Plural Load Device Systems Patents (Class 315/210)
  • Patent number: 10998298
    Abstract: A light emitting diode array module includes a plurality of light emitting diode structures. The light emitting diode structures are arranged such that there is an optical cross talk between the light emitting diode structures during operation of the light emitting diode array module. At least a first light emitting diode structure of the plurality of light emitting diode structures is characterized by a first color. At least a second light emitting diode structure of the plurality of light emitting diode structures is characterized by a second color different than the first color. The first color, the second color, and the optical cross talk between the light emitting diodes are arranged to provide a predefined light distribution in a reference plane perpendicular to an optical axis of the light emitting diode array module. A lighting device can include one or more LED array modules.
    Type: Grant
    Filed: December 13, 2017
    Date of Patent: May 4, 2021
    Assignee: Lumileds LLC
    Inventors: Rob Jacques Paul Engelen, Frans Hubert Konijn, Charles André Schrama, Emanuel Nicolaas Hermanus Johannes Stassar, Erno Fancsali, Varun Dev Kakkar, Nicola Bettina Pfeffer
  • Patent number: 10999904
    Abstract: System and method for dimming control of one or more light emitting diodes. An example system includes one or more signal processing components configured to receive a first signal associated with a TRIAC dimmer, process information associated with the first signal, determine whether the TRIAC dimmer is in a first condition or a second condition, generate a second signal based on at least information associated with the first signal, and send the second signal to a switch. The one or more signal processing components are further configured to, if the TRIAC dimmer is determined to be in the first condition, generate the second signal to cause the switch to be opened and closed corresponding to a modulation frequency.
    Type: Grant
    Filed: September 10, 2019
    Date of Patent: May 4, 2021
    Assignee: On-Bright Electronics (Shanghai) Co., Ltd.
    Inventors: Liqiang Zhu, Jun Zhou, Yongsheng Su, Lieyi Fang
  • Patent number: 10945317
    Abstract: A five color temperature switching circuit includes a power supply, an LED driver, a first LED light, a second LED light, a third LED light, a first diode, a second diode, a third diode, a fourth diode, and a switch. The switch has twelve connecting ports. The switch has five regulating stages corresponding to the twelve connecting ports. Thus, the five color temperature switching circuit is provided with three LED lights with three different color temperature values, four diodes, and the switch, such that the lamp provides an illuminating function with five color temperature values.
    Type: Grant
    Filed: January 20, 2020
    Date of Patent: March 9, 2021
    Assignee: Dong Guan Jia Sheng Lighting Technology Co,. Ltd. China
    Inventor: Kevin Hsu
  • Patent number: 10921584
    Abstract: A method for displaying an image includes: acquiring a current total lighting duration of a display device, the current total lighting duration being a current value of a cumulative lighting duration of the display device from a first time the device is lit up; determining a first compensation voltage corresponding to the current total lighting duration of the display device according to a pre-stored corresponding relationship between a total lighting duration and a compensation voltage, the compensation voltage including a compensation sub-voltage corresponding to each color channel of the display device; and adjusting a driving voltage of each pixel of the display device based on the first compensation voltage during display of the image by the display device.
    Type: Grant
    Filed: June 5, 2018
    Date of Patent: February 16, 2021
    Assignee: BEIJING XIAOMI MOBILE SOFTWARE CO., LTD.
    Inventor: Jinze Li
  • Patent number: 10780709
    Abstract: According to one embodiment, an image forming apparatus includes a first heating unit, a second heating unit, and a print controller. The first heating unit includes a first heat source that generates heat with alternating current power. The second heating unit includes a second heat source that generates heat with direct current power. The print controller is configured to control printing using either the first heating unit or the second heating unit.
    Type: Grant
    Filed: July 10, 2019
    Date of Patent: September 22, 2020
    Assignee: TOSHIBA TEC KABUSHIKI KAISHA
    Inventor: Kazuhiko Kikuchi
  • Patent number: 10777062
    Abstract: A wearable device may monitor one or more parameters of a wearer and enter an emergency state based on the values of the monitored parameters. When in the emergency state, the wearable device may connect to a low-power wide area network and transmit an alert to a remote monitoring location.
    Type: Grant
    Filed: December 20, 2018
    Date of Patent: September 15, 2020
    Assignee: BCE INC.
    Inventors: Tony Hui, Jagdip Grewal
  • Patent number: 10724691
    Abstract: A lightbulb comprising a bulb portion (10) in which is housed an illuminating component configured to selectively emit visible light, the lightbulb having a cap portion (16) configured to mount the lightbulb in a light fitting or lamp holder, the cap portion incorporating a adaptor element configured to selectively alter the configuration of the cap portion between a screw fitting and a bayonet fitting.
