EP 1708549 B1 20080507 - Ballast with dimming device
Title (en)
Ballast with dimming device
Title (de)
Vorschaltgerät mit einer Dimmvorrichtung
Title (fr)
Ballast avec dispositif de gradation
Publication
Application
Priority
DE 102005013308 A 20050322
Abstract (en)
[origin: EP1708549A2] The ballast has a dimming device to operate a low pressure discharge lamp by lamp current pulses spaced apart from one another. The device controls the brightness of the lamp in a higher brightness range by adjusting the amplitude of the lamp current generated by an inverter. The device controls brightness in a lower brightness range by adjusting pulse-duty factors between pulse duration and interpulse intervals of the current. Independent claims are also included for the following: (1) a low pressure discharge lamp comprising an electronic ballast (2) a method for controlling brightness of a low pressure discharge lamp.
IPC 8 full level
H05B 41/392 (2006.01)
CPC (source: EP US)
H05B 41/3921 (2013.01 - EP US); Y10S 315/04 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB HU IT
DOCDB simple family (publication)
EP 1708549 A2 20061004; EP 1708549 A3 20070425; EP 1708549 B1 20080507; CN 1849031 A 20061018; CN 1849031 B 20101208; DE 102005013308 A1 20060928; DE 502006000720 D1 20080619; US 2006214601 A1 20060928; US 7330001 B2 20080212
DOCDB simple family (application)
EP 06004877 A 20060309; CN 200610082055 A 20060322; DE 102005013308 A 20050322; DE 502006000720 T 20060309; US 37641306 A 20060315