| 摘要 |
PURPOSE:To prevent the false operation at the time correction by indicating the state of correction of digital display time or correction of analog display time. CONSTITUTION:When the Q' output of an FF23 is set at ''1'' by the operation of a switch S3, gates 20, 21 go on, and the correction mode of digital display time is set. Correcting digits are selected by the operation of S1, and the contents of the selected digits are advanced stepwise by the operation of S2, whereby the display time is corrected. Next, when the output state of the FF23 is inverted by the operation of the S3, a gate 24 goes on, and the correction mode of analog display time is set. When the S2 is operated, the signal (b) of 64Hz from the gate 24 is applied to a driving circuit 8, by which a rotor 18 is driven stepwise, and the minute hand is fast fed. At this time, the Q output of the FF23 is apolied to a hand mark display body 25, whereby lighting display is accomplished. |
