DEVICES AND SYSTEMS HAVING AC LED CIRCUITS AND METHODS OF DRIVING THE SAME

摘要

A lighting device and system having at least one circuit, the circuit having at least two LEDs connected in series, parallel or anti-parallel configuration and at least one current limiting diode. The device or system may be driven with AC or DC power and may further include a sensor and polarity switching circuit to utilize all LEDs within the circuit when drive by DC power.

主权项

1. A lighting system comprising:
at least one circuit having at least two LEDs, the at least two LEDs electrically connected and configured so that when the LEDs are connected to a DC power source at least one LED within the circuit is forward biased by the DC power source, and at least one LED within the circuit is reversed biased by the DC power source; a load sensor connected to the at least two LEDs, wherein the load sensor senses the operation of the at least one LED forward biased by the DC power source; and, a polarity switching circuit capable of reversing the polarity from the DC power source to forward bias the at least one LED previously reverse biased if the operation of the at least one LED which is forward biased fails.