Patent ID: 7956367

Claim:
A light emitting device having a plurality of GaN-based light emitting diode elements formed on a single insulating substrate, wherein the plurality of light emitting diode elements are arranged in a two-dimensional pattern on the insulating substrate; the plurality of light emitting diode elements are grouped into a first group and a second group of equal number, the first and second groups being connected between two electrodes for AC power supply in parallel so that the first group and the second group are of opposite polarities, and each of the first group and the second group of light emitting diode elements being placed in a zigzag pattern; and a negative electrode of one of the light emitting diode elements of the first group other than the light emitting diode element at the end of the first group is shared as and is electrically connected to a negative electrode of one of the light emitting diode elements of the second group, wherein each of the plurality of light emitting diode elements has a planar shape of an approximate triangle, and wherein the one of the light emitting diode elements of the first group and the one of the light emitting diode elements of the second group are placed in such a manner that the two light emitting diode elements as a whole have an approximate square shape and share a negative electrode at opposing sides.