| 摘要 |
<p>The present invention relates to a position detection device having a function of an electronic shutter. The position detection device is devised to perform the following: a light sending means sends out emitted light, which comes from a light emitting means, to a target object; a two-dimensional light receiving means receives reflected light coming from the target object, and converts the reflected light into an electric charge; and an arithmetic processing means determines a position of the target object on the basis of a light receiving signal from the two-dimensional light receiving means. In addition, the two-dimensional light receiving means has a function of an electronic shutter for discharging an accumulated electric charge in order to adjust the quantity of received light. Moreover, the arithmetic processing means can drive the light emitting means within a period of time during which the electronic shutter is stopped and the two-dimensional light receiving means is accumulating an electric charge. <IMAGE></p> |
