EP 0231303 B1 19891004 - FLUORESCENT LAMP FOR UNIPOLAR OPERATION
Title (en)
FLUORESCENT LAMP FOR UNIPOLAR OPERATION
Publication
Application
Priority
DE 3525888 A 19850719
Abstract (en)
[origin: WO8700683A1] To reduce significantly the cataphoresis of a fluorescent lamp for unipolar operation and lower the anode current density the anode of the tube comprises a useful surface for the formation of the electric field of the discharge equal to 60-100% of the maximum cross-sectional area of the discharge enclosure, measured at right angles to the discharge axis. It is advantageous to equip the anode with heat sink conductors in order to achieve a still higher temperature gradient. A continual external heating of the cathode ensures particularly good ignition charateristics and easy brightness regulation. This is of advantage when using the lamp for the reproduction of alphanumeric signs and images, e.g. in a matrix, display or similar device.
IPC 1-7
IPC 8 full level
H01J 61/067 (2006.01); H01J 61/24 (2006.01); H01J 61/32 (2006.01); H01J 61/52 (2006.01); H01J 61/72 (2006.01)
CPC (source: EP KR US)
H01J 61/067 (2013.01 - KR); H01J 61/0672 (2013.01 - EP US); H01J 61/325 (2013.01 - EP US); H01J 61/72 (2013.01 - EP US)
Designated contracting state (EPC)
AT CH DE FR GB IT LI NL
DOCDB simple family (publication)
WO 8700683 A1 19870129; DE 3525888 C1 19870108; DE 3666112 D1 19891109; EP 0231303 A1 19870812; EP 0231303 B1 19891004; JP H0467744 B2 19921029; JP S63500833 A 19880324; KR 880700448 A 19880315; KR 910001418 B1 19910305; US 4814663 A 19890321
DOCDB simple family (application)
EP 8600429 W 19860721; DE 3525888 A 19850719; DE 3666112 T 19860721; EP 86904802 A 19860721; JP 50415986 A 19860721; KR 870700232 A 19870318; US 5329587 A 19870416