Task light
US5530628A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 5, 1993 |
| Grant date | Jun 25, 1996 |
| Priority date | — |
| Expiry date | Apr 5, 2013 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21Y2103/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An improved task light is comprised of a housing having a center cavity portion, a light passage opening below the center cavity portion, and an edge cavity for supporting a light source that emits light from the housing's edge cavity portion into its center cavity portion. A reflector, at least a portion of which spans the center cavity portion of the housing and which portion has a proximal and distal edge in relation to the light source, lies along a path that curves inwardly of the housing such that, when the reflector is viewed through the housing's light passage opening from the level of a task surface below the task light and from any position to the front of the task light, the luminance of the spanning portion of the reflector from reflected source light is substantially uniform over substantially the entirety of the spanning portion of the reflector. By maintaining the spanning portion of the reflector at a low luminance level, preferably below approximately 250 footlamberts, the reflector, as an operatively luminous optical element that presents itself to the task area, can be substantially eliminated as a source of reflected glare. In a lens version of the invention, a …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.