Fujitsu has unveiled a prototype smarphone powered by a quad-core processor at the Consumer Electronics Show in Las Vegas.

At the CES a number of tablet makers have been talking about the benefits of quad-core processors in their devices, but it seems Fujitsu beat them to it their new Arrows device, shown under a protective plastic cover in the Fujitsu booth, which uses Nvidia's Tegra 3 processor and runs Android 4.0 Ice Cream Sandwich.

(Fujitsu showed off this Arrows smartphone prototype running a quad-core processor and Android 4.0 a white iPhone is used for scale)

Many smartphones, including all of the Windows Phone models, run on a single processor core, so the emerging dual-core smartphones are considered a big leap ahead in processor speed. Quad-core phones would represent yet another jump in power.

The quad-core prototype has a 4.6-inch screen and an LTE radio, as well as a 13-megapixel camera, a booth representative said.

The device doesn't have a specific name, but falls in the Arrows line of phones. No details on availability or pricing have been announced.

Fujitsu also had another Arrows smartphone on display with no specific name. It comes in at 0.26in thick, making it the thinnest smartphone. That device has a 4in display and runs Android 2.3 with a Qualcomm MSM8655 1.4 GHz processor and a 1400 mAh battery. It is also waterproof.