Charged powder supply device
US9586216B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 18, 2014 |
| Grant date | Mar 7, 2017 |
| Priority date | — |
| Expiry date | Mar 21, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/0361
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A charged powder supply device is disclosed. A plurality of charged powder particles are disposed on an upper side of a carrier and at least an action source is positioned at a lower side of the carrier for acting on the carrier so as to vibrate the charged powder particles on the upper side of the carrier. As such, the vibrated charged powder particles are attached to objects to be coated, such as LEDs, under the effect of an electric field so as to form a powder layer, such as a phosphor layer. Since there are no other external forces that affect the moving direction of the charged powder particles, the powder layer can be uniformly formed on the objects.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.