Supply Circuit Current And/or Potential Actuated Switch Patents (Class 315/127)
  • Patent number: 10379565
    Abstract: An output driver circuit provides an overcurrent protection function by a simple circuit configuration. The output driver circuit has a constant-current circuit, a constant-current mirror MOS transistor, and a selector circuit. The constant-current mirror MOS transistor and the output MOS transistor constitute a current mirror circuit. The gate of the output MOS transistor is controlled by a voltage based on a constant current generated by the constant-current mirror MOS transistor, thereby limiting the current flowing between the source and the drain of the output MOS transistor.
    Type: Grant
    Filed: October 22, 2014
    Date of Patent: August 13, 2019
    Assignee: ABLIC INC.
    Inventors: Masahiro Mitani, Minoru Ariyama, Daisuke Muraoka, Tomoki Hikichi
  • Patent number: 10375785
    Abstract: System controller and method for a lighting system according to certain embodiments. For example, the system controller includes a first controller terminal configured to receive a first signal, and a second controller terminal coupled to a first transistor terminal of a transistor. The transistor further includes a second transistor terminal and a third transistor terminal. The second transistor terminal is coupled to a first winding terminal of a winding, and the winding further includes a second winding terminal coupled to a capacitor. Additionally, the system controller includes a third controller terminal coupled to the third transistor terminal of the transistor, and a fourth controller terminal coupled to a resistor and configured to receive a second signal. The second signal represents a magnitude of a current flowing through at least the winding, the third controller terminal, the fourth controller terminal, and the resistor.
    Type: Grant
    Filed: December 20, 2017
    Date of Patent: August 6, 2019
    Assignee: On-Bright Electronics (Shanghai) Co., Ltd.
    Inventors: Zhuoyan Li, Liqiang Zhu, Xueyou Ling, Jun Zhou, Lieyi Fang
  • Patent number: 10334679
    Abstract: System controller and method for a lighting system according to certain embodiments. For example, the system controller includes a first controller terminal configured to receive a first signal, and a second controller terminal coupled to a first transistor terminal of a transistor. The transistor further includes a second transistor terminal and a third transistor terminal. The second transistor terminal is coupled to a first winding terminal of a winding, and the winding further includes a second winding terminal coupled to a capacitor. Additionally, the system controller includes a third controller terminal coupled to the third transistor terminal of the transistor, and a fourth controller terminal coupled to a resistor and configured to receive a second signal. The second signal represents a magnitude of a current flowing through at least the winding, the third controller terminal, the fourth controller terminal, and the resistor.
    Type: Grant
    Filed: December 20, 2017
    Date of Patent: June 25, 2019
    Assignee: On-Bright Electronics (Shanghai) Co., Ltd.
    Inventors: Zhuoyan Li, Liqiang Zhu, Xueyou Ling, Jun Zhou, Lieyi Fang
  • Patent number: 10154563
    Abstract: Electronic ballast for controlling at least one load, for example a lamp such as an LED, a fluorescent lamp, a gas discharge lamp or the like, comprising at least one resonant converter for generating a start and/or operating voltage from a rectified mains voltage of a mains voltage supply and comprising a mains rectifier for rectifying the mains voltage, where the electronic ballast has an electronic switching device that switches off the mains voltage supply in the event of emergency lighting, an emergency voltage can be fed into the electronic ballast, and different voltages can be determined and/or operating frequencies of the electronic ballast can be adjusted by way of an intermediate voltage circuit and/or an operating frequency circuit.
    Type: Grant
    Filed: September 17, 2014
    Date of Patent: December 11, 2018
    Assignee: EATON PROTECTION SYSTEMS IP GMBH & CO. KG
    Inventor: Johannes Frücht
  • Patent number: 10129943
    Abstract: A dimmable LED module configured for electrical connection with an AC mains power supply via a switch (9), the dimmable lighting module including a plurality of activatable LED light sources configured for emitting a corresponding lighting characteristic when activated, and, a control unit (4) configured for selectably activating at least one of the plurality of LED light sources in response to a control signal generated by a predetermined switching operation of the switch (9) that is received by the control unit (4) such that a plurality of lighting modes are able to be selectably output from the dimmable LED module corresponding to the at least one of the plurality of LED light sources that are selectably activated by the control unit (4), the plurality of lighting modes being indicative of a resulting lighting characteristic emitted by the at least one of the plurality of selectably activated LED light sources corresponding to the lighting modes, wherein the plurality of lighting modes include at least a f
    Type: Grant
    Filed: October 28, 2014
    Date of Patent: November 13, 2018
    Assignee: TAOLIGHT COMPANY LIMITED
    Inventors: Huahui Li, Bertrand Delalande, Jerome Leroy, Libo Wu
  • Patent number: 10104742
    Abstract: An LED lighting device or LED lamp comprises one or more LED packages, and a switch comprising at least two selectable positions. At least one selectable position corresponds to a set operating mode and one selectable position corresponds to a configurable operating mode. When the switch is in the selectable position corresponding to the set operating mode, responsive to receiving an indication of user input for selecting user-selected operating light qualities, the one or more LED packages continue to be operated in accordance with the predefined operating light qualities corresponding to the set operating mode. When the switch is in the selectable position corresponding to the configurable operating mode, responsive to receiving an indication of user input for selecting user-selected operating light qualities, operation of the one or more LED packages is modified in accordance with the user-selected operating light qualities.
