Patent Number: 6,310,438

Title: Electron tube device mounted with a cold cathode and a method of impressing voltages on electrodes of the electron tube device

Abstract: Expressing a perveance of an electron gun to be determined by a form of the electron gun as, a voltage to be impressed on an accelerating electrode Va and a beam current Ib, voltage Va which satisfies the following expression, is impressed on the accelerating electrode. Further the electric potential of the accelerating electrode is maintained at the highest level of all electrodes in the electron tube at all times.

Inventors: Tsuida; Shunji (Tokyo, JP), Imura; Hironori (Tokyo, JP), Makishima; Hideo (Tokyo, JP)

Assignee: NEC Corporation

International Classification: H01J 25/34 (20060101); H01J 23/02 (20060101); H01J 25/00 (20060101); H01J 23/06 (20060101); H01J 3/02 (20060101); H01J 3/00 (20060101); H01J 025/34 (); H01J 023/04 ()

Expiration Date: 10/30/2018