EP 0342607 A2 19891123 - Rare gas cold cathode discharge tube and image input unit using same.
Title (en)
Rare gas cold cathode discharge tube and image input unit using same.
Title (de)
Edelgaskaltkathodenentladungsrohr und Bildeingabevorrichtung unter Verwendung derselben.
Title (fr)
Tube à décharge à gaz rare à cathode froide et unité de prise d'images utilisant un tel tube.
Publication
Application
Priority
- JP 6502989 A 19890317
- JP 11870488 A 19880516
Abstract (en)
A rare gas cold cathode discharge tube (1) is provided with a conductive member (15) nearby a main electrode (13-a), allowing to stabilize the quantity of emitted light even when an intermittent lighting with a period of several milliseconds is carried out. The use of such rare gas cold cathode discharge tube as lighting apparatus allows an image input unit to be realized which is moderate in cost and less space-consuming, still ensuring a color correction function to enhance the color reproducibility of a printing output of the read image and a light adjusting function of the lighting apparatus to enhance the S/N ratio of the read image.
IPC 1-7
IPC 8 full level
H01J 61/54 (2006.01); H01J 61/56 (2006.01); H04N 1/04 (2006.01)
CPC (source: EP)
H01J 61/544 (2013.01); H01J 61/56 (2013.01)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0342607 A2 19891123; EP 0342607 A3 19910403; EP 0342607 B1 19950802; DE 68923651 D1 19950907; DE 68923651 T2 19960222; HK 5297 A 19970117; JP H0249345 A 19900219
DOCDB simple family (application)
EP 89108780 A 19890516; DE 68923651 T 19890516; HK 5297 A 19970109; JP 6502989 A 19890317