| 摘要 |
The invention relates to a roll-up projection screen comprising a motorized roll-up tube (25) capable of rolling up a projection surface and a cladding (40) of an opening provided in a ceiling for the attachment of the said roll-up tube in a plenum above the said ceiling, the said cladding comprising a central portion (45) furnished with a slot (49) provided for the said projection surface to pass through when it is unrolled. |