    Type: Grant
    Filed: September 15, 2017
    Date of Patent: October 16, 2018
    Assignee: Feit Electric Company, Inc.
    Inventor: Brian Halliwell
  • Patent number: 10079551
    Abstract: A symmetry control circuit for a trailing edge phase control dimmer circuit for controlling alternating current (AC) power to a load, the symmetry control circuit including: a bias signal generator circuit configured to monitor non-conduction periods of each half cycle of said AC power for an elapsed duration of the non-conduction periods, and generate a bias signal voltage based on the elapsed duration, whereby an amplitude of the bias signal voltage is proportional to the elapsed duration of the non-conduction periods; and a bias signal converter circuit configured to convert the bias signal voltage to a bias signal current, wherein the bias signal current is added to a reference current of a conduction period timing circuit configured to determine said conduction periods, and wherein the conduction period timing circuit is configured to alter one of the conduction periods immediately following one of the non-conduction periods based on the bias signal current when added to the reference current to compensa
    Type: Grant
    Filed: May 20, 2015
    Date of Patent: September 18, 2018
    Assignee: Ozuno Holdings Limited
    Inventor: James Vanderzon
  • Patent number: 10027236
    Abstract: A controller for use in a power converter includes a sense circuit coupled to generate a feedback signal representative of an output voltage of the power converter. A feedback reference circuit coupled to generate a drive signal in response to the feedback signal. An output power control circuit coupled to receive a current sense signal representative of an output current of the power converter and a power signal representative of a desired value of an output power of the power converter via an interface. The controller modifies the output voltage to regulate to the output power to the desired value.
    Type: Grant
    Filed: February 21, 2017
    Date of Patent: July 17, 2018
    Assignee: Power Integrations, Inc.
    Inventors: Yury Gaknoki, Zongqi Hu, Xiang Wu
  • Patent number: 9992849
    Abstract: A dimmer circuit configured for detecting an overvoltage event comprising a controller, a plurality of dimming transistors, a current sensor, and an overvoltage protection device coupled across at least one of the plurality of dimming transistors. The dimmer circuit generates a transistor drive signal to drive the plurality of dimming transistors at a reverse phase dimming mode and provides a dimmed hot output signal to a load. After driving at least one of the dimming transistors to turn off, the dimmer circuit receives from the current sensor a detected current level (I) of the dimmed hot output signal at a turn off time threshold (Tth) and compares the detected current level (I) to a current threshold (Ith). The dimmer circuit detects an overvoltage event when the detected current level (I) is above the current threshold (Ith) because this indicates that the overvoltage protection has tripped.
    Type: Grant
    Filed: August 15, 2017
    Date of Patent: June 5, 2018
    Assignee: Crestron Electronics, Inc.
    Inventor: Benjamin Slivka
  • Patent number: 9980355
    Abstract: A light emitting diode (LED) driver provided with a time delay circuit. The time delay circuit includes a power detector which detects whether alternating current (AC) power is applied and outputs a power detection signal when the AC power is applied, a time delayer which receives LED driving power, delays outputting the input LED driving power by a predefined delay time when the power detection signal is output from the power detector, and outputs a delay time completion signal, and a power outputter which outputs the LED driving power when the delay time completion signal is input from the time delayer.
    Type: Grant
    Filed: January 3, 2017
    Date of Patent: May 22, 2018
    Assignee: LG INNOTEK CO., LTD.
    Inventor: Taek Gyu Gim
  • Patent number: 9955561
    Abstract: A ballast circuit for a lighting system using an induction fluorescent lamp utilizes an AC-DC rectification circuit, a DC-DC boost power conversion circuit, a DC-AC half bridge inverter circuit, and a resonating circuit to ignite the lamp and maintain substantially constant power output of the lamp, while the DC-AC half bridge inverter circuit is further comprised of a gate isolation transformer connected in a half bridge inverter schematic which uses a ballast integrated circuit (IC) to drive a high side MOSFET and a low side MOSFET and the gate isolation transformer electrically isolates a gate signal to the high side MOSFET.
    Type: Grant
    Filed: October 3, 2016
    Date of Patent: April 24, 2018
    Assignee: ENVIRONMENTAL POTENTIALS
    Inventors: Andrew C. Pickett, Naveen R. Tera, Robert V. Rawlings
  • Patent number: 9913340
    Abstract: Disclosed are method and device for controlling illumination, belonging to the field of display control technology. The method includes acquiring an environmental brightness, determining a illumination parameter of a visual indicator disposed at a mobile device based on the environmental brightness, and controlling the visual indicator to illuminate based on the illumination parameter.
    Type: Grant
    Filed: December 22, 2016
    Date of Patent: March 6, 2018
    Assignee: Xiaomi Inc.
