Patent ID: 7894132

Claim:
A screen comprising: a flexible screen body onto which an image light is projected; a first storage member including a screen wind-up section configured to support either end portion of the screen body and to wind-up the screen body and a base body configured to support the screen wind-up section; a second storage member configured to support the other end portion; and a retention member configured to hold both the first and second storage members, the retention member including a column and a pair of arm members, the column extending along the screen body in a direction that is substantially orthogonal to where the first and second storage members are opposing each other, the pair of arm members being configured to couple together the column and the first and second storage members, and one end of each of the arm members being respectively configured to rotatably couple to the first and second storage members and the other end of each of the arm members being configured to rotatably couple to the column, wherein: the retention member includes a moving member surrounding an outer portion of the column, the moving member being configured to move along the column, the retention member includes a pair of coupling members whose ends are rotatably coupled to the moving member and whose other ends are respectively rotatably coupled to the arm members, and the column has a width-difference section configured to restrict movement of the moving member along the column.