UPDATE: SCEE's CEO David Reeves has denied any knowledge about a proposed PSP phone and SPOnG has contacted Sony Ericsson for further comment - more details here.

Sony Ericsson has recently filed a patent which indicates that a PSP phone might be due soon, as you can see from a diagram included in the patent, right here.

You can see that the proposed design features both a moveable screen, which swivels 90-degrees into widescreen mode, along with gaming controllers which look very similar to the current PSP model.

The proposed PSP phone follows on from other Sony Ericsson phone models such as the Walkman branded music player phones and Cybershot branded camera phones.

SPOnG will be digging around to find out more about the PSP phone in the run up to E3 over the coming weeks, where we will no doubt also be hearing more from Nokia regarding the proposed relaunch of its N-Gage gaming phone.

Are mobile phone games about to finally be worth a look in?

For the full unexpurgated detail on the patent you can check the original filing right here.