    Inventors: Lin Liu, Hui Du, Jingmin Feng
  • Patent number: 9866133
    Abstract: Methods of regulating an output voltage of a switched mode power supply having a variable input voltage and a power switch include adjusting a reference voltage to adjust a duty cycle of a control signal for the power switch. The reference voltage may be adjusted as a function of the duty cycle, in response to the duty cycle of the control signal being outside a defined range and/or in the response to a temperature within the switched mode power supply being above a threshold temperature. Other methods include selecting a reference voltage from a plurality of reference voltages based on a determined input voltage and generating a control signal for the power switch as a function of the selected reference voltage to adjust the duty cycle of the control signal. Switched mode power supplies and control circuits for implementing the methods are also disclosed.
    Type: Grant
    Filed: January 10, 2014
    Date of Patent: January 9, 2018
    Assignee: ASTEC INTERNATIONAL LIMITED
    Inventor: Kim Ly Kha
  • Patent number: 9820341
    Abstract: An LED tube lamp includes a lamp tube receiving an external driving signal; a rectifying circuit rectifying the external driving signal to produce a rectified signal; a filtering circuit filtering the rectified signal to produce a filtered signal; an LED lighting module comprising a driving circuit and an LED module, the driving circuit, in a first driving mode, receiving the filtered signal to produce a first driving signal for driving the LED module to emit light; and a mode switching circuit receiving the filtered signal as a second driving signal in a second driving mode for driving the LED module to emit light. Wherein, the first driving mode and the second driving mode are determined based on the external driving signal.
    Type: Grant
    Filed: June 23, 2016
    Date of Patent: November 14, 2017
    Assignee: Jiaxing Super Lighting Electric Appliance Co., Ltd.
    Inventors: Aiming Xiong, Xintong Liu
  • Patent number: 9795019
    Abstract: A dimmable ballast circuit for a compact fluorescent lamp controls the intensity of a lamp tube in response to a phase-control voltage received from a dimmer switch. The ballast circuit comprises a phase-control-to-DC converter circuit that receives the phase-control voltage, which is characterized by a duty cycle defining a target intensity of the lamp tube, and generates a DC voltage representative of the duty cycle of the phase-control voltage. Changes in the duty cycle of the phase-control voltage that are below a threshold amount are filtered out by the converter circuit, while intentional changes in the duty cycle of the phase-control voltage are reflected in changes in the target intensity level and thereby the intensity level of the lamp tube.
    Type: Grant
    Filed: March 22, 2016
    Date of Patent: October 17, 2017
    Assignee: Lutron Electronics Co., Inc.
    Inventor: Donald F. Hausman, Jr.
  • Patent number: 9769890
    Abstract: An LED driver circuit and a method prevent LED turn-off flash when input power is lost to the driver circuit. The driver circuit includes a DC-DC converter that provides an LED drive voltage to an LED load. A voltage drop sensing circuit detects the loss of input power and discharges a filter capacitor that provides operating power to a controller in a DC-DC converter. The controller turns off to halt the operation of the DC-DC converter before the voltage provided to the LED load decreases to a turn-off threshold of the LED load. The DC-DC converter cannot recharge a load capacitor across the LED load. Thus, once the LEDs in the LED load turn off, the LEDs remain off until the input power is restored.
    Type: Grant
    Filed: August 3, 2016
    Date of Patent: September 19, 2017
    Assignee: Universal Lighting Technologies, Inc.
    Inventors: Wei Xiong, Candice Ungacta, Danny Pugh
  • Patent number: 9750096
    Abstract: The LED tube lamp includes a lamp tube configured to receive an external driving signal; a rectifying circuit configured to rectify the external driving signal to produce a rectified signal; a filtering circuit coupled to the rectifying circuit, and configured to filter the rectified signal to produce a filtered signal, wherein the filtering circuit has a first filtering output terminal and a second filtering output terminal; an LED lighting module coupled to the filtering circuit, wherein the LED lighting module includes a driving circuit having a first driving output terminal and a second driving output terminal and configured to receive the filtered signal to produce a driving signal, and an LED module configured to receive the driving signal and emit light; and a mode switching circuit coupled to at least one of the first and the second filtering output terminal and at least one of the first and the second driving output terminal, and configured to determine to perform one of a first driving mode and a se
    Type: Grant
    Filed: December 12, 2016
    Date of Patent: August 29, 2017
    Assignee: Jiaxing Super Lighting Electric Appliance Co., Ltd.
    Inventors: Aiming Xiong, Xintong Liu
  • Patent number: 9722485
    Abstract: A switching power supply device includes a switching circuit and a control circuit. The switching circuit includes multiple switching elements, an inductor, and a capacitor. The control circuit compares an input voltage of the switching circuit with a predetermined threshold voltage set for an operation switch, and controls the switching circuit to perform the operation switch between at least two power control operations based on a comparison result. The at least two power control operations includes at least two of a buck operation, a buck-boost operation, or a boost operation. The control circuit further performs an inrush current restriction operation in response to the operation switch in order to restrict a flowing of an inrush current to one of the switching elements, which turns on and outputs the input voltage through the inductor in response to the operation switch.
