Combined With Parallel Connected Load Device Patents (Class 315/192)
  • Patent number: 10383188
    Abstract: An outdoor luminaire comprises a housing adapted to be mounted on an outdoor structure, an input disposed in the housing that receives AC power, and at least one rectification element coupled to the input and which produces rectified AC electrical power comprising a plurality of cycles. At least one LED driver circuit is coupled to the at least one rectification element and a plurality of LEDs is coupled to the at least one LED driver circuit. The LEDs are turned on at different points during each of the plurality of cycles and together develop an output level of at least about 2000 lumens.
    Type: Grant
    Filed: October 6, 2017
    Date of Patent: August 13, 2019
    Assignee: IDEAL INDUSTRIES LIGHTING LLC
    Inventors: Andrew Dan Bendtsen, Kurt S. Wilcox, John Sobieski
  • Patent number: 10372401
    Abstract: Provided is a display module including: a cabinet; and a plurality of Light Emitting Diode (LED) panels arranged on the cabinet in an array, each LED panel of the plurality of LED panels having a plurality of LEDs, wherein the cabinet includes a plurality of level regulators configured to regulate level differences amongst the plurality of LED panels, and wherein the plurality of level regulators include first level regulators provided at respective corners of the plurality of LED panels.
    Type: Grant
    Filed: January 27, 2016
    Date of Patent: August 6, 2019
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Chang Won Ryu, Nguyen huu lam Vuong
  • Patent number: 10368409
    Abstract: A light emitting device includes: a first white light source which includes N pieces of first white light emitting diodes and emits a first white light; and a second white light source which includes M pieces of second white light emitting diodes and a first resistance element electrically connected in series to the second white light emitting diodes and having a first resistance value, is electrically connected in parallel to the first white light source, and emits a second white light, the light emitting device emitting a mixed white light of the first white light and the second white light. The drive voltage of the first white light source is higher than a drive voltage of the second white light source, and a color temperature of the mixed white light is higher as a total luminous flux of the mixed white light is higher.
    Type: Grant
    Filed: October 24, 2017
    Date of Patent: July 30, 2019
    Assignee: Toshiba Materials Co., Ltd.
    Inventors: Hiroyasu Kondo, Masahiko Yamakawa, Yasuhiro Shirakawa, Ryoji Tsuda, Atsuji Nakagawa, Toshitaka Fujii, Tomohiko Inoue
  • Patent number: 10368408
    Abstract: A light emitting device includes: a first white light source which includes N pieces of first white light emitting diodes and emits a first white light; and a second white light source which includes M pieces of second white light emitting diodes and a first resistance element electrically connected in series to the second white light emitting diodes and having a first resistance value, is electrically connected in parallel to the first white light source, and emits a second white light, the light emitting device emitting a mixed white light of the first white light and the second white light. The drive voltage of the first white light source is higher than a drive voltage of the second white light source, and a color temperature of the mixed white light is higher as a total luminous flux of the mixed white light is higher.
    Type: Grant
    Filed: September 8, 2016
    Date of Patent: July 30, 2019
    Assignee: Toshiba Materials Co., Ltd.
    Inventors: Hiroyasu Kondo, Masahiko Yamakawa, Yasuhiro Shirakawa, Ryoji Tsuda, Atsuji Nakagawa, Toshitaka Fujii, Tomohiko Inoue
  • Patent number: 10349479
    Abstract: The purposes of the devices described herein are to provide an LED lighting device capable of efficiently and economically emitting light having a selectable color temperature or a warm-on-dim feature when driven with AC power and to provide LED lighting devices which have an improved power factor and a reduced total harmonic distortion when powered with AC power.
    Type: Grant
    Filed: December 5, 2016
    Date of Patent: July 9, 2019
    Assignee: Lynk Labs, Inc.
    Inventors: Michael Miskin, Robert L. Kottritsch
  • Patent number: 10327297
    Abstract: A control circuit for an LED driving circuit having a rectifier and a power transistor for driving an LED load, can include: a control signal regulation circuit configured to control a driving voltage of the power transistor to vary with a rectifier output voltage to control the variation of a current flowing through the power transistor to be consistent with that of the rectifier output voltage to decrease a power loss of the power transistor; and the control signal regulation circuit being configured to control the driving voltage of the power transistor to vary with the rectifier output voltage to control the variation of the current flowing through the power transistor to be opposite to that of the rectifier output voltage to improve a power factor of the LED driving circuit.
    Type: Grant
    Filed: December 1, 2017
    Date of Patent: June 18, 2019
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Jianxin Wang, Huiqiang Chen
  • Patent number: 10299337
    Abstract: Certain aspects involve lighting systems relating to control of light fixture dimming. For instance, a lighting system may include a first light source that outputs a first light color and a second light source that outputs a second light color. The lighting system also includes a switching device that couples and decouples the second light source in parallel with the first light source. The switching device includes a first setting that couples the second light source in parallel with the first light source and enables a variable color dimming operation. The switching device also includes a second setting that decouples the second light source from the first light source and enables a static color dimming operation.
