The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 24, 2017
Filed:
Oct. 15, 2014
Philips Lighting Holding B.v., Eindhoven, NL;
Fetze Pijlman, Eindhoven, NL;
Floris Maria Hermansz Crompvoets, Bunde, NL;
Arno Vredenborg, Utrecht, NL;
Robert Van Asselt, Valkenswaard, NL;
Maarten Van Lierop, 'S-Hertogenbosch, NL;
Peter Tjin Sjoe Kong Tsang, Eindhoven, NL;
Hendrik Jan Eggink, Eindhoven, NL;
PHILIPS LIGHTING HOLDING B.V., Eindhoven, NL;
Abstract
A lighting unit comprising a tapering cavity surrounded by a circumferential reflective wall and extending between a light emission window and a light entrance surface where a light source is (to be) mounted. An optical plate having a light outcoupling structure is provided at the light emission window for redirecting and issuing light as a uniform lighting unit light beam. Said uniform lighting unit light beam has a first beam emission angle β in a first direction and optionally, for example for a rectangular shaped light emission window, a second beam emission angle γ in a second direction transverse to the first direction. The tapering cavity having a first cut-off angle α in said first direction, wherein β=α+2*δ with 0°<δ<=10°, and optionally a second cut-off angles ε in the second direction transverse to the first direction wherein γ=ε+Θ with 0°<=Θ<=10°.