    Type: Grant
    Filed: November 20, 2014
    Date of Patent: August 1, 2017
    Assignee: DENSO CORPORATION
    Inventors: Yuki Mikami, Yoshiyuki Kawase, Toru Itabashi
  • Patent number: 9560700
    Abstract: An illumination lamp includes: an input portion connectable to any one of power supply portions for two or more starting methods including a rapid-start method; a voltage detection circuit configured to detect a voltage applied from a power supply portion; and a control portion including at least one first voltage supply portion configured to supply a voltage suitably for the rapid-start method to a semiconductor light-emitting device, and at least one second voltage supply portion configured to supply a voltage suitably for the other fluorescent-lamp starting method to the semiconductor light-emitting device. The control portion causes, if the voltage is detected by the voltage detection circuit, the first voltage supply portion to supply a voltage to the semiconductor light-emitting device, but causing, if the voltage is not detected by the voltage detection circuit, the second voltage supply portion to supply a voltage to the semiconductor light-emitting device.
    Type: Grant
    Filed: October 12, 2015
    Date of Patent: January 31, 2017
    Assignees: RICOH COMPANY, LTD., O2 MICRO, INCORPORATED
    Inventors: Masaharu Urano, Hiroshi Yamazaki
  • Patent number: 9544959
    Abstract: A light-emitting diode (LED)-based solid-state universal lamp using a ballast compatible and AC-mains operable (BA) LED driving circuit with a power factor correction (PFC) and control device operates normally for a regulated power and current from either ballast or AC mains. The BA LED driving circuit is configured to operate in a wide range of input voltages and frequencies, especially for various high voltages and high frequencies associated with various ballasts. With a cycle-by-cycle current control and power switching at a constant on-time and varied off-time, an over-rated surge current is limited, preventing occasional fire hazards occurred in the ballast.
    Type: Grant
    Filed: February 22, 2016
    Date of Patent: January 10, 2017
    Assignee: LIGHTEL TECHNOLOGIES, INC.
    Inventor: Chungho Hsia
  • Patent number: 9485822
    Abstract: A lighting device includes at least first and second lighting circuits configured to receive electric power from a single common DC power supply. First lighting circuit includes a first output capacitor connected between output ends thereof, and a first pre-charge circuit configured to keep a voltage across first output capacitor at a first voltage for first lighting circuit, while a first light source is in OFF state. Second lighting circuit includes a second output capacitor connected between output ends thereof; and a second pre-charge circuit configured to keep a voltage across second output capacitor at a second voltage for second lighting circuit, while a second light source is in OFF state. First and second voltages are set such that a difference between a forward voltage of first light source and the first voltage agrees with a difference between a forward voltage of second light source and the second voltage.
    Type: Grant
    Filed: December 18, 2015
    Date of Patent: November 1, 2016
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Shinichi Murakami, Koji Watanabe, Kazuhiro Kumada, Miyo Kangyo
  • Patent number: 9426862
    Abstract: The invention discloses an LED backlight drive circuit, an LCD device and a driving method. The LED backlight drive circuit includes a power source; an output capacitor and an LED lightbar which is connected in series with a first controllable switch are in parallel connection, and then are arranged between the output terminal and the ground terminal of the power source. The LED backlight drive circuit further includes a first comparator; a cathode of the first comparator is connected to a first reference voltage, an anode of the first comparator is coupled with the output terminal of the power source, and the output terminal of the first comparator is coupled with a control end of the first controllable switch; when the anode voltage of the first comparator exceeds the cathode voltage, the output terminal of the first comparator drives the first controllable switch to be conducted. In the invention, the LED lightbar only can be conducted at the predetermined voltage.
    Type: Grant
    Filed: April 25, 2012
    Date of Patent: August 23, 2016
    Assignee: SHENZHEN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Xiang Yang, Xinming Gao, Fei Li
  • Patent number: 9380685
    Abstract: A device provides a bypass path for leakage current of a neutral-less controller in a lighting control system for selectively supplying line voltage to a load. The device includes a dummy load, a voltage sensor, a bypass switch, a switch controller and a delay timer. The voltage sensor senses line voltage at an output of the neutral-less controller. The bypass switch selectively connects the dummy load in parallel with the lighting load. The switch controller activates the bypass switch to connect the dummy load in parallel with the lighting load when the line voltage is low, providing a bypass path for the leakage current, and deactivates the bypass switch after a delay period to disconnect the dummy load from being in parallel with the lighting load when the line voltage is high. The delay timer implements the delay period in response to the line voltage transitioning from low to high.
    Type: Grant
    Filed: July 5, 2013
    Date of Patent: June 28, 2016
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Deepak Shivaram Shet, Prasannakumar Gore, Sreeraman Venkitasubrahmanian
  • Patent number: 9368310
    Abstract: A disconnector for electric power equipment filled with dielectric liquid, especially transformers, applicable in protecting the operation of electric power equipment. The disconnector contains at least two cylindrical current-limiting fuses situated inside a tank, and each fuse is electrically connected with external phase power supply and through fixed contacts and moving contacts of the disconnector with the active part of the piece of electric power equipment. The disconnector is characterized in that the current-limiting fuses are placed in a common housing, in which a slide with a pilot is situated, and to the slide there are inseparably fixed moving contacts, which move together with the slide when the slide makes a to-and-fro motion. The to-and-fro motion takes place as a result of the operation of a tripping device situated in the current-limiting fuses and of the compression or stretching of springs fixed to the pilot and to a fixing disk.
