Patent ID: 7830356

Claim:
A surface light source using LEDs, comprising: a substrate having a plurality of divided regions; a plurality of red, green and blue LEDs arranged on each divided region in a predetermined arrangement structure; and a plurality of LED driving units each having red, green and blue LED driving circuits for respectively driving the red, green and blue LEDs, wherein the red, green and blue LEDs, arranged in one divided region, are connected to like-colored LEDs in series, the series connections being connected in parallel with like-colored LED series arranged in at least one other divided region, wherein the parallel connections of the like-colored LEDS in series are connected to corresponding color LED driving circuits, and wherein the predetermined arrangement structure comprises: a first LED array where red, blue, green, and green LEDs are repeatedly arranged in this order; and a second LED array where blue, red, green, and green LEDs are repeatedly arranged in this order, wherein the first LED arrays and the second LED arrays are repeatedly arranged along rows in order to arrange groups of one red LED, one blue LED and two green LEDs along columns.