2024 - Why is daylight always White?

Daylight holds infinite potential. The sun is the source of all life and energy on Earth, providing us with essential health and happiness. Therefore, effectively utilizing sunlight when designing indoor environments is crucial. Many innovators around the world have proposed various methods to harness the energy of sunlight or effectively control and utilize its intensity indoors. However, natural light is still relatively limited in its use compared to artificial light in indoor settings. We aim to approach daylight from a new perspective. Can natural light be utilized in as many diverse ways as artificial light? This project began with this question. We seek to explore methods of utilizing sunlight to create unique lighting effects in indoor environments and to harness the infinite potential of natural light. By doing so, we aim to infuse indoor spaces with the vitality of nature and provide a healthier and happier living environment. We hope our efforts to explore the infinite possibilities of light will inspire many others.

The device is composed of three main components designed to efficiently capture and control sunlight indoors: light-collecting lenses, a prism that separates the collected light by wavelength, and a louver unit that redistributes the separated light to create desired lighting effects. The light-collecting structure consists of two protruding Fresnel lenses. These lenses move together to maximize the collection of external light in a lightweight and economical manner, directing it into the building’s interior. The ceiling surface, which is part of the louver system, is equipped with reflector plates. The collected light undergoes two reflections before being directed into the building’s interior through a prism. The prism separates the incoming light by wavelength, causing the light to travel in different directions. The light separated by the prism enters the slits made of louvers, naturally dividing according to wavelength. One side of each slit is coated with a reflective material, redirecting the light downwards into the indoor space. Each louver is positioned at varying heights, maintaining a consistent interval to ensure the separation of light by wavelength is uniform.

The colors and temperature of light in the surrounding environment have a significant impact on human emotions and behavior. For example, in general cases, red provides active energy, blue provides stability, and green provides natural comfort.

Each louver is part of the overall system, rotating around an axis to adjust its angle. The angle of the light projected onto the surface with reflective coating changes according to the angle of the louver. By controlling each slit individually, you can adjust the direction of light and even selectively block or allow light of specific wavelengths to pass through.

The lenses and reflectors can move consistently according to the sun’s movement or be controlled as desired. This allows for maintaining a constant angle of light incidence onto prisms, thereby fixing the color of light in a specific space regardless of time. Alternatively, independent control of reflector movement allows for continuously changing dynamic light effects separate from the sun’s movement.