Shutter

A shutter comprising:

• a window frame;
• and
• a plurality of light-guiding devices, each of said light-guiding devices being pivotably mounted to said window frame, and including
• a light collector that includes
• a light-guiding plate having a first end portion and a second end portion opposite to said first end portion in a first direction, and
• a plurality of light-collecting members disposed on said first end portion of said light-guiding plate and arranged in the first direction, each of said light-collecting members being elongated in a second direction perpendicular to the first direction, and having a curved surface that is adapted for reflecting light beams that travel into said light-collecting member and encounter said curved surface so that the light beams travel into said light-guiding plate, and
• a beam expander that is disposed on said second end portion of said light-guiding plate of said light collector, an area of a cross section of said beam expander orthogonal to the first direction increasing as said beam expander extends away from said second end portion, when the light beams travel into said light-guiding plate, said light-guiding plate being adapted for the light beams to reflect therein, to be collected at said second end portion thereof, and to travel through said second end portion into said beam expander;
• wherein said window frame is rectangular, substantially lies in an imaginary frame plane, and has four side portions, said shutter further comprising a soffit board that is pivotably mounted to one of said side portions and that is located above said light-guiding devices, said soffit board being pivotable between a service position, in which said soffit board is oblique to the imaginary frame plane, and a storage position, in which said soffit board is parallel to the imaginary frame plane;
• and
• wherein said soffit board includes a board body, a plurality of first micro-scale optical members that are disposed on one side of said board body, and a plurality of second micro-scale optical members that are disposed on another side of said board body opposite to said first micro-scale optical members.