| 摘要 |
PURPOSE:To easily confirm visually the target object by providing the control circuit to control the liquid crystal shutter, the video signal converting circuit to convert the output from the image sensor to the video signal and the monitor. CONSTITUTION:The output signal of a two-dimensional image sensor 22 is inputted to a liquid crystal shutter control circuit 24, and the liquid crystal shutter control circuit 24 sets the output value from the two-dimensional image sensor 22 corresponding to the light with the strong background beforehand as the limit value whether or not the light of a liquid crystal part 8 is transmitted. When the strong background light is made incident, the difference signal is used and action is executed so that the electric potential difference between a special transparent mosaic electrode 5 of the liquid crystal shutter part 8 onto which the strong background light is made incident and a transparent counter electrode 7 can be zero. Thus, while the strong background light is interrupted, a target object 1 can easily be observed by the monitor. |
