It’s another year and that means another Kindle Fire. It doesn’t look like Amazon will be introducing any new models this year, but it will be substantially upgrading all three of its current models though.

BGR reports that it has learned Amazon will be upgrading the displays on the Kindle Fire, Kindle Fire HD and Kindle Fire HD 8.9″. With this latest rumored upgrade, Amazon will finally have HD displays in all of its Kindle Fire models.

First up is the current $159 Kindle Fire. Amazon released an improved version last year, but it still had a measly 1024×600 display resolution. The company will be fixing that this year by using a 7-inch 1,280×800 display – the same display resolution seen in last year’s Nexus 7. The tablet is also expected to remain the low cost option, but it remains to be seen if the price will remain at $159.

Moving onto last year’s new models, the Kindle Fire HD will be received a pretty substantial upgrade. The current model only sports a display resolution of 1280×800, but the new one will reportedly have a 1920×1200 display resolution. It’s a solid resolution for a 7-inch tablet, and one that the new Nexus 7 will probably also sport.

The Kindle Fire HD 8.9″ is geting the biggest upgrade as it’s moving from a 1920×1200 display resolution to a 2560×1600 resolution. At only 8.9-inches, Amazon’s Kindle Fire 8.9″ will be the smallest tablet to features such a large resolution. In fact, most current 10-inch tablets can’t match that display, with Google’s Nexus 10 being its only current contemporary.

As for general design, the rumors state that the new Kindle Fires will feature a more “chiseled” design with sharp, instead of round, corners. The power and volume buttons have also been moved from the side to the top sloping back to avoid accidental button presses.

So, when can we expect the new Kindle Fires to start hitting stores? It’s currently rumored that Amazon is pushing for a September launch. The original Kindle Fire was announced and launched in September of last year so it makes sense to look forward to a similar scenario this year.

It should be noted that all of this is merely speculation for now, but it does seem highly plausible. We also might just hear something about the oft-rumored Kindle Phone this year, but that’s far less likely than the above rumors.