EP 0669788 B1 20000503 - Illumination dimmer system for fluorescent lamps
Title (en)
Illumination dimmer system for fluorescent lamps
Title (de)
Beleuchtungsdimmersystem für Leuchtstofflampen
Title (fr)
Système gradateur de lumière pour lampes fluorescentes
Publication
Application
Priority
JP 4992994 A 19940224
Abstract (en)
[origin: EP0669788A1] An illuminated location is divided up into a plurality of illumination zones for each of which a design illuminance is decided upon taking into account such factors as the use of the zone. Each illumination zone is provided with a plurality of fluorescent lamps, one or more inverters to which the lamps are connected, a photometer for receiving light reflected from objects in the zone, a controller for changing the current values of the inverters, and a setting device. The design illuminance decided is input to the controller for each illumination zone by the setting device. At prescribed time intervals, the controller reads in a change in the output of the photometer and, in dependence upon the change, alters the output current values of all inverters of this illumination zone, whereby the brightness of the illumination zone is corrected so as to be held at the originally set design illuminance. <IMAGE>
IPC 1-7
IPC 8 full level
H04Q 9/00 (2006.01); H05B 37/02 (2006.01); H05B 41/36 (2006.01); H05B 41/392 (2006.01)
CPC (source: EP KR US)
H05B 41/38 (2013.01 - KR); H05B 41/392 (2013.01 - EP); H05B 41/3922 (2013.01 - EP US); H05B 47/17 (2020.01 - EP US)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 0669788 A1 19950830; EP 0669788 B1 20000503; CN 1049319 C 20000209; CN 1110045 A 19951011; DE 69516565 D1 20000608; DE 69516565 T2 20010208; JP 2745379 B2 19980428; JP H07235390 A 19950905; KR 0154652 B1 19981215; KR 950035533 A 19951230; TW 302431 B 19970411
DOCDB simple family (application)
EP 95101639 A 19950207; CN 95100793 A 19950223; DE 69516565 T 19950207; JP 4992994 A 19940224; KR 19950002931 A 19950216; TW 84101408 A 19950216