    Type: Grant
    Filed: June 28, 2018
    Date of Patent: May 21, 2019
    Assignee: ABL IP Holding LLC
    Inventors: Feng Chen, Towfiq M. Chowdhury
  • Patent number: 10299324
    Abstract: Provided is a lighting apparatus. The lighting apparatus may include two or more lighting units each including a plurality of LED groups which sequentially emit light in response to changes of a rectified voltage. The two or more lighting units may include one or more LED groups having the same light emitting sequence but having different light emitting points of time. Thus, current harmonic can be reduced, and power efficiency can be improved.
    Type: Grant
    Filed: July 7, 2015
    Date of Patent: May 21, 2019
    Assignee: SILICON WORKS CO., LTD.
    Inventors: Gyeong Sik Mun, Sang Young Lee, Ki Chul An, Yong Geun Kim
  • Patent number: 10278245
    Abstract: A light-emitting device includes a substrate and a plurality of light-emitting elements disposed above the substrate. In the plurality of light-emitting elements, a first light-emitting element and a second light-emitting element different in a rate of decrease in light output along with a temperature increase are included. The plurality of light-emitting elements include: a first serial element group including some light-emitting elements connected in series among the plurality of light-emitting elements; and a second serial element group connected in parallel with the first serial element group and including some light-emitting elements connected in series among the plurality of light-emitting elements. A ratio between a total number of first light-emitting elements and a total number of second light-emitting elements is different between the first serial element group and the second serial element group.
    Type: Grant
    Filed: February 29, 2016
    Date of Patent: April 30, 2019
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Masumi Abe, Yasuharu Ueno, Koji Omura, Kenji Sugiura, Toshifumi Ogata, Atsuyoshi Ishimori, Toshiaki Kurachi
  • Patent number: 10271397
    Abstract: Disclosed is a control circuit of an LED lighting apparatus, capable of reducing total harmonic distortion (THD). The control circuit may include a THD reduction circuit configured to control a driving current on a current path corresponding to light emission of an LED group in response to a change of a rectified voltage.
    Type: Grant
    Filed: January 26, 2016
    Date of Patent: April 23, 2019
    Assignee: SILICON WORKS CO., LTD.
    Inventor: Yong Geun Kim
  • Patent number: 10257899
    Abstract: An automatically reconfiguring light-emitting circuit includes a first and second block of electric lights, a switching mechanism, the switching mechanism having (i) a first state in which the switching mechanism electrically connects the first block of electric lights in parallel with the second block of electric lights and (ii) a second state in which the switching mechanism electrically connects the first block of electric lights in series with the second block of electric lights, a current regulator that generates a current control signal in response to a current in the first group of lights and second group of lights, and a controller electrically connected to the switching mechanism, the controller configured to switch the switching mechanism between the first state and the second state based on the current control signal.
    Type: Grant
    Filed: June 29, 2017
    Date of Patent: April 9, 2019
    Assignee: LiteIdeas, LLC
    Inventor: Paul D Rucker
  • Patent number: 10237935
    Abstract: An emission control device includes: a switching circuit for switching which light-emitting element or light-emitting elements from among a plurality of light-emitting elements is supplied with current; a detection circuit which detects current or voltage supplied from a DC-power supply circuit; and a control circuit which controls the switching circuit to switch which of the light-emitting element or light-emitting elements from among the plurality of light-emitting elements is supplied with the current when a power switch is turned from on to off and back to on within a predefined period and the current or the voltage detected by the detection circuit is less than when the power switch is on.
    Type: Grant
    Filed: May 16, 2017
    Date of Patent: March 19, 2019
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventor: Keisuke Seki
  • Patent number: 10159131
    Abstract: An LED light fixture, in the form of lamps or luminaires, is comprised on a plurality of LED lights producing bright white or warm light and a plurality of color LED lights producing light of a visibly different color. The fixture includes control circuitry for receiving an input voltage signal from a dimmer switch wherein when the dimmer switch reduces the input voltage to the LED light fixture within a top range setting of the dimmer switch, the brightness of the light is maintained while the color Kelvin temperature of the light spectrum is reduced. If the dimmer switch is increased in the top range, the color temperature increases. This is achieved by increasing the frequency of a reduced input voltage signal during a reduction of the dimmer switch in the top range thereof to supply full driver current to the white or warm light LED's while reducing the driver current to the color LED's.
