LUCKFOX 7inch HDMI Portable Touch Screen // here: backlight

2024-02-23 22:03

Hi,
I'ld like to use the display with Raspi and I'm wondering, if the backlight of the display:
a) by chance may be turned off by GPIO or software-command (just talking about the backlight, not the whole display by xset ...)
b) if dimming may be possible by PWM ?
Regards, R.

2024-02-26 11:36

May I ask what device you are connecting the display to? If it's the Core3566, I recommend the following methods:
You can adjust the backlight through commands:

Code: Select all

  xrandr --output HDMI-0 --brightness 0.1
  xrandr --output HDMI-1 --brightness 0.8
  xrandr --output HDMI-1 --brightness 1.0

PWM dimming requires hardware modification. Generally, we do not recommend customers modify hardware themselves, as unauthorized modifications may void the product warranty.

2024-10-15 9:27

I also have a pair of 7 inch connected to a raspberry 3b+ and i would like to be able to control the brightness of it either by pwm or otherwise, the wiki instructions are not too clear (https://wiki.luckfox.com/Display/7inch- ... wm-dimming) what happens when you remove the resistor and bypass the pads? i don't mind losing the warranty.

Thanks