A lamp for a vehicle or other object that includes multiple functions. In one aspect, the lamp includes a first circuit for emitting a first color light (such as red light), and at least a second circuit for emitting a second color of light (such as amber light). In another aspect, the lamp optionally includes a microcontroller that may be programmed to control the activation of the different colored lamp circuits based on lamp location information, and based on an operating mode.

Systems and methods are provided to transmit a data encoded power signal to addressable devices. A data signal includes address and command data that varies between logical states. A controller provides a low loss rectified power signal. The controller further provides data within the power signal by forming a positive polarity rectified power waveform corresponding to data in a first state and a negative polarity rectified waveform signal corresponding to data in a second state using substantially loss-less circuitry.

Systems and methods are provided to transmit a data encoded power signal to addressable devices. A data signal includes address and command data that varies between logical states. A controller provides a low loss rectified power signal. The controller further provides data within the power signal by forming a positive polarity rectified power waveform corresponding to data in a first state and a negative polarity rectified waveform signal corresponding to data in a second state using substantially loss-less circuitry.

In one aspect, a device is adapted to transmitting power to, or receive power from, a remote device over first and second communication lines (DALI+, DALI−) and to communicate with the remote device over the first and second communication lines. A first driver implements a first communications protocol which comprises coupling the first and second communication lines together to encode a first signal level and isolating the first and second communication lines from each other to encode a second signal level. This may be a DALI protocol. A second driver implements a second communications protocol which comprises modulating the first communication line with a signal having a low modulation depth. The second communications protocol means there is always a voltage difference between the two communication lines to enable continuous power harvesting. A second aspect relates to efficient power transfer by disabling a current limiter function, when possible.

In one aspect, a device is adapted to transmitting power to, or receive power from, a remote device over first and second communication lines (DALI+, DALI−) and to communicate with the remote device over the first and second communication lines. A first driver implements a first communications protocol which comprises coupling the first and second communication lines together to encode a first signal level and isolating the first and second communication lines from each other to encode a second signal level. This may be a DALI protocol. A second driver implements a second communications protocol which comprises modulating the first communication line with a signal having a low modulation depth. The second communications protocol means there is always a voltage difference between the two communication lines to enable continuous power harvesting. A second aspect relates to efficient power transfer by disabling a current limiter function, when possible.

The present invention provides a power adaptor for an LED lamp, and an LED lamp system, each of which may achieve the function of light dimming in a current LED lamp without having to modify its original structure(s) wherein the current LED lamp originally could not have the function, or may achieve better dimming control of parallel-connected LED lamps. The power adaptor comprises a power conversion circuit and a dimmer, wherein the power conversion circuit is configured to receive and then convert an external power supply signal into a power signal; and the dimmer is configured to receive the power signal and a dimming instruction and to combine or synthesize the power signal and the dimming instruction to produce an output signal. The LED lamp receives the output signal and performs control of itself according to the manner of controlling provided by a control code in the output signal.

An emergency wayfinding device includes a lighting circuit constructed and arranged to change at least one property of a light emitted from a light emitting element, and an electrical conduit including a plug. The plug of the electrical conduit is constructed configured to be received in a socket and to draw electricity from the socket to power the lighting circuit via the electrical conduit.

An emergency wayfinding device includes a lighting circuit constructed and arranged to change at least one property of a light emitted from a light emitting element, and an electrical conduit including a plug. The plug of the electrical conduit is constructed configured to be received in a socket and to draw electricity from the socket to power the lighting circuit via the electrical conduit.

The present disclosure relates to a dimmable LED lamp illumination system. The dimmable LED lamp illumination system includes: a dimmer and an LED lamp. The dimmer is connected in series between a power input end and the LED lamp, and is used for loading a digital dimming signal onto a power signal, so as to generate a dimming power signal. The LED lamp receives the dimming power signal, demodulates the digital dimming signal, and adjusts the brightness of the LED lamp based on the demodulated digital dimming signal. By using the dimmable LED lamp illumination system of the present disclosure, the deployment of a dimming system is simpler, and the transmission of a digital dimming signal is more stable.

An emitter module for a light-emitting diode (LED) light source may comprise a substrate, and a plurality of emitters mounted to the substrate, where each emitter is configured to produce illumination at a different wavelength, and the number of emitters is greater than four (e.g., five emitters). The emitter module may also comprise a dome mounted to the substrate and encapsulating the plurality of emitters. Each of the plurality of emitters is arranged such that a center of the emitter is located on a circular center line that has a center that is the same as a center of the dome. Each of the plurality of emitters is located on a different primary radial axis of the emitter module. Each of the primary radial axes of the emitter module is equally spaced apart by an offset angle. The emitter module may also comprise an additional one of each of the emitters at each of the different wavelengths (e.g., ten total emitters).