Local seal for encapsulation of electro-optical element on a flexible substrate
US9412977B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 3, 2015 |
| Grant date | Aug 9, 2016 |
| Priority date | — |
| Expiry date | May 3, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10K2102/311
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An electro-optical panel product comprises a collection of distinct light-emitting elements formed on a substrate. The product may be a display or lighting apparatus, and each electro-optical element may be an OLED. Distinct local seals are formed below respective individual electro-optical elements or groups of electro-optical elements. Some embodiments combine a metal foil substrate and glass local seals in a flexible bottom-emitting product. The local seal may be used in conjunction with a continuous thin film encapsulation structure. Optical functions can be provided by each local seal, including refraction, filtering, color shifting, and scattering. Each local seal is formed by depositing a low melting temperature glass powder suspension or paste using inkjet technology in openings formed in a starter substrate; the glass powder is fused using a scanning laser beam having a tailored beam profile. The lower encapsulation substrate incorporating local window seals may be wholly or partially pre-formed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.