    Type: Grant
    Filed: May 9, 2018
    Date of Patent: December 18, 2018
    Inventor: Adam Chaimberg
  • Patent number: 10139551
    Abstract: An apparatus includes a first display, an indicium, and a second display. The second display can include a light-generating source deposited on a substrate. The second display illuminates the indicium and the second display has a thickness of less than 0.25 millimeters. The apparatus also includes one or more controllers communicatively coupled to the first display and the second display and configured to control states of the first display and the second display.
    Type: Grant
    Filed: November 13, 2015
    Date of Patent: November 27, 2018
    Assignee: Rohinni, LLC
    Inventors: Cody Peterson, Andrew Huska
  • Patent number: 10136485
    Abstract: In accordance with various embodiments, an overall optical characteristic of light emitted by an illumination system having multiple strings of light-emitting elements, as well as an overall intensity of the light emitted by the illumination system, are independently selected via controlling the strings over multiple time intervals.
    Type: Grant
    Filed: March 30, 2017
    Date of Patent: November 20, 2018
    Assignee: COOLEDGE LIGHTING INC.
    Inventors: William P. Coetzee, Paul Jungwirth, Michael A. Tischler
  • Patent number: 10104730
    Abstract: Described is an LED replacement bulb having the same physical shape and appearance as a fluorescent bulb, but having the superior illumination characteristics of LED lights (e.g., the ability to dim, the absence of flicker) and the ability to switch (with or without transition) from a first color to a second color while the LED lighting assembly undergoes a dimming or brightening procedure. Furthermore, because the bulb uses the output of the light fixture (e.g., the output of the ballast of a fluorescent light fixture) as the cue for whether to change colors, no retrofitting of the lighting system is required (as might be the case if more modern, network-addressable light units were required).
    Type: Grant
    Filed: March 7, 2017
    Date of Patent: October 16, 2018
    Assignee: B/E Aerospace, Inc.
    Inventors: Luis Sam, Brendan Upton, Eric Johannessen, Denis Velis
  • Patent number: 10098195
    Abstract: A circuit arrangement for operating at least a first and a second cascade of LEDs is provided including an input having a first and a second input connection for coupling to a rectified AC supply voltage, a voltage equalization series impedance, and at least a higher and a lower LED units which include cascades. The connection of the LED cascade that is not coupled to a first diode is a second node, and the second node of the lowest LED unit is coupled to a voltage equalization series impedance such that the impedance is coupled in series between the second node and the second input connection. In not-the-lowest LED unit, a fourth node is at any rate a node of the circuit arrangement that is at a lower potential, at least during a prescribable period during the circuit arrangement operation, than the second node.
    Type: Grant
    Filed: September 10, 2015
    Date of Patent: October 9, 2018
    Assignee: OSRAM GmbH
    Inventor: Andreas Seider
  • Patent number: 10088133
    Abstract: A mounting substrate includes: a substrate; a first terminal, a fifth terminal, and a sixth terminal which are disposed in a first region; a second terminal disposed in a second region; a third terminal and a seventh terminal which are disposed in a third region; and a fourth terminal disposed in a fourth region. The mounting substrate includes: a first connecting line which electrically connects the fifth terminal and the second terminal; a second connecting line which electrically connects the sixth terminal and the third terminal; and a third connecting line which electrically connects the seventh terminal and the fourth terminal.
    Type: Grant
    Filed: January 19, 2018
    Date of Patent: October 2, 2018
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Masumi Abe, Toshifumi Ogata, Toshiaki Kurachi
  • Patent number: 10076011
    Abstract: A method of adjusting a correlated color temperature (CCT) of a light provided by a lighting fixture includes receiving, by a DALI command converter device, a DALI dim level command indicating a dim level for the light provided by the lighting fixture. The method further includes providing a first output signal to adjust a dim level of a first light emitted by a first light emitting diode (LED) light source to a first dim level. The method also includes providing a second output signal to adjust a dim level of a second light emitted by a second LED light source to a second dim level that is different from the first dim level. The light provided by the lighting fixture is a combination of the first light and the second light. The DALI command converter device generates the first output signal and the second output signal based on the DALI dim level command.
    Type: Grant
    Filed: June 22, 2017
    Date of Patent: September 11, 2018
    Assignee: Cooper Technologies Company
    Inventors: Soroush Amidi, Kyle Joseph Van Bavel
  • Patent number: 10057953
    Abstract: The present application relates to a LED module (10) for being connected to a DC power supply (11), the LED module comprising a multilayer board (2) comprising a metal surface (2a) and a dielectric layer (2b) arranged thereon, at least one LED chip (1) arranged on the metal surface (2a) of the multilayer board, an encapsulation layer (3) arranged above the at least one LED chip (1), and current regulator means (4) arranged on the multilayer board, wherein the current regulator means (4) are designed to convert a DC input provided to the module (10) to a predefined DC output for being provided to the at least one LED chip (1).
