DRIVE CIRCUIT FOR A LIGHT-EMITTING DIODE LIGHT SOURCE

    公开(公告)号:US20210120648A1

    公开(公告)日:2021-04-22

    申请号:US17134945

    申请日:2020-12-28

    Abstract: A controllable lighting device may utilize a controllable impedance circuit to conduct a load current through an LED light source. The controllable impedance circuit may be coupled in series with a first switching device, which may be rendered conductive and non-conductive via a pulse-width modulated signal to adjust an average magnitude of the load current. The controllable lighting device may further comprise a control loop circuit that includes a second switching device. The second switching device may be rendered conductive and non-conductive in coordination with the first switching device to control when a feedback signal is provided to the control loop circuit and used to control the LED light source. The control loop circuit may be characterized by a time constant that is significantly greater than an operating period of the load current.

    LOAD CONTROL DEVICE HAVING STUCK RELAY DETECTION

    公开(公告)号:US20210118638A1

    公开(公告)日:2021-04-22

    申请号:US17135433

    申请日:2020-12-28

    Inventor: William Zotter

    Abstract: A load control device (e.g., a switching device) for controlling power delivered from an AC power source to an electrical device (e.g., a lighting load) may be configured to detect that a relay is stuck closed and attempt to fix the relay. The relay of the load control device may be adapted to be coupled between the source and the electrical device to control the power delivered to the electrical device so as to generate a switched-hot voltage. The load control device may comprise a detect circuit configured to generate a detect signal indicating a magnitude of the switched-hot voltage, and a control circuit configured to monitor the detect signal. The control circuit may be configured to determine that the relay is stuck closed in response to the detect signal, and to control the relay in order to attempt to fix the relay by repeatedly closing and opening the relay.

    Load control device having a reduced leakage through ground

    公开(公告)号:US10985557B2

    公开(公告)日:2021-04-20

    申请号:US16786287

    申请日:2020-02-10

    Abstract: A load control device for controlling power delivered from an AC power source to an electrical device may be configured to conduct current through earth ground and may disconnect a switching circuit to reduce an amount of current conducted through the earth ground. The load control device may comprise a controllably conductive device configured to control the power delivered from the AC power source to the electrical device so as to generate a switched-hot voltage, a switching circuit electrically coupled with a detect circuit, and a control circuit configured to render the switching circuit conductive and nonconductive. The detect circuit may generate a detect signal indicating a magnitude of the switched-hot voltage. The control circuit may be configured to monitor the detect signal and to render the switching circuit non-conductive after detecting an edge on the detect signal to reduce the total current through the earth ground.

    Seamless connection to multiple wireless controllers

    公开(公告)号:US10965639B2

    公开(公告)日:2021-03-30

    申请号:US15466239

    申请日:2017-03-22

    Abstract: A load control system may be provided including control devices and a system controller. The system controller may be configured to broadcast a service set identifier (SSID) and provide a wireless network connection to a network device. The system controller may provide a web page to the network device, wherein the web page may include an indication of target system controllers. The target system controllers may be used for configuring (e.g., associating) the control devices. The system controller may receive an indication of a target system controller selected to associate the control devices. The system controller may determine an address and port number of the target system controller identified by the network device. The system controller may provide, to the network device, the web page from the target system controller while the network device is connected to the system controller via the wireless network connection.

    Control device for controlling multiple operating characteristics of an electrical load

    公开(公告)号:US10964494B2

    公开(公告)日:2021-03-30

    申请号:US16600216

    申请日:2019-10-11

    Inventor: Shan Shi

    Abstract: A load control device may be configured to control multiple characteristics of one or more electrical loads such as the intensity and color of a lighting load. The load control device may switch from controlling one characteristic of the electrical loads to controlling another characteristic of the electrical loads based on the position of one or more components of the load control device. Such a position may be manipulated by moving the one or more components relative to an idle position of the load control device. The load control device may be a wall-mounted device or a battery-powered remote control device.

    Display and control of load control devices in a floorplan

    公开(公告)号:US10962944B2

    公开(公告)日:2021-03-30

    申请号:US16542756

    申请日:2019-08-16

    Abstract: A load control system may comprise an electrical load control device and/or a computing device. The electrical load control device may control, for example, motorized window treatments (e.g., shades), lighting controls, and/or sensors (e.g., occupancy, radio window, daylight, etc.). For example, a load control device comprising a motorized window treatment may control the position of a covering material in the window treatment. The computing device may comprise a processor and/or a graphical user interface (GUI). The computing device may be a server and/or a user device, such as a wireless user device (e.g., a cellular phone, tablet, or laptop computer). The computing device may be configured to provide graphical representations that may be displayed on a GUI based on load control information.

    CONFIGURING COMMUNICATIONS FOR A LOAD CONTROL SYSTEM

    公开(公告)号:US20210082280A1

    公开(公告)日:2021-03-18

    申请号:US17107506

    申请日:2020-11-30

    Abstract: A load control system may include multiple control devices that may send load control messages to load control devices for controlling an amount of power provided electrical loads. To prevent collision of the load control messages, the load control messages may be transmitted using different wireless communication channels. Each wireless communication channel may be assigned to a load control group that may include control devices and load control devices capable of communicating with one another on the assigned channel. A control device may send load control messages to a load control device within a transmission frame allocated for transmitting load control messages. The transmission frame may include equal sub-frames and load control messages may be sent at a random time within each sub-frame. Control devices may detect a status event within a sampling interval to offset transmissions from multiple control devices based on detection of the same event.

    CONTROLLING LIGHT INTENSITY AT A LOCATION

    公开(公告)号:US20210076475A1

    公开(公告)日:2021-03-11

    申请号:US17081928

    申请日:2020-10-27

    Abstract: A mobile device that is configured for wireless communication may be configured to operate as a remote control device in a lighting control system, controlling one or more lighting control devices of the lighting control system. The remote control device may control the light intensity in a space, for instance at a location of the remote control device, in response to an ambient light intensity measured at the remote control device. The remote control device may define a user interface for receiving an input that indicates a desired light intensity at the location. The remote control device may measure the ambient light intensity at the location via a light detector, compare the measured ambient light intensity to the desired light intensity, and cause the one or more lighting control devices to adjust the ambient light intensity at the remote control device until it agrees with the desired light intensity.

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