Patent ID: 7102538
Filing Date: 2006-09-05
Classification: G08G

Abstract:
1. An LED traffic signal light device, comprising: a light display housing having a pair of concentric circular portions wherein an annular illuminating area is created between said pair of concentric circular portions; a central processing unit consisting of a microprocessor, a memory and an interface circuit disposed within said light display housing and for controlling the operation of the whole device and outputting a signal and receiving a command via an output and input interface; a control panel being a printed circuit board and recording a circuit and relevant parameters therein in advance; an LED signal light consisting of plural LEDs which actively show a light display in a closed circuit and show various colors accompanying with various arrangements into abstract symbols for indicating various traffic situations; said output and input interface provided for said central processing unit to output a signal or receive an external command signal through said interface; and an adapter provided for converting an AC to a DC and stabilizing the current provided to the whole device, and wherein the illuminated length of the annular area between said pair of concentric circles becomes shorter in a counter clockwise direction as the LED traffic signal device is changing from displaying one traffic signal to another.