    Type: Grant
    Filed: March 18, 2015
    Date of Patent: August 21, 2018
    Assignees: TRIDONIC JENNERSDORF GMBH, TRIDONIC GMBH & CO KG
    Inventors: Florian Wimmer, Steffen Riemer, Istvan Bakk, Eduardo Pereira, John Schonberger
  • Patent number: 10056561
    Abstract: The present invention discloses an novel organic material containing indenotriphenylene derivatives and organic EL device using the indenotriphenylene derivatives as hole blocking layer(HBL), electron transport layer(ETL) and/or phosphorescent host can efficiently lower driving voltage, lower power consumption and increase the efficiency. The present invention further relates to the methods of preparation for the indenotriphenylene derivatives and organic EL device comprising these derivatives.
    Type: Grant
    Filed: December 3, 2015
    Date of Patent: August 21, 2018
    Inventor: Feng-Wen Yen
  • Patent number: 10045419
    Abstract: A color-temperature adjustable light-emitting diode (LED) lighting device and a method for adjusting the color temperature of an LED lighting device are provided. The color-temperature adjustable LED lighting device includes: a power supply module, a micro-control unit (MCU), an adjustable LED driving power supply having a positive output terminal and a negative output terminal, a cool white LED array, a warm white LED array, a first switch circuit, a second switch circuit, a first current detection circuit, and a second current detection circuit. The power supply module is connected to an input terminal of the MCU and an input terminal of the adjustable LED driving power supply.
    Type: Grant
    Filed: December 12, 2016
    Date of Patent: August 7, 2018
    Assignee: SENGLED CO., LTD.
    Inventors: Mingshuai Wang, Zhenfeng Ding, Zhibin Tian, Jinxiang Shen
  • Patent number: 10015855
    Abstract: Various embodiments are described herein that relate to systems and methods for selectively providing current to power LEDs. The techniques introduced here can enable smooth dimming of the LEDs from maximum brightness down to “actual extinction” or “pseudo-extinction.” More specifically, the LEDs can be dimmed to extinction without any significant gaps in the levels of brightness (i.e., a noticeable drop rather than a smooth transition between brightness levels). Various pulse width modulation (PWM) and shunting techniques may be used to control the power provided to each color channel of an LED board. Conventionally, PWM often causes LEDs to produce an undesirable acoustic effect. However, by dithering the PWM signals between multiple predetermined positions once the frequency enters the audible range (e.g., below 25 kHz), the cumulative acoustic effect instead becomes white noise.
    Type: Grant
    Filed: December 19, 2016
    Date of Patent: July 3, 2018
    Assignee: LUMENETIX, INC.
    Inventor: Herman Ferrier
  • Patent number: 10004128
    Abstract: In embodiments of the present invention improved capabilities are described for systems and methods that employ a control component and/or power source integrated in an LED based light source to control and/or power the LED light source wirelessly. In embodiments, the LED based light source may take the form of a standard light bulb that plugs into a standard lighting socket or fixture.
    Type: Grant
    Filed: December 18, 2015
    Date of Patent: June 19, 2018
    Assignee: WIRELESS ENVIRONMENT, LLC
    Inventors: Michael V. Recker, David B. Levine
  • Patent number: 9999104
    Abstract: A lighting device that supplies current to light-emitting units includes: a DC-to-DC converter; a switch unit connected to the light-emitting units; and a control circuit which controls the DC-to-DC converter and the switch unit. The DC-to-DC converter includes: an inductor through which current from the DC-to-DC converter is provided to the light-emitting units; and a first switch element connected in series with the inductor and which switches ON/OFF. The control circuit includes: a zero-crossing detector that detects that current flowing in the inductor is substantially zero due to the first switch element switching OFF, and outputs a zero-current detection signal; and a switch controller that selects one of the light-emitting units and controls the switch unit to cause the current from the DC-to-DC converter to be supplied to the selected light-emitting unit when the first switch element subsequently switches ON, each time the switch controller receives the zero-current detection signal.
    Type: Grant
    Filed: February 18, 2016
    Date of Patent: June 12, 2018
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Masahiro Naruo, Kenichi Fukuda, Shinji Makimura, Akira Nakajo
  • Patent number: 9974131
    Abstract: The present invention provides a light-emitting component for a backlight module, which comprises a first positive input end, a first negative input end and a plurality of branches connected in parallel therebetween, each of the plurality of the branches comprising a plurality of LEDs connected in series, wherein, in the case that the numbers of LEDs in the respective branches are not exactly the same, a voltage divider is connected in series in at least one of the branches so that currents flowing through respective branches are the same. Correspondingly, the present invention further provides a backlight module and a liquid crystal display device. In the present invention, any number of LEDs can be provided in each of the branches in the light-emitting component, which expands the irradiation scope of light, guarantees the safe distance between adjacent LEDs, and further improves product quality.
