SYSTEMS AND METHODS FOR CONSTANT ILLUMINATION AND COLOR CONTROL OF LIGHT EMISSION DIODES IN A POLYPHASE SYSTEM

摘要

In one aspect, a light emission diode (LED) illumination system is capable of providing generally constant illumination by LED ladders coupled to power sources in a polyphase system, where each LED ladder is coupled to a power source respectively. In another aspect, a colored LED illumination system includes multi-color LEDs and is capable of controlling the color output from the LEDs. The colored LED illumination system includes a plurality of LED ladders coupled to a color-mix-control circuit. The color-mix-control circuit can control the output color of the LED ladders by adjusting the intensity of each LED ladder individually.

主权项

1. A circuit for producing generally constant illumination from light emitting diodes (LEDs) in a polyphase system having three or more power sources providing alternating currents, the circuit comprising:
three or more LED ladders, each LED ladder coupled to one of the three or more power sources on a one-to-one basis, the three or more power sources collectively providing a substantially constant electrical power, each LED ladder comprising:
a plurality of light sections connected in series, wherein each light section comprises:an LED, anda switch circuit coupled to the LED and configured to activate the LED,wherein at least two light sections are activated in sequence in response to power supplied from the one of three or more power sources.