AVIXA Recognized AV Technologist Test 2025 – 400 Free Practice Questions to Pass the Exam

LCD, or Liquid Crystal Display, is classified as a transmissive display technology because it relies on a backlight that shines through liquid crystals to create images. In an LCD, the liquid crystals modulate light to produce the colors and images that appear on the screen. The backlighting is essential to its operation, as the liquid crystals do not emit light on their own but instead control the passage of light from the backlight to create the visual output.

In contrast, other technologies mentioned function differently. Virtual reality headsets often combine various display methods, including both transmissive and emissive technologies, depending on the design and type of screen used. Interactive whiteboards typically utilize a combination of projection and touchscreen technologies, focusing more on interactivity rather than purely display characteristics. LED displays, while they may refer to light-emitting diodes used in screens, are typically classified as emissive displays, where the individual pixels emit their own light rather than relying on a backlight source.

Understanding these distinctions is essential for recognizing how different display technologies operate and how their classifications impact their application in various settings.