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High bay luminaire on TIR base with LED colour effect

IP.com Disclosure Number: IPCOM000126308D
Publication Date: 2005-Jul-13
Document File: 1 page(s) / 27K

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The IP.com Prior Art Database

Abstract

ID689562

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Publication ID689562

High bay luminaire on TIR base with LED colour effect

Typical (hanging) luminaires in high bay and shops are equipped with a so-called TIR reflector (total internal reflection). The material often is transparent PMMA or Polycarbonate without any reflective layer.

The geometry of these reflectors consists of a smooth (polished) inside and a prismatic (polished) outside structure. The light from the source inside this reflector will be transmitted in the transparent material and most of the light will be reflected on the prism flanks by the fact that almost all angles are within TIR. The curvature of the prismatic prism flanks and the position and size of the light source define the outcoming light distribution.

Due to dimensions and position of the light source, a small amount of light will be transmitted through the reflector (which has small imperfections and rounded edges). This 'illuminates' the outside of the reflector, however, without substantial glare. Because of the fact that these reflectors have no reflective layer and consist of one- piece moulded transparent plastic, they can be used to act as light guide for additional sources (LEDs), placed on top (rim) of the reflector, thus creating a hybride luminaire, (see fig.).

The effect will be a scent of coloured light on the outside of the reflector, caused by light extraction through the prism structure.

Another colour effect will be a luminant ring at the lower edge of the reflector,...