screen sharpness config ??

Hadron said:

There is no general "screen sharpness" setting in Android, though few of us will have any experience with android-based projectors and they may have settings or options that most android devices do not (and may also lack options that other devices have). Also it may depend on what Android version you are running and who the manufacturer is.

Recent Android versions may have a "display size" item in Settings > Display > Advanced, but that basically scales some items on the screen rather than affecting screen resolution. The "developer options" menu, if you can access that(*), usually has a dpi setting (called, unhelpfully, "smallest width" on my device). Again the main effect of that is scaling of UI elements (e.g. if I fiddle with that my wallpaper is unaffected), so it doesn't quite sound like what you see.

If you were rooted and messing with kernel settings that would be different, but we're talking about stuff that is hard-coded there and so not something that can spontaneously change or be altered by the user without root access (and unless this is a very strange device you would know if you were rooted).

(*) To access Developer Options go into your Settings, find the "build number" in the software information, and tap on it repeatedly. It will eventually tell you that you are now a developer. But there are devices which simply don't have this menu/where it has been locked rather than simply hidden behind an Easter Egg, so I can't guarantee that this will work for you.

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