What is the purpose of a video projector?

The purpose of a video projector is specifically to display images or video onto a surface, typically a screen or wall. This device takes video input and uses various technologies—like LCD, DLP, or LCoS—to project the visual content at a larger scale, making it visible to an audience. Video projectors are extensively used in settings such as classrooms, conference rooms, and home theaters to create an engaging viewing experience.

In contrast, enhancing audio quality, recording sound for playback, and switching between different video inputs pertain to other audio-visual equipment and technologies that support or complement video projection but do not define the primary functionality of a video projector itself. Thus, the focus on displaying visual content clearly identifies option B as the correct answer.