EP 1316242 A1 20030604 - CONSTANT OUTPUT SOLID STATE LIGHT SOURCE WITH ELECTRONICALLY FILTERED OPTICAL FEEDBACK
Title (en)
CONSTANT OUTPUT SOLID STATE LIGHT SOURCE WITH ELECTRONICALLY FILTERED OPTICAL FEEDBACK
Title (de)
LICHTQUELLE MIT KONSTANTER LEISTUNG MIT ELEKTRONISCH GEFILTERTER OPTISCHER RÜCKKOPPLUNG
Title (fr)
SOURCE LUMINEUSE ELECTRONIQUE A SORTIE CONSTANTE ET CONTRE-REACTION OPTIQUE FILTREE ELECTRONIQUEMENT
Publication
Application
Priority
- US 0126915 W 20010829
- US 65058800 A 20000830
Abstract (en)
[origin: WO0219777A1] A solid state traffic light apparatus provided with an optical feedback sensor ensuring a constant light intensity by detecting back-scattered light from a diffuser centered above an LED array. Control logic individually drives the LEDs, the drive characteristics being changed over time by the optical feedback to ensure a uniform beam intensity is generated at a intensity meeting DOT standards, across the life of the device, and as a function of ambient light conditions.
IPC 1-7
CPC (source: EP US)
H05B 45/12 (2020.01 - EP US); H05B 45/40 (2020.01 - EP US)
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
WO 0219777 A1 20020307; AT E282939 T1 20041215; AU 8689301 A 20020313; DE 60107269 D1 20041223; EP 1316242 A1 20030604; EP 1316242 B1 20041117
DOCDB simple family (application)
US 0126915 W 20010829; AT 01966371 T 20010829; AU 8689301 A 20010829; DE 60107269 T 20010829; EP 01966371 A 20010829