Full High Definition (FHD) is the resolution 1920x1080P. Ultra High Definition (UHD) is the resolution 3840x2160P. What this means is that there are more pixels per inch (PPI) in a UHD TV. This gives a higher resolution on the TV. UHD is used on larger TVs so you can sit closer to the TV and still enjoy a crisp, clear picture
What is Full HD?
Full HD refers to 1080p image resolution. Full HD is the standard resolution for Blu-Ray, digital television, and most HD videos found online, like those on YouTube, Netflix, and Vimeo. Below Full HD sits standard high definition or 720p – a high definition image resolution that is lower than full 1080p. On the upper end of the spectrum, there is Ultra HD (UHD or 4K). This image resolution is larger, crisper, and clearer than even 1080p.
In some cases, the term “HD” may be used interchangeably with “Full HD” to describe a product’s image resolution. This can easily lead to confusion, as HD can also refer to standard high definition, or 720p. For clarity, you should know that HD may refer to 720p or 1080p, but Full HD can only refer to 1080p.