, 2018
    Assignee: SILICON WORKS CO., LTD.
    Inventors: Sung Hwan Kim, Joo Wan Ha, Sun Geon Yoo, Hai Feng Jin, Ju Hyun Lee, Wanyuan Qu, Se Won Lee, Byeong Ho Jeong, Ju Pyo Hong
  • Patent number: 10015857
    Abstract: A light emitting apparatus including: a light emitting array having at least one light emitting string of serial connected light emitting elements, wherein a bypass switch is connected in parallel to each light emitting element of said light emitting string; and a driving control unit controlling a shift timing of the bypass switches to reduce a variation of a voltage drop across the light emitting string.
    Type: Grant
    Filed: May 11, 2017
    Date of Patent: July 3, 2018
    Assignee: ROHM CO., LTD.
    Inventor: Paulo Lookman
  • Patent number: 9973083
    Abstract: A predictive controller for an inductive DC-DC converter comprising a switchable inductor is described. The predictive controller includes a DC-DC controller configured to generate a plurality of switching phases to control the inductor current in the switchable inductor, the duration of the switching phases being determined from at least one of a reference inductor current value and a reference output voltage value. The predictive controller includes a supervisory controller coupled to the DC-DC controller and configured to set a reference inductor current value dependent on an expected change in load current and/or voltage of a load configured to be connected to the load terminal. The expected change in load current and/or voltage is determined from a predetermined load profile.
    Type: Grant
    Filed: October 4, 2017
    Date of Patent: May 15, 2018
    Assignee: NXP B.V.
    Inventors: Matthias Rose, Hendrik Johannes Bergveld, Olivier Trescases, David King Wai Li
  • Patent number: 9974127
    Abstract: A lighting device includes a rectifier circuit, a drive circuit and a current control circuit. Rectifier circuit rectifies an AC voltage into a pulsating voltage to be output. A load circuit including two or more solid light sources connected in series is connected between output terminals of rectifier circuit. The drive circuit changes a number of solid light sources emitting light, according to a change in a voltage value of the pulsating voltage, so that a period of the pulsating voltage includes: a first time period during which a part of the two or more solid light sources emits light; and a second time period during which all of the two or more solid light sources emit light. The current control circuit controls, in at least the second time period, a value of current flowing through load circuit according to an average voltage of the pulsating voltage.
    Type: Grant
    Filed: February 7, 2017
    Date of Patent: May 15, 2018
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventor: Shigeru Ido
  • Patent number: 9942955
    Abstract: Disclosed is an LED lamp using a switching circuit, configured to prevent occurrence of electric shock caused by a contact of a conductive metal or the human body by arranging the switching circuit between a first rectifier circuit and an LED circuit. The disclosed LED lamp using a switching circuit connects the switching circuit to at least one line among a plurality of lines connecting a rectifier circuit and an LED circuit, wherein the switching circuit may comprise: a switching element comprising at least one from among an SCR, a TRIAC, a TR, and an FET; and a driving element comprising at least one from among a capacitor, a TVS, a ZENER, a SIDAC, a resistance, and an inductor.
    Type: Grant
    Filed: April 10, 2015
    Date of Patent: April 10, 2018
    Assignee: AMOSENSE CO., LTD. (CHEONAN THE FOURTH LOCAL INDUSTRIAL COMPLEX)
    Inventors: Won-San Na, Jin-Pyo Park, Bo-Hyeon Han, Cheol-Seung Han
  • Patent number: 9924576
    Abstract: Light-emitting diodes (LEDs) generate light more efficiently than high-intensity discharge lamps or high-intensity fluorescent lamps. Driving a series of LEDs with a constant-voltage primary supply and a low-voltage LED driver keeps efficiency high. Unfortunately, LED forward voltage varies as a function of temperature: at low temperature, the forward voltage rises. Placing the LEDs in series magnifies the forward voltage increases. This makes it difficult to drive a series of LEDs at low temperature with a constant-voltage supply because the forward voltage can exceed the power supply voltage. To account for this behavior, an exemplary LED lighting fixture includes a “bypass” circuit that, when engaged, effectively removes at least one LED from each series string of LEDs to bring the total forward voltage below the power supply voltage. The low-voltage driver circuit monitors temperature, and engages the “bypass” circuit when necessary to ensure that DC voltage is not exceeded.
