Drive circuit for an LED array

Details Drive circuit for an LED array Drive circuit for an LED array

2005-03-08

2005-03-08

Shankar, Vijay (Department: 2673)

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

Reexamination Certificate

active

06864867

ABSTRACT:
A drive circuit for an LED array comprises a first LED cluster and at least one second LED cluster. A control loop is designed to drive a switch of the first LED cluster so as to achieve a constant mean value of the current (ILED) flowing through the first LED cluster the control loop being designed for also driving switches of the further LED clusters. The drive circuit also comprises a total current detection device (RMES) with the aid of which it is possible to determine an actual magnitude (UMess) which corresponds to the sum of the currents through at least two of the second LED cluster. A comparison unit compares the actual magnitude (UMess) with a predefinable desired magnitude (UOL)

REFERENCES:
patent: 4706130 (1987-11-01), Yamakawa
patent: 5309151 (1994-05-01), Aoki
patent: 5453663 (1995-09-01), Nakayama
patent: 5634711 (1997-06-01), Kennedy et al.
patent: 5936599 (1999-08-01), Reymond
patent: 6153985 (2000-11-01), Grossman
patent: 6400101 (2002-06-01), Biebl et al.
patent: 6433483 (2002-08-01), Michael et al.
patent: 6515434 (2003-02-01), Biebl
patent: 6535235 (2003-03-01), Nagumo
patent: 6636003 (2003-10-01), Rahm et al.
patent: 20010038268 (2001-11-01), Fuchsberger et al.
patent: 19734750 (1999-02-01), None
patent: 19749333 (1999-03-01), None
patent: 19930174 (2001-01-01), None
patent: 19550135 (2001-04-01), None

Affiliated with

Also associated with

Rating

Drive circuit for an LED array does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3435372