Reunavalaisutekniikka

Reunavalaisutekniikka, a Finnish term, translates to edge lighting technique in English. It refers to a method of illuminating a surface from its edges. This technique is commonly employed in various applications, particularly in display technologies and architectural lighting. In the context of displays, such as older LCD screens, edge lighting involves placing light sources, typically LEDs, along the perimeter of the panel. Light is then guided across the display surface using a light guide plate, creating a uniform illumination necessary for the pixels to be visible. This approach was a cost-effective and power-efficient way to backlight displays, though it has largely been superseded by full-array local dimming (FALD) in higher-end devices for better contrast and black levels.

Beyond displays, reunavalaisutekniikka is utilized in architectural and decorative lighting. Here, light is directed along the edges of materials like glass, acrylic, or stone to create subtle yet striking visual effects. This can highlight the form and texture of an object or surface, add depth to a space, or create ambiance. The light sources can be embedded within the material itself or positioned externally to shine onto the edges. The effectiveness of reunavalaisutekniikka depends on factors such as the material's translucency or reflectivity, the angle and intensity of the light, and the design of the light sources and any diffusing elements. It offers a sophisticated and minimalist approach to illumination, often favored in modern interior design.