    Type: Grant
    Filed: July 13, 2017
    Date of Patent: July 28, 2020
    Assignee: Core Lighting Limited
    Inventor: Phil Ion
  • Patent number: 10667364
    Abstract: The invention relates to a lamp dimming circuit with electricity leakage preventing function, includes a power module, a PWM signal conversion module, an optocoupler, an analog signal conversion module, and a controller and a voltage conversion module for connecting the illuminator. By adding the PWM signal conversion module, optocoupler and analog signal conversion module, the external dimming input signals in turn converted into PWM modulation signal, optical signal and analog voltage signal, and transferring the converted analog voltage signal to the controller for processing, and the controller sends the processed signal to the voltage conversion module for processing. Since the voltage signal entering the optocoupler is transmitted in the form of light, and there is no Y capacitor crossover between the power line and the dimming line.
    Type: Grant
    Filed: July 2, 2019
    Date of Patent: May 26, 2020
    Assignee: Self Electronics Co., Ltd.
    Inventors: Junqi Fang, Junjun Ying
  • Patent number: 10655830
    Abstract: An adapter that provides a remote control capability for a light switch is mounted on a support structure (e.g. a wall), and includes a base plate which is also mounted on the support structure to surround the ON/OFF mechanism of the light switch. A cover which can be selectively attached to the base plate establishes an enclosed space between the base plate and the cover. A connector is mounted on the adapter in the enclosed space to interact mechanically with the ON/OFF mechanism of the light switch. The connector also interacts electronically with an activator that is positioned at a remote location. In operation, the connector at the adapter is responsive to an input signal from the remotely located activator that will operate the ON/OFF mechanism. Alternatively, the ON/OFF mechanism can be disconnected from the activator and operated manually.
    Type: Grant
    Filed: September 7, 2018
    Date of Patent: May 19, 2020
    Inventor: Michael A. Tontz
  • Patent number: 10470276
    Abstract: A method of performing a diffused light color temperature switching control for an LED lamp includes using at least a first LED lighting load emitting a first color temperature light and at least a second LED lighting load emitting a second color temperature light, using a light diffuser covering the first LED lighting load and the second LED lighting load to create a diffused light with a diffused light color temperature, using a power allocation circuitry working with a power allocation algorithm to manage different electric powers respectively delivered to at least the first LED lighting load and at least the second LED lighting load while keeping a total electric power unchanged to generate diffused lights with different diffused light color temperatures.
    Type: Grant
    Filed: October 17, 2018
    Date of Patent: November 5, 2019
    Inventor: Chia-Teh Chen
  • Patent number: 10433384
    Abstract: An apparatus can include: a bleeder circuit coupled to a DC bus of an LED driver having a silicon-controlled dimmer; the bleeder circuit being configured to control a voltage of the DC bus to vary in a predetermined manner by drawing a bleed current through a bleed path when in a first mode, and to cut off the bleed path when in a second mode; and a controller configured to control the bleeder circuit to be in the first mode before the silicon-controlled dimmer is turned on.
    Type: Grant
    Filed: April 18, 2018
    Date of Patent: October 1, 2019
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Qiukai Huang, Jianxin Wang, Huiqiang Chen
  • Patent number: 10397993
    Abstract: The invention relates to an LED module (1), comprising: connections (2) for an LED series (3); a circuit (4), which is designed to constitute a load, preferably an active-power load, when a first supply voltage (5a) not equal to zero is applied to the LED module (1), which active-power load is dimensioned in such a way that, when an LED series (3) is connected, said LED series is not conductive, and which is designed to constitute no load when a second supply voltage (5b) not equal to zero is applied to the LED module (1), for which second supply voltage, when an LED series (3) is connected, said LED series is conductive and light is emitted, wherein the type of load change is selected in dependence on the value of the first supply voltage and/or a modulation of the first supply voltage.
    Type: Grant
    Filed: November 26, 2014
    Date of Patent: August 27, 2019
    Assignee: Tridonic GmbH & Co KG
    Inventor: Günter Marent
  • Patent number: 10362647
    Abstract: A amplitude dimming power supply for constant-voltage LED lamp group comprises a maximum current signal conversion module, a DAC module electrically connected with the maximum current signal conversion module, a dimming signal output module, a signal processing module electrically connected with the dimming signal output module and the DAC module, a lamp group current sampling module, and a comparison control input module. The present invention is directed to the constant-voltage LED lamp group amplitude dimming, the dimming current is based on constant-voltage LED lamp group real-time changes. Constant-voltage LED lamp group maximum dimming current determines the duty cycle and the amplitude of the PWM signal output by the maximum current signal conversion module, so that the maximum dimming current of the amplitude dimming power of the constant-voltage LED lamp group is always equal to the total current of the current LED lamp group.
