| 摘要 |
<p>An electronic flash device employs a flash discharge tube X powered directly from a flat multicelled battery E. An automatic illumination control circuit 3 effects photoelectric conversion and integration of the light reflected from a pictorial object. When the integral reaches a predetermined value the control circuit 3 provides an illumination stop signal to terminate the illumination. A timer circuit 4 also provides an illumination stop signal after the expiration of a given time. The illumination from the flash discharge tube X is thence terminated in response to a stop signal from either the automatic illumination control circuit 3 or from the timer circuit 4, whichever occurs first. <IMAGE></p> |
