Patent ID: 8040050

Claim:
An alternating current (AC) driven light emitting device comprising: a substrate; K number of first light emitting diode (LED) cells arranged in a row on a top surface of the substrate, where K is an integer satisfying K≧3; K number of second LED cells arranged in a row parallel to the row of the first LED cells on the top surface of the substrate; and (K−1) number of third LED cells arranged in a row between the respective rows of the first and second LED cells on the top surface of the substrate, wherein a first electrode of the m th third LED cell is connected with second electrodes of the m th and m+1 th first LED cells, and a second electrode of the m th third LED cell is connected with first electrodes of the m th and m+1 th second LED cells, where m is an odd number satisfying m<K, a first electrode of the n th third LED cell is connected with second electrodes of the n th and n+1 th second LED cells, and a second electrode of the n th third LED cell is connected with first electrodes of the n th and n+1 th first LED cells, where n is an even number satisfying n<K, and the AC driven light emitting device further comprises: a first external electrode connected with a first electrode of a first one of the first LED cells and a second electrode of a first one of the second LED cells; and a second external electrode connected with electrodes among electrodes of the K th first and second LED cells, which are not in connection with the third LED cell.