Half a year ago the first smartphone with a HD screen was released by Samsung. Now LG is fighting back with a 5 inch mobile screen capable of Full HD resolution.

Currently, top of the range 55 inch televisions use Full HD 1080p screens. LG’s mobile screen is 11 times smaller, but still manages to cram in 1920×1080 pixels, resulting in a viewing experience so natural, the naked eye won’t be able to distinguish individual pixels.

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Cramming 1080p resolution into a 5 inch screen endows it with a 440 pixel-per-inch (ppi) density, ultimately making it receptive to touch input. By comparison, Apple’s beloved iPhone 4S (3.5 inches) has a 326ppi, while Samsung’s anticipated Galaxy S3 (4.8 inches) has a 306ppi.

LG’s screen maintains a cinematic 16:9 aspect ratio, and according to Engadget, uses Advanced High Performance In-Plane Switching (AH-IPS) technology to ensure wide viewing angles, rapid response times and improved brightness efficiency.

Unlike Samsung’s AMOLED screens, LG’s screen uses LCD technology.

Mobile screen technology is rapidly progressing. Samsung’s Galaxy Nexus was the first smartphone with a HD screen, and LG claim it will have the aforementioned screen in a product by the second half of the year.

Recently LG’s Head of Mobile Communications, Ben Glimmerveen, recognised LG has slackened off in the smartphone market. Speaking to PCWorld Australia, he said:

“We were behind the game in smartphones, we dropped the ball. That’s a global admission and it’s good that we’ve done that.”

Glimmerveen said LG will aggressively compete in the smartphone market by banking on 4G technology.

“What we’ve done now is we’ve been on the front foot with the next tier of where this telecommunications phase is going which is LTE.”

However, it looks like LTE tech will be coupled with this Full HD screen, making LG one of the companies to keep an eye on in the smartphone industry.

In the meantime, the screen will be on display at the SID 2012 Display Week in Boston from next week.