OLED device having improved light output
US7594839B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 24, 2006 |
| Grant date | Sep 29, 2009 |
| Priority date | — |
| Expiry date | Sep 1, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10K2102/3026
Abstract
A top-emitting organic light-emitting diode (OLED) device, comprising: a substrate; an OLED comprising a reflective electrode formed on the substrate; one-or-more layers of organic light-emitting material formed over the reflective electrode; and a transparent electrode formed over the one-or-more layers of organic light-emitting material; a light-scattering layer having a rough surface formed over and in contact with the OLED, a cover affixed to the substrate forming a gap between the cover and the light scattering layer; and wherein the gap is a vacuum or the gap is filled with a relatively low-refractive index gas and the light-scattering layer comprises a plurality of relatively high-refractive index light-scattering transparent particles projecting into the gap without contacting the cover and further comprising an adhesive binder in contact with at least some of the light-scattering particles to adhere the light-scattering particles to the OLED.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.