Light emitting diode array driving apparatus

Details Light emitting diode array driving apparatus Light emitting diode array driving apparatus

2008-05-13

2010-11-02

Tran, Thuy Vinh (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

Automatic regulation

C315S2090SC, C315S246000, C315S250000

Reexamination Certificate

active

07825612

ABSTRACT:
There is provided a LED array driving apparatus for driving a light emitting array having a plurality of LEDs connected to one another, including: a DC-DC converting part; a current/voltage detecting part detecting a magnitude of a first current flowing through a switching transistor of the DC-DC current converting part to correspondingly output a first current detection voltage, detecting a magnitude of a both-end voltage of the LED array to correspondingly output a LED array detection voltage, and detecting a magnitude of a current flowing through the LED array to correspondingly output a second current detection voltage; and a constant current controlling part controlling an on/off duty of the switching transistor according to the magnitude of the first current detection voltage, the second current detection voltage and the LED array detection voltage detected by the current/voltage detecting part.

REFERENCES:
patent: 7423389 (2008-09-01), Lee
patent: 7557520 (2009-07-01), Chen et al.
patent: 2004/0170037 (2004-09-01), Bucks et al.
patent: 2009/0273290 (2009-11-01), Ziegenfuss
patent: 2004536434 (2004-12-01), None
patent: 2006210835 (2006-08-01), None
patent: 2007005326 (2007-01-01), None
Japanese Office Action for application No. 2008-130170, issued Aug. 2, 2010.

Affiliated with

Also associated with

Rating

Light emitting diode array driving apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Light emitting diode array driving apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Light emitting diode array driving apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4173646