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    DIM TO WARM CONTROLLER FOR LEDS
    2.
    发明申请
    DIM TO WARM CONTROLLER FOR LEDS 审中-公开

    公开(公告)号：US20190239310A1

    公开(公告)日：2019-08-01

    申请号：US16378040

    申请日：2019-04-08

    Applicant: LUMILEDS LLC

    Inventor： Yifeng QIU ,  Jeroen Den BREEJEN

    IPC: H05B33/08

    CPC classification number: H05B33/0866 ,  H05B33/0827 ,  H05B33/083 ,  H05B33/0857 ,  H05B33/086

    Abstract: A control circuit for a light emitting diode (LED) lighting system for achieving a dim-to-warm effect is provided. The control circuit includes an LED controller, a clamp circuit coupled to a set of warm correlated-color-temperature (“CCT”) LEDs, a switch coupled to a set of cool LEDs, and a feedback circuit coupled to the clamp and the switch. The LED controller is configured to control the clamp circuit to clamp current through the set of warm LEDs based on the input current, and control the switch to switch on the set of cool LEDs responsive to the input current being greater than a first threshold level and to switch off the set of cool LEDs responsive to the input current being lower than the first threshold level. The feedback circuit is configured to divert current from the set of warm LEDs to the set of cool LEDs.

    Circuit of dimming and toning based on a driver on board module
    3.
    发明授权
    Circuit of dimming and toning based on a driver on board module 有权

    公开(公告)号：US10143059B1

    公开(公告)日：2018-11-27

    申请号：US15687436

    申请日：2017-08-25

    Applicant: SHENZHEN ANGELED CO., LTD

    Inventor： Youqing Liang ,  Donglei Tian ,  Binhua Deng

    IPC: H05B37/02 ,  H05B33/08

    CPC classification number: H05B33/0866 ,  H05B33/0815 ,  H05B33/0845 ,  H05B33/0851

    Abstract: The invention discloses a circuit of dimming and toning based on a driver on board module, relates to LED driving circuit technology field, which includes a silicon controlled dimming circuit module, a rectifier module, an AC constant current power supply module, a plurality of balanced architecture LED modules, and a color feedback comparison module. The AC constant current power supply module includes a plurality of AC constant current power supply sub units supplying power for the balanced architecture LED modules correspondingly. The color feedback comparison module is located between two balanced architecture LED modules to compare voltages generated thereby and no power contrast feedback between two balanced architecture LED modules is generated when the silicon controlled dimming circuit module adjusts current, so that the color feedback comparison module makes an LED bead thereof to choose road between the balanced architecture LED modules to realize color temperature adjusting.

    DETERMINING PROPERTY OF UNCHANGED LOAD DEVICE
    6.
    发明申请
    DETERMINING PROPERTY OF UNCHANGED LOAD DEVICE 审中-公开

    公开(公告)号：US20180249544A1

    公开(公告)日：2018-08-30

    申请号：US15758266

    申请日：2016-08-16

    Applicant: PHILIPS LIGHTING HOLDING B.V.

    Inventor： Joris Hubertus Antonius HAGELAAR ,  Marcel VAN DER HAM ,  Aart Jan VROEGOP

    IPC: H05B33/08

    CPC classification number: H05B33/0851 ,  H05B33/0815 ,  H05B33/0827 ,  H05B33/0866 ,  H05B33/0893

    Abstract: Determination devices (1) determine properties of load devices (2) that may remain unchanged for said determining and that comprise first channels with first elements (20, 25). The determination devices comprise first switches (10) for providing first invitation signals to the first channels, detectors (15, 16) for detecting first response signals that result from the first invitation signals, and controllers (17) for deriving the properties of the load devices (2) from detections of the first response signals. The properties define first maximum values of first loads of the first channels, and the controllers (17) calculate first maximum duty cycles of first supply signals for supplying the first channels in view of the first maximum values of the first loads and power capacities of power supplies (3) that produce the first supply signals. The load devices (2) may further comprise second channels with second elements (21, 26), and the determination devices (1) may further comprise second switches (11).

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