Electric lamp and discharge devices: systems – With signal – indicator – or alarm – Electrically operated switch controlling the signal circuit
Reexamination Certificate
2011-07-12
2011-07-12
Barnie, Rexford N (Department: 2819)
Electric lamp and discharge devices: systems
With signal, indicator, or alarm
Electrically operated switch controlling the signal circuit
C315S291000, C315S308000
Reexamination Certificate
active
07977887
ABSTRACT:
An LED drive apparatus includes a microprocessor having a configurable input/output port, a FET current control transistor, and a diagnostic interface circuit. The diagnostic interface circuit includes a transistor having an input coupled to a junction between the FET and the LED, and an output coupled to an input of the FET. The microprocessor input/output port is coupled to the input of the FET for turning the LED ON and OFF and performing fault protection and diagnostics. At each desired transition of the LED, the microprocessor configures its input/output port as an output and momentarily sets the output state to achieve the desired transition, then re-configures the input/output port to determine the conduction state of the diagnostic interface circuit transistor, and determines an output fault status of the drive apparatus based on the determined conduction state.
REFERENCES:
patent: 5001398 (1991-03-01), Dunn
patent: 5877596 (1999-03-01), Allison
patent: 6320330 (2001-11-01), Haavisto et al.
patent: 6492781 (2002-12-01), Palmer et al.
patent: 6856098 (2005-02-01), Piaskowski
patent: 6864641 (2005-03-01), Dygert
patent: 6979959 (2005-12-01), Henry
patent: 7049767 (2006-05-01), Wilhelm
patent: 7119498 (2006-10-01), Baldwin et al.
patent: 7265504 (2007-09-01), Grant
patent: 7541785 (2009-06-01), Murakami
patent: 7830099 (2010-11-01), Ger et al.
patent: 7855515 (2010-12-01), Huang et al.
patent: 7888890 (2011-02-01), Joos et al.
patent: 2003/0025464 (2003-02-01), Konopka
patent: 2003/0062850 (2003-04-01), Konopka et al.
patent: 2003/0151378 (2003-08-01), Busse et al.
patent: 2004/0021429 (2004-02-01), Shackle
patent: 2004/0032222 (2004-02-01), Green
patent: 2004/0164685 (2004-08-01), Dygert
patent: 2004/0183477 (2004-09-01), Newman et al.
patent: 2005/0007037 (2005-01-01), Ribarich
patent: 2005/0077838 (2005-04-01), Blumel
patent: 2005/0093461 (2005-05-01), Cull et al.
patent: 2005/0140315 (2005-06-01), Baldwin et al.
patent: 2005/0146290 (2005-07-01), Gray
patent: 2006/0033456 (2006-02-01), Tsai et al.
patent: 2006/0087260 (2006-04-01), Herzer et al.
patent: 2006/0158131 (2006-07-01), Mitsuyasu et al.
patent: 2006/0220571 (2006-10-01), Howell et al.
patent: 2006/0261748 (2006-11-01), Nukisato et al.
patent: 2007/0120506 (2007-05-01), Grant
patent: 2007/0159117 (2007-07-01), Chen et al.
patent: 2008/0018268 (2008-01-01), Green
patent: 2008/0054824 (2008-03-01), Ribarich
patent: 2008/0061713 (2008-03-01), Zeng
patent: 2008/0080105 (2008-04-01), Blaha et al.
patent: 2008/0088260 (2008-04-01), Hsu et al.
patent: 2008/0211426 (2008-09-01), Kuo et al.
patent: 2008/0278085 (2008-11-01), Yu et al.
patent: 2008/0297065 (2008-12-01), Mubaslat et al.
European Search Report dated Dec. 1, 2010.
Barnie Rexford N
Delphi Technologies Inc.
Funke Jimmy L.
Tabler Matthew C
LandOfFree
Low leakage current LED drive apparatus with fault... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Low leakage current LED drive apparatus with fault..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Low leakage current LED drive apparatus with fault... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2702383