    Type: Grant
    Filed: December 10, 2013
    Date of Patent: June 14, 2016
    Assignee: ABB TECHNOLOGY AG
    Inventor: Slawomir Ciesielski
  • Patent number: 9357608
    Abstract: The present invention relates to a luminaire based on the same optical principle as the cinema, in which only one image is presented at any given instant of time but the image appears to be in constant movement. According to the invention, each LED lights up simultaneously for an instant of time in a sequential manner, as with television screens. The LED luminaire of the invention includes a configuration of electronic elements in a circuit which controls the lighting of the LED array and which also includes a PIC microcontroller, a CMOS multiplexer and an operational amplifier that can be used to improve the power consumption of the luminaire, lighting control and the lighting quality of the LED luminaire.
    Type: Grant
    Filed: February 20, 2013
    Date of Patent: May 31, 2016
    Assignees: INSTITUCION UNIVERSITARIA COLEGIO MAYOR DE ANTIOQUIA
    Inventor: Juan Camilo Diaz Velez
  • Patent number: 9351366
    Abstract: An isolation dimmer circuit structure includes a control circuit module having an input end for receiving a sensing signal and an output end for outputting a control signal. An optocoupler is provided between the control circuit module and a light source power supply circuit. The light source power supply circuit is further connected to a light source. A protection circuit includes first and second resistors and first and second diodes. The first resistor is connected in series between the positive terminal of a DC power supply and the anode of the first diode, forming a node A, the cathode of the first diode is connected to a first terminal of a control input end connected to a traditional dimmer circuit to form an overvoltage protection mechanism.
    Type: Grant
    Filed: November 27, 2014
    Date of Patent: May 24, 2016
    Assignee: YUJING TECHNOLOGY CO., LTD.
    Inventor: Sen-Tai Yang
  • Patent number: 9326353
    Abstract: A single-pole (two-wire system) phase-controlled trailing-edge light-modulating circuit comprises a full-bridge rectification circuit, a power supply circuit, a light-modulating control circuit, and a voltage detection circuit. The light-modulating control circuit utilizes a CMOS chip and controls a field effect transistor by detecting specific voltage level to perform a trailing-edge phase control action for modulating light output of resistively and/or capacitively loaded light bulbs, e.g. LED light bulbs. The light-modulating control circuit connects to various lighting loads in series. In addition, the triggering circuit and the power supply circuit of are independent to avoid mutual restrictions to each other that might affect the adjustment of the maximum conduction phase angle.
    Type: Grant
    Filed: May 10, 2013
    Date of Patent: April 26, 2016
    Inventor: Yung Pun Cheng
  • Patent number: 9258857
    Abstract: A light emitting system includes a series connection of a light emitting unit and a variable current source, and a voltage conversion device that includes a rectifier circuit and an output circuit. The rectifier circuit rectifies an AC voltage to generate a rectified voltage across a first rectifier output coupled to one end of the series connection of the light emitting unit and the variable current source, and a second rectifier output. The output circuit is coupled between the second rectifier output and another end of the series connection of the light emitting unit and the variable current source, and is configured to generate a direct-current (DC) output voltage.
    Type: Grant
    Filed: July 17, 2014
    Date of Patent: February 9, 2016
    Assignee: RICHTEK TECHNOLOGY CORP.
    Inventors: Tong-Cheng Jao, Yi-Wei Lee, Isaac Y. Chen
  • Patent number: 9240161
    Abstract: A system and method that adjusts a screen brightness of a display, considering an ambient illumination state, are provided. The method includes receiving a signal, corresponding to an event related to an illumination state alteration, from a sensor, confirming the event, and adjusting, if the event is confirmed, a screen brightness of a display unit in accordance with the event.
    Type: Grant
    Filed: July 18, 2013
    Date of Patent: January 19, 2016
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Youngho Cho
  • Patent number: 9232619
    Abstract: A fluorescent electronic ballast including: a rectifier circuit, for receiving an AC power supply and converting the AC power supply into a DC power supply; an inverter circuit, coupled to a fluorescent driver circuit, for converting the DC power supply into a high-frequency AC power supply for driving a fluorescent; and a detection protection circuit, coupled to the rectifier circuit and the inverter circuit, for detecting the DC power supply provided by the rectifier circuit, and cutting off the electric connection between a control chip of the inverter circuit and all of power supply when the voltage of the direct current power supply is lower than a predetermined value, wherein the power supply at least includes the direct current power supply provided by the rectifier circuit.
    Type: Grant
    Filed: May 29, 2014
    Date of Patent: January 5, 2016
    Assignee: DELTA ELECTRONICS, INC.