    Type: Grant
    Filed: September 29, 2014
    Date of Patent: May 15, 2018
    Assignees: BOE TECHNOLOGY GROUP CO., LTD., BEIJING BOE OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Zhihui Zeng, Lingyun Shi
  • Patent number: 9974137
    Abstract: A light emitting device which can adjust color temperature as power is supplied from a single power source comprises an anode electrode land; a cathode electrode land; a first light emitting unit and a second light emitting unit; a low pass filter including a capacitance member which is provided in parallel with the first light emitting unit and the second light emitting unit; and a resistance member which is provided in series with the first light emitting unit and the second light emitting unit. A phosphor which is included in the first light emitting unit and the second light emitting unit includes a red phosphor which is excited by the primary light that is emitted from the LED element and emits light with a peak light emission wavelength into a red region, and a green phosphor which is excited by the primary light that is emitted from the LED element and emits light with a peak light emission wavelength into a green region.
    Type: Grant
    Filed: August 25, 2015
    Date of Patent: May 15, 2018
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Yoshihiro Kawaguchi, Tomokazu Nada, Makoto Matsuda, Hiroaki Onuma, Osamu Jinushi, Toshio Hata
  • Patent number: 9970628
    Abstract: An LED unit module, a light-emitting device, and a light source system. The LED unit module comprises a substrate and an LED chipset arranged on the substrate. The LED chipset comprises at least five LED chips, where the LED chips are in a tight arrangement with each other, and the contour of a light-emitting side of the LED chipset is close to a regular hexagon. The LED chipset comprises LED chips of at least four colors, where the four colors are red, blue, green, and amber. The LED unit module allows for prevention of increased etendue and for uniform mixing of lights.
    Type: Grant
    Filed: April 11, 2014
    Date of Patent: May 15, 2018
    Inventor: Quan Zhang
  • Patent number: 9955537
    Abstract: Disclosed is a rectifierless light string that uses bidirectional LEDs. Each LED is illuminated on both the positive and the negative portion of an AC signal so that the AC signal does not have to be rectified. In addition, LEDs are mounted on LED holder plugs, which are designed to allow the LEDs and bypass resistors to be automatically inserted in the LED holder plug. The LED holder plugs are inserted into a light string socket that contains a shunt switch that provides a conduction path when the LED holder plug is not firmly inserted in the light string socket. In this manner, conduction can occur in the light string when the LED holder plug is dislodged.
    Type: Grant
    Filed: June 6, 2017
    Date of Patent: April 24, 2018
    Assignee: 1 ENERGY SOLUTIONS, INC.
    Inventor: Jing Jing Yu
  • Patent number: 9949340
    Abstract: The present invention discloses a color changing light and controlling method and apparatus thereof. The controlling method for a color changing light includes: each terminal of one way of four color substrate being connected together and acted as a common end, the common end being connected to a first voltage; two ways of the four color substrate being set up as a group, other terminals of the two ways being connected to a second voltage and a third voltage respectively; and polarities and voltages of the first voltage, the second voltage, and the third voltage being adjusted to turn on or turn off the four color substrate.
    Type: Grant
    Filed: January 22, 2017
    Date of Patent: April 17, 2018
    Assignee: NINGBO WELL ELECTRIC APPLIANCE CO., LTD.
    Inventor: Guolin Yu
  • Patent number: 9936549
    Abstract: Lighting and/or display device with low-voltage individual lighting components such as a light-emitting diode, characterized in that it comprises a plurality of individual modules (1) electrically connected together so as to be able to be arranged in series, at least one module comprising a lower terminal (2) and a upper terminal (3), between which are arranged at least two individual lighting components and a plurality of switches (5, 7, 8), so as to be able to arrange two individual lighting components in series or in parallel between the two lower (2) and upper (3) terminals.
    Type: Grant
    Filed: August 25, 2015
    Date of Patent: April 3, 2018
    Assignee: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
    Inventor: Ghislain Despesse
  • Patent number: 9907135
    Abstract: For controlling a level of luminance produced by a color light-emitting diode (LED) array, a method includes: for a predetermined flux bit-slice period, activating a color enable signal to select a primary color LED and to select a predetermined light flux magnitude set-point; selectively charging an energy storage device and discharging the energy storage device through the selected primary color LED to generate a light flux output during the flux bit-slice period; adjusting a rate of selectively charging the energy storage device to maintain a magnitude of the light flux output at the predetermined light flux magnitude set-point during the flux bit-slice period; and adjusting the predetermined light flux magnitude set-point over the life of the selected LED as the selected LED ages as a function of an anode-to-cathode voltage drop across the selected LED for a given magnitude of current flowing through the selected LED.
