| 摘要 |
PURPOSE:To use a video processing device in common for various kinds of endoscopes of different picture-element numbers by providing a drive pulse adjusting circuit to selectively set the frequency of a drive pulse in response to the picture-element number of a solid-state image pickup element mounted at a front tip. CONSTITUTION:At the front tip of the device 11, the solid-state image pickup element 12 is provided, and in the connector part, a frequency divider 13 as a drive pulse adjusting means is provided. The output of the divider 13 is connected to the element 12, and the device 11 is connected to the video processing device 14 via a connector. When the device 14 is turned on, a light source is lighted, and a drive pulse generating circuit 15 starts to oscillate. The drive pulse of a high frequency is supplied to the divider 13 as shown in the figure. The divider 13 has such a frequency dividing ratio as determined corresponding to the picture-element number of the element 12 in relation to the frequency of the drive pulse from the circuit 15. Accordingly, when the drive pulse is supplied from the circuit 15 to the frequency divider 13, the supplied pulse is frequency-divided, and turns to be of the frequency suitable for driving the element 12. |