    Type: Grant
    Filed: June 25, 2018
    Date of Patent: July 23, 2019
    Assignee: Self Electronics Co., Ltd.
    Inventor: Dong Wu
  • Patent number: 10356859
    Abstract: A phase controller includes a plurality of pulse width modulation (PWM) circuits, a plurality of switching devices, a computing unit, and a latency generator. The plurality of PWM circuits output pulse signals. The plurality of switching devices are coupled to the respective plurality of PWM circuits, and switch on and off based on the pulse signals. The computing unit calculates the pulse signals to be output from the plurality of PWM circuits, based on outputs of the plurality of switching devices. The latency generator generates latency in any of the pulse signals so that edge positions of the pulse signals output from the plurality of PWM circuits do not collide with each other, wherein the pulse signals change values at the edge positions.
    Type: Grant
    Filed: January 4, 2018
    Date of Patent: July 16, 2019
    Assignee: Cypress Semiconductor Corporation
    Inventors: Takuya Kurishita, Yukisato Miyazaki
  • Patent number: 10356865
    Abstract: A lighting apparatus including a light emitting diode connected to a dimmer configured to modulate an input AC voltage depending on a selected dimming level, a rectifier configured to full-wave rectify the modulated AC voltage output from the dimmer to generate and output a driving voltage, a driving module configured to receive the driving voltage of the rectifier to detect the selected dimming level, and select one of three driving modes of a stop mode, a resistance driving mode, and a sequential driving mode depending on the detected dimming level, and a plurality of light emitting diode groups configured to emit light depending on a control of the driving module.
    Type: Grant
    Filed: July 19, 2018
    Date of Patent: July 16, 2019
    Assignee: Seoul Semiconductor Co., Ltd.
    Inventors: Kwang Bea Lim, Sung Ho Jin, Sang Wook Han, Young Do Jong
  • Patent number: 10321536
    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 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.
    Type: Grant
    Filed: June 13, 2017
    Date of Patent: June 11, 2019
    Assignee: Hubbell Incorporated
    Inventors: Douglas M. Hamilton, Anthony M. Mackey
  • Patent number: 10257902
    Abstract: The invention provides a lighting device (100) comprising a first light source (10) and a second light source (20), a control system (50) configured to control the first light source (10) and the second light source (20), wherein the first light source (10) is configured to provide first light source light (11) having a correlated color temperature (CCT) of at maximum 3000 K and a color rendering index (CRI) of at least 75, and wherein the second light source (20) is configured to provide second light source light (21) having a dominant wavelength selected from the range of (575-780) nm and having a color rendering index of at maximum (70).
    Type: Grant
    Filed: August 11, 2016
    Date of Patent: April 9, 2019
    Assignee: SIGNIFY HOLDING B.V.
    Inventors: Marius Leendert Trouwborst, Berent Willem Meerbeek
  • Patent number: 10222405
    Abstract: A solid state analog device resistant to cyber security hacking is described herein. In one example, the device may include a signal input circuit, a comparator and driver circuit, and a display. The signal input circuit may be configured to detect loss of the input signal and the comparator and driver circuit may be configured to generate a voltage output and a reference power supply voltage from the input signal, wherein the comparator and driver circuit provides for a hardware-only design of the solid state analog device without digital assets, thus reducing cyber security hacking risks of the solid state analog device.
    Type: Grant
    Filed: May 7, 2018
    Date of Patent: March 5, 2019
    Inventor: Otto P. Fest
  • Patent number: 10201064
    Abstract: The present invention refers to an Electrical Power System (EPS) or Power Supply for a smart dimmer for controlling the intensity of illumination of a dimmable lighting load within an electrical installation that has two or three wires in the switch box (two-wire and three-wire switches). The Power Supply is able to detect and control different types of lighting technologies, such as incandescent or LED bulbs. The Power Supply also provides a voltage signal indicating the current consumed by the lighting loads.
    Type: Grant
    Filed: June 7, 2018
    Date of Patent: February 5, 2019
    Assignee: KLEVERNESS INCORPORATED
    Inventors: Gerardo Gomez Soto, Leobardo Stephen Lincoln Strange Zenteno, Dan Nurko Elliot, Jorge Ivan Ramirez Lira
  • Patent number: 10172196
    Abstract: A light unit driver comprising a plurality of light unit driver channels, each light unit driver channel being configured for driving a respective light unit via a respective light unit driver channel output of the light unit driver channel, —a supply rail that is connected to respective power inputs of the light unit driver channels to conduct electrical energy to the light unit driver channels, —a backup energy storage configured for storing electrical energy, —a control device for controlling the light unit driver, The backup energy storage is electrically connected to the light unit driver channel output of one of the light unit driver channels, the light units being connected to the light unit driver channel outputs of the remaining light unit driver channels.
