Japanese researchers have developed a transparent sheet that lets in less sunlight in the summer and more in the winter.

As part of the Resourceful Design trend from our Future of Home Living report, which looks at how a new range of highly-efficient products and appliances for the home are lowering resource consumption, we’re highlighting an innovative window treatment called Invisible Blinds. The product is a transparent blind that is designed to let in less sunlight in the summer and more in the winter to help regulate heating and cooling needs and reduce the associated costs.

Completely invisible to the human eye so they won’t impede your view or clash with existing decor, the blinds’ unique surface blocks light entering the window at a high incidence angle, which occurs during the summer, and allows light in at a low incidence angle, during the winter. Developed by Japan’s National Institute of Advanced Industrial Science and Technology and Sumitomo Chemical Co Ltd, the blinds are a simple solution that work in the background, without the need for human control or interaction.

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