Title (en)

LIGHTING DEVICE WITH LIGHT GUIDE HAVING VARIABLE LIGHTING LENGTH ACCORDING TO NEEDS

Title (de)

BELEUCHTUNGSVORRICHTUNG MIT LICHTLEITER VARIABLER LEUCHTLÄNGE GEMÄSS DEN BEDÜRFNISSEN

Title (fr)

DISPOSITIF D'ÉCLAIRAGE À GUIDE DE LUMIÈRE À LONGUEUR D'ÉCLAIRAGE VARIABLE EN FONCTION DES BESOINS

Publication

EP 3857121 B1 20221221 (FR)

Application

EP 19787332 A 20190906

Priority

• FR 1858698 A 20180925
• FR 2019052058 W 20190906

Abstract (en)

[origin: WO2020065162A1] A lighting device (DE) comprises: - a source (SP) generating photons, - a light guide (GL) receiving these photons in a first zone (Z1) in order to guide them to a second zone (Z2) in order for them to participate in a photometric function, and comprising, at a chosen location, a transverse groove (RT) extending over almost all of its thickness and over all of its width in order to subdivide it into two adjacent parts (PG1- PG2), and - an opaque plate (PO), having similar dimensions to the dimensions of the transverse groove (RT), and either housed in the latter (RT) in order to allow lighting by the photons of a portion of the second zone (Z2) belonging to one of the parts (PG1-PG2) of the light guide (GL), or unused in order to allow lighting of the entire second zone (Z2) by the photons.

IPC 8 full level

F21S 43/237 (2018.01); F21S 43/14 (2018.01); F21S 43/239 (2018.01); F21S 43/249 (2018.01); F21S 43/50 (2018.01)

CPC (source: EP)

F21S 43/239 (2017.12); F21S 43/249 (2017.12); F21S 43/50 (2017.12); F21S 43/14 (2017.12); F21S 43/15 (2017.12)

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

DOCDB simple family (publication)

FR 3086368 A1 20200327; FR 3086368 B1 20210416; CN 112752924 A 20210504; CN 112752924 B 20230407; EP 3857121 A1 20210804; EP 3857121 B1 20221221; WO 2020065162 A1 20200402

DOCDB simple family (application)

FR 1858698 A 20180925; CN 201980062576 A 20190906; EP 19787332 A 20190906; FR 2019052058 W 20190906