Final answer:
The most common display technology used in modern laptops is LED. Older technologies like CRT have been replaced by more energy-efficient and clearer LED-backlit LCD screens.
Step-by-step explanation:
The display technology most commonly used in modern laptops is LED (Light Emitting Diodes). While CRT (Cathode Ray Tube) was used in older television sets and computer monitors, it has been replaced by flat screen technology. Modern laptops utilize flat-panel displays for their screens, and among them, LED-backlit LCDs (Liquid Crystal Displays) are the most prevalent. These screens consist of two layers of glass which liquid crystal material between them, and a light source such as LEDs at the back of the screen. This light is adjusted to display images by blocking or allowing light to pass through the liquid crystals. LED displays are popular because they are energy-efficient, have good color accuracy, and offer clear visibility from various angles.