    Inventors: Ching-Ho Chou, Yung-Chuan Lu, Yen-Yu Chen
  • Patent number: 9192035
    Abstract: A relamping circuit topology to provide a lamping signal in ballast circuits used to power heated filament gas discharge lamps. The relamping circuit includes a low level DC power source, a differential capacitance and a switching device coupled to the differential capacitance. The differential capacitance is configured to produce a relamping signal. The relamping circuit topology also includes an electric current path configured to direct a flow of direct current from the low level DC power supply through a filament of the gas discharge lamp, and to the differential capacitance such that breaking and restoring the electric current path activates the relamping signal.
    Type: Grant
    Filed: July 17, 2012
    Date of Patent: November 17, 2015
    Assignee: GENERAL ELECTRIC COMPANY
    Inventor: Zhu Mao
  • Patent number: 9167665
    Abstract: A control unit controls an operation of an electric power conversion unit so that load current that flows through a light source load becomes a constant value, using electric power setting value that is used to determine a size of electric power that is supplied to the light source load and a current detection value that is detected by a current detection resistor (current detection unit), and a load electric power calculation unit obtains load electric power of the light source load using the electric power setting value and a voltage detection value that is detected by a voltage detection unit, and an input electric power estimation unit corrects a circuit loss for the obtained load electric power and estimates input electric power.
    Type: Grant
    Filed: July 17, 2013
    Date of Patent: October 20, 2015
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Hisaya Takikita, Masafumi Yamamoto, Katsunobu Hamamoto
  • Patent number: 9167650
    Abstract: A light source drive circuit is disclosed which uses a low withstanding voltage transistor is discussed. The light source drive circuit can enhance price competitiveness. Also, the light source drive circuit can allow a current flowing through an LED portion to be eliminated when a PWM signal is not applied. Therefore, the light source drive circuit can enhance a contrast ratio.
    Type: Grant
    Filed: November 26, 2013
    Date of Patent: October 20, 2015
    Assignee: LG DISPLAY CO., LTD.
    Inventors: Hyo Joon Park, Sang Yong Kim
  • Patent number: 9144129
    Abstract: A switchable luminance LED light bulb, including embodiments that may be used with any common commercial fitting.
    Type: Grant
    Filed: December 26, 2012
    Date of Patent: September 22, 2015
    Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: David Munday, Ryan Baker, Julian Dahan, Russell Petersen, Craig Sloan
  • Patent number: 9113505
    Abstract: System and method for igniting one or more high-intensity-discharge lamps. A system includes an ignition controller configured to generate one or more signal pulses for a pulse signal during a first predetermined time period and to cause one or more voltage pulses to be applied to the one or more high-intensity-discharge lamps, the pulse signal changing between a first logic level and a second logic level during the first predetermined time period, each of the one or more signal pulses corresponding to a pulse period, the pulse period being no larger than the first predetermined time period. The ignition controller is further configured to, if the one or more high-intensity-discharge lamps are not successfully ignited after the first predetermined time period, stop generating any signal pulse for the pulse signal for a second predetermined time period, the second predetermined time period being equal to or larger than the pulse period.
    Type: Grant
    Filed: June 19, 2012
    Date of Patent: August 18, 2015
    Assignee: On-Bright Electronics (Shanghai) Co., Ltd.
    Inventors: Huawei Lv, Dongze Yang, Lieyi Fang
  • Publication number: 20150137685
    Abstract: A lamp (10), such as a rapid thermal processing (“RTP) lamp, is sealed with a press seal (30) that contains a fuse (40). A relatively long press seal region is used that accommodates, in addition to the conventional filament leads to the exterior of the lamp, the fuse as well, the fuse (40) being disposed inside an inert-gas filled void (34) which is formed in the press seal (30), the fuse being thus disposed in an inert environment, such as nitrogen. The void (34) is defined by a bubble (36) formed in the press seal. Alternatively, the void (34) can be defined by an inside region of a glass capillary tube (42) that jackets the fuse and is squeezed into the press seal.
    Type: Application
    Filed: March 31, 2014
    Publication date: May 21, 2015
    Applicant: OSRAM SYLVANIA INC.
    Inventors: Arturo De Santiago, Victor Cordero
  • Patent number: 9035576
    Abstract: A portable lighting device, such as a flashlight, with a mechanical power switch and multiple operating modes is provided. The mechanical power switch is disposed in series with the controller for the lighting device and acts as the user interface to the controller to change modes of operation. Because the mechanical power switch is in series with the controller, the portable lighting device does not consume battery power when the mechanical switch is open. A state machine coupled to the controller is polled by the controller each time it is powered up to determine the operational mode of the lighting device.
    Type: Grant
    Filed: March 30, 2012
    Date of Patent: May 19, 2015
    Assignee: Mag Instrument, Inc.
    Inventor: Stacey H. West
  • Patent number: 9035554
    Abstract: A three-stage power adjustable Light Emitting Diode bulb includes a first resistance and a second resistance which is electrically connected to the first resistance in parallel. The first resistance and the second resistance are connected to a rectifier. Multiple Light Emitting Diode units and a limiting resistance are connected between the positive and negative poles of the rectifier. The Light Emitting Diode units each have multiple Light Emitting Diodes. The electric energy consumption of the Light Emitting Diode bulb is reduced and the life of use of the Light Emitting Diode bulb is prolonged. The resistance value of the first and second resistance can be adjusted to have different luminous powers.
