This is the 647th most frequent Japanese word.
画面
Screen; display.
Here, '画面' refers to the screen or display of the computer hardware.
パソコンの画面がフリーズして動かない。
The computer screen is frozen and unresponsive.
In this case, '画面' represents the display of the television that shows the image of her smile.
彼女の笑顔がテレビの画面を通して見える。
Her smile can be seen through the TV screen.
'画面' here denotes the graphical interface or layout of the application's display.