Luminaires having aperture-modifying structures for producing visually smooth light distributions
US6942364B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 2, 2003 |
| Grant date | Sep 13, 2005 |
| Priority date | — |
| Expiry date | May 13, 2023 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21Y2103/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Luminaires particularly useful for ceiling mounting in either recessed or surface-mounted applications and intended for “washing” light over an adjacent wall, the “wall wash” luminaires of the invention are configured in preferred embodiments for operation with elongated lamping and particularly tubular fluorescent lamping including T5 lamps. The present luminaires are usually provided with elongated and other apertures, certain of which are often referred to as “small” apertures, conformed by shaping of at least one elongated edge thereof to minimize alternating relatively light and dark striations on adjacent walls. Luminaires according to the invention having relatively narrow elongated apertures function to transition abrupt changes in luminance imaged onto an adjacent wall by alteration of aperture opening, such as by an extension of structure from one elongated edge of such an aperture, thereby to produce a more smooth vertical light distribution over the wall.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.