Final answer:
The three major types of display devices in today's industry are CRT monitors, which have been mostly replaced by newer tech; LCD monitors, used widely in laptops, tablets, and TVs; and data projectors, which project images onto surfaces.
Step-by-step explanation:
The three major types of display devices in use in today's industry are CRT monitors, LCD monitors, and data projectors.
CRT monitors, short for Cathode Ray Tube monitors, use electron guns that accelerate electrons to produce images on a phosphorescent screen. This technology has been largely replaced by more modern displays but was once the standard for television and computer displays.
LCD monitors (Liquid Crystal Display monitors) are flat-panel displays commonly used in laptop computers, tablets, and flat screen televisions. LCD screens use a backlight and liquid crystals to modulate light and create images. The technology is renowned for its energy efficiency and quality of display.
Data projectors project images from a computer or other input source onto a large screen or surface. These devices use LCD technology in most cases, though other types like DLP (Digital Light Processing) are also common.