    Type: Grant
    Filed: October 29, 2015
    Date of Patent: March 20, 2018
    Assignee: Digital Lumens, Inc.
    Inventors: Scott D. Johnston, Christopher Elledge, Hugh Medal, Frederick M. Morgan, John F. Egan
  • Patent number: 9924569
    Abstract: An LED driving circuit for driving an LED load including N LED strings, where N is a positive integer no less than 2, can include: (i) a power converter having a power switch; (ii) a constant current control circuit that controls a switching operation of the power switch such that the power converter generates a driving current for the LED load; (iii) N control switches respectively coupled in series to the N LED strings; (iv) a PWM signal generator configured to generate N color tuning PWM signals; and (v) a color tuning control circuit configured to output N switching control signals according to the N color tuning PWM signals, to control switching operations of the N control switches, to regulate a ratio of a current through each LED string of the LED load to the driving current, and to regulate the color temperature of the LED load.
    Type: Grant
    Filed: June 27, 2016
    Date of Patent: March 20, 2018
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Jianxin Wang, Hongbin Lai, Wei Chen
  • Patent number: 9924568
    Abstract: An apparatus is disclosed in some embodiments. The apparatus comprising; a diode light source having a first terminal and a second terminal, an input configured to receive power form an output of a power supply, an inductor configured to store energy and to provide power for the diode light source, the inductor having a first terminal connected to the first terminal of the diode light source, and a second terminal connected to the second terminal of the diode light source, wherein the diode light source and the inductor are connected in parallel, a switching element configured to control a flow of a current through the inductor.
    Type: Grant
    Filed: February 1, 2016
    Date of Patent: March 20, 2018
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Kai Jämsä, Pekka Hyppönen, Samuli Wallius
  • Patent number: 9913336
    Abstract: A light emitting diode (LED) tube lamp includes: a lamp tube, for receiving an external driving signal, a rectifying circuit, a filtering circuit, and an LED module coupled to the filtering circuit and configured to receive a filtered signal for emitting light, wherein the LED module comprises an LED unit, a current-limiting element for receiving the external driving signal, the current-limiting element coupled to one or more of the external connection terminals, and coupled to or in the rectifying circuit, and a ballast interface circuit coupled to the current-limiting element and having a first terminal and a second terminal, for the LED tube lamp to be compatible with a ballast providing the external driving signal, wherein the ballast interface circuit comprises a detection circuit and a switching circuit coupled to the detection circuit, and the ballast interface circuit is configured to detect whether the external driving signal comes from a ballast, and to conduct or cut off the switching circuit based
    Type: Grant
    Filed: March 9, 2017
    Date of Patent: March 6, 2018
    Assignee: Jiaxing Super Lighting Electric Appliance Co., Ltd.
    Inventors: Aiming Xiong, Xintong Liu, Yueqiang Zhang, Caihua Wang
  • Patent number: 9900937
    Abstract: A power supply including: an AC input power connector; an AC-DC converter circuit coupled to the AC input power connector; a constant-current constant-voltage control unit configured to receive DC power from the AC-DC converter circuit; a light emitting diode (LED) lamp unit configured to receive power from the constant-current constant-voltage control unit; and a capacitor coupled in parallel with the LED lamp unit.
