NOVELTY - A rolling device comprises a curtain body (10) having two outer layers (11, 12) made of light-transmitting flexible material, and a functional layer (13) provided between the two outer layers. The functional layer comprises at least two parallel functional parts (131, 132, 133, 134) which can be utilized for converting light energy or processing light.    USE - Rolling device used for converting light energy or processing light, e.g. converting incident solar energy into electrical energy, illuminating, and transmitting or deflecting incident light (claimed). The device can be hung outdoor or indoor to function as, e.g. rolling blind or window shutter.    ADVANTAGE - The rolling device is provided with functional parts having different functions so as to switch different functional parts and perform the functions of the rolling device according to the demand, thus making it highly efficient to use.    DETAILED DESCRIPTION - A rolling device comprises a curtain body (10) having two outer layers (11, 12) made of light-transmitting flexible material, and a functional layer (13) provided between the two outer layers. The functional layer comprises at least two parallel functional parts which can be utilized for converting light energy or processing light. The functional parts include a first functional part (131) adapted for converting incident solar energy into electrical energy; a second functional part (132) adapted for illuminating by the electrical energy generated by the first functional part; a third functional part (133) adapted for transmitting incident light with specific wavelength; and a fourth functional part (134) adapted for deflecting incident light into different directions. The first functional part comprises electrode layers (131a, 131b) and electrical energy converting layer (131c). The second functional part comprises electrode layers (132a, 132b) and electroluminescent layer (132c). The third functional part comprises light filter layer (133a). The fourth functional part comprises transparent refractive layer (134a) formed with light refraction structure (134b).    DESCRIPTION OF DRAWING(S) - The drawing is a cut-away sectional view illustrating the rolling device.    Curtain body (10)    Outer layers (11, 12)    Functional layer (13)    Functional parts (131, 132, 133, 134)    Electrode layers (131a, 131b, 132a, 132b)    Electrical energy converting layer (131c)    Electroluminescent layer (132c)    Light filter layer (133a)    Transparent refractive layer (134a)    Light refraction structure (134b)