    Type: Grant
    Filed: January 20, 2017
    Date of Patent: February 27, 2018
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Jeffrey Scott Farris, Michael David McCormick, Jason Ryan Thompson
  • Patent number: 9872355
    Abstract: A control circuit for an LED driving circuit having a rectifier and a power transistor for driving an LED load, can include: a control signal regulation circuit configured to control a driving voltage of the power transistor to vary with a rectifier output voltage to control the variation of a current flowing through the power transistor to be consistent with that of the rectifier output voltage to decrease a power loss of the power transistor; and the control signal regulation circuit being configured to control the driving voltage of the power transistor to vary with the rectifier output voltage to control the variation of the current flowing through the power transistor to be opposite to that of the rectifier output voltage to improve a power factor of the LED driving circuit.
    Type: Grant
    Filed: April 24, 2017
    Date of Patent: January 16, 2018
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Jianxin Wang, Huiqiang Chen
  • Patent number: 9872358
    Abstract: A light unit (10) is disclosed including a plurality of lighting devices (22, 24, 26), in particular a plurality of LEDs, for emitting light. The light unit comprises connection terminals (12, 14) for connecting the light unit to an external power supply (16) and for receiving an input voltage (V10) and/or an input current (IT) from the external power supply. A first current path (18) and a second current path (20) are connected to the connection terminals each comprising at least one lighting device, wherein the first current path and the second current path are connected in parallel to each other. The second current path has a controllable resistor (28) for controlling an electrical current I1 in the second current path and a current limiter (30) for limiting the current in the second current path.
    Type: Grant
    Filed: October 22, 2014
    Date of Patent: January 16, 2018
    Assignee: PHILIPS LIGHTING HOLDING B.V.
    Inventors: Johannes Gerrit Jan Beijer, Bertrand Johan Edward Hontele, Patrick Alouisius Martina De Bruycker
  • Patent number: 9863878
    Abstract: In order to carry out various analyses at high accuracy in a site where analysis is needed using a disposable microchip, the microchip is disposed on a display of a tablet terminal device, and a sample or specimen is dropped into a flow path of the microchip to trigger a reaction of the sample in the microchip. Light emitted from the display of the tablet terminal device is applied to the microchip, and the reaction caused by the applied light in the microchip is measured. When an induced fluorescence method using the applied light is adopted as a measuring method, fluorescence that corresponds to the reaction is observed, and detected by, for example, a built-in camera of the tablet terminal device. The detection signal is analyzed by an arithmetic unit of the tablet terminal device.
    Type: Grant
    Filed: February 20, 2014
    Date of Patent: January 9, 2018
    Assignees: USHIO DENKI KABUSHIKI KAISHA, KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION
    Inventors: Yuji Oki, Kinichi Morita
  • Patent number: 9867243
    Abstract: Apparatus and associated methods reduce harmonic distortion of a excitation current by diverting the excitation current substantially away from a number of LEDs arranged in a series circuit until the current or its associated periodic excitation voltage reaches a predetermined threshold level, and ceasing the current diversion while the excitation current or voltage is substantially above the predetermined threshold level. In an illustrative embodiment, a rectifier may receive an AC (e.g., sinusoidal) voltage and deliver unidirectional current to a string of series-connected LEDs. An effective turn-on threshold voltage of the diode string may be reduced by diverting current around at least one of the diodes in the string while the AC voltage is below a predetermined level. In various examples, selective current diversion within the LED string may extend the input current conduction angle and thereby substantially reduce harmonic distortion for AC LED lighting systems.
    Type: Grant
    Filed: February 1, 2016
    Date of Patent: January 9, 2018
    Assignee: Once, Inc.
    Inventor: Zdenko Grajcar
  • Patent number: 9867240
    Abstract: A filter circuit comprising a first feedback circuit configured to: receive a sensed-voltage-level-signal representative of a sensed voltage across a current sensing element; receive a voltage-set-point-signal; and set a regulation-control-signal for a current regulation device such that the sensed-voltage-level-signal tends towards the voltage-set-point-signal. The filter circuit also comprises a second feedback circuit configured to: receive a predetermined-threshold-signal; and receive a regulation-control-voltage-signal, representative of a voltage level of the regulation-control-signal. The second feedback circuit is configured to adjust the voltage-set-point-signal in accordance with a comparison between the regulation-control-voltage-signal and the predetermined-threshold-signal.
    Type: Grant
    Filed: June 14, 2016
    Date of Patent: January 9, 2018
    Assignee: NXP B.V.
    Inventors: Leendert van den Broeke, Tobias Doom
  • Patent number: 9854649
    Abstract: The invention relates to a method for transmitting information from an operating device (K) for lamps (L), in particular a converter for LEDs, to a control unit (ST) connected to the operating device (K) via voltage supply lines (8, 9) thereof, having the following steps: the control unit (ST) preferably periodically temporarily interrupts an AC supply voltage (Vin) of the operating device (K), and the operating device (K) applies a voltage signal (V2) to the voltage supply lines (8, 9) during the interruption of the AC supply voltage (Vin) which is evaluated by the control units (ST) as information.
