| 摘要 |
<p>Display apparatus which includes a cathode ray tube. Electrical signals carrying information indicative of visual images are conveyed to an electrode in the tube and an electron beam is modulated in response to the signal and scans the screen in line and field directions to generate visual images. The line scan causes the beam to move alternately in the forward sweep (display) and flyback directions and the apparatus is arranged to cause the ratio of blanking period to display period to be greater than conventional values, i.e. at least 23.08%. Increasing blanking time and hence available flyback time over conventional values allows display improvement techniques, such as increasing field rate or number of lines per field, to be used without requiring, for example, line output transistors with higher voltage ratings.</p> |
