| 摘要 |
PURPOSE:To set a beam repeat period independently from a scroll speed, and to execute an image display without lowering a frame rate. CONSTITUTION:The device is provided with transmitting means 3, 14 for emitting a beam in a prescribed repeat period, a waveform processing circuit 5 for receiving and processing a reflected echo, a CRT 10, and a display control circuit 6 for executing an image scroll in a period being independent from the repeat period. |
