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How to turn OFF backlight LED

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joe_1

Member
I got an LCD with backlight provided by 15V LED. If users leave the LED turned ON for long time, it will shorten the life of the LCD.
I would like to be able to turn OFF the backlight LED after some 5 minutes of non-use.
But I do not have good idea how to do it.

How to use the PIC to control 15V line going to the LCD, and turn it ON/OFF?
If someone has any idea please let me know.

Thanks.
 

PatM

Member
You should be able to set the Power management of your display screen so that the display goes off after so many minutes.
Power management is built into most laptops , netbooks and desktops.
 
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rmn_tech

Member
Use of the back light will not shorten the life of the LCD. It's a light behind the LCD. Does the use of your light at home shorten the life of your windows ?
 

giftiger_wunsch

New Member
He probably included the LED backlight as part of the LCD unit when he referred to shortening the life of the LCD there; that's being a little picky rmn_tech. As far as I'm aware though, LEDs generally have very long lives. Turning off the backlight would certainly be useful to conserve power, but I don't think you'd need to worry too much about wearing out the LED.
 
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things

New Member
What kind of LCD is it? Computer monitor, dot matrix etc?!

If it's a computer monitor, turning off the backlight automatically can be done thru Windows, if it's a external LCD usually they have a separate pin for the backlight, you would just have to switch that.
 
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