    Type: Grant
    Filed: March 11, 2015
    Date of Patent: December 26, 2017
    Assignee: Tridonic GmbH & Co KG
    Inventors: Frank Lochmann, Patrick Marte, Johannes Bachmann
  • Patent number: 9833098
    Abstract: Apparatus and associated methods may relate to an artificial tree apparatus having a plurality of trunk segments that couple together to provide a plurality of information or command signals to load devices connected thereto. In an illustrative example, one or more branch segments having light emitting devices are connected to the trunk segments to independently receive the electrical power and command signals via a control system. In some implementations, each command signal generated by the control system may include data pertaining to light color and illumination pattern. In some embodiments, each branch segment and associated light emitting devices may be independently controlled via a multi-channel arrangement. In some implementations, each group of light emitting devices may be manually configured via one or more user-interfaces.
    Type: Grant
    Filed: August 20, 2015
    Date of Patent: December 5, 2017
    Assignee: Loominocity, Inc.
    Inventor: Jason Loomis
  • Patent number: 9826581
    Abstract: Solid state lighting apparatuses, systems, and related methods are described. A solid state lighting apparatus includes an array of solid state light emitters arranged on or over the substrate and a plurality of driving components arranged on or over the substrate. The driving components are configured to independently activate and deactivate at least some of the solid state light emitters of the array of solid state light emitters during a portion of an alternating current (AC) cycle. A method of providing a solid state lighting apparatus includes providing a substrate, mounting an array of solid state light emitters on or over the substrate, and providing a plurality of driving components on or over the substrate. A solid state lighting system includes a solid state lighting apparatus having an array of solid state light emitters, driving components, and a rectifying circuit for rectifying current supplied to the driving components.
    Type: Grant
    Filed: December 7, 2015
    Date of Patent: November 21, 2017
    Assignee: Cree, Inc.
    Inventors: Jeremy Allen Johnson, Andrew Dan Bendtsen, Christopher P. Hussell, Kurt S. Wilcox, Craig William Hardin
  • Patent number: 9788378
    Abstract: According to one aspect, an LED operating network comprises a first circuit board made of a fiberglass reinforced epoxy laminate having power connection terminals that receive AC power, a rectification element, and at least one of a surge protection element and a fuse element. A second circuit board is made of a heat-dissipative material that receives rectified AC electrical power comprising a plurality of cycles from the first circuit board and having a plurality of LED dies and at least one LED driver circuit. The LEDs are turned on at different points during each of the plurality of cycles.
    Type: Grant
    Filed: February 10, 2015
    Date of Patent: October 10, 2017
    Assignee: Cree, Inc.
    Inventors: Andrew Dan Bendtsen, Kurt S. Wilcox, John Sobieski
  • Patent number: 9788373
    Abstract: A voltage monitor and LED color controller circuit detects wall light dimmer and wall light switch on/off status based upon the output of an LED driver located downstream from the wall light dimmer and switch. Various switch time delays will produce several different outputs from an LED array, enabling wall dimmer switch control of intensity and Correlated Color Temperature (CCT). In addition, a preferred embodiment will first turn on in a default mode with a spectrum that is substantially devoid of violet wavelengths and provides only nominal amounts of blue light, to avoid undesirable disruption of circadian rhythm. In other embodiments, various controls may be provided that permit custom light therapy for various purpose and benefit.
    Type: Grant
    Filed: July 3, 2016
    Date of Patent: October 10, 2017
    Inventor: Mohammed Chowdhury
  • Patent number: 9781782
    Abstract: A lighting apparatus, such as an LED lighting apparatus, includes at least one light-emitting device, a rectifier circuit having an input configured to be coupled to an AC source, and a driver circuit coupled to an output of the rectifier circuit and to the at least one light emitting device. The apparatus further includes an active current limiter circuit coupled to the output of the rectifier circuit and configured to limit a current provided to the driver circuit, such as a current drawn by an EMI filter of the driver circuit, which may cause erratic operation of a dimmer controlling the lighting apparatus.
    Type: Grant
    Filed: September 21, 2012
    Date of Patent: October 3, 2017
    Assignee: Cree, Inc.
    Inventor: Ihor Lys
  • Patent number: 9750092
    Abstract: An LED based lighting system includes a controlled current power supply (CCPS) coupled to provide electrical power to an LED based light engine having a plurality of light emitting diodes electrically coupled in series. The LED based lighting system further includes a controlled voltage power supply (CVPS) electrically coupled to the CCPS. A difference between an output voltage on the output node of the CVPS and an input voltage at the input node of the CCPS is used to adjust the output voltage at the output node of the CVPS.
