| 摘要 |
PURPOSE:To increase the speed of correcting operation, by making it possible to supply a correction pulse signal to the clock circuit corresponding to the lowermost rank figure of a time display part held between two simultaneously operated touch switches and supplying a figure-up signal to the clock circuit corresponding to the other figure. CONSTITUTION:In timing the signal of a frequency divider 50 by counters 52, 54, 56, 58 and displaying the same on the figure display parts 24, 26, 28, 30 of a liquid crystal display part 22 through a decoder driver 76, display correction switches 36, 38, 40, 42, 44 and a mode change-over switch 46 are provided to cover glass 34 so as to correspond to the display parts 24, 26, 28, 30, 32 and correction circuits 62, 64, 66, 68 are provided between the counters 52-58. The signal of a circuit 78 detecting the operation of the switch 46 is sent to the circuit 62 through a lock circuit 80 and, for example, when two switches 40, 44 are simultaneously operated, figure-up is prohibited to correct the display part 30 and figure-up is enabled by the simultaneous operation of the switches 38, 44 to correct the display part 30. |
