Ключевые слова: audiovisual, background, beam, blue, business, camera, cinema, closeup, conference, digital, display, education, electric, electronic, entertainment, equipment, film, home, industry, lamp, led, lens, light, meeting, modern, monitor, movie, multimedia, object, office, presentation, projection, projector, retro, room, screen, seminar, show, slide, space, technology, video, white,