    Type: Grant
    Filed: June 2, 2015
    Date of Patent: January 1, 2019
    Assignee: ELDOLAB HOLDING B.V.
    Inventors: Petrus Johannes Maria Welten, Marc Saes
  • Patent number: 10143047
    Abstract: A lighting control system (LCS) for generating supply currents for at least two LED channels (CH1, CH2, CHn) comprises at least two controlled current sources for generating a supply current for a corresponding LED channel based on a corresponding control signal. The system further comprises at least two signal combiners for generating the corresponding control signals based on a synchronization signal (VSYNC) that comprises periodic starting pulses and on a combination of a magnitude dimming signal and a pulse dimming signal corresponding to one of the LED channels. The signal combiners are designed such that changes of the respective control signals come into effect only with a respective time offset with respect to one of the starting pulses of the synchronization signal.
    Type: Grant
    Filed: March 16, 2016
    Date of Patent: November 27, 2018
    Assignee: Dialog Semiconductor (UK) Limited
    Inventors: David Gamperl, Manfred Pauritsch, Herbert Truppe
  • Patent number: 10141848
    Abstract: An interleaved power factor corrector includes a first PFC component, a second PFC component, a current sampling resistor, a current detection component, a voltage detection component, and a control component. The current detection component is configured to detect a current I1, a current I2 and a current Iin. The voltage detection component is configured to detect a voltage U1 inputted into the interleaved power factor corrector and an output voltage U2. The control component is configured to generate, according to the current I1, current I2, current Iin, voltage U1, voltage U2 and a preset target output voltage, a first PWM control signal and a second PWM control signal, in which the first PWM control signal is different from the second PWM control signal by a half of a carrier period. The interleaved power factor corrector has lower circuit cost.
    Type: Grant
    Filed: October 21, 2014
    Date of Patent: November 27, 2018
    Assignee: MIDEA GROUP CO., LTD.
    Inventor: Guozhu Zhang
  • Patent number: 9872351
    Abstract: A smart dimming network encoder is connected to an alternating current power source having a substantially regular period of cycles. The encoder includes a bipolar switch connecting the alternating current power source to a modified alternating current line, the bipolar switch having an on state permitting the modified alternating current line to conduct alternating current from the alternating current power source and an off state preventing conduction on the modified alternating current line. The encoder includes a processor coupled to the bipolar switch, the processor configured to receive a control signal at a control signal input and to switch the bipolar switch to the off state for an off time having a duration corresponding to the control signal.
    Type: Grant
    Filed: January 4, 2016
    Date of Patent: January 16, 2018
    Inventors: Paul D Rucker, Todd W Hodrinsky
  • Patent number: 9872352
    Abstract: A power supply circuitry compatible with both source type dimmer controls and sink type dimmer controls is provided. The power supply circuitry includes an internal voltage source, a dimmer control type detection circuit, and a configuration circuit. The dimmer control type detection circuit detects a type of a dimmer control that is electrically coupled to the power supply circuitry. The configuration circuit can turn off the internal voltage source upon determining the dimmer control is of the sink type and turn on the internal voltage source upon determining the dimmer control is of the source type. Thus, the internal voltage source may generate a voltage as the dimming control signal. The dimming control signal is fed to a microcontroller that may, for example, generate a series of pulse signals that is provided to a power converter of a load (e.g., light-emitting diode luminaries) based on the dimming control signal.
    Type: Grant
    Filed: April 14, 2017
    Date of Patent: January 16, 2018
    Assignee: Licon Technology Corporation
    Inventors: Andrew Davis, Brent Dae Hermsmeier
  • Patent number: 9839080
    Abstract: A DC-DC converter has a pulse width control circuit producing a sequence of pulses, with an on time, an off time and a switching frequency. The on time as well as the switching frequency are both varied in dependence on a dimming setting.
    Type: Grant
    Filed: December 29, 2014
    Date of Patent: December 5, 2017
    Assignee: PHILIPS LIGHTING HOLDING B.V.
    Inventors: Liwen Zhou, Qi Zhang, Shujin Zhuang
  • Patent number: 9788390
    Abstract: An AC direct drive lamp including a leakage current protection circuit includes an input stage configured to receive external power, a rectification circuit configured to rectify the external power received from the input stage, a control module electrically connected to the output stage of the rectification circuit and configured to sense and control the state of at least one of the rectification circuit, a switch module, and a light source, the switch module connected between the input stage and the control module in a feedback form and configured to switch on/off depending on a predetermined condition, and the light source electrically connected to the control module and configured to radiate light when power is applied.
