| 摘要 |
A color cathode ray tube having an electron beam source has a glass panel with a plurality of fluorescent stripes and a plurality of black stripes located between each two adjacent fluorescent stripes. An aperture grill is located between the electron beam source and the glass panel. A plurality of parallel grill tapes are located between an upper part and a lower part of the aperture grill, and a plurality of slits are provided between each two adjacent grill tapes. The inside stress of a center grill tape is expressed by alpha , the length of the grill tape at a center of the aperture grill is expressed by L0, and a grill tape pitch of the aperture grill is expressed by Pag. The inside stress is expressed by the following formula: alpha >(L0/Pag)0.725*(1.329*10-2*L0+5.354)*10-2. The above formula for the inside stress of a center grill tape in a color cathode ray tube having an aperture grill, acts so as to reduce picture quality deterioration generated by a vibration, such as voice output from a speaker.
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