How does Winston feel about the telescreen?
Winston, the protagonist of the novel, seems bleak and hopeless in response to the telescreen. When he is facing the telescreen his expression is that of quiet optimism, as letting one's thoughts wander in public places can be dangerous.
What is the purpose of the telescreen in Winston's apartment?
The telescreen cannot be turned off for an unusual, and rather sinister, reason: the Party uses it to monitor the every moment and conversation of Party members. It is like having a CCTV camera in Winston's apartment which live streams his every move to the Inner Party members.