How to turn off the display from the Raspberry Pi OS

Question

I searched the web on information about turning off the display and controlling its brightness from within the raspberry pi OS, what I gathered is that it works on some displays and not in others.

I'm looking to buy a display between 5 to 7 inch, and I want to be sure that I can control its brightness and be able to turn it off and on from within the Raspberry PI OS. The reason is that I want to have RPI running all day, and I want to save energy and extend the life of the screen by turning it off and sometimes lowering its brightness.

I've checked some Waveshare displays, and what I noticed is that the display can be controlled from within RPI OS, but it seems this is possible only for display with a DSI connector instead of a HDMI one. Another display brand I found has DSI but the display can't be controlled from RPI OS.

Since a lot of these display have poor documentation where they don't state whether they support controlling the display from RPI OS, what should I look for in a display to make sure it does what I want

Answer 1

For dimming you can adjust the output brightness and for turning off you can simply just stop the output to the display and the display should automatically turn off but I don't know how to turn it back on also most displays also have a setting to auto turn off They don't like people recommending a single product or service but I would recommend at least a 1080p with 60hz with a rpi 3 and you could do 4k for a rpi 4 and 5 but it may be a little slow