CATHODE-RAY TUBE IMPROVED IN MOIRE

PROBLEM TO BE SOLVED: To provide a cathode-ray tube to be applied for the HDTV(high- definition television), capable of minimizing the moires, arising from the relation between the scanning line pitch of the electron beam and the vertical pitch of the electron beam in the passing holes of a shadow mask. SOLUTION: The cathode-ray tube includes a panel forming the screen lined with a fluorescent substance, a funnel connected to the panel and provided with a deflection unit around itself, a tube which includes a neck connected to the funnel and accommodating an electron gun inside itself and a shadow mask provided with the number of the electron beam passing holes formed by the prescribed pattern. Ps/Py satisfies the formula [(2i+1)/4]-0.1