vetítképerny

A vetítképerny, or projection screen, is a surface specifically designed to display images projected by a projector. It is typically a white or light-colored material with a matte finish to ensure uniform light reflection and prevent hot spots. The primary purpose of a projection screen is to provide a suitable and optimized surface for viewing projected content, enhancing image quality such as brightness, contrast, and color accuracy.

Projection screens come in various types and sizes to accommodate different viewing environments and applications. Common types include fixed-frame screens, which are permanently mounted on a wall, and retractable screens, which can be rolled up when not in use. Retractable screens can be manual or motorized. The material of the screen is crucial, with different coatings and textures available to suit specific needs, such as improving black levels or handling ambient light. The gain of a projection screen refers to its reflectivity compared to a standard white surface; a gain of 1.0 is considered neutral, while higher gains make the image appear brighter but can narrow the viewing angle. Conversely, lower gains can reduce brightness but offer wider viewing angles and better contrast. The size and aspect ratio of the screen are also important considerations, chosen based on the projector's resolution and the intended viewing distance and audience size.