Before the Tang Dynasty, traditional window designs were mostly characterized by straight mullions. During the Ming Dynasty, a new type of window known as the "lying window" began to gain popularity and was further developed. In the Song Dynasty, brick towers featured various styles of vertical mullion windows. By the Ming Dynasty, some brick towers also incorporated lying windows, which became quite common. These early forms can be seen as the predecessors of modern blinds.
Windows throughout history have been made in a few basic styles—either with horizontal or vertical bars. The horizontal bar design is considered the prototype of louvered windows. However, there is a subtle difference between the traditional "lying window" and modern blinds. While lying windows are flat and allow for transparent gaps, blinds feature slanted slats that are not visible from above or below, only from the side. In ancient times, wooden windows were primarily used to improve ventilation and air circulation within homes.
Over time, blinds have undergone many improvements and are now widely used in modern buildings. Interestingly, the modern version of the blind was invented by an American named John Hampson, who obtained a patent for his design on August 21, 1841.
There's also a distinction between louvers and Venetian blinds. Louvers typically refer to wide, slatted panels used for shading and ventilation, both indoors and outdoors. Venetian blinds, on the other hand, resemble curtains with small, adjustable slats that can be gathered together. You might often see them in homes or on television.
Today, louvered curtain walls have evolved from traditional blinds and are increasingly popular in high-rise buildings due to their aesthetic appeal and practical benefits. They offer excellent control over light and airflow while adding a modern, elegant look to architectural designs.
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