Foldable modular light diffusion box
US6588912B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 21, 2000 |
| Grant date | Jul 8, 2003 |
| Priority date | — |
| Expiry date | Feb 18, 2021 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21W2131/406
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A lighting box or front projection light device has a housing with an open front and open rear and a bar or rod extending horizontally across the housing. Multiple stage-type nonfocusable lights such as par lamps are mounted on the bar and positioned to send light out the front of the box. The box also has a diffusion element holder (frame) disposed proximate its front end, and even may have multiple diffusion element holders including having one diffusion element holder at an angle. Each diffusion element holder has a diffusion element or filter. The diffusion element or elements receive the light from the lighting instruments and diffuse it to provide a soft projected light from the box. In accordance with one aspect of the invention, this light may be used to provide diffused light as part of the key lighting for a stage or set, and may provide such soft projected lighting from a front (downstage) of the stage or set.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.