| 摘要 |
A colour display tube comprising in an evacuated envelope a display screen and an electron gun system comprising first means to generate three electron beams situated in one plane, which first means comprise for each electron beam a cathode, and a first and second electrode which is common for the three electron beams and which has apertures for each electron beam, and second means to generate focussing lens fields for symmetrically focussing the electron beams on the display screen, which second means comprise at least two electrodes which are common for the three electron beams and have apertures for each electron beam.
|
