A lighting system is disclosed that includes elongated LED light fixture with one or more master circuit boards configured to power light emitting diodes. The elongated LED light fixtures include modular light boards with arrays of light emitting diodes that interchangeably couple to the matched connectors on the master circuit board. The system further includes elongated LED light fixtures with telescoping end features, fenestrated diffuser optics at ends of the elongated LED fight fixtures and/or pivoting corner features that join sections of the elongated LED light fixtures.

A LED driving device is provided, which includes a LED string including at least one LED element, at least one channel connected to the at least one LED element, a current regulator configured to regulate a current flowing through the at least one channel according to at least one corresponding control voltage, and a control signal generating circuit configured to generate a control signal based on a difference between a reference voltage and a comparative voltage. The comparative voltage is determined based on a sensing voltage, and the sensing voltage corresponds to an LED current flowing through the LED string. The control signal generating circuit is further configured to generate the at least one corresponding control voltage based on the control signal.

A method for managing image data in a vehicle lighting system, the lighting system including a lighting module and a multiplexed bus for transmitting compressed image data to the lighting module. The method includes receiving an instruction to trigger a lighting function, the lighting function being configured to be generated by the lighting module from compressed image data corresponding to lighting patterns having L rows, L being an integer. Determining the image data to be compressed from among the image data of the lighting patterns of the at least one lighting function by selecting the image data of X rows from the L rows of the lighting patterns, X being an integer smaller than L. Compressing the image data determined as having to be compressed. Transmitting the compressed image data to the lighting module via the multiplexed bus in order for the lighting function to be generated and projected.

An LED lamp is provided. The LED lamp includes a lamp shell and an LED module. The lamp shell includes a socket. The LED module is assembled with the lamp shell, and the LED module includes a circuit board, a plurality of LEDs, and an electronic circuit. The LEDs are electrically connected to the electronic circuit by conductive traces provided on a surface of the circuit board. The LEDs mounted on the other surface of the circuit board are arranged at a center thereof and surrounded by the electronic circuit. The LED module is assembled with the lamp shell, and the socket of the LED lamp is connectable to a power conversion device capable of providing electric power to high-pressure sodium lamp.

A DC-DC converter has a pulse width control circuit producing a sequence of pulses, with an on time, an off time and a switching frequency. The on time as well as the switching frequency are both varied in dependence on a dimming setting.

A lighting system is disclosed. An example lighting system includes at least one light emitting diode (“LED”) circuit having a plurality of LEDs, where the plurality of LEDs includes the same or differently colored LEDs. The lighting system also includes a driver including at least one bridge rectifier and at least one capacitor, a housing including a heat sinking material, and at least two connectors. One of the at least two connectors is adaptable to be connected to the driver and another one of the at least two connectors is adaptable to be connected to an AC power source. The driver is configured to receive an AC voltage from the AC power source and provide a voltage and a current to the at least one LED circuit. Additionally, the driver and the at least one LED circuit are mounted to the housing.

A lighting system is disclosed. An example lighting system includes at least one light emitting diode (“LED”) circuit having a plurality of LEDs, where the plurality of LEDs includes the same or differently colored LEDs. The lighting system also includes a driver including at least one bridge rectifier and at least one capacitor, a housing including a heat sinking material, and at least two connectors. One of the at least two connectors is adaptable to be connected to the driver and another one of the at least two connectors is adaptable to be connected to an AC power source. The driver is configured to receive an AC voltage from the AC power source and provide a voltage and a current to the at least one LED circuit. Additionally, the driver and the at least one LED circuit are mounted to the housing.

A light engine includes a first plurality of diodes coupled in series. The first plurality of diodes includes a first anode end and a first cathode end. A second plurality of diodes is coupled in series. The second plurality of diodes includes a second anode end and a second cathode end. A first terminal is electrically coupled to the first cathode end and said second anode end to form a first node. The second terminal is coupled to said first anode end. A third plurality of diodes is coupled in series. The second plurality of diodes includes a third anode end and a third cathode end. The third terminal is coupled to the third cathode end. A fourth terminal is electrically coupled to the second cathode end and the third anode end to form a first node.

An example circuit includes a plurality of light emitters connected in parallel between a first node and a second node. The circuit also includes a plurality of capacitors, with each capacitor corresponding to one of the light emitters, and a plurality of discharge-control switches, with each discharge-control switches corresponding to one of the capacitors. The circuit further includes a pulse-control switch connected to the plurality of light emitters. During a first period, the pulse-control switch restricts current flow, and each of the plurality of capacitors is charged via the first node. During a second period, one or more of the plurality of discharge-control switches allows current flow that discharges one or more corresponding capacitors. During a third period, the pulse-control switch allows current flow that discharges one or more undischarged capacitors of the plurality of capacitors through one or more corresponding light emitters.

Various embodiments may relate to a drive circuit for an illuminating device and an illuminating device including the drive circuit. The drive circuit includes a main control unit, configured to control power supply to a light-emitting unit, an output unit, connected with the main control unit and comprising a first output terminal and a second output terminal which supply power to the light-emitting unit, and a detecting unit, connected with the output unit for detecting a hot-plug state to obtain a detecting state, wherein the main control unit controls the power supply to the light-emitting unit according to the detecting state.