壁紙 (kabegami) Japanese meaning: wallpaper (physical) | KotomoraI changed the wallpaper in the room.
Usage patterns
壁紙を貼るto put up wallpaper
I put up new wallpaper on the living room wall.
壁紙に設定するto set (an image) as one's wallpaper/desktop background
I set this photo as my phone's wallpaper.
壁紙を張り替えるto re-paper (replace old wallpaper)
We decided to replace the old wallpaper.
壁紙を変えるto change one's desktop/phone wallpaper
I changed my computer wallpaper for a change of mood.