    Type: Grant
    Filed: June 7, 2013
    Date of Patent: May 19, 2015
    Inventors: Tai-Hsiang Huang, Kuan-Hsiang Huang
  • Patent number: 9006980
    Abstract: An apparatus and a method for driving a fluorescent lamp are provided. The apparatus submitted by the present invention includes an LC resonator and an automatic frequency tracing circuit. The LC resonator is used for receiving and converting a square signal to generate a sinusoidal driving signal for driving the fluorescent lamp. The automatic frequency tracing circuit is used for making a frequency of the sinusoidal driving signal automatically following a resonant frequency of the LC resonator according to a feedback signal related to the sinusoidal driving signal.
    Type: Grant
    Filed: August 15, 2013
    Date of Patent: April 14, 2015
    Assignee: Beyond Innovation Technology Co., Ltd.
    Inventors: Shih-Chung Huang, Kuang-Yu Jung
  • Patent number: 9006985
    Abstract: A light emitting diode driving integrated circuit with a multi-step current setting function includes a regulator circuit, a variable resistor circuit, and a current generation unit. The regulator circuit provides a supply voltage to a first terminal of at least one series of light emitting diodes to drive the at least one series of light emitting diodes, and regulates a second terminal voltage of the at least one series of light emitting diodes to a target voltage. The variable resistor circuit is used for changing a resistance of the variable resistor circuit in a plurality of steps according to a switching signal. The current generation unit is coupled to the variable resistor circuit for changing current flowing through the at least one series of light emitting diodes in a plurality of steps according to a reference voltage and variation of the resistance of the variable resistor circuit.
    Type: Grant
    Filed: October 9, 2012
    Date of Patent: April 14, 2015
    Assignee: Leadtrend Technology Corp.
    Inventor: Chung-Wei Lin
  • Patent number: 9000678
    Abstract: An LED lamp with an integrated circuit, a rectifier, and a string of series-connected LEDs rectifies an incoming AC signal. The integrated circuit includes power switches that can separately and selectably short out a corresponding one of several groups of LEDs in an LED string across which the rectified AC signal is present. As the voltage across the string increases, the integrated circuit controls the power switches to increase the number of LEDs through which current flows, whereas as the voltage across the string decreases the integrated circuit controls the power switches to decrease the number of LEDs through which current flows. The flow of LED string current is broken to reduce flicker. Alternatively, a valley fill capacitor peaks LED current during the valleys of the incoming AC signal to reduce flicker. LED current is regulated to provide superior efficiency, reliability, power-factor correction, and lamp over-voltage, -current, and -temperature protection.
    Type: Grant
    Filed: June 4, 2013
    Date of Patent: April 7, 2015
    Assignee: Active-Semi, Inc.
    Inventor: Steven Huynh
  • Patent number: 8994275
    Abstract: A non-contact and non-disposable electric induction LED lamp includes a power source and a luminous-radiating unit combined together. The power source is formed with a power source module electrically connected with a first electric induction plate, while the luminous-radiating unit is provided with a second electric induction plate corresponding with the first electric induction plate and electrically connected with an LED module. Thus, the electricity of the power source can be transmitted to the luminous-radiating unit via electromagnetic induction produced between the first and the second electric induction plates to enable the LED module to emit light. The LED lamp of this invention can partially be replaced conveniently and has water proof and dustproof effects.
    Type: Grant
    Filed: January 29, 2013
    Date of Patent: March 31, 2015
    Assignee: Ceramate Technical Co., Ltd.
    Inventor: Robert Wang
  • Publication number: 20150035439
    Abstract: In various embodiments, an electric lamp includes a light source having at least two supply lines configured to supply electrical energy to the light source, and an outer bulb surrounding the light source. The outer bulb is filled with inert gas. The lamp further includes a disconnection mechanism arranged within the outer bulb. At least one of the supply lines is interrupted in the event that the disconnection mechanism is tripped. The disconnection mechanism has a switch.
    Type: Application
    Filed: July 31, 2014
    Publication date: February 5, 2015
    Inventor: Andreas Nittke
  • Patent number: 8946997
    Abstract: Disclosed is an end-of-life detector for gas discharge lamp and the ballast incorporating the same. The end-of-life detector includes a lamp state signal detecting circuit for detecting the lamp state signal of at least one first gas discharge lamp and generating a positive voltage signal and a negative voltage signal accordingly; a comparing circuit for comparing the positive voltage signal with a positive selecting voltage and comparing the negative voltage signal with a negative selecting voltage, and in response thereto generating a positive control signal and a negative control signal; and a positive/negative duty time interval detecting circuit for generating a lamp life state signal which is generated by a difference between a positive duty time interval and a negative duty time interval. The lamp life state signal is varied along with the difference between the positive duty time interval and the negative duty time interval.
    Type: Grant
    Filed: December 29, 2011
    Date of Patent: February 3, 2015
    Assignee: Delta Electronics (Shanghai) Co., Ltd.
