Which of the following display types may be practical for a laptop format, but has limited uses due to heat considerations?

LCD technology uses a backlight and liquid crystal layer, producing minimal heat, and is one of the most common laptop display technologies.

Plasma displays work by igniting small pockets of noble gas to produce light, a process that generates substantial heat and consumes considerable power. While plasma panels can technically be manufactured in a flat form factor suitable for portable devices, the heat output and high power draw make them incompatible with the tight thermal budgets and battery constraints of laptop designs. Their practical use has been largely limited to large-format stationary displays like televisions.

LED displays (or LED-backlit LCDs) are extremely energy-efficient with very low heat output, making them ideal and widely used in laptops.

CRT displays are large, heavy, and bulky due to their cathode ray tube design and cannot be adapted to a laptop form factor at all.