Patent ID: 8339050

Claim:
An AC driven light emitting device comprising: a plurality of first LEDs, each having a first polarity and a second polarity, linearly connected by (n) number of first middle junction points, in which the same polarities of adjacent first LEDs are connected each other, where n denotes an integer satisfying n>2; a plurality of second LEDs, each having a first polarity and a second polarity, linearly connected by (n) number of second middle junction points, in which the same polarities of adjacent second LEDs are connected each other; a first junction point in which different polarities of a first LED of the plurality of first LEDs and a first LED of the plurality of second LEDs are connected each other; a second junction point in which different polarities of a last LED of the plurality of first LEDs and a last LED of the plurality of second LEDs are connected each other; and a plurality of third LEDs, each having a first polarity and a second polarity, connected between the first and second middle junction points in the same order such that the associated polarities of the plurality of third LEDs are connected to the first and second middle junction points having the different polarities, wherein upon applying an alternating voltage between the first and second junction points, the first and second LEDs are driven in a half cycle of the alternating voltage and the third LEDs are driven in an entire cycle of the alternating voltage.