    Inventors: Yuanyuan Zhong, Weiqiang Zhang, Jianping Ying
  • Patent number: 8946995
    Abstract: A semiconductor chip includes an LED driver circuit operably coupled to at least one LED and configured to supply a load current to the at least one LED such that an average load current matches a desired current level defined by a drive signal. A temperature measurement circuit is thermally coupled to the LED driver circuit or the LED(s) or both, and is configured to generate, as drive signal, a temperature dependent signal in such a manner that the drive signal is approximately at a higher constant level for temperatures below a first temperature, is approximately at a lower constant level for temperatures above a second temperature but below a maximum temperature, and continuously drops from the higher constant level to the lower constant level for temperatures rising from the first temperature to the second temperature.
    Type: Grant
    Filed: January 23, 2013
    Date of Patent: February 3, 2015
    Assignee: Infineon Technologies Austria AG
    Inventor: Bernd Pflaum
  • Patent number: 8941323
    Abstract: A ceiling lamp adopting a non-separating driver circuit includes a conversion module and a control module. The conversion module converts an input voltage into an operating voltage to drive the LEDs and forming a driving current, and the control module monitors the operating voltage and the driving current to adjust the operating cycle of the conversion module, change the output voltage value of the operating voltage, and linearly change the driving current at a constant current state. The conversion module just executes the power conversion for one time to provide the driving power of the LEDs instead of using the conventional driving method that executes a two-stage power conversion by a separating power converter and a negative booster of the conventional ceiling lamp. Therefore, the ceiling lamp adopting a non-separating driver circuit is capable of lowering the circuit cost and improving the operating efficiency.
    Type: Grant
    Filed: September 13, 2013
    Date of Patent: January 27, 2015
    Assignee: Unity Opto Technology Co., Ltd.
    Inventors: Chih-Hsien Wu, Wei Chang, Kai-Cheng Chuang, Shao-Wei Chiu
  • Publication number: 20150008826
    Abstract: A ceiling lamp adopting a non-separating driver circuit includes a conversion module and a control module. The conversion module converts an input voltage into an operating voltage to drive the LEDs and forming a driving current, and the control module monitors the operating voltage and the driving current to adjust the operating cycle of the conversion module, change the output voltage value of the operating voltage, and linearly change the driving current at a constant current state. The conversion module just executes the power conversion for one time to provide the driving power of the LEDs instead of using the conventional driving method that executes a two-stage power conversion by a separating power converter and a negative booster of the conventional ceiling lamp. Therefore, the ceiling lamp adopting a non-separating driver circuit is capable of lowering the circuit cost and improving the operating efficiency.
    Type: Application
    Filed: September 13, 2013
    Publication date: January 8, 2015
    Applicant: UNITY OPTO TECHNOLOGY CO., LTD.
    Inventors: CHIH-HSIEN WU, WEI CHANG, KAI-CHENG CHUANG, SHAO-WEI CHIU
  • Publication number: 20150002022
    Abstract: A single-pole (two-wire system) phase-controlled trailing-edge light-modulating circuit comprises a full-bridge rectification circuit, a power supply circuit, a light-modulating control circuit, and a voltage detection circuit. The light-modulating control circuit utilizes a CMOS chip and controls a field effect transistor by detecting specific voltage level to perform a trailing-edge phase control action for modulating light output of resistively and/or capacitively loaded light bulbs, e.g. LED light bulbs. The light-modulating control circuit connects to various lighting loads in series. In addition, the triggering circuit and the power supply circuit of are independent to avoid mutual restrictions to each other that might affect the adjustment of the maximum conduction phase angle.
    Type: Application
    Filed: May 10, 2013
    Publication date: January 1, 2015
    Inventor: Yung Pun Cheng
  • Patent number: 8922139
    Abstract: A power supply or driver circuit configured to provide electrical energy at a drive voltage. The driver circuit converts electrical energy at an input voltage to the electrical energy at the drive voltage. A controller is configured to control the power converter to provide electrical energy at the drive voltage. The controller stops operation at an interruption of electrical energy to the driver circuit. The controller is configured to resume operation subsequent restoration of electrical energy to the driver circuit. The controller is configured to maintain the timing voltage above a first voltage level when the controller is in operation and to determine the duration of an interruption of electrical energy to the driver circuit.
    Type: Grant
    Filed: October 2, 2013
    Date of Patent: December 30, 2014
    Assignee: Dialog Semiconductor GmbH
    Inventor: Horst Knoedgen
  • Patent number: 8917020
    Abstract: An electric lamp (1) has two pairs of external connection pins (5) adapted for connecting the lamp to a voltage source for powering an internal lighting module (3). Each pair of pins is disconnected from the lighting module by an open switch (6) unless a non-zero electric voltage is applied to the pair and causes the switch to close. The lamp is therefore safe to handle even in a condition where one pair of pins is connected and the other is not. The lamp may be fitted in a switch-start fixture, providing an ohmic connection between two pins in different pairs, as well as a rapid-start fixture, with a capacitive connection.
    Type: Grant
    Filed: March 15, 2012
    Date of Patent: December 23, 2014
    Assignee: Koninklijke Philips N.V.
    Inventor: William Peter Mechtildis Marie Jans