Is there an app that let's you display custom stuff (a picture or text) permanently on all inputs?

by depressive_monk

I don't have Internet on my TV so I would be able to sideload it. Is there an app that does this? Basically I just want to display a single pixel permanently so the backlight won't turn off on black screens (which my TV hard-codedly does, sadly).

activoice

If you display a single pixel I'd be concerned that it would burn in...

What if you use a screensaver App like Dreamy?

https://play.google.com/store/apps/details?id=com.samabox.dreamy