    Type: Grant
    Filed: August 26, 2016
    Date of Patent: February 20, 2018
    Assignee: Gardenia Industrial Limited
    Inventor: Shu Rong Ouyang
  • Patent number: 9894732
    Abstract: An LED tube lamp is provided. The LED tube lamp includes a lamp tube having at least two external connection terminals, for receiving an external driving signal; a rectifying circuit for rectifying the external driving signal to produce a rectified signal; an LED lighting module comprising an LED module, for emitting light; and a ballast interface circuit coupled between the external connection terminals and the LED lighting module, and comprising a detection circuit configured to determine whether the external driving signal is a high frequency or high voltage signal according to the frequency or voltage level of the rectified signal, wherein the ballast interface circuit is configured such that when the external driving signal is determined to be a high frequency or high voltage signal, the ballast interface circuit causes current conduction in the LED module for emitting light.
    Type: Grant
    Filed: December 19, 2016
    Date of Patent: February 13, 2018
    Assignee: Jiaxing Super Lighting Electric Appliance Co., Ltd.
    Inventors: Aiming Xiong, Xintong Liu, Xiaojia Wu, Hechen Hu
  • Patent number: 9867239
    Abstract: An LED tube lamp includes a lamp tube having a first pin and a second pin for receiving an external driving signal; a first rectifying circuit for rectifying the external driving signal to produce a rectified signal; a filtering circuit for filtering the rectified signal to produce a filtered signal; an LED lighting module configured to receive the filtered signal for emitting light; and a ballast detection circuit coupled to the first pin or the second pin, and coupled to the first rectifying circuit. The ballast detection circuit includes a switching circuit, and is for detecting whether the external driving signal comes from a ballast. And the ballast detection circuit is configured to control, based on a result of the detection, current conduction or cutoff of the switching circuit, to determine whether to conduct current by the switching circuit, which current bypasses a circuit path other than the switching circuit.
    Type: Grant
    Filed: March 31, 2016
    Date of Patent: January 9, 2018
    Assignee: Jiaxing Super Lighting Electric Appliance Co., Ltd.
    Inventors: Aiming Xiong, Hechen Hu, Qifeng Ye
  • Patent number: 9854634
    Abstract: A solid state lighting switch can include a first input control that can be configured to adjust a dimming indication or color indication for a solid state lighting fixture that is configured for coupling to the solid state lighting switch. A selective linking mechanism can be configured to activate a linked mode of operation of the switch to link the dimming indication to the color indication or to activate an unlinked mode of operation of the switch to unlink the dimming indication from the color indication.
    Type: Grant
    Filed: December 30, 2016
    Date of Patent: December 26, 2017
    Assignee: Cree, Inc.
    Inventor: Joseph Paul Chobot
  • Patent number: 9844115
    Abstract: Embodiments of the present invention are related to a lighting system comprising a control unit that manages a lighting device with an LED board within an optical chamber. The LED board includes a first string of LEDs and a second string of LEDs. The control unit and the LED board are configured to electrically couple to first and second wires. The first string of LEDs and the second string of LEDs are configured to emit light having different spectral power distributions within the visible spectrum. The first string of LEDs is oriented in an electrically opposite direction than the second string of LEDs. The control unit comprises a switch configured to direct current between the first wire and second wire. The wire to which current is directed is designated active. The designated active wire activates one of the first string of LEDs and second string of LEDs.
    Type: Grant
    Filed: July 14, 2016
    Date of Patent: December 12, 2017
    Assignee: Lighting Science Group Corporation
    Inventors: John Beck, Julia Irvin, Mark Boomgaarden
  • Patent number: 9832825
    Abstract: The signal transmitting device includes: a transmitter-side input for receiving a first DC voltage; a transmitter-side output for outputting a second DC voltage; and a voltage conversion circuit configured to convert the first DC voltage into the second DC voltage. Further, the signal transmitting device includes a control circuit configured to control the voltage conversion circuit so that the second DC voltage has a voltage value (selected from a first voltage value and a second voltage value) which changes according to transmission data in a predetermined transmission period.
