LCD Power Consumption Question

On any of the digital watches, when the timer(s) is working, there is a slight increase of power consumption. The increase is more due to the additional activity, than the LCD display itself. Depending on the model, the power consumption increase can be a number of micro-amps. This will make some difference in the battery life, but over a very long period.

Considering that a battery is not very expensive, you should enjoy the watch and not worry about it.

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Jerry G. =====

Since I normally keep the LCD in "show today's date" mode, and there's no seconds hand, there's usually no visible movement. But sometimes I switch the LCD to the Timer (stopwatch) mode, and then the hundredths of seconds and seconds flash past in a continuous moving display. I can keep the timer running in the background while switching back to a static display (such as the date), but I prefer to keep the timer visible when it's running.

Here's my question: Is the drain on the watch battery greater when there's visible movement in the LCD portion of the display? Or does an LCD displaying a static image consume the same amount of power as that same LCD when displaying a moving image? (I suppose there might even be an additional question as to whether the watch's microprocessor consumes more power when keeping the stopwatch-timer running, in addition to the regular time function that must always be running.)

Thanks much for any enlightenment.

-- Lawrence San Cartoon Stories for Thoughtful People:

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