Patent ID: 7646146
Filing Date: 2010-01-12
Classification: H01L

Abstract:
1. An organic light-emitting diode (OLED) device, comprising: a substrate and a cover located over the substrate through which light is emitted; a first reflective electrode formed over the substrate, one or more organic light-emitting layers formed over the first reflective electrode, a second transparent electrode formed over the one or more organic light-emitting layers; a contrast enhancement element having a planar transparent film with a planar light-absorbing layer and a planar light-reflecting layer and wherein the planar transparent film is located on a side of the second transparent electrode opposite the organic layer and has a geometric area for controlling ambient light contrast ratio of the OLED device; and wherein the planar transparent film has a patterned planar light-reflecting layer and a corresponding planar light-absorbing layer formed over the patterned planar light-reflecting layer on the same side of the planar transparent film, wherein the patterned planar light-reflecting layer is located between the planar light-absorbing layer and the second transparent electrode and wherein the patterned planar light-reflecting layer and the planar light-absorbing layer define one or more transparent openings though the patterned planar light-emitting organic layer passes through the transparent openings of the planar transparent film; and a scattering layer, wherein the one or more transparent openings in the contrast enhancement element form a low-index element having a refractive index lower than the refractive index range of the organic layers and of the cover, and wherein the low-index element is between the scattering layer and the cover.