---
title: 4K UHD
description: 4K UHD is a display resolution of 3840 × 2160 pixels, four times the pixels of Full HD, used for sharp signage on large screens.
type: glossary
term: 4K UHD
category: display
shortDefinition: 4K UHD (Ultra HD) is a display resolution of 3840 × 2160 pixels — four times the pixel count of Full HD (1920 × 1080). On signage it keeps text and fine detail sharp on large screens viewed up close.
seeAlso:
  - Aspect ratio
  - Pixel pitch
  - Media player
visual: 4k
inLoopvew:
  text: Loopvew plays 4K content on players and displays whose hardware supports it.
  label: Android player highlights
  href: /platforms/android
---

4K only pays off when every link in the chain supports it: the panel, the player hardware, and the content itself.

## Why it matters

- **Content at native resolution.** Export images and video at 3840 × 2160 for a 4K screen. Upscaled 1080p content looks soft next to true 4K.
- **Player headroom.** Decoding 4K video takes a capable chipset. Budget media players may play 4K images but struggle with 4K video.
- **File size.** 4K video files are several times larger than 1080p, which affects download time to each screen.

For small screens viewed from a distance, Full HD is often indistinguishable from 4K and cheaper to run.