Patent ID: 8237380

Claim:
A method of arranging light emitting diodes (LEDs), supplied by an AC power with low loss and smooth illumination in a high expandable structure, comprising: building up a virtual grid having M virtual lateral lines and N virtual vertical lines, which form multiple virtual intersection nodes at the intersection of the M virtual lateral line and the N virtual vertical line; disposing N−1 lateral LEDs of the LEDs in each virtual lateral line except the first and the last virtual vertical lines with one lateral LED placed between two adjacent virtual intersection nodes, connecting the positive terminal of one lateral LED to the positive terminal of one of the two adjacent lateral LEDs, and connecting the negative terminal of the one lateral LED to the negative terminal of the other adjacent lateral LED; disposing M−1 vertical LEDs of the LEDs in each virtual vertical line except the first and last virtual vertical lines with one vertical LED placed between two adjacent virtual intersection nodes, connecting the positive terminal of one vertical LED to the positive terminal of one of the two adjacent vertical LEDs, and connecting the negative terminal of the one vertical LED to the negative terminal of the other adjacent vertical LED; and connecting the AC power to the first and last virtual vertical lines.