    Type: Grant
    Filed: December 8, 2016
    Date of Patent: November 28, 2017
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Masashi Motomura, Hirofumi Konishi, Kenichi Fukuda
  • Patent number: 9820354
    Abstract: A light emitting device is provided. The light emitting device may include a plurality of light emitting array modules each including at least one light emitting element, and a common driving module commonly connected to the plurality of light emitting array modules and configured to supply an operating voltage to each of the connected light emitting array modules. Each of the plurality of light emitting array modules may include a light emitting module including the at least one light emitting element and an individual driving module configured to receive the operating voltage supplied from the common driving module and output an operating current to the light emitting module based on the received operating voltage.
    Type: Grant
    Filed: August 17, 2016
    Date of Patent: November 14, 2017
    Assignee: LG INNOTEK CO., LTD.
    Inventors: Bong Woo Kang, Jun Ho Park
  • Patent number: 9807854
    Abstract: An illumination device includes a signal reception unit capable of receiving an audio signal from outside, a musical piece extraction unit capable of extracting continuous consonant sounds in the audio signal as a musical piece, a performance state detection unit capable of detecting start/end of performance of the musical piece according to a result of extraction by the musical piece extraction unit, a first illumination lamp capable of radiating ultraviolet rays, a second illumination lamp capable of radiating white light, and an illumination control unit capable of controlling on/off of the first illumination lamp, and of controlling on/off and illuminance of the second illumination lamp, The first and the second illumination lamps are turned on in response to detection of the start of performance, and the first and the second illumination lamps are turned off in response to detection of the end of performance.
    Type: Grant
    Filed: December 24, 2014
    Date of Patent: October 31, 2017
    Assignee: AG INC.
    Inventor: Kazuo Nakano
  • Patent number: 9755532
    Abstract: An isolated fly-buck converter provided for converting an input voltage (Vin) to an output voltage (VS) comprises (i) on a primary side, a primary winding (X1) and a non-isolated buck (CP) connected in series, and a pair of switches (Q1, Q2), wherein the switches are switchable between a forward phase, in which the primary winding and the non-isolated buck are connected to the input voltage, and a fly-buck phase, in which the primary winding and the non-isolated buck are disconnected from the input voltage and are connected to one another in a closed circuit; and (ii) on a secondary side, a secondary winding (X2) coupled to the primary winding, and a first capacitive element (CS) connected over the secondary winding and a first rectifying element (D1) connected to the secondary winding to prevent current from being flown through the secondary winding during the forward phase, wherein the output voltage is achieved as the voltage over the first capacitive element.
    Type: Grant
    Filed: March 11, 2014
    Date of Patent: September 5, 2017
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Magnus Karlsson, Oscar Persson
  • Patent number: 9743500
    Abstract: A multi-view architectural lighting (MVAL) system includes one or more multi-view lighting units (“MV lights”) in which the apparent brightness and color of each MV light is individually and simultaneously controllable for different viewing angles. The MV lights can be pointed in arbitrary directions and installed in arbitrary locations in 3D space with respect to one another, consistent with the structure of a building, etc. This enables a lighting designer to create differentiated lighting experiences for different viewers based on their viewing angle with respect to the MV lights. A calibration system maps viewing locations to emitted light directions for each MV light. Using this information, the appearance of each MV light from a given viewing location relative to that MV light is set by adjusting the light (e.g., typically color and intensity, etc.) emitted in the corresponding direction/directions.
    Type: Grant
    Filed: June 13, 2016
    Date of Patent: August 22, 2017
    Assignee: MISAPPLIED SCIENCES, INC.
    Inventors: Paul Henry Dietz, Albert Han Ng, David Steven Thompson
  • Patent number: 9717122
    Abstract: The present disclosure provides a dimming circuit for SCR dimmer (silicon-controlled rectifier) circuit. The dimming circuit includes a signal conversion circuit for converting an input signal to a sine-wave voltage signal and output the sine-wave voltage signal to a current sampling end of a power factor correction circuit. The dimming circuit also includes the power factor correction circuit to receive the sine-wave voltage signal for correcting power factor. A biasing current is generated according to the input signal and is positively correlated to the input signal, and a sine-wave current signal corresponding to the sine-wave voltage signal is a sum of the biasing current and a primary current of a transformer in the power factor correction circuit.
