Current-limiting protection circuit of a remotely controlled...

Details Current-limiting protection circuit of a remotely controlled... Current-limiting protection circuit of a remotely controlled...

2008-07-10

2011-10-11

Choi, Jacob Y (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

Current generator control

C315S307000, C315S310000, C315S311000

Reexamination Certificate

active

08035316

ABSTRACT:
A current-limiting protection circuit of remotely controlled ceiling fan-lamp is disclosed. The current-limiting protection circuit includes a microcontroller unit for detecting rectangular wave signal reflective of the power used by a lamp load. The rectangular wave signal is compared with nominal value. In the case that the positive bandwidth of the rectangular wave signal is larger than the nominal value, it is indicated that the lamp load is in an overloaded state. Under such circumstance, the microcontroller unit controls a lamp load driving unit to change driving manner and lower the power used by the lamp load to a value within the nominal range.

REFERENCES:
patent: 4032817 (1977-06-01), Richmond
patent: 4560909 (1985-12-01), Peil
patent: 4621992 (1986-11-01), Angott
patent: 4716409 (1987-12-01), Hart et al.
patent: 4823069 (1989-04-01), Callahan et al.

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