| 摘要 |
<p>The image screen device has a horizontal deflection circuit providing a deflection current for a horizontal deflection coil, for symmetrical deflection of the electron beam, with a memory for temporary storage of the displayed signal, coupled to a memory control circuit. The latter includes a read clock generator (4) providing a read clock with a period duration which is variable within each line duration. A variable amplifier (3) provides a cathode beam current which is reduced in dependence on a reduction in the horizontal velocity of the electron beam during its movement across the screen for each line.</p> |
