Abstract: An array of light emitting diodes coupled between a substrate and a transparent electrode include a pair of equipotential bus bars supplying electrical current simultaneously to at least two light emitting diodes, each located in its own area of transparent conductive material. In accordance with another aspect of the invention, a linear array of light emitting diodes has an electrode that includes a conductive island for each light emitting diode and a bus bar interconnecting and surrounding the conductive islands.

Abstract: In an array of LEDs coupled between a transparent substrate and an electrode, a light emitting surface of each LED is in electrical contact with a region of acicular ITO. By contacting the light emitting surface of the die, the acicular ITO also provides light scattering. The contact regions are interconnected to form the array. The acicular ITO acts as a ballast resistance for each die and the resistance can be trimmed for more uniform current among the LEDs. Because each LED is individually ballasted, the LEDs in an array can be driven in any pattern or all simultaneously at a consistent brightness.