    Type: Grant
    Filed: September 23, 2016
    Date of Patent: October 10, 2017
    Assignee: LG INNOTEK CO., LTD.
    Inventor: Jong June Park
  • Patent number: 9781793
    Abstract: A circuit for driving a light source includes a power converter coupled between a power source and the light source, and a controller coupled to the power converter. The power converter receives power from the power source and provides a regulated power to the light source. The controller receives a conduction status signal indicating a conduction state of a dimmer coupled between the power source and the power converter, and adjusts the brightness of the light source based on the conduction status signal. The controller also receives an operation indicating signal indicative of operation of an ON/OFF switch coupled to the dimmer, and adjusts color temperature of the light source based on the operation indicating signal.
    Type: Grant
    Filed: November 30, 2015
    Date of Patent: October 3, 2017
    Assignee: 02Micro, Inc.
    Inventors: Tiesheng Yan, Ching-Chuan Kuo, Ying-Chieh Su
  • Patent number: 9750093
    Abstract: A lighting application is provided that includes an LED assembly including a serial connection of two or more LED units, each LED unit including one or more LEDs, each LED unit being provided with a controllable switch for substantially short-circuiting the LED unit. The lighting application further includes a control unit for controlling a drive unit and arranged to receive a signal representing a voltage level of the supply voltage, and control the switches in accordance with the signal. An LED driver is provided that enables to operate a TRIAC based dimmer at an optimal holding current and an LED driver including a capacitor as a switchable buffer.
    Type: Grant
    Filed: January 14, 2016
    Date of Patent: August 29, 2017
    Assignee: ELDOLAB HOLDING B.V.
    Inventor: Petrus Johannes Maria Welten
  • Patent number: 9723701
    Abstract: A light string includes a plurality of lights and a plurality of non-polarity capacitor corresponding to the lights; wherein, the lights are electrically connected in series and to be powered by an AC power supply; each of the non-polarity capacitor is connected in parallel to a corresponding one of the lights. When the light string is powered on, the non-polarity capacitor is charged and absorbs the surge current which may occur. Thus, the voltage dropped on each light rises slowly and the lights are safe. The non-polarity capacitor also performs power compensation and electrical connection.
    Type: Grant
    Filed: December 28, 2015
    Date of Patent: August 1, 2017
    Assignee: DONGGUAN FAYEUNG LIGHTING CO., LTD.
    Inventor: Houhua Han
  • Patent number: 9713206
    Abstract: An LED lighting device includes an auxiliary power supply that supplies power to a control circuit of the LED lighting device that receives an input from a terminal of a light-emitting diode (LED) string of the lighting device that has a substantially lower voltage than the line voltage to which the lighting device is connected. The terminal may be within the LED string, or may be an end of the string. A linear regulator may be operated from the voltage drop across a number of the LEDs in the string so that the energy wasted by the auxiliary power supply is minimized. In other designs, the auxiliary power supply may be intermittently connected in series with the LED string only when needed. The intermittent connection can be used to forward bias a portion of the LED string when the voltage supplied to the LED string is low, increasing overall brightness.
    Type: Grant
    Filed: July 16, 2015
    Date of Patent: July 18, 2017
    Assignee: PHILIPS LIGHTING HOLDING B.V.
    Inventors: John L. Melanson, Eric King, Rahul Singh
  • Patent number: 9693402
    Abstract: The invention relates to a modular LED-light comprising a first module (1) to which an input voltage (9), preferably an AC-supply voltage, is guided, said first module comprising a second sub-module (B), preferably an insulating unit, a DC voltage separating the supply voltage by a galvanic separation being provided on the outlet of said insulating unit, and a control unit (G). Said LED light also comprises a second module (2), preferably a light management module, comprising an additional sub-module (C) which is fed by the DC-initial voltage of the first module (1), preferably a clocked constant flow source which is controlled by a control unit (E) of the second module (2), and an LED-module (F) which comprises at least one LED path (8) and which is supplied by the additional sub-module (C).
    Type: Grant
    Filed: March 21, 2011
    Date of Patent: June 27, 2017
    Assignees: Tridonic AG, Tridonic GmbH & Co. KG
    Inventors: Michael Zimmermann, Eduardo Pereira, Martin Hartmann
  • Patent number: 9674912
    Abstract: A light-emitting diode (LED) driving circuit configured to drive LED units includes a rectification circuit unit to receive an alternating current (AC) power voltage and rectify the AC power voltage to output a unidirectional ripple voltage, a pulse-width modulation (PWM) signal generation unit to generate PWM decision signals. The PWM signal generation unit is configured to sequentially drive the LEDs according to the PWM decision signals.
