EP 2677387 A1 20131225 - Traffic light luminaire with colour stabilization
Title (en)
Traffic light luminaire with colour stabilization
Title (de)
Ampelleuchte mit Farbstabilisierung
Title (fr)
Feu de circulation avec stabilisation de la couleur
Publication
Application
Priority
EP 12172424 A 20120618
Abstract (en)
A traffic light luminaire (11; 31; 51, 52), in particular a railway traffic light luminaire, with - a plurality of solid state light sources (12a-12e; 32a-32e), comprising a plurality of types (13-15; 33-35) of solid state light sources having different colours of emitted light, - at least one light detector (16, 17; 36-41), and - a control device (18; 42), is characterized in that for a mixed operation mode, the control device (18; 42) is adapted to simultaneously operate at least two of said solid state light sources (12a-12e; 32a-32e), comprising at least two of said types (13-15; 33-35), such that a mixed colour light (19; 43) is generated, wherein the control device (18; 42) is adapted to maintain a luminous intensity of the solid state light sources (12a-12e; 32a-32e) of each of said at least two types (13-15; 33-35), as determined by means of the at least one light detector (16, 17; 36-41), at a predetermined intensity level for said type. The invention presents a traffic light luminaire, based on solid state light sources, which makes a broader range of colours available and allows keeping a selected color, corresponding to a particular signal state to be indicated, and its luminous intensity in a reliable way.
IPC 8 full level
G05D 25/02 (2006.01); H05B 44/00 (2022.01)
CPC (source: EP)
B61L 5/1881 (2013.01); H05B 45/22 (2020.01); B61L 2207/02 (2013.01)
Citation (applicant)
- WO 2011086027 A1 20110721 - SIEMENS AG [DE], et al
- WO 0037904 A1 20000629 - KONINKL PHILIPS ELECTRONICS NV [NL]
- US 7950832 B2 20110531 - TANAKA KENICHIRO [JP], et al
Citation (search report)
- [X] US 2008251690 A1 20081016 - KEIPER OLIVER [DE], et al
- [X] WO 2011098334 A1 20110818 - OSRAM GMBH [DE], et al
- [XD] WO 0037904 A1 20000629 - KONINKL PHILIPS ELECTRONICS NV [NL]
- [X] DE 102007036978 A1 20090212 - TRIDONICATCO GMBH & CO KG [AT]
- [XD] US 7950832 B2 20110531 - TANAKA KENICHIRO [JP], et al
- [XD] WO 2011086027 A1 20110721 - SIEMENS AG [DE], et al
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
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
DOCDB simple family (application)
EP 12172424 A 20120618