Communications: electrical – Traffic control indicator
Reexamination Certificate
2006-08-08
2006-08-08
Pham, Toan N. (Department: 2632)
Communications: electrical
Traffic control indicator
C340S815400, C340S815450, C340S815750, C362S609000, C362S245000, C362S296040
Reexamination Certificate
active
07088261
ABSTRACT:
A traffic signal (310) having a reflector (322, 400) having a plurality of reflective surfaces (330, 402) directing incident ambient light received from the signal lens (318) to a photodetector (322). The reflector is disposed proximate and about a plurality of LEDs (324, 406) which are pulse width modulated by an integrated controller (360) to generate light which is also transmitted through the lens. The photodetector senses the incoming ambient light when the LEDs are in the “off” mode. Incident ambient light is focused by a lens to overfill the reflector and LEDs, and the photodetector is positioned within the redirected incident ambient light from the lens.
REFERENCES:
patent: 5132682 (1992-07-01), Higgins et al.
patent: 5309155 (1994-05-01), Hsien et al.
patent: 5633629 (1997-05-01), Hochstein
patent: 5806969 (1998-09-01), Rosengren
patent: 6283613 (2001-09-01), Schaffer
patent: 6323781 (2001-11-01), Hutchison
patent: 6426704 (2002-07-01), Hutchison
patent: 6441750 (2002-08-01), Hutchison
patent: 6450662 (2002-09-01), Hutchison
patent: 6577247 (2003-06-01), Giacaman
Heald Arthur D.
Sharp Frank M.
Zalta Michael J.
Jackson & Walker, LLP
Lailai Capital Corp.
Pham Toan N.
LandOfFree
Traffic signal light having ambient light detection does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Traffic signal light having ambient light detection, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Traffic signal light having ambient light detection will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3623456