Light discharge tube - has two electrodes parallel to length of transparent tube, one inside and one outside tube

摘要

The appts. consists of a transparent discharge tube (10) containing a discharge gas and having two electrodes (11,12). The electrodes are arranged parallel to each other along the tube one (11) inside the tube and the other (12) outside. The outer electrode may be U=shaped. It may also consist of a layer of electrically conducting material deposited on the tube outer surface. ADVANTAGE - Has lower discharge stopping voltage and more uniform light density.