1
Raymond E Deese, David D Lewis: LED traffic signal light with automatic low-line voltage compensating circuit. R & M Deese, Knobbe Martens Olson & Bear, October 10, 1995: US05457450 (95 worldwide citation)

The present invention relates to an LED traffic signal light containing numerous LEDs and a voltage compensation circuit which allows the traffic light to operate over a wide range of input power voltages, while generating sufficient light intensity to control traffic at a highway intersection. The ...


2
Raymond E Deese, David D Lewis: LED traffic signal light with automatic low-line voltage compensating circuit. Electro Tech s, Knobbe Martens Olson & Bear, September 2, 1997: US05663719 (90 worldwide citation)

The present invention relates to an LED traffic signal light containing numerous LEDs and a voltage compensation circuit which allows the traffic light to operate over a wide range of input power voltages, while generating sufficient light intensity to control traffic at a highway intersection. The ...