wall, fence
屏 centers on a physical barrier that divides or encloses space: a wall or fence. It can also extend to the idea of screening or shielding something from view.
folding screen
painted folding screen with scenes of early European visitors to Japan
living in retirement
bated breath; being cowed into silence
solitary confinement
sheer cliff
picture drawn on a folding screen
bed(side) screen
fence; bulwark; guarding wall
solitary confinement in a dark cell without bedding (for up to one week)
folding screen covered with gold leaf
partitions in a Japanese house (e.g. screens, sliding doors, etc.)
屏 combines 尸 (a roof or covering) with 并, which likely contributes the sound. The character originally referred to a screen or partition inside a building, later extending to walls and fences.
The outer 尸 is like a roof or cover, and inside 并 looks like two panels joined together. Picture a folding screen or a wall made of connected panels under a roof: 屏 is a wall or fence.
For ヘイ, imagine a wall so tall it reaches the heavens: 'hey' (ヘイ) is what you shout to get someone's attention over the fence.