Abstract:
A controller for controlling a light emitting diode (LED) light engine. The controller includes a temperature sensor configured to sensor temperature at the LED light engine. A current sensor senses a drive current of the LED light engine. A voltage differential sensor senses a voltage differential across LEDs of the LED light engine. A timer monitors a time of operation of the LED light engine. Further, a control device controls the drive current to the LED light engine based on the sensed temperature, the sensed drive current, the sensed voltage differential, and the monitored time of operation. Further, the control device outputs an indication of intensity degradation of an LED, and if the intensity degradation exceeds a predetermined threshold the control can output an indication of such to a user, so that the user can be apprised that the LED needs to be changed.
Abstract:
A device that emits colored flames is disclosed. The device may include one or more electromagnetic coils within a housing. A fuel source may provide fuel such as hydrogen to an igniter at the input to the electromagnetic coil. The fuel may be ignited and a current may flow through the coil that may create a magnetic field. The ignited fuel may ionize creating an electric current that may accelerate the combusting particles through the coil. The current may create a magnetic field that may force the ionized particles into cyclotron orbits. Coloring additive such as salts may be added to the combusting fuel to provide color to the resulting flames.
Abstract:
An LED light that includes an LED light source. A thermoelectric device is configured to maintain the LED light source within a predetermined temperature range. A controller provides a pulse signal to the LED light source, so that the LED light can particularly operate as a strobe light. Such an LED light can find application in an obstruction light.
Abstract:
A device that emits white light is disclosed. The device may include one or more LEDs within an elliptical cavity. The device may also include one or more phosphor elements positioned within the cavity in locations that correspond to the first and second focal points of the ellipse. The cavity may recirculate the light from the LEDs while transmitting the light altered by the phosphor elements.
Abstract:
A manufacturing process for storing measured light output internal to an individual LED assembly, and an LED assembly realized by the process. The process utilizes a manufacturing test system to hold an LED light assembly a controlled distance and angle from the spectral output measurement tool. Spectral coordinates, forward voltage, and environmental measurements for the as manufactured assembly are measured for each base color LED. The measurements are recorded to a storage device internal to the LED assembly. Those stored measurements can then be utilized in usage of the LED assembly to provide accurate and precise control of the light output by the LED assembly.
Abstract:
A manufacturing process for storing measured light output internal to an individual LED assembly, and an LED assembly realized by the process. The process utilizes a manufacturing test system to hold an LED light assembly a controlled distance and angle from the spectral output measurement tool. Spectral coordinates, forward voltage, and environmental measurements for the as manufactured assembly are measured for each base color LED. The measurements are recorded to a storage device internal to the LED assembly. Those stored measurements can then be utilized in usage of the LED assembly to provide accurate and precise control of the light output by the LED assembly.
Abstract:
A controller for controlling a light emitting diode (LED) light engine. The controller includes a temperature sensor configured to sensor temperature at the LED light engine. A current sensor senses a drive current of the LED light engine. A voltage differential sensor senses a voltage differential across LEDs of the LED light engine. A timer monitors a time of operation of the LED light engine. Further, a control device controls the drive current to the LED light engine based on the sensed temperature, the sensed drive current, the sensed voltage differential, and the monitored time of operation. Further, the control device outputs an indication of intensity degradation of an LED, and if the intensity degradation exceeds a predetermined threshold the control can output an indication of such to a user, so that the user can be apprised that the LED needs to be changed.
Abstract:
A system including LED assemblies, which system can efficiently and consistently provide a desired color output. The system includes a network and a plurality of light emitting diode (LED) assemblies connected to the network. Each LED assembly includes a unique address. Further, a control unit is connected to the network and is configured to send light control signals to the LED assemblies individually. The light control signals include color information in a universal color coordinate system. The universal color coordinate system can be the CIE color coordinate system and the network can utilize an Ethernet communication protocol.