Computer Hardware
LCD
Definition
A liquid-crystal display (LCD) is a flat-panel display or other electronically modulated optical device that uses the light-modulating properties of liquid crystals combined with polarizers. Liquid crystals do not emit light directly, but instead use a backlight or reflector to produce images in color or monochrome.
Why It Matters
For many years, LCD was the dominant flat-panel display technology, used in everything from TVs and computer monitors to smartphones and digital watches. It made thin and lightweight displays possible.
Contextual Example
Most budget and mid-range computer monitors and TVs still use LCD panels. They are a mature and cost-effective technology.
Common Misunderstandings
- So-called "LED TVs" are actually LCD TVs that use LEDs for their backlight instead of older CCFL tubes.
- LCD panels cannot produce a true black, as some of the backlight always leaks through, resulting in a dark gray. This is their main disadvantage compared to OLED.