    Type: Grant
    Filed: December 29, 2015
    Date of Patent: July 25, 2017
    Assignee: SENGLED OPTOELECTRONICS CO., LTD
    Inventors: Zhibin Tian, Junshan Lou, Chaoqun Sun, Jinxiang Shen
  • Patent number: 9678116
    Abstract: A TRIAC low voltage dimming control system for effectively controlling the dimming of low voltage lighting using a TRIAC dimmer. The TRIAC low voltage dimming control system generally includes a TRIAC analyzer that applies a test voltage to a TRIAC dimmer and measures the amount of time required for the TRIAC dimmer to conduct electricity. Utilizing the measured time for the TRIAC dimmer to conduct electricity, the TRIAC analyzer is able to calculate an approximate state of the TRIAC dimmer and provide a corresponding level of DC electrical power to a DC load.
    Type: Grant
    Filed: March 14, 2016
    Date of Patent: June 13, 2017
    Assignee: Inspired LED, LLC
    Inventors: Tanner J. Leland, James J. Levante, Randy J. Wright
  • Patent number: 9674916
    Abstract: A lighting control device includes: a power supply circuit and a first controller. The first controller includes a first control circuit, a signal output circuit and a first interface. The first control circuit is configured to allow the signal output circuit to output a light control signal to the power supply circuit. The signal output circuit is configured to output the light control signal for indicating magnitude of the output power to the power supply circuit. The first control circuit is configured to transmit control information to and receive the control information from a second controller through the first interface. When the control information is received from the second controller through the first interface, the first control circuit is configured to allow the signal output circuit to output the light control signal corresponding to the control information to the power supply circuit.
    Type: Grant
    Filed: July 12, 2016
    Date of Patent: June 6, 2017
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGMENT CO., LTD.
    Inventor: Tomomi Hashimoto
  • Patent number: 9655182
    Abstract: The invention relates to an operating circuit for at least one LED, said operating circuit being supplied with DC voltage or with rectified alternating voltage and providing a supply voltage for at least one LED by means of a coil (L1) and a first switch (S1) clocked by a control/regulation unit (SR). When the first switch (S1) is activated energy is temporarily stored in the coil (L1) and when the first switch (S1) is deactivated said energy is discharged via a diode (D1) and via at least one LED. The control/regulation unit (SR) activates the first switch (S1) when a reactivation condition has been met, and the control/regulation unit (SR) deactivates the first switch (S1) when a deactivation condition has been met. Said reactivation condition and/or deactivation condition can be set in accordance with the current dimming level.
    Type: Grant
    Filed: April 30, 2014
    Date of Patent: May 16, 2017
    Assignee: Tridonic GmbH & Co KG
    Inventors: Frank Lochmann, Markus Schertler
  • Patent number: 9655178
    Abstract: An illumination device and method are provided for controlling light emitting diodes (LEDs). The LEDs (specifically, the LED loads) are controlled, e.g., brightness and color of the LED loads, independent of a phase-cut dimmer applied to the AC mains feeding a DC power supply. The power supply is active dependent upon the duration of a conduction angle supplied from the dimmer. The power supply, however, produces drive currents that are independent from the conduction angle by using a two-stage power supply and a relatively slow and fast control loops that are controlled through a microprocessor based control circuit. Parameters stored in the control circuit are drawn by the microprocessor to control the two-stage power supply to produce the drive currents independent and decoupled from the conduction angle yet dependent on the controller parameters.
    Type: Grant
    Filed: February 3, 2016
    Date of Patent: May 16, 2017
    Assignee: Ketra, Inc.
