Apparatus and methods for deployment of fixtures. The apparatus may include a system for controlling deployed fixtures. The system may receive user commands different devices in different formats. The fixtures may be independently addressable. The fixtures may be magnetically supported by a fixture support. A brace may join two or more fixture supports without reducing space available to support fixtures. The brace may join a fixture support to a fixture support accessory. An accessory may include a variable-angle junction. The fixture may include articulating joints for controlling the direction of a beam. The fixture may include a lens having an electrically controllable beam spread angle. The fixture may be stowable in the fixture support. The fixture may be slidable along a cord to adjust a height of the fixture. The fixture may include an extendable ring. The system may coordinate motions of the fixtures to follow a target. The fixture may include an elongated board. The elongated board may include a non-polar power socket.

The present disclosure provides a driving circuit, configured to couple to a light emitting diode (LED) and a power supply circuit. The driving circuit includes a comparator, a serial input interface, and an integrating unit. The comparator is configured to couple to the LED and determine whether a cathode voltage of the LED is lower than a threshold value and generate a monitoring data. The serial input interface is configured to receive a serial input data from a previous driving circuit. The integrating unit is coupled to the comparator and the serial input interface and configured to integrate the monitoring data and the serial input data to generate an output data. The output data is transmitted to a following driving circuit or feedbacked to the power supply circuit in order to modulate a power voltage that the power circuit provides to the LED.

The present disclosure provides a driving circuit, configured to couple to a light emitting diode (LED) and a power supply circuit. The driving circuit includes a comparator, a serial input interface, and an integrating unit. The comparator is configured to couple to the LED and determine whether a cathode voltage of the LED is lower than a threshold value and generate a monitoring data. The serial input interface is configured to receive a serial input data from a previous driving circuit. The integrating unit is coupled to the comparator and the serial input interface and configured to integrate the monitoring data and the serial input data to generate an output data. The output data is transmitted to a following driving circuit or feedbacked to the power supply circuit in order to modulate a power voltage that the power circuit provides to the LED.

A multi-channel power supply system includes a power supply circuit configured to generate a drive signal for powering a plurality of color channels based on an input power signal, a first current control circuit coupled to a first color channel of the plurality of color channels and configured to adjust a first channel current of the first color channel based on the drive signal and a first reference signal, and to generate a feedback signal to control the drive signal of the power supply circuit, and a channel controller configured generate the first reference signal based on a color temperature according to a black body curve.

A multi-channel power supply system includes a power supply circuit configured to generate a drive signal for powering a plurality of color channels based on an input power signal, a first current control circuit coupled to a first color channel of the plurality of color channels and configured to adjust a first channel current of the first color channel based on the drive signal and a first reference signal, and to generate a feedback signal to control the drive signal of the power supply circuit, and a channel controller configured generate the first reference signal based on a color temperature according to a black body curve.

An example circuit includes a substrate having a surface and electrically conductive lines. The electrically conductive lines extend in a direction substantially parallel to the surface and substantially orthogonal to a virtual centerline. The circuit also includes first and second instances of a driver device having respective first and second sides, and respective line outputs. The line outputs are arranged along the first side of the respective instance of the driver device, and the respective first side of each of the first and second instances of the driver device are nearer the virtual centerline than the second side thereof. The line outputs of the first instance of the driver device are coupled to a first set of the electrically conductive lines, and the line outputs of the second instance of the driver device are coupled to a second set of the electrically conductive lines.

An example circuit includes a substrate having a surface and electrically conductive lines. The electrically conductive lines extend in a direction substantially parallel to the surface and substantially orthogonal to a virtual centerline. The circuit also includes first and second instances of a driver device having respective first and second sides, and respective line outputs. The line outputs are arranged along the first side of the respective instance of the driver device, and the respective first side of each of the first and second instances of the driver device are nearer the virtual centerline than the second side thereof. The line outputs of the first instance of the driver device are coupled to a first set of the electrically conductive lines, and the line outputs of the second instance of the driver device are coupled to a second set of the electrically conductive lines.

A lighting apparatus includes an external controller, a first LED module, a second LED module, a rectifier, a power switch, a manual switch, a light housing and an allocation module. The external controller converts an external signal of an external wall switch to a light intensity signal. The external controller is coupled to the external wall switch. The wall switch is a continuous switch for a user to select a continuous value from a range. The first LED module and the second LED module emit lights of different color temperatures. The rectifier for converts an AC power to a DC power. The power switch is coupled to the rectifier for generating a driving current corresponding to the light intensity signal. The manual switch selects a color temperature setting.

A switch device includes: a switch circuit; a control signal input terminal configured to input a control signal to the switch circuit; a voltage input terminal configured to input an initial voltage to the switch circuit; and a voltage output terminal configured to output an output voltage to a light-emitting device. The switch circuit includes: a first input terminal and a second input terminal electrically connected to the control signal input terminal and the voltage input terminal, respectively; and a first output terminal electrically connected to the voltage output terminal.

An LED bar lighting with uniform illumination includes at least two LED chips, and a bar lens. Each of at least two LED chips includes an optical axis. The bar lens includes an in-light surface profile line and an out-light surface profile line in a cross section perpendicular to the axial direction of the bar lens. The in-light surface profile line includes a first arc and tow second arcs arranged two sides of the first arc. The first arc is tangent to the second arc and the radius of the first arc is smaller than that of the second arc. The radius of the out-light surface profile line is gradually reduced toward two sides thereof from an intersection of the out-light surface profile line and the optical axis. The radius of the out-light surface profile line at the intersection of the out-light profile line and the optical axis is infinite, and the refraction angle at both end points of the out-light surface profile line is 0 degree.