- on Miscellaneous Electronics
- Published in issue 7/2009 on page 98
For devices where there's no need to read an LCD continuously, the backlight doesn't need to stay lit up all the time — several seconds is often all you need to read the display. This saves a little power and lengthens the life of the backlight. Devices fitted with an LCD also have a processor, and so it's possible to employ a function to control the backlight directly from within the processor software.