Apparatus for producing an optical effect or for simulating fires and simulated fireplaces including such apparatus
US7651230B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 13, 2005 |
| Grant date | Jan 26, 2010 |
| Priority date | — |
| Expiry date | Oct 27, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S362/81
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Apparatus for producing an optical effect includes a screen comprising at least one electroluminescent material and associated electrodes for exciting the electroluminescent material to emit light. The electrodes are locally excitable so that the regions of the electroluminescent material generally in the shape of flames may be excited. In an alternative form, or additionally, the screen comprises a material of variable opacity such as a liquid crystal polymer or a suspended particle device gain, electrodes are locally excitable to locally change the opacity of the screen. The screen is locally illuminated to provide the impression of flames.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.