Communications: electrical – Land vehicle alarms or indicators – Of relative distance from an obstacle
Reexamination Certificate
2005-08-09
2005-08-09
Hofsass, Jeffery (Department: 2636)
Communications: electrical
Land vehicle alarms or indicators
Of relative distance from an obstacle
C340S436000, C340S903000, C340S901000, C701S036000, C701S045000, C280S727000
Reexamination Certificate
active
06927677
ABSTRACT:
A blind spot detector system adapted to the exterior of a vehicle comprising at least one infrared light emitting diode (LED), an infrared photodetector and demodulator, and a microcontroller. The output power of the infrared transmitter is linearly modulated, enabling the blind spot detector to determine the proximity of the detected object. Furthermore, the transmitter output is frequency modulated to screen out random infrared radiation that might adversely affect the operation of the infrared photodetector. The system is calibrated to the position of the attached vehicle by linearly increasing the output power of the transmitter until the rear quadrant of the vehicle is detected when the transmitter is outputting power at a pre-determined calibration level. During normal operation, an object detected while the transmitted power is greater than a predetermined lower threshold and less than the calibration level will activate a LED indicator on the system housing.
REFERENCES:
patent: 4694295 (1987-09-01), Miller et al.
patent: 4872051 (1989-10-01), Dye
patent: 5173881 (1992-12-01), Sindle
patent: 5325096 (1994-06-01), Paskett
patent: 5463384 (1995-10-01), Juds
patent: 5574426 (1996-11-01), Shisgal et al.
patent: 5719580 (1998-02-01), Core
patent: 5734336 (1998-03-01), Smithline
patent: 5929786 (1999-07-01), Schofield et al.
patent: 5982278 (1999-11-01), Cuvelier
patent: 6184782 (2001-02-01), Oda et al.
patent: 6193380 (2001-02-01), Jacobs
patent: 6198409 (2001-03-01), Schofield et al.
patent: 6388566 (2002-05-01), Perio et al.
patent: 6734807 (2004-05-01), King
patent: 3943431 (1991-07-01), None
patent: 2698449 (1994-05-01), None
patent: WO 95/25322 (1995-09-01), None
Anderson Darryll
Cernasov Andrei
Hofsass Jeffery
Litman Richard C.
Previl Daniel
LandOfFree
Blind spot detector system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Blind spot detector system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Blind spot detector system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3523669