Patent ID: 7609241

Claim:
A double-faced light emitting diode display comprising: a pair of shield panels, each shield panel comprising a video contrast enhancement assembly; and a light emitting module located between the shield panels, the light emitting module comprising an opaque insulative substrate with a pair of pixel matrixes provided at two main surfaces thereof and a circuit driving system provided on at least one of the main surfaces, each pixel matrix corresponding to a respective opposite video contrast enhancement assembly and comprising a plurality of pixel units, wherein each of pairs of pixel units is defined as one pixel unit in a row of one of the pixel matrixes and another pixel unit in a same row of the other pixel matrix, and symmetrically opposite pairs of pixel units are electrically interconnected and are electrically connected with the circuit driving system, wherein each pixel unit comprises three light emitting diodes having optical primary colors R (red), G (green) and B (blue) respectively, a common anode electrically connected with each of the three light emitting diodes, and three cathodes electrically connected with the three light emitting diodes respectively; wherein the circuit driving system comprises a row driver and a column driver located at two sides of the at least one of the main surfaces; wherein the row driver is electrically connected with the common anodes of the pixel units in parallel, and the column driver is electrically connected with the cathodes of the pixel units in parallel; wherein the common anodes of each symmetrically opposite pair of pixel units are electrically interconnected; wherein the six cathodes of each symmetrically opposite pair of pixel units are electrically interconnected in three corresponding one-to-one relationships.