| 摘要 |
<p>By selecting the number of apertures in the shadow mask of a colour cathode ray tube system to be such that the s/av ratio, where s is the scan pitch for the entire frame and av is the vertical mask pitch, is between 5.8/8 and 6.4/8 (5.8/8 « s/av « 6.4/8) or between 9.4/8 and 10.6/8 where the lines are progressively scanned or, where the lines are scanned in an interlace mode with a frequency higher than 70 Hz, the s/av ratio is between 5.8/8 and 6.4/8 (5.8/8 « s/av « 6.4/8) or between 9.4/8 and 10.6/8, a cathode ray tube system is provided with a reduced occurrence of disturbing Moiré effects.</p> |