    Type: Grant
    Filed: June 25, 2015
    Date of Patent: June 6, 2017
    Assignee: Seoul Semiconductor Co., Ltd.
    Inventors: Young Do Jong, Hyun Gu Kang, Hye Man Jung, Kang Nyung Lee
  • Patent number: 9655185
    Abstract: A linear LED driver comprises a transistor having an input terminal coupled to a LED. When the transistor is turned on, the LED is lighted. The linear LED driver further includes a protection circuit for judging whether an instant high voltage variation occurs or not according to at least one of the voltages of a control terminal and an output terminal of the transistor so as to achieve a protection function.
    Type: Grant
    Filed: October 22, 2015
    Date of Patent: May 16, 2017
    Assignee: Richtek Technology Corp.
    Inventors: Jiun-Hung Pan, Tong-Cheng Jao, Yi-Wei Lee, Isaac Y. Chen
  • Patent number: 9633627
    Abstract: A power supply and method of controlling power supplied to a light source are disclosed. The power supply includes a dimming-control voltage generator configured to generate a dimming-control voltage based on first and second adjustment values; a dimming controller configured to output a dimming control signal for controlling analog dimming and pulse width modulation (PWM) dimming of a light source based on the dimming-control voltage; and a driver configured to control the analog dimming and the PWM dimming of the light source based on the dimming control signal.
    Type: Grant
    Filed: August 14, 2015
    Date of Patent: April 25, 2017
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Sung-yong Joo, Jin-hyung Lee
  • Patent number: 9629222
    Abstract: A timing circuit may be enabled when a static signal disables communication through a communications bus, the timing circuit producing a threshold level after being enabled for a predetermined time period, and a switch controlled by the timing circuit is configured to disconnect the static signal when the timing circuit produces the threshold level. A static signal may be used to enable a timing circuit upon the static signal disabling communication through a communications bus, and communication may be allowed through the communication bus by disconnecting the static signal using a switch controlled by the timing circuit, after the timing circuit has been enabled for a predetermined period of time.
    Type: Grant
    Filed: August 27, 2014
    Date of Patent: April 18, 2017
    Assignee: GENERAL ELECTRIC COMPANY
    Inventors: Gang Yao, Benoit Essiambre, Nina Rose Scheidegger
  • Patent number: 9544962
    Abstract: The present invention relates to a driver device and a corresponding driving method for driving a load (22), in particular an LED unit, said driver device comprising power input terminals (51, 52) for receiving a periodic supply voltage from an external power supply potentially including a dimmer for dimming said periodic supply voltage, power output terminals (53, 54) for providing a drive voltage and/or drive current for driving a load (22), a power stage (70a, 70b, 70c, 70d) coupled between the power input terminals and the power output terminals for controlling an input current received from said power input terminals to draw a high power from said external power supply in a first mode or to draw a low or no power from said external power supply in a second mode, said high power being higher than the power required for driving said load and said low power being lower than the power required for driving said load, wherein said power stage controls said input current to be in the second mode only for a perc
    Type: Grant
    Filed: July 25, 2012
    Date of Patent: January 10, 2017
    Assignee: PHILIPS LIGHTING HOLDING B.V.
    Inventors: Reinhold Elferich, Toni Lopez, Harald Josef Günther Radermacher
  • Patent number: 9510410
    Abstract: An electric driver circuit for driving a light-emitting diode may be operated in a regulation operation mode to generate an output voltage to drive a predefined current through the light-emitting diode. The electric driver circuit is operated in a start-up operation mode before the regulation operation mode. The operation of the electric driver circuit in the start-up operation mode enables that a coil current generated in an inductor can be completely discharged before starting the regulation operation mode.
    Type: Grant
    Filed: June 18, 2014
    Date of Patent: November 29, 2016
    Assignee: AMS AG
    Inventors: Mario Teufel, Joachim Lechner
  • Patent number: 9445469
    Abstract: Disclosed is a backlight driving apparatus. The backlight driving apparatus includes a light source configured to include at least one LED, a DC-DC converter configured to generate a driving voltage according to a turn-on of a switching element and supply the driving voltage to the light source, a feedback circuit configured to generate a feedback voltage corresponding to a voltage level of the driving voltage supplied from light source, a duty controller connected to the light source, and configured to control a turn-on period of the LED according to an LED duty signal corresponding to a backlight dimming signal, and a switching controller configured to generate a PWM signal for controlling the turn-on of the switching element according to the feedback signal, generate a switching control signal corresponding to the PWM signal according to the LED duty signal, and selectively control the turn-on of the switching element.
