Organic light-emitting diode displays with reflectors
US10658441B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 27, 2018 |
| Grant date | May 19, 2020 |
| Priority date | — |
| Expiry date | Aug 27, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10K2102/331
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A display may have an array of pixels formed from organic light-emitting diodes and thin-film transistor circuitry. Each pixel may include organic layers interposed between an anode and a cathode. The organic layers may emit out-coupled light that escapes the display and waveguided light that is waveguided within the organic layers. A reflector may be placed at the edge of the organic layers to reflect the waveguided light out of the display. The reflector may be located within a pixel definition layer and may be formed from metal or may be formed from one or more interfaces between high-refractive-index material and low-refractive-index material. The reflector may be formed from an extended portion of the pixel anode. The reflector may be formed from light-reflecting particles that are suspended in the pixel definition layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.