How to turn OFF backlight LED

[joe_1]

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]

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.

 

[rmn_tech]

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]

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.

 

[things]

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.