    Type: Grant
    Filed: September 30, 2016
    Date of Patent: August 29, 2017
    Assignee: Xicato, Inc.
    Inventor: Barry Mark Loveridge
  • Patent number: 9735877
    Abstract: An optical communication device including a plurality of groups of light emitting diode (LED) groups that are turn on according to a control of a lighting and communication control module. The lighting and communication control module is configured to receive an AC input voltage, generate a rectified voltage from the AC input voltage, determine a voltage level of the rectified voltage, sequentially drive the plurality of LED groups according to the voltage level of the rectified voltage, and perform optical communication through the plurality of LED groups only when the voltage level of the rectified voltage is greater than or equal to a preset threshold voltage level.
    Type: Grant
    Filed: November 21, 2013
    Date of Patent: August 15, 2017
    Assignee: Seoul Semiconductor Co., Ltd.
    Inventor: Hye Man Jung
  • Patent number: 9730291
    Abstract: A lighting device includes a light source that emits an illumination light. The light source includes a first group of light emitting diodes (LEDs) that emits a first light and a second group of LEDs that emits a second light. The first light has a first Correlated Color Temperature (CCT), and the second light causes the illumination light to have a warmer CCT. The lighting device further includes a differential amplifier to adjust a current flow through the second group of LEDs. The second light is switched on when a current provided to the light source is below a threshold corresponding to the adjustable reference voltage. The lighting device also includes a current sensor to provide a sensor output signal to a second input of the differential amplifier, the sensor output signal having a second voltage corresponding to the current provided to the light source.
    Type: Grant
    Filed: October 7, 2016
    Date of Patent: August 8, 2017
    Assignee: Cooper Technologies Company
    Inventors: Raymond George Janik, Russell Scott Trask
  • Patent number: 9699843
    Abstract: Disclosed herein is a power supply device for an LED light. The power supply device for an LED light includes a power supply unit for converting input power and providing the converted power to LEDs and a central control unit for controlling an operation of the power supply unit. The power supply unit includes a switching circuit electrically connected to both ends of the LEDs, a switching control circuit configured to control the ON/OFF of the switching circuit, and a dimming control circuit configured to control the amount of power supplied by the power supply unit in response to the ON/OFF of the switching circuit and a dimming control signal received from the central control unit, and the central control unit provides a switching control signal for controlling the switching control circuit in response to the ON/OFF of the LEDs and provides a dimming control signal for controlling the operation of the dimming control circuit.
    Type: Grant
    Filed: April 21, 2016
    Date of Patent: July 4, 2017
    Assignee: LG INNOTEK CO., LTD.
    Inventors: Sang Beom Kim, Joo Hoon Kim, Dong Yeol Han
  • Patent number: 9699845
    Abstract: An error signal generating unit is configured such that (i) in a calibration period, the error signal generating unit is set to a first state in which it amplifies an error signal by amplifying a difference between a predetermined first reference voltage and the lowest one from among multiple first detection voltages, and such that (ii) after the calibration period, the error signal generating unit is set to a second state in which it generates the error signal by amplifying a difference between a second detection voltage and a second reference voltage. A reference voltage setting unit holds, as the second reference voltage, the largest value of the second detection voltage detected in the calibration period.
    Type: Grant
    Filed: June 23, 2016
    Date of Patent: July 4, 2017
    Assignee: ROHM CO., LTD.
    Inventor: Junichi Hagino
  • Patent number: 9681517
    Abstract: A method of controlling a correlated color temperature for light output by a lighting device including a dim-to-warm circuit having a first light channel and a second light channel. The method including receiving a current input; measuring current of the current input to obtain a measured current value; and determining a light control value based on the measured current value. The method further including using the light control value, determining a first current value for applying a first current to the first light channel and determining a second current value for applying a second current to the second light channel; and providing the first current to the first light channel and providing the second current to the second light channel to obtain different desired correlated color temperatures for the light output at different ones of the light control values.
    Type: Grant
    Filed: April 14, 2016
    Date of Patent: June 13, 2017
    Assignee: Hubbell Incorporated
    Inventors: Douglas M. Hamilton, Anthony M. Mackey
  • Patent number: 9668307
    Abstract: A lighting device includes a first LED light source having a first color temperature, a second LED light source having a second, lower color temperature connected in parallel with the first LED light source, and control circuitry operable to apply variable duty cycle frequency modulated power to the first LED light source while continuous power is provided to the second LED light source. A method of operating a lighting device includes providing variable duty cycle frequency modulated power to a first LED light source having a first color temperature, and providing continuous power to a second LED light source having a second, lower color temperature connected in parallel with the first LED light source.
    Type: Grant
    Filed: July 27, 2015
    Date of Patent: May 30, 2017
    Assignee: GE LIGHTING SOLUTIONS, LLC
    Inventors: Bruce Richard Roberts, Timothy Alan Taubert