    Type: Grant
    Filed: November 18, 2013
    Date of Patent: September 13, 2016
    Assignee: LG Display Co., Ltd.
    Inventor: Joung Woo Lee
  • Patent number: 9433044
    Abstract: The LED backlight source includes a boost circuit, a current control module, a voltage detection circuit. The boost circuit is configured for boosting an input voltage to an operation voltage needed by a LED string. The current control module connects to a negative end of the LED string to adjust an operation current of the LED string. The voltage detection circuit is configured for detecting whether the input voltage has been decreased, and for providing a control signals to a backlight driving control circuit upon determining the input voltage has been decreased. The backlight driving control circuit is configured for providing first square-wave signals to the boost circuit for boosting the voltage, for providing second square-wave signals to the current control module for adjusting a current, and for decreasing an input current upon receiving the control signals from the voltage detection circuit.
    Type: Grant
    Filed: September 11, 2014
    Date of Patent: August 30, 2016
    Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd
    Inventor: Hua Zhang
  • Patent number: 9426853
    Abstract: In a first aspect, the invention provides an LED converter, comprising: a resonant converter with a switching regulator, preferably a clocked half-bridge converter, a galvanic barrier, the primary side of which being supplied by the switching regulator and the secondary side of which being arranged for providing directly or indirectly power to terminals for connecting one or more LEDs, a control circuit on the primary side of the galvanic barrier of the resonant converter, a sensing means on the secondary side of the galvanic barrier sensing a secondary side electric parameter indicative of an LED load, when connected to said terminals, a feedback path from the sensing means to the control circuit adapted to feedback the secondary side electric parameter from the secondary side of the galvanic barrier to the primary side of the galvanic barrier, wherein in case no LED string is connected to the LED converter, the control unit is adapted to cyclically control a switching frequency of switching regulator switch
    Type: Grant
    Filed: December 19, 2013
    Date of Patent: August 23, 2016
    Assignee: TRIDONIC GMBH & CO KG
    Inventors: Wayne Bell, Paul Dalby, Deepak Makwana
  • Patent number: 9386647
    Abstract: A method for mitigating visual fluctuation of light output at low pulse width modulation levels is disclosed. The method comprises at least the step of comparing the percent change of a previously applied input voltage value to the pulse width modulation output.
    Type: Grant
    Filed: October 21, 2014
    Date of Patent: July 5, 2016
    Assignee: General Electric Company
    Inventors: Anthony Steven White, Nina Rose Scheidegger, Gang Yao
  • Patent number: 9351359
    Abstract: An inductive power transfer system comprises a primary side unit (1) and a secondary side unit (6) with a non-conductive barrier (5) therebetween, the primary side unit having a power supply (2), a transmission coil (4) and a controller (12). The secondary side unit has a receiver coil (7), a controller (8) and a load (9). The secondary side controller (8) is configured to detect the voltage in the receiver coil (7) and to transmit to the primary side controller (12) a control signal requesting an increase or decrease in the power transmitted from the primary side according to whether the voltage in the receiver coil (7) is above or below a predetermined value.
    Type: Grant
    Filed: December 13, 2013
    Date of Patent: May 24, 2016
    Assignees: ALEXSAVA HOLDINGS LIMITED
    Inventor: Mark Chappell
  • Patent number: 9326334
    Abstract: An electronic ballast for operating at least one first cascade of LEDs may include an input for coupling to an AC supply voltage, a rectifier that is coupled to the input, wherein the rectifier has an output having a first and a second output connection, a first unit that includes the first cascade of LEDs, wherein the first unit is coupled to the first output connection of the rectifier, a series circuit including an inphase regulator and a shunt resistor, wherein the series circuit is coupled between the first unit and the second output connection of the rectifier, a setpoint value prescribing apparatus for the inphase regulator having an output that is coupled thereto, wherein the setpoint value prescribing apparatus provides a first setpoint value element at its output, and a second setpoint value element—superimposed on the first setpoint value element—for the inphase regulator.
    Type: Grant
    Filed: August 4, 2014
    Date of Patent: April 26, 2016
    Assignee: OSRAM GmbH
    Inventors: Klaus Fischer, Helmut Endres, Josef Kreittmayr
  • Patent number: 9295126
    Abstract: An illumination module includes a plurality of Light Emitting Diodes (LEDs) located in different zones to preferentially illuminate different color converting surfaces. The flux emitted from LEDs located in different zones may be independently controlled by selectively routing current from a single current source to different strings of LEDs in the different zones. In this manner, changes in the CCT of light emitted from LED based illumination module may be achieved.
