Uni-directional light emitting diode drive circuit in pulsed...

Details Uni-directional light emitting diode drive circuit in pulsed... Uni-directional light emitting diode drive circuit in pulsed...

2009-01-12

2011-11-01

Ismail, Shawki S (Department: 2819)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

Automatic regulation

C315S291000, C315S250000

Reexamination Certificate

active

08049440

ABSTRACT:
The present invention uses the capacitive, inductive, or resistive impedance component to constitute the first impedance, and uses the inductive impedance component and capacitive impedance component which will not produce parallel resonance after parallel connection to constitute the second impedance, whereby the first impedance and the second impedance are series connected for inputting pulsed DC power, and the divided power generated at the two ends of the first or second impedance is rectified to drive the uni-directional light emitting diode.

REFERENCES:
patent: 7518316 (2009-04-01), Yu
patent: 7564198 (2009-07-01), Yamamoto et al.
patent: 7847486 (2010-12-01), Ng
patent: 7902769 (2011-03-01), Shteynberg et al.
patent: 2009/0021175 (2009-01-01), Wendt et al.

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