LED device having improved light output
US7893612B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 27, 2008 |
| Grant date | Feb 22, 2011 |
| Priority date | — |
| Expiry date | Jul 30, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10K59/38
Abstract
A light-emitting diode device that includes a first group of sub-pixels each subpixel comprising a reflective electrode and a second electrode formed over a substrate with an unpatterned light-emitting layer formed between the reflective electrode and the second electrode, thus forming a first optical cavity having a first cavity length. Either the reflective or second electrode is patterned to form two or more independently-controllable, light-emitting sub-pixels. A second group of sub-pixels, each comprising a reflective electrode and a second electrode formed over the substrate. An unpatterned light-emitting layer is formed between the reflective electrode and the second electrode to comprise a second optical cavity having a second cavity length different from the first cavity length of the first optical cavity. Either the reflective or second electrode is patterned to form one or more independently-controllable, light-emitting sub-pixels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.