| abstract |
An array of electronic devices has an improved contrast ratio by lowering background luminescence from ambient radiation source(s). Background luminescence may be lowered by using a black lattice by itself of in combination with a black layer used between openings in the black lattice. The black lattice, black layer, or both may be achieved by using a high absorbance material, a low reflectivity layer, or a combination of the two. The low reflectivity layer may be designed by optimizing the thickness or materials at the interfaces of the layer to reduce reflectivity. A combination of the black lattice and a black layer within at least one set of the electrodes may provide very low background luminescence while still maintaining a good ratio of ON luminescence versus OFF luminescence. |