Brightness enhancement factor (BEF) is a measure of the increase in luminance achieved by a display system, compared to a diffuse white reflecting surface. It is a key parameter used to evaluate the performance of a display, especially in outdoor or high ambient light environments.
The BEF is defined as the ratio of the luminance of a display system to the luminance of a diffuse white reflecting surface, both viewed from the same angle. In other words, it measures how much brighter the display appears compared to a typical white surface.
BEF is often used to compare different types of display technologies, such as liquid crystal displays (LCDs), organic light-emitting diodes (OLEDs), and emissive displays like plasma and CRT displays. It is also used to evaluate the performance of display enhancements like anti-reflective coatings, polarizers, and optical films.
A higher BEF indicates that a display is more efficient at reflecting and concentrating light towards the viewer, resulting in a brighter and more vivid image. In general, outdoor and high ambient light environments require displays with higher BEFs to ensure that the display is visible and legible.
In summary, brightness enhancement factor is an important parameter for evaluating the brightness and visibility of displays in various lighting conditions, and is a key consideration in choosing a display technology for a particular application. learn more about Admission Management.