| 摘要 |
PROBLEM TO BE SOLVED: To allow operation on a screen without inhibiting display of a projection image even without using a touch panel, so as to make a strong impression to a viewer.SOLUTION: A projection system comprises: a projection unit that radiates video light of an image; a screen unit that receives the video light radiated from the projection unit on a rear face side and projects the video light on a front face; and an optical sensor that is provided at a position on the rear face side of the screen unit and out of a projection range of the video light radiated from the projection unit. The optical sensor radiates light beams toward within the projection range projected on the screen unit. |