    Inventors: Jason E. Lewis, Ryan Matthew Bocock
  • Patent number: 9645689
    Abstract: A touch substrate and a display device, comprising a plurality of first electrodes for touch control, a plurality of first switching units and a control unit for controlling the first switching units; any two adjacent the first electrodes are connected through one of the first switching units and each of the first electrodes is connected with the control unit. The touch substrate can avoid the problem that charges tend to accumulate on touch driving electrodes and/or touch sensing electrodes during a touch process and cannot be released well in a display phase.
    Type: Grant
    Filed: November 21, 2014
    Date of Patent: May 9, 2017
    Assignees: BOE Technology Group Co., Ltd., Beijing BOE Optoelectronics Technology Co., Ltd.
    Inventors: Dan Zheng, Haibo Zhu, Linlin Lu, Jianmin Duan, Jingxian Jin, Hongyou Gong, Yulei Zhai
  • Patent number: 9603211
    Abstract: An LED driver can include: a rectifier circuit receiving an AC voltage, and providing a DC output voltage; an LED array having N LED units having at least one LED coupled between first and second output terminals of the DC output voltage; (N?1) groups of switches, each having two switches coupled in series between the first and second output terminals, where a common node of the two switches is coupled to a common node between two adjacent LED units, where the operation of the two switches of each group is complementary such that when the switch is on, the LED unit coupled in parallel with the switch is out of operation; and an LED configuration control circuit that controls the on/off states of switches to control operation of the LED units.
    Type: Grant
    Filed: May 6, 2016
    Date of Patent: March 21, 2017
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Feng Yu, Chen Zhao
  • Patent number: 9590509
    Abstract: An exemplary embodiment of the present invention relates to a power supply. A power supply according to an exemplary embodiment of the present invention includes: a filter capacitor coupled to a line to which an input voltage rectified from an AC input passed through a dimmer is supplied; a discharge switch coupled to the filter capacitor through the line; and a main switch receiving the input voltage and controlling power transmission. The power supply performs input voltage control to shape the input voltage with a predetermined pattern and controls a switching operation time of the main switch.
    Type: Grant
    Filed: June 18, 2013
    Date of Patent: March 7, 2017
    Assignee: Fairchild Korea Semiconductor LTD
    Inventors: Hyun-Chul Eom, Young-Jong Kim, In-Ki Park
  • Patent number: 9584032
    Abstract: A multi-output DC-to-DC power converter includes: a transformer having a primary winding and a secondary winding unit; a primary side control circuit used to receive a DC input voltage, and configured to control supply of the DC input voltage to said primary winding, said transformer generating an induced voltage when the DC input voltage is supplied to said primary winding; a rectifier and filter circuit used to receive the induced voltage, and configured to rectify and filter the induced voltage so as to output at least a first DC voltage; and a converting unit used to receive the first DC voltage, and configured to generate at least first and second DC output voltages based at least on the first DC voltage.
    Type: Grant
    Filed: November 17, 2015
    Date of Patent: February 28, 2017
    Assignees: Lite-On Electronics (Guangzhou) Limited, Lite-On Technology Corp.
    Inventors: Po-Hsiang Tseng, Chih-Tai Chen
  • Patent number: 9578705
    Abstract: A lighting assembly to be primarily used in an agricultural setting to illuminate farm animals with different colors of lighting. The assembly has a circuit for emitting light with different colored light emitting diodes that are arranged in networks of LEDs. The second and third networks are arranged in parallel to a first network of LED forming three separate current paths for lighting the LEDs. Each path has controllable impedance element arranged in series with the network of LED in that particular path and is controlled by a dynamic impedance control element that is coupled to the controllable impedance element to direct current through the individual paths of the circuit.
    Type: Grant
    Filed: December 7, 2015
    Date of Patent: February 21, 2017
    Assignee: Once Innovations, Inc.
