| 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. |