Beam-indexing color image-presentation cathode ray tube

摘要

A beam-indexing color image-presentation cathode ray tube comprises color-phosphor stripes arranged in a regular order and differently responsive to impingement by electron beams to produce light of different colors and index-phosphor stripes arranged to have a predetermined geometric relation to the color-phosphor stripes and responsive to impingement by the electron beams to produce index signals, in which the index-phosphor stripes comprises a first index-phosphor stripe, a second index-phosphor stripe and a third index-phosphor stripe, the pitch of the second index-phosphor stripe is three times as large as the pitch of the third index-phosphor stripe, and the first index-phosphor stripe is wider in its width than the second index-phosphor stripe.