    Inventor: Zdenko Grajcar
  • Patent number: 9572214
    Abstract: A light emitting diode lamp string driving system includes a plurality of light emitting diode driving apparatuses and a plurality of light emitting diode lamp strings. The light emitting diode lamp string includes a plurality of light emitting diodes. The light emitting diode driving apparatus includes a switch unit, a control unit and a voltage level generating unit. An anode of a last of the light emitting diodes of the light emitting diode lamp string connected to a first of the light emitting diode driving apparatuses is connected to the control unit of a second of the light emitting diode driving apparatuses.
    Type: Grant
    Filed: August 24, 2015
    Date of Patent: February 14, 2017
    Assignee: SEMISILICON TECHNOLOGY CORP.
    Inventor: Wen-Chi Peng
  • Patent number: 9548021
    Abstract: A method of driving a light-source module includes adjusting a frequency of a boosting switching signal based on a dimming signal which controls luminance of a light-emitting diode (“LED”) string of the light-source module, where the LED string comprises a plurality of LEDs connected to each other in series, and controlling a main transistor in response to the boosting switching signal to transfer a driving voltage to the LED string.
    Type: Grant
    Filed: January 16, 2013
    Date of Patent: January 17, 2017
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Seung-Wan Kim, Min-Soo Choi, Gwang-Teak Lee, Tae-Gon Im, Myoung-Soo Kim, Hwan-Woong Lee, Seung-Young Choi
  • Patent number: 9544974
    Abstract: A light emitting module includes a body, first to Mth (wherein, M is an integer of 2 or greater) light emitting devices provided on the body to be spaced apart from each other, and a turn-on controller controlling the first to Mth light emitting devices to turn on. An mth (1?m?M) light emitting device among the first to Mth light emitting devices comprises first to Nth (wherein, N is an integer of 2 or greater) light emitting cells connected to each other in series. An nth (1?n?N) light emitting cell among the first to Nth light emitting cells includes at least one light emitting structure, and the turn-on controller simultaneously turns on or turns off the nth light emitting cells of the first to Mth light emitting devices.
    Type: Grant
    Filed: January 2, 2014
    Date of Patent: January 10, 2017
    Assignee: LG INNOTEK CO., LTD.
    Inventors: Il Yeong Kang, Sang Hoon Lee, Keun Tak Joo, Tae Young Choi
  • Patent number: 9525306
    Abstract: An emergency load control device includes a lighting relay that is coupled to a lighting load based on a relay control signal input. Further, the emergency load control device includes an emergency relay that is coupled to an emergency lighting load based on an emergency relay control signal input. Furthermore, the emergency load control device includes a power controller that is coupled to the lighting relay and the emergency relay. The power controller is configured to output the relay control signal input to the lighting relay and the emergency relay control signal input to the emergency relay to control the operation of the lighting load and the emergency lighting load respectively. In addition, the emergency load control device includes a dimmer control circuit coupled to the lighting load and the emergency lighting load. The dimmer control circuit controls dimming of the lighting load and the emergency lighting load.
    Type: Grant
    Filed: December 11, 2015
    Date of Patent: December 20, 2016
    Assignee: Cooper Technologies Company
    Inventors: Michael Alan Lunn, Jonathon L. Germon, Kishore S. Aligeti
  • Patent number: 9504106
    Abstract: A turn-off transition time period, also referred to as a reverse recovery time period, may be compensated for by a controller of a power stage including a bipolar junction transistor (BJT). The reverse recovery time period may be measured in one switching cycle and a subsequent switching cycle may include compensations based on the measured reverse recovery time period. That is the switching on and off of the BJT may be compensated to obtain a desired average output current to a load. When the reverse recovery time period is known, an error in the peak current obtained due to the reverse recovery time period may be calculated. The calculated error may be used to offset the target peak current for controlling the switching of the BJT to begin a turn-off transition of the BJT earlier in a switching cycle and thus reduce error in peak current at the BJT.
    Type: Grant
    Filed: July 28, 2014
    Date of Patent: November 22, 2016
    Assignee: CIRRUS LOGIC, INC.
