Projected image on a screen is not always vivid enough when it is projected in a bright room where audiences want to read paper documents simultaneously. We have suggested a new projection system which can realize high contrast image projection in a bright room. It is consisted of electronic paper screen, projector and LED room light. The e-paper screen alternates its whole surface white/black with 120Hz. Room lights are controlled with the same frequency of 120 Hz with the opposite phase as that of the e-Paper screen. We have confirmed that our new system has achieved higher contrast than the conventional projection system and also enough readability of paper documents in the room simultaneously. We have thus confirmed that our new system can bring an ideal condition, for audience, which can realize a vivid image projection in a bright room.