LG has announced a new 5-inch smartphone display with a 1920 x 1080 pixel resolution and a whopping 440ppi pixel density.

The display is based on AH-IPS (Advanced High Performance In-Plane Switching) technology, which — claims LG — offers high color fidelity, wide viewing angles, stable image and rapid response speed when touched.

Although the iPhone 4/4S' Retina display is not the highest pixel density smartphone display around any more, it's definitely the display that started the pixel density craze, with smartphone manufacturers racing to squeeze more pixels into their devices' screens.

Furthermore, several rumors say that the next generation iPhone will feature a larger, 4-inch screen with a higher (possibly 640 x 1136 pixel) resolution.

LG's new display, however, sounds like it has all the ingredients to become the new king of smartphone screens. Its insanely high resolution, coupled with a 16:9 widescreen aspect ratio which makes it ideal for viewing video content, will set a high bar for other manufacturers to reach.

The display is expected to be released during the second half of this year, and it will be exhibited at SID 2012 Display Week in Boston which starts June 4.