Projektori

Projektori is a device that projects an enlarged image onto a screen or other surface. It combines a light source, an imaging core (such as LCD, DLP, or LCoS), and projection optics to display content generated by a video source, computer, or photographic media. In Finnish usage, projektori refers broadly to both data projectors and traditional slide or film projectors.

History and development notes that projection technology has evolved from early devices like the magic lantern and slide projectors to modern digital projectors. The transition to digital imaging in the late 20th century enabled higher resolutions, improved color reproduction, and new use cases in education, business, and home entertainment.

Technology and formats commonly found in projektori include LCD, DLP, and LCoS imaging cores. Light sources vary from conventional UHP lamps to LED and laser designs, offering different lifetimes and color characteristics. Brightness is measured in ANSI lumens, while resolution can range from standard definition up to 4K. Throw ratios determine how far the device must be from the screen to fill it, and many models offer short-throw or ultra-short-throw configurations for limited spaces. Connectivity typically includes HDMI, DisplayPort, USB-C, and sometimes wireless options. Some projektori are designed for front projection, while others support rear projection or ceiling mounting.

Applications span education, business presentations, and home cinema. Market trends emphasize higher brightness, better color accuracy, longer-lasting light sources, portability, and easier installation. Leading manufacturers commonly cited include Epson, Optoma, BenQ, Sony, and NEC. The choice of projektori depends on lighting conditions, screen size, required resolution, and budget.