Patent ID: 8863810

Claim:
A screen comprising: a screen base body including a first substrate and a second substrate, each of which includes: a sheet part having an outer surface and an inner surface, the outer surface of the first substrate being substantially uniform and planar so as to be configured to reflect a projected light image, the inner surface of the first substrate facing the inner surface of the second substrate, and a connecting part provided at the inner surface of the sheet part, the connecting part of the first substrate being detachably connected with the connecting part of the second substrate, each of the connecting parts including a plurality of engaging portions disposed on the inner surface at predetermined intervals in a first direction extending along the inner surface and also disposed on the inner surface in such a manner so as to extend in a second direction perpendicular to the first direction, wherein each of the engaging portions is an elongated bar; the screen is configured so that when the screen is used, the screen base body is produced by engaging the engaging portions of the first substrate with the engaging portions of the second substrate such that the substrates can be combined and such that the engaging portions of each of the substrates make contact with the inner surface of the sheet part of the other substrate; and the engaging portions are configured to engage with each other over the entire dimension of the inner surface in the second direction.