Video narration
Are LED and LCD screens really two completely different kinds of display? Imagine choosing between two TVs in a store. Both show a picture, but their labels describe different parts of how that picture is made. LCD means the image-forming panel uses liquid crystals to control light. It cannot produce light itself, so it needs a backlight behind it. Here’s the turn: LED usually names that backlight, not a separate panel. An LED TV is generally an LCD TV lit by LEDs. That can make a TV thinner and more power-efficient, and it can be bright. But LED alone does not guarantee a better picture. Contrast, color, and black levels depend on the panel and the backlight design. So back at the store, don’t treat the labels as equal alternatives. LCD describes the panel; LED usually describes its backlight. Most LED TVs are LCD TVs with LED lighting.