LED vs LCD: What’s The Difference?

Light emitting diode (LED) and liquid crystal display (LCD) are two of the most common forms of electronic displays. Whether you’re familiar with them or not, chances are you’ve seen or used them before. LED and LCD displays are used in televisions, computer monitors, tablets, smartphones, and a variety of other applications. And while they may seem similar to the untrained eye, there are several key differences between LED and LCD technology.

LED

With its first electronics-based applications appearing back in 1962, LED involves the use of a two-lead semiconductor to produce light. The technology is based on a simple principle in which the activation of a pn-junction diode generates light when activated. Voltage is applied to the leads, at which point electrons fill electron gaps or holes within the device, causing it to release photon (light) energy.

LCD

As the name suggests, liquid crystal displays use lighted, liquid crystals to produce the display. Contrary to what some people may believe, however, the actual crystals do not emit light. Instead, light is created through an alternative source, such as a back-lit display, and projected through the crystals. Within an LCD, you’ll find a layer of molecules that are aligned with two transparent electrodes and polarizing filters. The polarizing filters allow the light to pass through without being be blocked.

One of the advantages of LCD is its efficient use of energy. LCD is often used in battery-powered watches, alarm clocks, and other devices for this very reason. While LED or other types of display technology could technically be used for such purposes, the device would die faster and thus require more frequent recharging or replacing of the batteries. LCD solves this problem by using minimal energy when compared to other types of display technology.

Should I Choose LED or LCD?

There’s really no easy answer to this question, as it depends on the application for which the technology will be used. LED has become the go-to choice for most consumers looking for a new high-definition television, whereas LCD remains a popular choice for touchscreen devices and computer monitors. Regardless, you can’t go wrong with either LED or LCD. They are both two versatile forms of electronic display technology that can deliver incredibly images.