| 摘要 |
PROBLEM TO BE SOLVED: To provide a cathode-ray tube device that provides a stable operation for a long time and has excellent resolution. SOLUTION: In the electron gun structure 7, the electron beam generating section includes a cathode K and a plurality of electrodes G1, G2, etc., that are arranged on the fluorescent screen side of the cathode K and have an opening corresponding to the cathode K. The cathode K has an electron emitting region CDN for emitting electrons. The diameter Dcd of the electron emitting region CDN is defined by the hafnium layer Hf provided on the surface of the cathode disk CD and is smaller than the electron beam passing hole diameter Dg1 of the first grid G1 that is arranged opposed to the cathode K.
|