    Type: Grant
    Filed: July 10, 2014
    Date of Patent: March 22, 2016
    Assignee: Xicato, Inc.
    Inventor: Gerard Harbers
  • Patent number: 9295117
    Abstract: Disclosed are various embodiments of low cost high quality LED (Light Emitting Diode) retrofit lamp devices capable of operating in a wide range of power and to supersede conventional lighting devices such as incandescent, halogen, sodium or fluorescent lamps. The disclosed embodiments include various LED lamp retrofit apparatuses that maximize the electro-mechanical-optical compatibility of seven interactive systems, such as: LEDs, LED Panel, Supply Adaptor, Housing, Lens/diffuser Shield, In/Out Electrical Wiring an LED driver. LED lamp retrofit apparatuses include incandescent, halogen, fluorescent, and sodium lamps.
    Type: Grant
    Filed: June 16, 2014
    Date of Patent: March 22, 2016
    Assignee: ALTERNATIVE LIGHTING TECHNOLOGIES, INC.
    Inventor: Beniamin Acatrinei
  • Patent number: 9271354
    Abstract: A straight tube LED lamp according to one aspect of the present invention includes: a first LED array including first LED elements connected in series; a second LED array that includes second LED elements connected in series, and emits light having a different emission color from an emission color of the first LED array; a FET switch provided in a path through which current flows to the second LED array; and a constant power output circuit that outputs power without changing a total value of the power, wherein the number of the first LED elements connected in series is greater than the number of the second LED elements connected in series, a total forward voltage of the first LED array is greater than a total forward voltage of the second LED array, and the first LED elements are in alignment with the second LED elements.
    Type: Grant
    Filed: August 13, 2014
    Date of Patent: February 23, 2016
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Akira Takahashi, Kazuhiro Takeda
  • Patent number: 9258861
    Abstract: An apparatus comprises red, green and blue LED strings each having a corresponding switching circuit. Each LED string is divided into a plurality of LED segments. The three LED strings are connected in parallel or in series. Each LED string may be connected in series with a respective current source or share a common current source. A controller controls each switching circuit so that the number of LED segments connected in series in the red, green or blue LED string can be respectively controlled according to a color setting signal and the voltage level of an input voltage. A first control method is provided for controlling the apparatus having a constant input voltage and a second control method is provided for controlling the apparatus having a periodically time-varying input voltage.
    Type: Grant
    Filed: February 2, 2013
    Date of Patent: February 9, 2016
    Assignee: VastView Technology Inc.
    Inventors: Hung-Chi Chu, Yuhren Shen
  • Patent number: 9253854
    Abstract: A circuit (400) is described herein for controlling dimming of a lamp (112), the circuit comprising a switching circuit (422) configured to provide a chopped portion of an input AC power signal, a resettable inverting integrator circuit (426) configured to integrate the chopped portion of the input AC power signal such that a rise time of an output of the resettable inverting integrator circuit is proportional to a positive amplitude of the chopped portion of the input AC power signal and a fall time of the output of the resettable integrator is proportional to a negative amplitude of the chopped portion, such that an energy provided to the lamp based on the output of the resettable inverting integrator circuit is substantially equivalent from cycle-to-cycle of said input AC power signal regardless of a change in amplitude of the input AC power signal from cycle-to-cycle.
    Type: Grant
    Filed: June 2, 2014
    Date of Patent: February 2, 2016
    Assignee: Crestron Electronics Inc.
    Inventor: John Torre
  • Patent number: 9226355
    Abstract: A current supply is coupled to a light source. The current supply is further coupled to a controller. The controller is configured to provide a stochastic control signal to the current supply, wherein the stochastic control signal controls a light intensity output of the light source.
    Type: Grant
    Filed: July 2, 2013
    Date of Patent: December 29, 2015
    Assignee: Cypress Semiconductor Corporation
    Inventors: David Van Ess, Patrick Prendergast
  • Patent number: 9220138
    Abstract: Power lighting control methods and systems for solid state lighting are disclosed. For example, a power control system includes a transformer that includes a primary coil configured to receive a first voltage based on an output of a switching circuit, a secondary coil configured to generate a first current based on the first voltage to power a solid-state load, and a bleeder coil coupled to a bleeder switch, and a control module that causes the bleeder switch to turn on incrementally during a dimming event over M power cycles, where M is a positive integer, so as to eliminate or reduce a current step in the first current provided to the solid state load.
    Type: Grant
    Filed: December 4, 2014
    Date of Patent: December 22, 2015
    Assignee: Marvell International Ltd.
    Inventors: Wanfeng Zhang, Hao Peng