| 摘要 |
PROBLEM TO BE SOLVED: To reduce cooling load and heating load by providing a laminated body made of a light permeable substrate to which a liquid crystal material is added as a main constituting member, setting a light. permeability having a specified wavelength at a specified temperature to a specified value in each layer, and setting a light reflectance to a specified value. SOLUTION: A laminated body made of a light permeable substrate having a liquid crystal material added therein is provided as a main constituting member. In the laminated body, a light permeability having a wavelength of 400-750nm is set to 50% or higher at a temperature of 313K, a light permeability having a wavelength of 750-2000nm is set to 60% or higher at a temperature of 273-288K, a light permeability having a wavelength of 750-2000nm is set to 40% or lower at a temperature of 298-313K, and a light reflectance having a wavelength of 750-2000nm is set to 50% or higher. Preferably, the liquid crystal material consists of a mixture which contains at least one kind of an optically active liquid crystal compound, and an average thickness is set to 3-100μm. The light permeable substrate is made of an inorganic glass or an organic glass.
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