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    LED lighting systems with TRIAC dimmers and methods thereof
    2.
    发明授权
    LED lighting systems with TRIAC dimmers and methods thereof 有权

    公开(公告)号：US11638335B2

    公开(公告)日：2023-04-25

    申请号：US17023632

    申请日：2020-09-17

    申请人： ON-BRIGHT ELECTRONICS (SHANGHAI) CO., LTD.

    发明人： Liqiang Zhu ,  Jun Zhou

    IPC分类号： H05B47/14 ,  H05B45/10 ,  H05B45/395 ,  H05B45/31 ,  H05B45/345 ,  H05B45/50

    摘要： System and method for controlling one or more light emitting diodes. For example, the system for controlling one or more light emitting diodes includes a current regulation circuit coupled to a cathode of one or more light emitting diodes. The one or more light emitting diodes include the cathode and an anode configured to receive a rectified voltage. Additionally, the system includes a control circuit coupled to the cathode of the one or more light emitting diodes. The control circuit is configured to receive a first voltage from the cathode of the one or more light emitting diodes, compare a second voltage and a threshold voltage, and generate a control signal based at least in part on the second voltage and the threshold voltage. The second voltage indicates a magnitude of the first voltage.

    LED lighting systems with TRIAC dimmers and methods thereof
    3.
    发明授权
    LED lighting systems with TRIAC dimmers and methods thereof 有权

    公开(公告)号：US11570859B2

    公开(公告)日：2023-01-31

    申请号：US17023615

    申请日：2020-09-17

    申请人： ON-BRIGHT ELECTRONICS (SHANGHAI) CO., LTD.

    发明人： Liqiang Zhu ,  Jun Zhou

    IPC分类号： H05B45/10 ,  H05B45/395 ,  H05B45/31 ,  H05B45/345 ,  H05B45/50

    摘要： System and method for controlling one or more light emitting diodes. For example, the system for controlling one or more light emitting diodes includes a current regulation circuit coupled to a cathode of one or more light emitting diodes. The one or more light emitting diodes include the cathode and an anode configured to receive a rectified voltage. Additionally, the system includes a control circuit coupled to the cathode of the one or more light emitting diodes. The control circuit is configured to receive a first voltage from the cathode of the one or more light emitting diodes, compare a second voltage and a threshold voltage, and generate a control signal based at least in part on the second voltage and the threshold voltage. The second voltage indicates a magnitude of the first voltage.

    Two-wire dimmer with improved zero-cross detention
    4.
    发明授权
    Two-wire dimmer with improved zero-cross detention 有权

    公开(公告)号：US11540365B2

    公开(公告)日：2022-12-27

    申请号：US17215332

    申请日：2021-03-29

    申请人： Lutron Technology Company LLC

    发明人： William Zotter ,  Bingrui Yang ,  Henry Kite

    IPC分类号： H05B39/04 ,  H05B39/08 ,  H05B47/16 ,  H05B45/10 ,  H05B47/10 ,  H05B45/305 ,  H05B45/31

    摘要： A lighting device, such as a two-wire lighting control device, may include a controllably conductive device and a control circuit. The controllably conductive device may supply an AC line voltage to a load in response to a dive signal such that the controllable conductive device is non-conductive for a first duration of time and conductive for a second duration of time within a half-cycle of the AC line voltage. The control circuit may receive a signal from the controllably conductive device that represents a voltage developed across the controllable conductive device during the first duration of time. The control circuit may generate a sine-wave-shaped signal that complements the voltage developed across the controllably conductive device during the second duration of time. The control circuit may also filter the signal from the controllably conductive device during the first duration of time and the sine-wave-shaped signal during the second duration of time.

    Dimming mode detection circuit, dimming mode detection method, non-dimming mode detection circuit and LED lighting system
    6.
    发明授权
    Dimming mode detection circuit, dimming mode detection method, non-dimming mode detection circuit and LED lighting system 有权

    公开(公告)号：US11382196B2

    公开(公告)日：2022-07-05

    申请号：US17209521

    申请日：2021-03-23

    申请人： Silergy Semiconductor Technology (Hangzhou) LTD

    发明人： Xiaohua Sun ,  Hao Chen

    IPC分类号： H05B45/30 ,  H05B45/31

    摘要： A dimming mode detection circuit for an LED lighting system that receives an alternating current input voltage and generates a bus voltage to drive an LED load, the dimming mode detection circuit including: a leading edge detection circuit configured to generate a leading edge detection signal by detecting a leading edge of a first voltage representative of the bus voltage in one sine half-wave cycle, in order to determine whether the LED lighting system operates in a leading edge dimming mode; and a trailing edge detection circuit configured to generate a trailing edge detection signal in accordance with a time length of a first interval from a first value of the first voltage in a previous sine half-wave cycle to a second value of the first voltage in a next sine half-wave cycle, in order to determine whether the LED lighting system operates in a trailing edge dimming mode.

    Load control device for high-efficiency loads
    7.
    发明授权
    Load control device for high-efficiency loads 有权

    公开(公告)号：US11350494B2

    公开(公告)日：2022-05-31

    申请号：US17086915

    申请日：2020-11-02

    申请人： Lutron Technology Company LLC

    发明人： Russell L. MacAdam ,  Joseph T. Parent ,  Russell Weightman

    IPC分类号： H05B45/10 ,  H05B45/31 ,  H05B45/3575 ,  H05B45/38 ,  H05B45/50 ,  H05B39/04 ,  H02M5/257 ,  H02M1/00

    摘要： A load control device for controlling power delivered from an AC power source to an electrical load may comprise a thyristor, a gate current path, and a control circuit. The control circuit may be configured to control the gate current path to conduct a pulse of gate current through a gate terminal of the thyristor to render the thyristor conductive at a firing time during a half-cycle of the AC power source. The control circuit may operate in a first gate drive mode in which the control circuit renders the gate current path non-conductive after a pulse time period from the firing time. The control circuit may operate in a second gate drive mode in which the control circuit maintains the gate current path conductive after the pulse time period during the half-cycle.

    Apparatus and method for simultaneously adjusting brightness and color temperature, and LED lamp
    8.
    发明授权
    Apparatus and method for simultaneously adjusting brightness and color temperature, and LED lamp 有权

    公开(公告)号：US11019694B2

    公开(公告)日：2021-05-25

    申请号：US16644628

    申请日：2018-05-25

    申请人： SHENZHEN SENDIS SEMICONDUCTOR CO., LTD

    发明人： Yanquan Mai ,  Xunsheng Deng ,  Bo Chen ,  Xiaoyu Chen ,  Wenpan Wang

    IPC分类号： H05B45/10 ,  H05B45/31 ,  H05B45/20

    摘要： An apparatus and method for simultaneously adjusting brightness and color temperature, and an LED lamp. The apparatus includes a phase control dimmer, a rectification module, a phase detection module, a current control module and an LED module. Cutting the phase of an input alternating current by the phase control dimmer changes the effective voltage of the alternating current, then the cut alternating current is rectified by the rectification module and output to the LED module, thus adjusting the brightness of the LED module; information about the cut phase is detected by the phase detection module and a current control signal is output to a current control module according to the cut phase information, and the current control module controls change in the brightness ratio of mixed colors of the LED module according to the current control signal and adjusts the color temperature of the LED module.