Electronic timepiece, method of display control, and storage medium

A method of display control performed by an electronic timepiece that includes:

• a clock unit that keeps time, the clock unit repeatedly and periodically generating a ticking event at a prescribed ticking timing, the prescribed ticking timing being adjustable so as to correct the time kept by the clock unit;
• a first processor that controls the clock unit;
• a clock generation circuit that outputs a clock signal of a prescribed frequency in accordance with every ticking timing of the clock unit;
• a timer circuit that repeatedly counts pulses in the clock signal output from the clock generation circuit up to a prescribed number of pulses that corresponds to the prescribed frequency;
• a liquid crystal driver circuit that drives a liquid crystal panel;
• and
• a second processor that controls the timer circuit and the liquid crystal driver circuit,
• the method comprising:
• via the second processor, causing the liquid crystal driver circuit to invert a polarity of an AC voltage to be applied to the liquid crystal panel and apply the inverted AC voltages to the liquid crystal panel each time the timer circuit counts up the prescribed number of pulses in the clock signal;
• when the ticking timing of the clock unit is adjusted and changed, causing the first processor to output a synchronization request signal to the second processor at a next ticking timing of the clock unit that occurs after the change in the ticking timing, so as to request the second processor to perform resynchronization;
• and
• causing the second processor, upon receipt of the synchronization request signal from the first processor, to reset the timer circuit so that the timer circuit starts a new count of pulses in the clock signal.

A computer-readable non-transitory storage medium having stored a program executable by an electronic timepiece that includes:

• a clock unit that keeps time, the clock unit repeatedly and periodically generating a ticking event at a prescribed ticking timing, the prescribed ticking timing being adjustable so as to correct the time kept by the clock unit;
• a first processor that controls the clock unit;
• a clock generation circuit that outputs a clock signal of a prescribed frequency in accordance with every ticking timing of the clock unit;
• a timer circuit that repeatedly counts pulses in the clock signal output from the clock generation circuit up to a prescribed number of pulses that corresponds to the prescribed frequency;
• a liquid crystal driver circuit that drives a liquid crystal panel;
• and
• a second processor that controls the timer circuit and the liquid crystal driver circuit,
• the program being configured to cause the electronic timepiece to perform the following:
• via the second processor, causing the liquid crystal driver circuit to invert a polarity of an AC voltage to be applied to the liquid crystal panel and apply the inverted AC voltages to the liquid crystal panel each time the timer circuit counts up the prescribed number of pulses in the clock signal;
• when the ticking timing of the clock unit is adjusted and changed, causing the first processor to output a synchronization request signal to the second processor at a next ticking timing of the clock unit that occurs after the change in the ticking timing, so as to request the second processor to perform resynchronization;
• and
• causing the second processor, upon receipt of the synchronization request signal from the first processor, to reset the timer circuit so that the timer circuit starts a new count of pulses in the clock signal.