Major video games developers at the E3 gaming convention are "ignoring" mobile phone users, an industry expert has said.

Gaming giants including Sony and Microsoft are showcasing new PlayStation and Xbox games at the industry trade show in Los Angeles this week.

But one analyst said there was a "glaring omission" on the convention floor - titles aimed at smartphone and tablet users.

Richard Windsor, from Edison Investment Research, said: "E3 is the biggest trade show for the computer games industry but it still seems to be ignoring one of its most important segments: gaming on mobile devices."

Mr Windsor said that while console and mobile gaming were "radically different" in their complexity, hardware required and time played, many consumers used both.

"This means that the software and hardware required to address this segment is completely different but that does not mean that there is no opportunity for the PC and console players in mobile," he said.

"These are different games, played in a different way with a different monetisation system but because the players are the same we see no reason why the big game communities should not be leveraged into mobile."

According to a recent report by gaming insights firm Newzoo, the mobile games industry will generate more than 46 billion dollars in global revenue in 2017.

However, several high profile mobile gaming products have been announced at E3, including the first smartphone game set in the South Park universe.

The game - Phone Destroyer - is a battle game based on characters from the cartoon series and is due to launch next year.

PlayStation has also announced a social gaming tool called PlayLink, which enables groups of users with to each connect their phone or tablet to a PlayStation 4 console and use the device as a controller.

Sony's Michael Denny said: "At PlayStation we've got a proud history of bringing new players to video games, and we're constantly looking at new ways to keep that trend going.

"PlayLink combines your smartphone or tablet device, TV and PS4 console, with a collection of brand new games that take advantage of the smartphone or tablet device's touchscreen and camera capabilities."

Call of Duty publisher Activision is also reportedly working on a new mobile game based on the franchise - created by mobile giant King - who Activision Blizzard acquired in 2016.