| 摘要 |
PURPOSE:To reduce the power consumption, by performing the illumination and distinguishment of time display unit through the detection of the elasped time specified. CONSTITUTION:After clearing the display at present time of the liquid crystal display unit 7 through the operation of clear key, the distinguishing or illumination time is temporarily stored in the entry register 15 by operating the entry key 11 and the time key 14. Next, by operating the distinguishing time set key 12 or illumination time set key 13, the content of the entry register 15 is input to the distinguishing time register 17 or illumination time register 18. When the present time of the clock counter 3 and the distinguishing time register 17, and illumination time register 18 are in agreement 5 for the content, the flip flop 19 is set, reset with the agreement signal, and the display control circuit 4 and timing control circuit 8 are controlled for illumination, distinguishing of the liquid crystal display unit 7. |