    Inventors: John L. Melanson, Thirumalai Rengachari, Siddharth Maru, Ramin Zanbaghi, Firas Azrai, Rahul Singh
  • Patent number: 9496855
    Abstract: A bipolar junction transistor (BJT) may be used in a power stage DC-to-DC converter, such as for LED-based light bulbs. The BJT may be switched on and off from a controller coupled to two terminals of the BJT. Through the two terminals, the control IC may dynamically adjust a reverse recovery time period of the BJT. The reverse recovery time period may be adjusted by changing an amount of base charge that accumulates on the BJT. Additional, the reverse recovery may be controlled through the use of a reverse base current source applied to the BJT after beginning switching off the BJT.
    Type: Grant
    Filed: July 28, 2014
    Date of Patent: November 15, 2016
    Assignee: CIRRUS LOGIC, INC.
    Inventors: Siddharth Maru, John L. Melanson, Rahul Singh, Eric King, Thirumalai Rengachari, Ramin Zanbaghi, Arnab Kumar Dutta
  • Patent number: 9426852
    Abstract: A controller for a lamp assembly is disclosed. The controller comprises: a mains sensing unit arranged to detect a mains voltage supplied to the lamp assembly; a waveform evaluation unit coupled with the mains sensing unit and arranged to generate a light control signal based on the mains voltage waveform; a demodulation unit coupled with the mains sensing unit and arranged to demodulate a data signal modulated on the mains voltage; an arbitration unit coupled with the demodulation unit and arranged to evaluate the results of the waveform evaluation unit and the demodulation unit and to decide an operation mode; and a control unit coupled with the arbitration unit and arranged to generate a drive signal to drive a light source of the lamp assembly based on the determined light control signal or the demodulated data signal depending on the decided operation mode.
    Type: Grant
    Filed: February 20, 2015
    Date of Patent: August 23, 2016
    Assignee: Dialog Semiconductor (UK) Limited
    Inventor: Stefan Zudrell-Koch
  • Patent number: 9370055
    Abstract: A driver device of a plurality of light sources, in particular LEDs, includes a multi-channel current control module (20) which sets a power supply current on a respective output channel connected to at least one light source (12). At least one static configuration register (54) is connected to said current control module in which a static driving configuration corresponding to the value of the power supply current which the multi-channel current control module must set on each output channel when the driver device is in a stand alone operating mode, is pre-loaded as well as at least one dynamic configuration register (56) that acts to load a dynamic driving configuration received from a digital transmission data bus connected to an electronic control unit.
    Type: Grant
    Filed: May 21, 2015
    Date of Patent: June 14, 2016
    Assignee: AUTOMOTIVE LIGHTING ITALIA S.P.A. A SOCIO UNICO
    Inventors: Davide Baccarin, Alberto Guiotto
  • Patent number: 9357597
    Abstract: A switching circuit includes an active element connected in parallel to a second light source block and having an impedance that varies in accordance with a control signal input into a control terminal, and switches the second light source block between a lit condition and an extinguished condition by switching the active element ON and OFF. The switching circuit adjusts the impedance of the active element so that a current flowing to the active element matches a target value set by a switching control circuit. When the active element is to be switched ON, the switching control circuit varies the target value gradually over time, and therefore an excessive load current can be prevented from flowing while the active element shifts from an OFF condition to an ON condition.
    Type: Grant
    Filed: May 29, 2013
    Date of Patent: May 31, 2016
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventor: Toshiaki Nakamura
  • Patent number: 9345079
    Abstract: A lighting unit includes at least two channels of light sources, and a driver for the light sources. The driver includes a DC/DC converter and a control arrangement for controlling the current supplied to at least one of the two channels in response to a control signal produced by the DC/DC converter. Beneficially, a feedback loop controls a switching device in the DC/DC converter to maintain the light level produced by the light sources at a desired level regardless of changes in the supply voltage arid the load.
    Type: Grant
    Filed: December 13, 2013
    Date of Patent: May 17, 2016
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventor: Timothy B. Moss