AC driven LED device

An AC driven LED device includes a light emitting circuit, a switching LED module and a control module. The light emitting circuit includes a plurality of LED luminous lamp strings, wherein a switch component is coupled between every two of them. The switching LED module includes a plurality of switching components and a plurality LED conducting lamp strings connected in series. The LED conducting lamp strings are serially connected to the front end of the LED luminous lamp strings. The control module receives an AC power having an AC cycle and generates a pulse driving signal for driving each switch component. The control module is further built-in with program logic for dividing several intervals based upon the AC cycle so as to control whether to conduct each switching component or not at different intervals, thereby determining the conducted number of LED conducting lamp strings. With the conducted number of LED conducting lamp strings, additional voltage on each switch component can be absorbed to increa