The invention relates to methods for controlling the output of decorative lighting systems, for example a string of holiday lights. The patent describes the use of the I 2 C communications protocol, which provides high data rate and addressing capabilities both to individual LED clusters and to Strings of such clusters that comprise a decorative lighting system.
The I 2 C protocol, says the patent, permits universal control of individual LED clusters in a decorative lighting system by way of a command controller, and process permits individual controller-less and autonomous designs.
Carpenter has previously been granted another patent in related areas and has other patents pending ?C see Carpenter patent reveals new LED control technology and Color Kinetics responds to Carpenter article .
The command controller generally includes a microcontroller for providing a, a plurality of lighting devices, a command of a controller, a plurality of lighting devices (each containing several LEDs) and a flexible cord interconnection. A power supply on the command device provides a power signal for powering the pluralities of illumination devices. The flexible clock includes at least command device provides a power signal for powering the pluralities of illumination devices. Two conductors capable of carrying the data signal, clock signal, and power signal from the command controller.
The IC is responsive to the data signal, clock signal, and power signal and drives the LED signals, determining their blink rates and intensities. One of the LED signals that are electrically interconnected to the command controller. Variant of the IC includes a plurality of pulse-width modulation (PWM) registers that are selectable in combination to drive the LEDs to a blink rate and intensity independent of one another.
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