Led drive circuit

Details Led drive circuit Led drive circuit

1997-03-21

1999-06-15

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Current driver

327515, H01L 3100

Patent

active

059125683

ABSTRACT:
An LED drive circuit comprising a plurality of LEDs coupled together in parallel, the LEDs configured to be powered by a battery. A current source coupled to the LEDs provides a current signal level for driving the LEDs. A current sensor circuit is coupled to the current source and is configured to provide a first indication signal in response to the current signal flowing in the LEDs. A controller circuit is coupled to the current sensor so as to receive the indication signal. The controller circuit is further coupled to the current source so as to provide an appropriate control signal to the current source so that the current drawn through the LEDs remains substantially at a desired level.

REFERENCES:
patent: 4104533 (1978-08-01), Iverson
patent: 4752693 (1988-06-01), Nagano
patent: 5765940 (1998-06-01), Levy et al.

Affiliated with

Also associated with

Rating

Led drive circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Led drive circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Led drive circuit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-404776