Turnoff backlight from LCD screen with qt application running in Background

Technical Support
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1

Hello all,

I would like to turn off my backlight in LCD rouchscreen display, while the qt application should run in background.

I tried with /etc/power/state with standby and freeze. but it restarts my application.

is there any possiblity to turn off backlight.

Thank you

Regards,
Uvi

2

thank you for the suggestion. I found the answer to implement the backlight power on/off.

3

how did you implement your solution?

4

How is your display connected to your Apalis device? Backlight control is usually implemented with an on/off switch which you can control via a GPIO, and/or through dimming with PWM.

5

Ok, thanks for the information.

6

i found the backlight BLK_ON gpio pin from the datasheet and implemented it in the device-tree.